基类创建添加

Asteria.xcodeproj/project.pbxproj

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+   version = "1.0">
+   <FileRef
+      location = "group:Asteria.xcodeproj">
+   </FileRef>
+   <FileRef
+      location = "group:Pods/Pods.xcodeproj">
+   </FileRef>
+</Workspace>

Asteria/ASBaseNavController.h

@@ -0,0 +1,16 @@
+//
+//  ASBaseNavController.h
+//  Asteria
+//
+//  Created by iOS on 2023/4/24.
+//
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface ASBaseNavController : UINavigationController
+
+@end
+
+NS_ASSUME_NONNULL_END

Asteria/ASBaseNavController.m

@@ -0,0 +1,24 @@
+//
+//  ASBaseNavController.m
+//  Asteria
+//
+//  Created by iOS on 2023/4/24.
+//
+
+#import "ASBaseNavController.h"
+
+@interface ASBaseNavController ()
+
+@end
+
+@implementation ASBaseNavController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    // Do any additional setup after loading the view.
+    self.navigationBar.hidden = true;
+}
+
+
+
+@end

Asteria/ASBaseViewController.h

@@ -0,0 +1,24 @@
+//
+//  ASBaseViewController.h
+//  Asteria
+//
+//  Created by iOS on 2023/4/24.
+//
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface ASBaseViewController : UIViewController
+
+@property (nonatomic, strong) UIView *statusBgV;
+@property (nonatomic, strong) UIView *customNavBar;
+@property (nonatomic, copy) NSString *titleStr;
+@property (nonatomic, strong) UIImage *titleImg;
+
+@property (nonatomic, strong) UIView *leftV;
+@property (nonatomic, strong) UIView *rightV;
+
+@end
+
+NS_ASSUME_NONNULL_END

Asteria/ASBaseViewController.m

@@ -0,0 +1,52 @@
+//
+//  ASBaseViewController.m
+//  Asteria
+//
+//  Created by iOS on 2023/4/24.
+//
+
+#import "ASBaseViewController.h"
+
+@interface ASBaseViewController ()
+
+@end
+
+@implementation ASBaseViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    [self addBaseNav];
+    
+    self.view.backgroundColor = _F8F8F8;
+    
+}
+
+- (void)addBaseNav {
+    
+    [self.view addSubview:self.statusBgV];
+    [self.view addSubview:self.customNavBar];
+    self.statusBgV.frame = CGRectMake(0, 0, kScreenWidth, kStatusBarH);
+    self.customNavBar.frame = CGRectMake(0, kStatusBarH, kScreenWidth, kCustomNavBarH);
+}
+
+- (UIView *)statusBgV {
+    if (!_statusBgV) {
+        UIView *v = [UIView baseV];
+        v.backgroundColor = _32CFB0;
+        _statusBgV = v;
+    }
+    return _statusBgV;
+}
+
+- (UIView *)customNavBar {
+    if (!_customNavBar) {
+        UIView *v = [UIView baseV];
+        v.backgroundColor = _32CFB0;
+        _customNavBar = v;
+    }
+    return _customNavBar;
+}
+
+
+
+@end

Asteria/ASTabBarController.h

@@ -0,0 +1,16 @@
+//
+//  ASTabBarController.h
+//  Asteria
+//
+//  Created by iOS on 2023/4/24.
+//
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface ASTabBarController : UITabBarController
+
+@end
+
+NS_ASSUME_NONNULL_END

Asteria/ASTabBarController.m

@@ -0,0 +1,48 @@
+//
+//  ASTabBarController.m
+//  Asteria
+//
+//  Created by iOS on 2023/4/24.
+//
+
+#import "ASTabBarController.h"
+#import "ASBaseViewController.h"
+#import "ASBaseNavController.h"
+
+
+@interface ASTabBarController () <UITabBarDelegate>
+
+@end
+
+@implementation ASTabBarController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    
+    ASBaseViewController *vc1 = [ASBaseViewController new];
+    ASBaseViewController *vc2 = [ASBaseViewController new];
+    ASBaseViewController *vc3 = [ASBaseViewController new];
+    
+    ASBaseNavController *nav1 = [[ASBaseNavController alloc] initWithRootViewController:vc1];
+    ASBaseNavController *nav2 = [[ASBaseNavController alloc] initWithRootViewController:vc2];
+    ASBaseNavController *nav3 = [[ASBaseNavController alloc] initWithRootViewController:vc3];
+    NSMutableArray <UINavigationController *>*vcs = [NSMutableArray arrayWithArray:@[nav1,nav2,nav3]];
+    NSArray *titleArr = @[@"Search",@"Home",@"Me"];
+    NSArray *imgArr = @[@"", @"", @""];
+    NSArray *selimgArr = @[@"", @"", @""];
+    NSMutableArray *items = [NSMutableArray array];
+    for (int i = 0; i < titleArr.count; i++) {
+        vcs[i].tabBarItem.title = titleArr[i];
+        vcs[i].tabBarItem.image = [UIImage imageNamed: imgArr[i]];
+        vcs[i].tabBarItem.selectedImage = [UIImage imageNamed: selimgArr[i]];
+        
+    }
+    
+    
+    
+    self.viewControllers = vcs;
+    
+}
+
+
+@end

Asteria/AppDelegate.h

@@ -0,0 +1,16 @@
+//
+//  AppDelegate.h
+//  Asteria
+//
+//  Created by iOS on 2023/4/22.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface AppDelegate : UIResponder <UIApplicationDelegate>
+
+@property (nonatomic, strong) UIWindow *window;
+
+
+@end
+

Asteria/AppDelegate.m

@@ -0,0 +1,89 @@
+//
+//  AppDelegate.m
+//  Asteria
+//
+//  Created by iOS on 2023/4/22.
+//
+
+#import "AppDelegate.h"
+#import "ASTabBarController.h"
+
+
+@interface AppDelegate ()
+
+//@property (nonatomic, strong, readonly) UIWindow *window;
+
+@end
+
+@implementation AppDelegate
+
+
+- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
+    // Override point for customization after application launch.
+    self.window = [[UIWindow alloc] initWithFrame:UIScreen.mainScreen.bounds];
+    
+    
+    
+    ASTabBarController *tab = [[ASTabBarController alloc] init];
+    
+    self.window.rootViewController = tab;
+    [self.window makeKeyAndVisible];
+    
+    
+    return YES;
+}
+- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {
+    NSLog(@"--------userInfo:%@",userInfo);
+//    completionHandler(UIBackgroundFetchResultNewData);
+    [self handlePush:userInfo];
+    
+}
+
+#pragma mark - dealwith push data
+
+/// 处理来自远程的推送内容
+- (void)handlePush:(NSDictionary *)payLoad {
+    if (payLoad == nil) {
+        return;
+    }
+    
+    NSDictionary *aps = [payLoad valueForKey:@"aps"];
+    if (aps == nil) {
+        return;
+    }
+    
+    UIApplication *application = [UIApplication sharedApplication];
+   
+    // 当前 APP 在前台
+    if (application.applicationState == UIApplicationStateActive || application.applicationState == UIApplicationStateBackground) { //活动状态下使用消息提示再提示一下,让用户可以点击
+        // 备注:这边比较特殊,当 APP 在前台时,当推送来的时候,会来到这个方法,当点击推送弹窗后,这个方法会再次调用,即这个方法会调用两次,走两次 push 操作.
+        NSLog(@"payLoad=%@",payLoad);
+//        [self handlePushAction:payLoad];  // 处理推送消息
+
+    } else {
+        [self handlePushAction:payLoad];  // 处理推送消息
+    }
+}
+
+- (void)handlePushAction:(NSDictionary *)payLoad {
+    
+    NSDictionary *customData = payLoad[@"custom"][@"a"];
+    NSString *title = customData[@"title"];
+    NSString *push_para = customData[@"push_para"];
+    NSString *message_id = customData[@"message_id"];
+    NSNumber *push_type = customData[@"push_type"];
+    if (!push_type) {
+        return;
+    }
+    NSInteger type = push_type.integerValue;
+    
+    
+//    [[KWPushMessageHandler shareInstance] handleMessage:title messageId:message_id pushPara:push_para pushType:type];
+    
+    
+}
+
+
+
+
+@end

Asteria/Assets.xcassets/AccentColor.colorset/Contents.json

@@ -0,0 +1,11 @@
+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Asteria/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,13 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Asteria/Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Asteria/Base.lproj/LaunchScreen.storyboard

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.12"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="EHf-IW-A2E">
+            <objects>
+                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
+                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
+                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" xcode11CocoaTouchSystemColor="systemBackgroundColor" cocoaTouchSystemColor="whiteColor"/>
+                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="53" y="375"/>
+        </scene>
+    </scenes>
+</document>

Asteria/ColorDefine.h

@@ -0,0 +1,36 @@
+//
+//  ColorDefine.h
+//  Asteria
+//
+//  Created by iOS on 2023/4/24.
+//
+
+#ifndef ColorDefine_h
+#define ColorDefine_h
+
+#define _FFF5F0 ([UIColor colorWithHexString:@"#FFF5F0"])
+#define _FFD1B9 ([UIColor colorWithHexString:@"#FFD1B9"])
+
+#define _414141 ([UIColor colorWithHexString:@"#414141"])
+#define _262626 ([UIColor colorWithHexString:@"#262626"])
+#define _0B0B0B ([UIColor colorWithHexString:@"#0B0B0B"])
+
+#define _F8F8F8 ([UIColor colorWithHexString:@"#F8F8F8"])
+#define _F0F0F0 ([UIColor colorWithHexString:@"#F0F0F0"])
+
+#define _1C1C1C ([UIColor colorWithHexString:@"#1C1C1C"])
+#define _6F4A4A ([UIColor colorWithHexString:@"#6F4A4A"])
+
+#define _80695D ([UIColor colorWithHexString:@"#80695D"])
+#define _FED1B9 ([UIColor colorWithHexString:@"#FED1B9"])
+
+#define _FFF8F9 ([UIColor colorWithHexString:@"#FFF8F9"])
+#define _FFDEE2 ([UIColor colorWithHexString:@"#FFDEE2"])
+#define _B39B9E ([UIColor colorWithHexString:@"#B39B9E"])
+
+#define _404040 ([UIColor colorWithHexString:@"#404040"])
+
+// as主题色 绿色
+#define _32CFB0 ([UIColor colorWithHexString:@"#32CFB0"])
+
+#endif /* ColorDefine_h */

Asteria/Extensions/UIColor+AS.h

@@ -0,0 +1,21 @@
+//
+//  UIColor+AS.h
+//  Asteria
+//
+//  Created by iOS on 2023/4/25.
+//
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface UIColor (AS)
+
+//16进制颜色转换
++ (UIColor *)colorWithHexString:(NSString *)color;
+
++ (UIColor *)colorWithHexString:(NSString *)color Alpha:(CGFloat)alpha;
+
+@end
+
+NS_ASSUME_NONNULL_END

Asteria/Extensions/UIColor+AS.m

@@ -0,0 +1,52 @@
+//
+//  UIColor+AS.m
+//  Asteria
+//
+//  Created by iOS on 2023/4/25.
+//
+
+#import "UIColor+AS.h"
+
+@implementation UIColor (AS)
+
++ (UIColor *)colorWithHexString:(NSString *)color {
+    return [self colorWithHexString:color Alpha:1.0f];
+}
+
++ (UIColor *)colorWithHexString:(NSString *)color Alpha:(CGFloat)alpha {
+    NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
+    if ([cString length] < 6) {
+        return [UIColor clearColor];
+    }
+    
+    //判断前缀
+    if ([cString hasPrefix:@"0X"]) {
+        cString = [cString substringFromIndex:2];
+    }
+    if ([cString hasPrefix:@"#"]) {
+        cString = [cString substringFromIndex:1];
+    }
+    if ([cString length] != 6) {
+        return [UIColor clearColor];
+    }
+    
+    //从六位数值中找到RGB对应的位数并转换
+    NSRange range;
+    range.location = 0;
+    range.length = 2;
+    //R G B
+    NSString *rString = [cString substringWithRange:range];
+    range.location = 2;
+    NSString *gString = [cString substringWithRange:range];
+    range.location = 4;
+    NSString *bString = [cString substringWithRange:range];
+    
+    unsigned int r, g, b;
+    [[NSScanner scannerWithString:rString] scanHexInt:&r];
+    [[NSScanner scannerWithString:gString] scanHexInt:&g];
+    [[NSScanner scannerWithString:bString] scanHexInt:&b];
+    
+    return [UIColor colorWithRed:((float) r / 255.0f) green:((float) g / 255.0f) blue:((float) b / 255.0f) alpha:alpha];
+}
+
+@end

Asteria/Extensions/UIView+PublicInit.h

@@ -0,0 +1,25 @@
+//
+//  UIView+PublicInit.h
+//  Asteria
+//
+//  Created by iOS on 2023/4/24.
+//
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface UIView (PublicInit)
+
+// MARK: + base create
++ (UIView *)baseV;
+
++ (UILabel *)baseLb;
+
++ (UIImageView *)baseImgV;
+
++ (UIStackView *)baseStackV:(BOOL)isVertical;
+
+@end
+
+NS_ASSUME_NONNULL_END

Asteria/Extensions/UIView+PublicInit.m

@@ -0,0 +1,42 @@
+//
+//  UIView+PublicInit.m
+//  Asteria
+//
+//  Created by iOS on 2023/4/24.
+//
+
+#import "UIView+PublicInit.h"
+
+@implementation UIView (PublicInit)
+
+// MARK: - base create
++ (UIView *)baseV {
+    UIView *v = [[UIView alloc] init];
+    v.backgroundColor = UIColor.whiteColor;
+    return v;
+}
+
++ (UILabel *)baseLb {
+    UILabel *lb = [[UILabel alloc] init];
+    lb.font = [UIFont fontWithName:Rob_Regular size:14];
+    lb.textColor = [UIColor blackColor];
+    lb.backgroundColor = [UIColor clearColor];
+    return lb;
+}
+
++ (UIImageView *)baseImgV {
+    UIImageView *imgV = [[UIImageView alloc] init];
+    imgV.contentMode = UIViewContentModeScaleAspectFit;
+    return imgV;
+}
+
++ (UIStackView *)baseStackV:(BOOL)isVertical {
+    UIStackView *stackV = [[UIStackView alloc] init];
+    stackV.axis = isVertical ? UILayoutConstraintAxisVertical : UILayoutConstraintAxisHorizontal;
+    stackV.spacing = 8;
+    stackV.alignment = UIStackViewAlignmentFill;
+    stackV.distribution = UIStackViewDistributionFill;
+    return stackV;
+}
+
+@end

Asteria/FontDefine.h

@@ -0,0 +1,26 @@
+//
+//  FontDefine.h
+//  Asteria
+//
+//  Created by iOS on 2023/4/24.
+//
+
+#ifndef FontDefine_h
+#define FontDefine_h
+
+#pragma mark - *********** 字体名称 **************
+#define Rob_Regular @"Roboto-Regular"
+#define Rob_Black @"Roboto-Black"
+#define Rob_BlackItalic @"Roboto-BlackItalic"
+#define Rob_Bold @"Roboto-Bold"
+#define Rob_BoldItalic @"Roboto-BoldItalic"
+#define Rob_Light @"Roboto-Light"
+#define Rob_LightItalic @"Roboto-LightItalic"
+#define Rob_Medium @"Roboto-Medium"
+#define Rob_MediumItalic @"Roboto-MediumItalic"
+#define Rob_ThinItalic @"Roboto-ThinItalic"
+#define Rob_Thin @"Roboto-Thin"
+
+
+
+#endif /* FontDefine_h */

Asteria/Info.plist

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>UIApplicationSceneManifest</key>
+	<dict>
+		<key>UIApplicationSupportsMultipleScenes</key>
+		<false/>
+	</dict>
+</dict>
+</plist>

Asteria/PreFixHeader.h

@@ -0,0 +1,20 @@
+//
+//  PreFixHeader.h
+//  Asteria
+//
+//  Created by iOS on 2023/4/24.
+//
+
+#ifndef PreFixHeader_h
+#define PreFixHeader_h
+
+#import "UIView+PublicInit.h"
+#import "UIColor+AS.h"
+#import "ColorDefine.h"
+#import "FontDefine.h"
+#import <YYKit/YYKit.h>
+#import "SizeDefine.h"
+
+typedef void (^btnClickBlock)(void);
+
+#endif /* PreFixHeader_h */

Asteria/SizeDefine.h

@@ -0,0 +1,16 @@
+//
+//  SizeDefine.h
+//  Asteria
+//
+//  Created by iOS on 2023/5/3.
+//
+
+#ifndef SizeDefine_h
+#define SizeDefine_h
+
+#import "LYTools.h"
+
+#define kStatusBarH ([LYTools getStatusBarHight])//([UIApplication sharedApplication].statusBarFrame.size.height)
+#define kCustomNavBarH (60)
+
+#endif /* SizeDefine_h */

Asteria/Tools/LYTools.h

@@ -0,0 +1,18 @@
+//
+//  LYTools.h
+//  Asteria
+//
+//  Created by iOS on 2023/5/3.
+//
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface LYTools : NSObject
+
++ (CGFloat)getStatusBarHight;
+
+@end
+
+NS_ASSUME_NONNULL_END

Asteria/Tools/LYTools.m

@@ -0,0 +1,24 @@
+//
+//  LYTools.m
+//  Asteria
+//
+//  Created by iOS on 2023/5/3.
+//
+
+#import "LYTools.h"
+
+@implementation LYTools
+
++ (CGFloat)getStatusBarHight {
+   float statusBarHeight = 0;
+   if (@available(iOS 13.0, *)) {
+       UIStatusBarManager *statusBarManager = [UIApplication sharedApplication].windows.firstObject.windowScene.statusBarManager;
+       statusBarHeight = statusBarManager.statusBarFrame.size.height;
+   }
+   else {
+       statusBarHeight = [UIApplication sharedApplication].statusBarFrame.size.height;
+   }
+   return statusBarHeight;
+}
+
+@end

Asteria/main.m

@@ -0,0 +1,18 @@
+//
+//  main.m
+//  Asteria
+//
+//  Created by iOS on 2023/4/22.
+//
+
+#import <UIKit/UIKit.h>
+#import "AppDelegate.h"
+
+int main(int argc, char * argv[]) {
+    NSString * appDelegateClassName;
+    @autoreleasepool {
+        // Setup code that might create autoreleased objects goes here.
+        appDelegateClassName = NSStringFromClass([AppDelegate class]);
+    }
+    return UIApplicationMain(argc, argv, nil, appDelegateClassName);
+}

NotificationServiceExtension/Info.plist

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>NSExtension</key>
+	<dict>
+		<key>NSExtensionPointIdentifier</key>
+		<string>com.apple.usernotifications.service</string>
+		<key>NSExtensionPrincipalClass</key>
+		<string>NotificationService</string>
+	</dict>
+</dict>
+</plist>

NotificationServiceExtension/NotificationService.h

@@ -0,0 +1,12 @@
+//
+//  NotificationService.h
+//  NotificationServiceExtension
+//
+//  Created by iOS on 2023/4/22.
+//
+
+#import <UserNotifications/UserNotifications.h>
+
+@interface NotificationService : UNNotificationServiceExtension
+
+@end

NotificationServiceExtension/NotificationService.m

@@ -0,0 +1,43 @@
+//
+//  NotificationService.m
+//  NotificationServiceExtension
+//
+//  Created by iOS on 2023/4/22.
+//
+
+#import "NotificationService.h"
+#import <UIKit/UIKit.h>
+#import <OneSignal/OneSignal.h>
+
+@interface NotificationService ()
+
+@property (nonatomic, strong) void (^contentHandler)(UNNotificationContent *contentToDeliver);
+@property (nonatomic, strong) UNMutableNotificationContent *bestAttemptContent;
+
+//@property (nonatomic, strong) void (^contentHandler)(UNNotificationContent *contentToDeliver);
+@property (nonatomic, strong) UNNotificationRequest *receivedRequest;
+//@property (nonatomic, strong) UNMutableNotificationContent *bestAttemptContent;
+
+@end
+
+@implementation NotificationService
+
+- (void)didReceiveNotificationRequest:(UNNotificationRequest *)request withContentHandler:(void (^)(UNNotificationContent * _Nonnull))contentHandler {
+    self.receivedRequest = request;
+        self.contentHandler = contentHandler;
+        self.bestAttemptContent = [request.content mutableCopy];
+    
+    [OneSignal didReceiveNotificationExtensionRequest:self.receivedRequest
+                           withMutableNotificationContent:self.bestAttemptContent
+                                       withContentHandler:self.contentHandler];
+    
+}
+
+- (void)serviceExtensionTimeWillExpire {
+    NSLog(@"------serviceExtensionTimeWillExpire-------");
+    [OneSignal serviceExtensionTimeWillExpireRequest:self.receivedRequest withMutableNotificationContent:self.bestAttemptContent];
+        
+        self.contentHandler(self.bestAttemptContent);
+}
+
+@end

Podfile

@@ -0,0 +1,67 @@
+platform :ios, '12.0'
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    target.build_configurations.each do |config|
+      config.build_settings['APPLICATION_EXTENSION_API_ONLY'] = 'No'
+    end
+  end
+end
+
+target 'Asteria' do
+  use_frameworks!
+
+  pod 'AFNetworking'
+  pod 'MBProgressHUD'
+  pod 'YYKit'
+  pod 'MJRefresh'
+  pod 'MJExtension'
+  pod 'SDWebImage'
+  pod 'Masonry'
+  # 键盘管理
+  pod 'IQKeyboardManager'
+  # iOS自定义Badge组件, 支持UIView, UITabBarItem, UIBarButtonItem, 支持Objective-C/Swift
+  pod 'PPBadgeView'
+  #可以block使用的选择器
+  pod 'Toast'
+  # 检测网络状态
+  pod 'Reachability'
+
+  #评价---星星
+  pod 'HCSStarRatingView', '~> 1.5'
+  
+  pod 'BraintreeDropIn'
+#  pod 'PayPalCheckout', '0.102.0'
+  pod 'Bugly'
+  
+  pod 'FBSDKLoginKit'
+  
+  pod 'GoogleSignIn'
+  pod 'GKPhotoBrowser'
+  
+  pod "KlarnaMobileSDK"
+
+pod 'OneSignalXCFramework', '>= 3.0.0', '< 4.0'
+
+# 数据分析
+# Add the Firebase pod for Google Analytics
+pod 'FirebaseAnalytics'
+# Google 地点自动补齐
+pod 'GooglePlaces'
+
+# For Analytics without IDFA collection capability, use this pod instead
+# pod ‘Firebase/AnalyticsWithoutAdIdSupport’
+
+# Add the pods for any other Firebase products you want to use in your app
+# For example, to use Firebase Authentication and Cloud Firestore
+pod 'FirebaseCore'#, :git => 'https://github.com/firebase/firebase-ios-sdk.git', :branch => 'master'
+pod 'FirebaseFirestore'#, :git => 'https://github.com/firebase/firebase-ios-sdk.git', :branch => 'master'
+
+  target 'NotificationServiceExtension' do #'OneSignalNotificationServiceExtension' do
+    # Comment the next line if you don't want to use dynamic frameworks
+    use_frameworks!
+    pod 'OneSignalXCFramework', '>= 3.0.0', '< 4.0'
+  end
+  
+  
+end

Podfile.lock

@@ -0,0 +1,967 @@
+PODS:
+  - abseil/algorithm (1.20211102.0):
+    - abseil/algorithm/algorithm (= 1.20211102.0)
+    - abseil/algorithm/container (= 1.20211102.0)
+  - abseil/algorithm/algorithm (1.20211102.0):
+    - abseil/base/config
+  - abseil/algorithm/container (1.20211102.0):
+    - abseil/algorithm/algorithm
+    - abseil/base/core_headers
+    - abseil/meta/type_traits
+  - abseil/base (1.20211102.0):
+    - abseil/base/atomic_hook (= 1.20211102.0)
+    - abseil/base/base (= 1.20211102.0)
+    - abseil/base/base_internal (= 1.20211102.0)
+    - abseil/base/config (= 1.20211102.0)
+    - abseil/base/core_headers (= 1.20211102.0)
+    - abseil/base/dynamic_annotations (= 1.20211102.0)
+    - abseil/base/endian (= 1.20211102.0)
+    - abseil/base/errno_saver (= 1.20211102.0)
+    - abseil/base/fast_type_id (= 1.20211102.0)
+    - abseil/base/log_severity (= 1.20211102.0)
+    - abseil/base/malloc_internal (= 1.20211102.0)
+    - abseil/base/pretty_function (= 1.20211102.0)
+    - abseil/base/raw_logging_internal (= 1.20211102.0)
+    - abseil/base/spinlock_wait (= 1.20211102.0)
+    - abseil/base/strerror (= 1.20211102.0)
+    - abseil/base/throw_delegate (= 1.20211102.0)
+  - abseil/base/atomic_hook (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+  - abseil/base/base (1.20211102.0):
+    - abseil/base/atomic_hook
+    - abseil/base/base_internal
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/dynamic_annotations
+    - abseil/base/log_severity
+    - abseil/base/raw_logging_internal
+    - abseil/base/spinlock_wait
+    - abseil/meta/type_traits
+  - abseil/base/base_internal (1.20211102.0):
+    - abseil/base/config
+    - abseil/meta/type_traits
+  - abseil/base/config (1.20211102.0)
+  - abseil/base/core_headers (1.20211102.0):
+    - abseil/base/config
+  - abseil/base/dynamic_annotations (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+  - abseil/base/endian (1.20211102.0):
+    - abseil/base/base
+    - abseil/base/config
+    - abseil/base/core_headers
+  - abseil/base/errno_saver (1.20211102.0):
+    - abseil/base/config
+  - abseil/base/fast_type_id (1.20211102.0):
+    - abseil/base/config
+  - abseil/base/log_severity (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+  - abseil/base/malloc_internal (1.20211102.0):
+    - abseil/base/base
+    - abseil/base/base_internal
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/dynamic_annotations
+    - abseil/base/raw_logging_internal
+  - abseil/base/pretty_function (1.20211102.0)
+  - abseil/base/raw_logging_internal (1.20211102.0):
+    - abseil/base/atomic_hook
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/log_severity
+  - abseil/base/spinlock_wait (1.20211102.0):
+    - abseil/base/base_internal
+    - abseil/base/core_headers
+    - abseil/base/errno_saver
+  - abseil/base/strerror (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/errno_saver
+  - abseil/base/throw_delegate (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/raw_logging_internal
+  - abseil/container/common (1.20211102.0):
+    - abseil/meta/type_traits
+    - abseil/types/optional
+  - abseil/container/compressed_tuple (1.20211102.0):
+    - abseil/utility/utility
+  - abseil/container/container_memory (1.20211102.0):
+    - abseil/base/config
+    - abseil/memory/memory
+    - abseil/meta/type_traits
+    - abseil/utility/utility
+  - abseil/container/fixed_array (1.20211102.0):
+    - abseil/algorithm/algorithm
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/dynamic_annotations
+    - abseil/base/throw_delegate
+    - abseil/container/compressed_tuple
+    - abseil/memory/memory
+  - abseil/container/flat_hash_map (1.20211102.0):
+    - abseil/algorithm/container
+    - abseil/container/container_memory
+    - abseil/container/hash_function_defaults
+    - abseil/container/raw_hash_map
+    - abseil/memory/memory
+  - abseil/container/hash_function_defaults (1.20211102.0):
+    - abseil/base/config
+    - abseil/hash/hash
+    - abseil/strings/cord
+    - abseil/strings/strings
+  - abseil/container/hash_policy_traits (1.20211102.0):
+    - abseil/meta/type_traits
+  - abseil/container/hashtable_debug_hooks (1.20211102.0):
+    - abseil/base/config
+  - abseil/container/hashtablez_sampler (1.20211102.0):
+    - abseil/base/base
+    - abseil/base/core_headers
+    - abseil/container/have_sse
+    - abseil/debugging/stacktrace
+    - abseil/memory/memory
+    - abseil/profiling/exponential_biased
+    - abseil/profiling/sample_recorder
+    - abseil/synchronization/synchronization
+    - abseil/utility/utility
+  - abseil/container/have_sse (1.20211102.0)
+  - abseil/container/inlined_vector (1.20211102.0):
+    - abseil/algorithm/algorithm
+    - abseil/base/core_headers
+    - abseil/base/throw_delegate
+    - abseil/container/inlined_vector_internal
+    - abseil/memory/memory
+  - abseil/container/inlined_vector_internal (1.20211102.0):
+    - abseil/base/core_headers
+    - abseil/container/compressed_tuple
+    - abseil/memory/memory
+    - abseil/meta/type_traits
+    - abseil/types/span
+  - abseil/container/layout (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/meta/type_traits
+    - abseil/strings/strings
+    - abseil/types/span
+    - abseil/utility/utility
+  - abseil/container/raw_hash_map (1.20211102.0):
+    - abseil/base/throw_delegate
+    - abseil/container/container_memory
+    - abseil/container/raw_hash_set
+  - abseil/container/raw_hash_set (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/endian
+    - abseil/container/common
+    - abseil/container/compressed_tuple
+    - abseil/container/container_memory
+    - abseil/container/hash_policy_traits
+    - abseil/container/hashtable_debug_hooks
+    - abseil/container/hashtablez_sampler
+    - abseil/container/have_sse
+    - abseil/memory/memory
+    - abseil/meta/type_traits
+    - abseil/numeric/bits
+    - abseil/utility/utility
+  - abseil/debugging/debugging_internal (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/dynamic_annotations
+    - abseil/base/errno_saver
+    - abseil/base/raw_logging_internal
+  - abseil/debugging/demangle_internal (1.20211102.0):
+    - abseil/base/base
+    - abseil/base/config
+    - abseil/base/core_headers
+  - abseil/debugging/stacktrace (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/debugging/debugging_internal
+  - abseil/debugging/symbolize (1.20211102.0):
+    - abseil/base/base
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/dynamic_annotations
+    - abseil/base/malloc_internal
+    - abseil/base/raw_logging_internal
+    - abseil/debugging/debugging_internal
+    - abseil/debugging/demangle_internal
+    - abseil/strings/strings
+  - abseil/functional/bind_front (1.20211102.0):
+    - abseil/base/base_internal
+    - abseil/container/compressed_tuple
+    - abseil/meta/type_traits
+    - abseil/utility/utility
+  - abseil/functional/function_ref (1.20211102.0):
+    - abseil/base/base_internal
+    - abseil/base/core_headers
+    - abseil/meta/type_traits
+  - abseil/hash/city (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/endian
+  - abseil/hash/hash (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/endian
+    - abseil/container/fixed_array
+    - abseil/hash/city
+    - abseil/hash/low_level_hash
+    - abseil/meta/type_traits
+    - abseil/numeric/int128
+    - abseil/strings/strings
+    - abseil/types/optional
+    - abseil/types/variant
+    - abseil/utility/utility
+  - abseil/hash/low_level_hash (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/endian
+    - abseil/numeric/bits
+    - abseil/numeric/int128
+  - abseil/memory (1.20211102.0):
+    - abseil/memory/memory (= 1.20211102.0)
+  - abseil/memory/memory (1.20211102.0):
+    - abseil/base/core_headers
+    - abseil/meta/type_traits
+  - abseil/meta (1.20211102.0):
+    - abseil/meta/type_traits (= 1.20211102.0)
+  - abseil/meta/type_traits (1.20211102.0):
+    - abseil/base/config
+  - abseil/numeric/bits (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+  - abseil/numeric/int128 (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/numeric/bits
+  - abseil/numeric/representation (1.20211102.0):
+    - abseil/base/config
+  - abseil/profiling/exponential_biased (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+  - abseil/profiling/sample_recorder (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/synchronization/synchronization
+    - abseil/time/time
+  - abseil/random/distributions (1.20211102.0):
+    - abseil/base/base_internal
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/meta/type_traits
+    - abseil/numeric/bits
+    - abseil/random/internal/distribution_caller
+    - abseil/random/internal/fast_uniform_bits
+    - abseil/random/internal/fastmath
+    - abseil/random/internal/generate_real
+    - abseil/random/internal/iostream_state_saver
+    - abseil/random/internal/traits
+    - abseil/random/internal/uniform_helper
+    - abseil/random/internal/wide_multiply
+    - abseil/strings/strings
+  - abseil/random/internal/distribution_caller (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/fast_type_id
+    - abseil/utility/utility
+  - abseil/random/internal/fast_uniform_bits (1.20211102.0):
+    - abseil/base/config
+    - abseil/meta/type_traits
+  - abseil/random/internal/fastmath (1.20211102.0):
+    - abseil/numeric/bits
+  - abseil/random/internal/generate_real (1.20211102.0):
+    - abseil/meta/type_traits
+    - abseil/numeric/bits
+    - abseil/random/internal/fastmath
+    - abseil/random/internal/traits
+  - abseil/random/internal/iostream_state_saver (1.20211102.0):
+    - abseil/meta/type_traits
+    - abseil/numeric/int128
+  - abseil/random/internal/nonsecure_base (1.20211102.0):
+    - abseil/base/core_headers
+    - abseil/meta/type_traits
+    - abseil/random/internal/pool_urbg
+    - abseil/random/internal/salted_seed_seq
+    - abseil/random/internal/seed_material
+    - abseil/types/optional
+    - abseil/types/span
+  - abseil/random/internal/pcg_engine (1.20211102.0):
+    - abseil/base/config
+    - abseil/meta/type_traits
+    - abseil/numeric/bits
+    - abseil/numeric/int128
+    - abseil/random/internal/fastmath
+    - abseil/random/internal/iostream_state_saver
+  - abseil/random/internal/platform (1.20211102.0):
+    - abseil/base/config
+  - abseil/random/internal/pool_urbg (1.20211102.0):
+    - abseil/base/base
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/endian
+    - abseil/base/raw_logging_internal
+    - abseil/random/internal/randen
+    - abseil/random/internal/seed_material
+    - abseil/random/internal/traits
+    - abseil/random/seed_gen_exception
+    - abseil/types/span
+  - abseil/random/internal/randen (1.20211102.0):
+    - abseil/base/raw_logging_internal
+    - abseil/random/internal/platform
+    - abseil/random/internal/randen_hwaes
+    - abseil/random/internal/randen_slow
+  - abseil/random/internal/randen_engine (1.20211102.0):
+    - abseil/base/endian
+    - abseil/meta/type_traits
+    - abseil/random/internal/iostream_state_saver
+    - abseil/random/internal/randen
+  - abseil/random/internal/randen_hwaes (1.20211102.0):
+    - abseil/base/config
+    - abseil/random/internal/platform
+    - abseil/random/internal/randen_hwaes_impl
+  - abseil/random/internal/randen_hwaes_impl (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/numeric/int128
+    - abseil/random/internal/platform
+  - abseil/random/internal/randen_slow (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/endian
+    - abseil/numeric/int128
+    - abseil/random/internal/platform
+  - abseil/random/internal/salted_seed_seq (1.20211102.0):
+    - abseil/container/inlined_vector
+    - abseil/meta/type_traits
+    - abseil/random/internal/seed_material
+    - abseil/types/optional
+    - abseil/types/span
+  - abseil/random/internal/seed_material (1.20211102.0):
+    - abseil/base/core_headers
+    - abseil/base/dynamic_annotations
+    - abseil/base/raw_logging_internal
+    - abseil/random/internal/fast_uniform_bits
+    - abseil/strings/strings
+    - abseil/types/optional
+    - abseil/types/span
+  - abseil/random/internal/traits (1.20211102.0):
+    - abseil/base/config
+  - abseil/random/internal/uniform_helper (1.20211102.0):
+    - abseil/base/config
+    - abseil/meta/type_traits
+    - abseil/random/internal/traits
+  - abseil/random/internal/wide_multiply (1.20211102.0):
+    - abseil/base/config
+    - abseil/numeric/bits
+    - abseil/numeric/int128
+    - abseil/random/internal/traits
+  - abseil/random/random (1.20211102.0):
+    - abseil/random/distributions
+    - abseil/random/internal/nonsecure_base
+    - abseil/random/internal/pcg_engine
+    - abseil/random/internal/pool_urbg
+    - abseil/random/internal/randen_engine
+    - abseil/random/seed_sequences
+  - abseil/random/seed_gen_exception (1.20211102.0):
+    - abseil/base/config
+  - abseil/random/seed_sequences (1.20211102.0):
+    - abseil/container/inlined_vector
+    - abseil/random/internal/nonsecure_base
+    - abseil/random/internal/pool_urbg
+    - abseil/random/internal/salted_seed_seq
+    - abseil/random/internal/seed_material
+    - abseil/random/seed_gen_exception
+    - abseil/types/span
+  - abseil/status/status (1.20211102.0):
+    - abseil/base/atomic_hook
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/raw_logging_internal
+    - abseil/container/inlined_vector
+    - abseil/debugging/stacktrace
+    - abseil/debugging/symbolize
+    - abseil/functional/function_ref
+    - abseil/strings/cord
+    - abseil/strings/str_format
+    - abseil/strings/strings
+    - abseil/types/optional
+  - abseil/status/statusor (1.20211102.0):
+    - abseil/base/base
+    - abseil/base/core_headers
+    - abseil/base/raw_logging_internal
+    - abseil/meta/type_traits
+    - abseil/status/status
+    - abseil/strings/strings
+    - abseil/types/variant
+    - abseil/utility/utility
+  - abseil/strings/cord (1.20211102.0):
+    - abseil/base/base
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/endian
+    - abseil/base/raw_logging_internal
+    - abseil/container/fixed_array
+    - abseil/container/inlined_vector
+    - abseil/functional/function_ref
+    - abseil/meta/type_traits
+    - abseil/strings/cord_internal
+    - abseil/strings/cordz_functions
+    - abseil/strings/cordz_info
+    - abseil/strings/cordz_statistics
+    - abseil/strings/cordz_update_scope
+    - abseil/strings/cordz_update_tracker
+    - abseil/strings/internal
+    - abseil/strings/str_format
+    - abseil/strings/strings
+    - abseil/types/optional
+  - abseil/strings/cord_internal (1.20211102.0):
+    - abseil/base/base_internal
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/endian
+    - abseil/base/raw_logging_internal
+    - abseil/base/throw_delegate
+    - abseil/container/compressed_tuple
+    - abseil/container/inlined_vector
+    - abseil/container/layout
+    - abseil/functional/function_ref
+    - abseil/meta/type_traits
+    - abseil/strings/strings
+    - abseil/types/span
+  - abseil/strings/cordz_functions (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/raw_logging_internal
+    - abseil/profiling/exponential_biased
+  - abseil/strings/cordz_handle (1.20211102.0):
+    - abseil/base/base
+    - abseil/base/config
+    - abseil/base/raw_logging_internal
+    - abseil/synchronization/synchronization
+  - abseil/strings/cordz_info (1.20211102.0):
+    - abseil/base/base
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/raw_logging_internal
+    - abseil/container/inlined_vector
+    - abseil/debugging/stacktrace
+    - abseil/strings/cord_internal
+    - abseil/strings/cordz_functions
+    - abseil/strings/cordz_handle
+    - abseil/strings/cordz_statistics
+    - abseil/strings/cordz_update_tracker
+    - abseil/synchronization/synchronization
+    - abseil/types/span
+  - abseil/strings/cordz_statistics (1.20211102.0):
+    - abseil/base/config
+    - abseil/strings/cordz_update_tracker
+  - abseil/strings/cordz_update_scope (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/strings/cord_internal
+    - abseil/strings/cordz_info
+    - abseil/strings/cordz_update_tracker
+  - abseil/strings/cordz_update_tracker (1.20211102.0):
+    - abseil/base/config
+  - abseil/strings/internal (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/endian
+    - abseil/base/raw_logging_internal
+    - abseil/meta/type_traits
+  - abseil/strings/str_format (1.20211102.0):
+    - abseil/strings/str_format_internal
+  - abseil/strings/str_format_internal (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/functional/function_ref
+    - abseil/meta/type_traits
+    - abseil/numeric/bits
+    - abseil/numeric/int128
+    - abseil/numeric/representation
+    - abseil/strings/strings
+    - abseil/types/optional
+    - abseil/types/span
+  - abseil/strings/strings (1.20211102.0):
+    - abseil/base/base
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/endian
+    - abseil/base/raw_logging_internal
+    - abseil/base/throw_delegate
+    - abseil/memory/memory
+    - abseil/meta/type_traits
+    - abseil/numeric/bits
+    - abseil/numeric/int128
+    - abseil/strings/internal
+  - abseil/synchronization/graphcycles_internal (1.20211102.0):
+    - abseil/base/base
+    - abseil/base/base_internal
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/malloc_internal
+    - abseil/base/raw_logging_internal
+  - abseil/synchronization/kernel_timeout_internal (1.20211102.0):
+    - abseil/base/core_headers
+    - abseil/base/raw_logging_internal
+    - abseil/time/time
+  - abseil/synchronization/synchronization (1.20211102.0):
+    - abseil/base/atomic_hook
+    - abseil/base/base
+    - abseil/base/base_internal
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/dynamic_annotations
+    - abseil/base/malloc_internal
+    - abseil/base/raw_logging_internal
+    - abseil/debugging/stacktrace
+    - abseil/debugging/symbolize
+    - abseil/synchronization/graphcycles_internal
+    - abseil/synchronization/kernel_timeout_internal
+    - abseil/time/time
+  - abseil/time (1.20211102.0):
+    - abseil/time/internal (= 1.20211102.0)
+    - abseil/time/time (= 1.20211102.0)
+  - abseil/time/internal (1.20211102.0):
+    - abseil/time/internal/cctz (= 1.20211102.0)
+  - abseil/time/internal/cctz (1.20211102.0):
+    - abseil/time/internal/cctz/civil_time (= 1.20211102.0)
+    - abseil/time/internal/cctz/time_zone (= 1.20211102.0)
+  - abseil/time/internal/cctz/civil_time (1.20211102.0):
+    - abseil/base/config
+  - abseil/time/internal/cctz/time_zone (1.20211102.0):
+    - abseil/base/config
+    - abseil/time/internal/cctz/civil_time
+  - abseil/time/time (1.20211102.0):
+    - abseil/base/base
+    - abseil/base/core_headers
+    - abseil/base/raw_logging_internal
+    - abseil/numeric/int128
+    - abseil/strings/strings
+    - abseil/time/internal/cctz/civil_time
+    - abseil/time/internal/cctz/time_zone
+  - abseil/types (1.20211102.0):
+    - abseil/types/any (= 1.20211102.0)
+    - abseil/types/bad_any_cast (= 1.20211102.0)
+    - abseil/types/bad_any_cast_impl (= 1.20211102.0)
+    - abseil/types/bad_optional_access (= 1.20211102.0)
+    - abseil/types/bad_variant_access (= 1.20211102.0)
+    - abseil/types/compare (= 1.20211102.0)
+    - abseil/types/optional (= 1.20211102.0)
+    - abseil/types/span (= 1.20211102.0)
+    - abseil/types/variant (= 1.20211102.0)
+  - abseil/types/any (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/base/fast_type_id
+    - abseil/meta/type_traits
+    - abseil/types/bad_any_cast
+    - abseil/utility/utility
+  - abseil/types/bad_any_cast (1.20211102.0):
+    - abseil/base/config
+    - abseil/types/bad_any_cast_impl
+  - abseil/types/bad_any_cast_impl (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/raw_logging_internal
+  - abseil/types/bad_optional_access (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/raw_logging_internal
+  - abseil/types/bad_variant_access (1.20211102.0):
+    - abseil/base/config
+    - abseil/base/raw_logging_internal
+  - abseil/types/compare (1.20211102.0):
+    - abseil/base/core_headers
+    - abseil/meta/type_traits
+  - abseil/types/optional (1.20211102.0):
+    - abseil/base/base_internal
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/memory/memory
+    - abseil/meta/type_traits
+    - abseil/types/bad_optional_access
+    - abseil/utility/utility
+  - abseil/types/span (1.20211102.0):
+    - abseil/algorithm/algorithm
+    - abseil/base/core_headers
+    - abseil/base/throw_delegate
+    - abseil/meta/type_traits
+  - abseil/types/variant (1.20211102.0):
+    - abseil/base/base_internal
+    - abseil/base/config
+    - abseil/base/core_headers
+    - abseil/meta/type_traits
+    - abseil/types/bad_variant_access
+    - abseil/utility/utility
+  - abseil/utility/utility (1.20211102.0):
+    - abseil/base/base_internal
+    - abseil/base/config
+    - abseil/meta/type_traits
+  - AFNetworking (4.0.1):
+    - AFNetworking/NSURLSession (= 4.0.1)
+    - AFNetworking/Reachability (= 4.0.1)
+    - AFNetworking/Security (= 4.0.1)
+    - AFNetworking/Serialization (= 4.0.1)
+    - AFNetworking/UIKit (= 4.0.1)
+  - AFNetworking/NSURLSession (4.0.1):
+    - AFNetworking/Reachability
+    - AFNetworking/Security
+    - AFNetworking/Serialization
+  - AFNetworking/Reachability (4.0.1)
+  - AFNetworking/Security (4.0.1)
+  - AFNetworking/Serialization (4.0.1)
+  - AFNetworking/UIKit (4.0.1):
+    - AFNetworking/NSURLSession
+  - AppAuth (1.6.0):
+    - AppAuth/Core (= 1.6.0)
+    - AppAuth/ExternalUserAgent (= 1.6.0)
+  - AppAuth/Core (1.6.0)
+  - AppAuth/ExternalUserAgent (1.6.0):
+    - AppAuth/Core
+  - BoringSSL-GRPC (0.0.24):
+    - BoringSSL-GRPC/Implementation (= 0.0.24)
+    - BoringSSL-GRPC/Interface (= 0.0.24)
+  - BoringSSL-GRPC/Implementation (0.0.24):
+    - BoringSSL-GRPC/Interface (= 0.0.24)
+  - BoringSSL-GRPC/Interface (0.0.24)
+  - Braintree/ApplePay (5.20.1):
+    - Braintree/Core
+  - Braintree/Card (5.20.1):
+    - Braintree/Core
+  - Braintree/Core (5.20.1)
+  - Braintree/PaymentFlow (5.20.1):
+    - Braintree/Core
+    - Braintree/PayPalDataCollector
+  - Braintree/PayPal (5.20.1):
+    - Braintree/Core
+    - Braintree/PayPalDataCollector
+  - Braintree/PayPalDataCollector (5.20.1)
+  - Braintree/ThreeDSecure (5.20.1):
+    - Braintree/Card
+    - Braintree/PaymentFlow
+  - Braintree/UnionPay (5.20.1):
+    - Braintree/Card
+  - Braintree/Venmo (5.20.1):
+    - Braintree/Core
+  - BraintreeDropIn (9.8.0):
+    - Braintree/ApplePay (~> 5.19)
+    - Braintree/Card (~> 5.19)
+    - Braintree/Core (~> 5.19)
+    - Braintree/PayPal (~> 5.19)
+    - Braintree/ThreeDSecure (~> 5.19)
+    - Braintree/UnionPay (~> 5.19)
+    - Braintree/Venmo (~> 5.19)
+  - Bugly (2.5.93)
+  - FBAEMKit (16.0.0):
+    - FBSDKCoreKit_Basics (= 16.0.0)
+  - FBSDKCoreKit (16.0.0):
+    - FBAEMKit (= 16.0.0)
+    - FBSDKCoreKit_Basics (= 16.0.0)
+  - FBSDKCoreKit_Basics (16.0.0)
+  - FBSDKLoginKit (16.0.0):
+    - FBSDKCoreKit (= 16.0.0)
+  - FirebaseAnalytics (10.5.0):
+    - FirebaseAnalytics/AdIdSupport (= 10.5.0)
+    - FirebaseCore (~> 10.0)
+    - FirebaseInstallations (~> 10.0)
+    - GoogleUtilities/AppDelegateSwizzler (~> 7.8)
+    - GoogleUtilities/MethodSwizzler (~> 7.8)
+    - GoogleUtilities/Network (~> 7.8)
+    - "GoogleUtilities/NSData+zlib (~> 7.8)"
+    - nanopb (< 2.30910.0, >= 2.30908.0)
+  - FirebaseAnalytics/AdIdSupport (10.5.0):
+    - FirebaseCore (~> 10.0)
+    - FirebaseInstallations (~> 10.0)
+    - GoogleAppMeasurement (= 10.5.0)
+    - GoogleUtilities/AppDelegateSwizzler (~> 7.8)
+    - GoogleUtilities/MethodSwizzler (~> 7.8)
+    - GoogleUtilities/Network (~> 7.8)
+    - "GoogleUtilities/NSData+zlib (~> 7.8)"
+    - nanopb (< 2.30910.0, >= 2.30908.0)
+  - FirebaseCore (10.5.0):
+    - FirebaseCoreInternal (~> 10.0)
+    - GoogleUtilities/Environment (~> 7.8)
+    - GoogleUtilities/Logger (~> 7.8)
+  - FirebaseCoreInternal (10.5.0):
+    - "GoogleUtilities/NSData+zlib (~> 7.8)"
+  - FirebaseFirestore (10.5.0):
+    - abseil/algorithm (~> 1.20211102.0)
+    - abseil/base (~> 1.20211102.0)
+    - abseil/container/flat_hash_map (~> 1.20211102.0)
+    - abseil/memory (~> 1.20211102.0)
+    - abseil/meta (~> 1.20211102.0)
+    - abseil/strings/strings (~> 1.20211102.0)
+    - abseil/time (~> 1.20211102.0)
+    - abseil/types (~> 1.20211102.0)
+    - FirebaseCore (~> 10.0)
+    - "gRPC-C++ (~> 1.44.0)"
+    - leveldb-library (~> 1.22)
+    - nanopb (< 2.30910.0, >= 2.30908.0)
+  - FirebaseInstallations (10.5.0):
+    - FirebaseCore (~> 10.0)
+    - GoogleUtilities/Environment (~> 7.8)
+    - GoogleUtilities/UserDefaults (~> 7.8)
+    - PromisesObjC (~> 2.1)
+  - GKPhotoBrowser (2.4.4):
+    - GKPhotoBrowser/SD (= 2.4.4)
+  - GKPhotoBrowser/Core (2.4.4)
+  - GKPhotoBrowser/SD (2.4.4):
+    - GKPhotoBrowser/Core
+    - SDWebImage (~> 5.0)
+  - GoogleAppMeasurement (10.5.0):
+    - GoogleAppMeasurement/AdIdSupport (= 10.5.0)
+    - GoogleUtilities/AppDelegateSwizzler (~> 7.8)
+    - GoogleUtilities/MethodSwizzler (~> 7.8)
+    - GoogleUtilities/Network (~> 7.8)
+    - "GoogleUtilities/NSData+zlib (~> 7.8)"
+    - nanopb (< 2.30910.0, >= 2.30908.0)
+  - GoogleAppMeasurement/AdIdSupport (10.5.0):
+    - GoogleAppMeasurement/WithoutAdIdSupport (= 10.5.0)
+    - GoogleUtilities/AppDelegateSwizzler (~> 7.8)
+    - GoogleUtilities/MethodSwizzler (~> 7.8)
+    - GoogleUtilities/Network (~> 7.8)
+    - "GoogleUtilities/NSData+zlib (~> 7.8)"
+    - nanopb (< 2.30910.0, >= 2.30908.0)
+  - GoogleAppMeasurement/WithoutAdIdSupport (10.5.0):
+    - GoogleUtilities/AppDelegateSwizzler (~> 7.8)
+    - GoogleUtilities/MethodSwizzler (~> 7.8)
+    - GoogleUtilities/Network (~> 7.8)
+    - "GoogleUtilities/NSData+zlib (~> 7.8)"
+    - nanopb (< 2.30910.0, >= 2.30908.0)
+  - GooglePlaces (6.2.1)
+  - GoogleSignIn (7.0.0):
+    - AppAuth (~> 1.5)
+    - GTMAppAuth (< 3.0, >= 1.3)
+    - GTMSessionFetcher/Core (< 4.0, >= 1.1)
+  - GoogleUtilities/AppDelegateSwizzler (7.11.0):
+    - GoogleUtilities/Environment
+    - GoogleUtilities/Logger
+    - GoogleUtilities/Network
+  - GoogleUtilities/Environment (7.11.0):
+    - PromisesObjC (< 3.0, >= 1.2)
+  - GoogleUtilities/Logger (7.11.0):
+    - GoogleUtilities/Environment
+  - GoogleUtilities/MethodSwizzler (7.11.0):
+    - GoogleUtilities/Logger
+  - GoogleUtilities/Network (7.11.0):
+    - GoogleUtilities/Logger
+    - "GoogleUtilities/NSData+zlib"
+    - GoogleUtilities/Reachability
+  - "GoogleUtilities/NSData+zlib (7.11.0)"
+  - GoogleUtilities/Reachability (7.11.0):
+    - GoogleUtilities/Logger
+  - GoogleUtilities/UserDefaults (7.11.0):
+    - GoogleUtilities/Logger
+  - "gRPC-C++ (1.44.0)":
+    - "gRPC-C++/Implementation (= 1.44.0)"
+    - "gRPC-C++/Interface (= 1.44.0)"
+  - "gRPC-C++/Implementation (1.44.0)":
+    - abseil/base/base (= 1.20211102.0)
+    - abseil/base/core_headers (= 1.20211102.0)
+    - abseil/container/flat_hash_map (= 1.20211102.0)
+    - abseil/container/inlined_vector (= 1.20211102.0)
+    - abseil/functional/bind_front (= 1.20211102.0)
+    - abseil/hash/hash (= 1.20211102.0)
+    - abseil/memory/memory (= 1.20211102.0)
+    - abseil/random/random (= 1.20211102.0)
+    - abseil/status/status (= 1.20211102.0)
+    - abseil/status/statusor (= 1.20211102.0)
+    - abseil/strings/cord (= 1.20211102.0)
+    - abseil/strings/str_format (= 1.20211102.0)
+    - abseil/strings/strings (= 1.20211102.0)
+    - abseil/synchronization/synchronization (= 1.20211102.0)
+    - abseil/time/time (= 1.20211102.0)
+    - abseil/types/optional (= 1.20211102.0)
+    - abseil/types/variant (= 1.20211102.0)
+    - abseil/utility/utility (= 1.20211102.0)
+    - "gRPC-C++/Interface (= 1.44.0)"
+    - gRPC-Core (= 1.44.0)
+  - "gRPC-C++/Interface (1.44.0)"
+  - gRPC-Core (1.44.0):
+    - gRPC-Core/Implementation (= 1.44.0)
+    - gRPC-Core/Interface (= 1.44.0)
+  - gRPC-Core/Implementation (1.44.0):
+    - abseil/base/base (= 1.20211102.0)
+    - abseil/base/core_headers (= 1.20211102.0)
+    - abseil/container/flat_hash_map (= 1.20211102.0)
+    - abseil/container/inlined_vector (= 1.20211102.0)
+    - abseil/functional/bind_front (= 1.20211102.0)
+    - abseil/hash/hash (= 1.20211102.0)
+    - abseil/memory/memory (= 1.20211102.0)
+    - abseil/random/random (= 1.20211102.0)
+    - abseil/status/status (= 1.20211102.0)
+    - abseil/status/statusor (= 1.20211102.0)
+    - abseil/strings/cord (= 1.20211102.0)
+    - abseil/strings/str_format (= 1.20211102.0)
+    - abseil/strings/strings (= 1.20211102.0)
+    - abseil/synchronization/synchronization (= 1.20211102.0)
+    - abseil/time/time (= 1.20211102.0)
+    - abseil/types/optional (= 1.20211102.0)
+    - abseil/types/variant (= 1.20211102.0)
+    - abseil/utility/utility (= 1.20211102.0)
+    - BoringSSL-GRPC (= 0.0.24)
+    - gRPC-Core/Interface (= 1.44.0)
+    - Libuv-gRPC (= 0.0.10)
+  - gRPC-Core/Interface (1.44.0)
+  - GTMAppAuth (2.0.0):
+    - AppAuth/Core (~> 1.6)
+    - GTMSessionFetcher/Core (< 4.0, >= 1.5)
+  - GTMSessionFetcher/Core (3.1.0)
+  - HCSStarRatingView (1.5)
+  - IQKeyboardManager (6.5.11)
+  - KlarnaMobileSDK (2.5.0):
+    - KlarnaMobileSDK/full (= 2.5.0)
+  - KlarnaMobileSDK/full (2.5.0)
+  - leveldb-library (1.22.1)
+  - Libuv-gRPC (0.0.10):
+    - Libuv-gRPC/Implementation (= 0.0.10)
+    - Libuv-gRPC/Interface (= 0.0.10)
+  - Libuv-gRPC/Implementation (0.0.10):
+    - Libuv-gRPC/Interface (= 0.0.10)
+  - Libuv-gRPC/Interface (0.0.10)
+  - Masonry (1.1.0)
+  - MBProgressHUD (1.2.0)
+  - MJExtension (3.4.1)
+  - MJRefresh (3.7.5)
+  - nanopb (2.30909.0):
+    - nanopb/decode (= 2.30909.0)
+    - nanopb/encode (= 2.30909.0)
+  - nanopb/decode (2.30909.0)
+  - nanopb/encode (2.30909.0)
+  - OneSignalXCFramework (3.12.3):
+    - OneSignalXCFramework/OneSignalCore (= 3.12.3)
+    - OneSignalXCFramework/OneSignalExtension (= 3.12.3)
+    - OneSignalXCFramework/OneSignalOutcomes (= 3.12.3)
+  - OneSignalXCFramework/OneSignalCore (3.12.3)
+  - OneSignalXCFramework/OneSignalExtension (3.12.3):
+    - OneSignalXCFramework/OneSignalCore
+    - OneSignalXCFramework/OneSignalOutcomes
+  - OneSignalXCFramework/OneSignalOutcomes (3.12.3):
+    - OneSignalXCFramework/OneSignalCore
+  - PPBadgeView (3.1.0)
+  - PromisesObjC (2.2.0)
+  - Reachability (3.2)
+  - SDWebImage (5.15.3):
+    - SDWebImage/Core (= 5.15.3)
+  - SDWebImage/Core (5.15.3)
+  - Toast (4.0.0)
+  - YYKit (1.0.9):
+    - YYKit/no-arc (= 1.0.9)
+  - YYKit/no-arc (1.0.9)
+
+DEPENDENCIES:
+  - AFNetworking
+  - BraintreeDropIn
+  - Bugly
+  - FBSDKLoginKit
+  - FirebaseAnalytics
+  - FirebaseCore
+  - FirebaseFirestore
+  - GKPhotoBrowser
+  - GooglePlaces
+  - GoogleSignIn
+  - HCSStarRatingView (~> 1.5)
+  - IQKeyboardManager
+  - KlarnaMobileSDK
+  - Masonry
+  - MBProgressHUD
+  - MJExtension
+  - MJRefresh
+  - OneSignalXCFramework (< 4.0, >= 3.0.0)
+  - PPBadgeView
+  - Reachability
+  - SDWebImage
+  - Toast
+  - YYKit
+
+SPEC REPOS:
+  trunk:
+    - abseil
+    - AFNetworking
+    - AppAuth
+    - BoringSSL-GRPC
+    - Braintree
+    - BraintreeDropIn
+    - Bugly
+    - FBAEMKit
+    - FBSDKCoreKit
+    - FBSDKCoreKit_Basics
+    - FBSDKLoginKit
+    - FirebaseAnalytics
+    - FirebaseCore
+    - FirebaseCoreInternal
+    - FirebaseFirestore
+    - FirebaseInstallations
+    - GKPhotoBrowser
+    - GoogleAppMeasurement
+    - GooglePlaces
+    - GoogleSignIn
+    - GoogleUtilities
+    - "gRPC-C++"
+    - gRPC-Core
+    - GTMAppAuth
+    - GTMSessionFetcher
+    - HCSStarRatingView
+    - IQKeyboardManager
+    - KlarnaMobileSDK
+    - leveldb-library
+    - Libuv-gRPC
+    - Masonry
+    - MBProgressHUD
+    - MJExtension
+    - MJRefresh
+    - nanopb
+    - OneSignalXCFramework
+    - PPBadgeView
+    - PromisesObjC
+    - Reachability
+    - SDWebImage
+    - Toast
+    - YYKit
+
+SPEC CHECKSUMS:
+  abseil: ebe5b5529fb05d93a8bdb7951607be08b7fa71bc
+  AFNetworking: 3bd23d814e976cd148d7d44c3ab78017b744cd58
+  AppAuth: 8fca6b5563a5baef2c04bee27538025e4ceb2add
+  BoringSSL-GRPC: 3175b25143e648463a56daeaaa499c6cb86dad33
+  Braintree: 4a27d741d164591ac87cecfaa9a02adb8eb92422
+  BraintreeDropIn: 19d75b5aa0798224fa0501f9b362af54514b0736
+  Bugly: b8715e6ec4004b7f7fbffab0643ba80545aee3da
+  FBAEMKit: 7fb5a0b5caf2ed2900e29c3a17de92ea7193a247
+  FBSDKCoreKit: 2a77418391aaa5da38ebf57b90b6de42cebcce6a
+  FBSDKCoreKit_Basics: 65c5b3146f38705b95338b54f68ea086bcc468dd
+  FBSDKLoginKit: 1a0deda07b1136beb0d468bf154393de6c16e291
+  FirebaseAnalytics: 6f7430030cb6b22fe1db2e3bed782e999b76dc00
+  FirebaseCore: 324b8d182d9ff7e3f6d1fa2f04b082d1c7a3e366
+  FirebaseCoreInternal: e463f41bb935cd049505bf7e9a5bdd7dcea90df6
+  FirebaseFirestore: 7785ee9fe192f736fdb9f5d14a451ba0b33c3005
+  FirebaseInstallations: 935bc4abb6f7a035cab7a0c31cb777b2be3dd254
+  GKPhotoBrowser: 537fce685f6b9085d4a30b68d9fe0b4e4447d6e9
+  GoogleAppMeasurement: 40c70a7d89013f0eca72006c4b9732163ea4cdae
+  GooglePlaces: 94974aa119573d5acc2a35a699948dac838abd73
+  GoogleSignIn: b232380cf495a429b8095d3178a8d5855b42e842
+  GoogleUtilities: c2bdc4cf2ce786c4d2e6b3bcfd599a25ca78f06f
+  "gRPC-C++": 9675f953ace2b3de7c506039d77be1f2e77a8db2
+  gRPC-Core: 943e491cb0d45598b0b0eb9e910c88080369290b
+  GTMAppAuth: 99fb010047ba3973b7026e45393f51f27ab965ae
+  GTMSessionFetcher: c9e714f7eec91a55641e2bab9f45fd83a219b882
+  HCSStarRatingView: 1d18f79654735514cd6f00e6d90e38cb6320dc31
+  IQKeyboardManager: ef43ce1ba1e5aaf4adf222c0a46f39761f246879
+  KlarnaMobileSDK: 64129a13adf206fdcc5f528f32d7564565674975
+  leveldb-library: 50c7b45cbd7bf543c81a468fe557a16ae3db8729
+  Libuv-gRPC: 55e51798e14ef436ad9bc45d12d43b77b49df378
+  Masonry: 678fab65091a9290e40e2832a55e7ab731aad201
+  MBProgressHUD: 3ee5efcc380f6a79a7cc9b363dd669c5e1ae7406
+  MJExtension: 21c5f6f8c4d5d8844b7ae8fbae08fed0b501f961
+  MJRefresh: fdf5e979eb406a0341468932d1dfc8b7f9fce961
+  nanopb: b552cce312b6c8484180ef47159bc0f65a1f0431
+  OneSignalXCFramework: 75844c29607ca95e6176f6f21257b4382c7fdbfb
+  PPBadgeView: b50a223638970fd0781e8753250385864b6dd2fe
+  PromisesObjC: 09985d6d70fbe7878040aa746d78236e6946d2ef
+  Reachability: 33e18b67625424e47b6cde6d202dce689ad7af96
+  SDWebImage: 302d4e14efff86b36b5f36d1bf891b635436d071
+  Toast: 91b396c56ee72a5790816f40d3a94dd357abc196
+  YYKit: 7cda43304a8dc3696c449041e2cb3107b4e236e7
+
+PODFILE CHECKSUM: dddc3c73bedc89d13258ed6a6bbf0d6fbb26ad6b
+
+COCOAPODS: 1.12.0

Pods/AFNetworking/AFNetworking/AFCompatibilityMacros.h

@@ -0,0 +1,49 @@
+// AFCompatibilityMacros.h
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef AFCompatibilityMacros_h
+#define AFCompatibilityMacros_h
+
+#ifdef API_AVAILABLE
+    #define AF_API_AVAILABLE(...) API_AVAILABLE(__VA_ARGS__)
+#else
+    #define AF_API_AVAILABLE(...)
+#endif // API_AVAILABLE
+
+#ifdef API_UNAVAILABLE
+    #define AF_API_UNAVAILABLE(...) API_UNAVAILABLE(__VA_ARGS__)
+#else
+    #define AF_API_UNAVAILABLE(...)
+#endif // API_UNAVAILABLE
+
+#if __has_warning("-Wunguarded-availability-new")
+    #define AF_CAN_USE_AT_AVAILABLE 1
+#else
+    #define AF_CAN_USE_AT_AVAILABLE 0
+#endif
+
+#if ((__IPHONE_OS_VERSION_MAX_ALLOWED && __IPHONE_OS_VERSION_MAX_ALLOWED < 100000) || (__MAC_OS_VERSION_MAX_ALLOWED && __MAC_OS_VERSION_MAX_ALLOWED < 101200) ||(__WATCH_OS_MAX_VERSION_ALLOWED && __WATCH_OS_MAX_VERSION_ALLOWED < 30000) ||(__TV_OS_MAX_VERSION_ALLOWED && __TV_OS_MAX_VERSION_ALLOWED < 100000))
+    #define AF_CAN_INCLUDE_SESSION_TASK_METRICS 0
+#else
+    #define AF_CAN_INCLUDE_SESSION_TASK_METRICS 1
+#endif
+
+#endif /* AFCompatibilityMacros_h */

Pods/AFNetworking/AFNetworking/AFHTTPSessionManager.h

@@ -0,0 +1,285 @@
+// AFHTTPSessionManager.h
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <Foundation/Foundation.h>
+#if !TARGET_OS_WATCH
+#import <SystemConfiguration/SystemConfiguration.h>
+#endif
+#import <TargetConditionals.h>
+
+#import "AFURLSessionManager.h"
+
+/**
+ `AFHTTPSessionManager` is a subclass of `AFURLSessionManager` with convenience methods for making HTTP requests. When a `baseURL` is provided, requests made with the `GET` / `POST` / et al. convenience methods can be made with relative paths.
+
+ ## Subclassing Notes
+
+ Developers targeting iOS 7 or Mac OS X 10.9 or later that deal extensively with a web service are encouraged to subclass `AFHTTPSessionManager`, providing a class method that returns a shared singleton object on which authentication and other configuration can be shared across the application.
+
+ ## Methods to Override
+
+ To change the behavior of all data task operation construction, which is also used in the `GET` / `POST` / et al. convenience methods, override `dataTaskWithRequest:uploadProgress:downloadProgress:completionHandler:`.
+
+ ## Serialization
+
+ Requests created by an HTTP client will contain default headers and encode parameters according to the `requestSerializer` property, which is an object conforming to `<AFURLRequestSerialization>`.
+
+ Responses received from the server are automatically validated and serialized by the `responseSerializers` property, which is an object conforming to `<AFURLResponseSerialization>`
+
+ ## URL Construction Using Relative Paths
+
+ For HTTP convenience methods, the request serializer constructs URLs from the path relative to the `-baseURL`, using `NSURL +URLWithString:relativeToURL:`, when provided. If `baseURL` is `nil`, `path` needs to resolve to a valid `NSURL` object using `NSURL +URLWithString:`.
+
+ Below are a few examples of how `baseURL` and relative paths interact:
+
+    NSURL *baseURL = [NSURL URLWithString:@"http://example.com/v1/"];
+    [NSURL URLWithString:@"foo" relativeToURL:baseURL];                  // http://example.com/v1/foo
+    [NSURL URLWithString:@"foo?bar=baz" relativeToURL:baseURL];          // http://example.com/v1/foo?bar=baz
+    [NSURL URLWithString:@"/foo" relativeToURL:baseURL];                 // http://example.com/foo
+    [NSURL URLWithString:@"foo/" relativeToURL:baseURL];                 // http://example.com/v1/foo
+    [NSURL URLWithString:@"/foo/" relativeToURL:baseURL];                // http://example.com/foo/
+    [NSURL URLWithString:@"http://example2.com/" relativeToURL:baseURL]; // http://example2.com/
+
+ Also important to note is that a trailing slash will be added to any `baseURL` without one. This would otherwise cause unexpected behavior when constructing URLs using paths without a leading slash.
+
+ @warning Managers for background sessions must be owned for the duration of their use. This can be accomplished by creating an application-wide or shared singleton instance.
+ */
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface AFHTTPSessionManager : AFURLSessionManager <NSSecureCoding, NSCopying>
+
+/**
+ The URL used to construct requests from relative paths in methods like `requestWithMethod:URLString:parameters:`, and the `GET` / `POST` / et al. convenience methods.
+ */
+@property (readonly, nonatomic, strong, nullable) NSURL *baseURL;
+
+/**
+ Requests created with `requestWithMethod:URLString:parameters:` & `multipartFormRequestWithMethod:URLString:parameters:constructingBodyWithBlock:` are constructed with a set of default headers using a parameter serialization specified by this property. By default, this is set to an instance of `AFHTTPRequestSerializer`, which serializes query string parameters for `GET`, `HEAD`, and `DELETE` requests, or otherwise URL-form-encodes HTTP message bodies.
+
+ @warning `requestSerializer` must not be `nil`.
+ */
+@property (nonatomic, strong) AFHTTPRequestSerializer <AFURLRequestSerialization> * requestSerializer;
+
+/**
+ Responses sent from the server in data tasks created with `dataTaskWithRequest:success:failure:` and run using the `GET` / `POST` / et al. convenience methods are automatically validated and serialized by the response serializer. By default, this property is set to an instance of `AFJSONResponseSerializer`.
+
+ @warning `responseSerializer` must not be `nil`.
+ */
+@property (nonatomic, strong) AFHTTPResponseSerializer <AFURLResponseSerialization> * responseSerializer;
+
+///-------------------------------
+/// @name Managing Security Policy
+///-------------------------------
+
+/**
+ The security policy used by created session to evaluate server trust for secure connections. `AFURLSessionManager` uses the `defaultPolicy` unless otherwise specified. A security policy configured with `AFSSLPinningModePublicKey` or `AFSSLPinningModeCertificate` can only be applied on a session manager initialized with a secure base URL (i.e. https). Applying a security policy with pinning enabled on an insecure session manager throws an `Invalid Security Policy` exception.
+ */
+@property (nonatomic, strong) AFSecurityPolicy *securityPolicy;
+
+///---------------------
+/// @name Initialization
+///---------------------
+
+/**
+ Creates and returns an `AFHTTPSessionManager` object.
+ */
++ (instancetype)manager;
+
+/**
+ Initializes an `AFHTTPSessionManager` object with the specified base URL.
+
+ @param url The base URL for the HTTP client.
+
+ @return The newly-initialized HTTP client
+ */
+- (instancetype)initWithBaseURL:(nullable NSURL *)url;
+
+/**
+ Initializes an `AFHTTPSessionManager` object with the specified base URL.
+
+ This is the designated initializer.
+
+ @param url The base URL for the HTTP client.
+ @param configuration The configuration used to create the managed session.
+
+ @return The newly-initialized HTTP client
+ */
+- (instancetype)initWithBaseURL:(nullable NSURL *)url
+           sessionConfiguration:(nullable NSURLSessionConfiguration *)configuration NS_DESIGNATED_INITIALIZER;
+
+///---------------------------
+/// @name Making HTTP Requests
+///---------------------------
+
+/**
+ Creates and runs an `NSURLSessionDataTask` with a `GET` request.
+ 
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param headers The headers appended to the default headers for this request.
+ @param downloadProgress A block object to be executed when the download progress is updated. Note this block is called on the session queue, not the main queue.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes two arguments: the data task, and the response object created by the client response serializer.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+ 
+ @see -dataTaskWithRequest:uploadProgress:downloadProgress:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)GET:(NSString *)URLString
+                            parameters:(nullable id)parameters
+                               headers:(nullable NSDictionary <NSString *, NSString *> *)headers
+                              progress:(nullable void (^)(NSProgress *downloadProgress))downloadProgress
+                               success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                               failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure;
+
+/**
+ Creates and runs an `NSURLSessionDataTask` with a `HEAD` request.
+ 
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param headers The headers appended to the default headers for this request.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes a single arguments: the data task.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+ 
+ @see -dataTaskWithRequest:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)HEAD:(NSString *)URLString
+                             parameters:(nullable id)parameters
+                                headers:(nullable NSDictionary <NSString *, NSString *> *)headers
+                                success:(nullable void (^)(NSURLSessionDataTask *task))success
+                                failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure;
+
+/**
+ Creates and runs an `NSURLSessionDataTask` with a `POST` request.
+ 
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param headers The headers appended to the default headers for this request.
+ @param uploadProgress A block object to be executed when the upload progress is updated. Note this block is called on the session queue, not the main queue.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes two arguments: the data task, and the response object created by the client response serializer.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+ 
+ @see -dataTaskWithRequest:uploadProgress:downloadProgress:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)POST:(NSString *)URLString
+                             parameters:(nullable id)parameters
+                                headers:(nullable NSDictionary <NSString *, NSString *> *)headers
+                               progress:(nullable void (^)(NSProgress *uploadProgress))uploadProgress
+                                success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                                failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure;
+
+/**
+ Creates and runs an `NSURLSessionDataTask` with a multipart `POST` request.
+ 
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param headers The headers appended to the default headers for this request.
+ @param block A block that takes a single argument and appends data to the HTTP body. The block argument is an object adopting the `AFMultipartFormData` protocol.
+ @param uploadProgress A block object to be executed when the upload progress is updated. Note this block is called on the session queue, not the main queue.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes two arguments: the data task, and the response object created by the client response serializer.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+ 
+ @see -dataTaskWithRequest:uploadProgress:downloadProgress:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)POST:(NSString *)URLString
+                             parameters:(nullable id)parameters
+                                headers:(nullable NSDictionary <NSString *, NSString *> *)headers
+              constructingBodyWithBlock:(nullable void (^)(id <AFMultipartFormData> formData))block
+                               progress:(nullable void (^)(NSProgress *uploadProgress))uploadProgress
+                                success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                                failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure;
+
+/**
+ Creates and runs an `NSURLSessionDataTask` with a `PUT` request.
+ 
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param headers The headers appended to the default headers for this request.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes two arguments: the data task, and the response object created by the client response serializer.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+ 
+ @see -dataTaskWithRequest:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)PUT:(NSString *)URLString
+                            parameters:(nullable id)parameters
+                               headers:(nullable NSDictionary <NSString *, NSString *> *)headers
+                               success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                               failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure;
+
+/**
+ Creates and runs an `NSURLSessionDataTask` with a `PATCH` request.
+ 
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param headers The headers appended to the default headers for this request.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes two arguments: the data task, and the response object created by the client response serializer.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+ 
+ @see -dataTaskWithRequest:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)PATCH:(NSString *)URLString
+                              parameters:(nullable id)parameters
+                                 headers:(nullable NSDictionary <NSString *, NSString *> *)headers
+                                 success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                                 failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure;
+
+/**
+ Creates and runs an `NSURLSessionDataTask` with a `DELETE` request.
+ 
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param headers The headers appended to the default headers for this request.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes two arguments: the data task, and the response object created by the client response serializer.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+ 
+ @see -dataTaskWithRequest:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)DELETE:(NSString *)URLString
+                               parameters:(nullable id)parameters
+                                  headers:(nullable NSDictionary <NSString *, NSString *> *)headers
+                                  success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                                  failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure;
+
+/**
+ Creates an `NSURLSessionDataTask` with a custom `HTTPMethod` request.
+
+ @param method The HTTPMethod string used to create the request.
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param headers The headers appended to the default headers for this request.
+ @param uploadProgress A block object to be executed when the upload progress is updated. Note this block is called on the session queue, not the main queue.
+ @param downloadProgress A block object to be executed when the download progress is updated. Note this block is called on the session queue, not the main queue.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes two arguments: the data task, and the response object created by the client response serializer.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+
+ @see -dataTaskWithRequest:uploadProgress:downloadProgress:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)dataTaskWithHTTPMethod:(NSString *)method
+                                                URLString:(NSString *)URLString
+                                               parameters:(nullable id)parameters
+                                                  headers:(nullable NSDictionary <NSString *, NSString *> *)headers
+                                           uploadProgress:(nullable void (^)(NSProgress *uploadProgress))uploadProgress
+                                         downloadProgress:(nullable void (^)(NSProgress *downloadProgress))downloadProgress
+                                                  success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                                                  failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/AFNetworking/AFNetworking/AFHTTPSessionManager.m

@@ -0,0 +1,357 @@
+// AFHTTPSessionManager.m
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import "AFHTTPSessionManager.h"
+
+#import "AFURLRequestSerialization.h"
+#import "AFURLResponseSerialization.h"
+
+#import <Availability.h>
+#import <TargetConditionals.h>
+#import <Security/Security.h>
+
+#import <netinet/in.h>
+#import <netinet6/in6.h>
+#import <arpa/inet.h>
+#import <ifaddrs.h>
+#import <netdb.h>
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+#import <UIKit/UIKit.h>
+#elif TARGET_OS_WATCH
+#import <WatchKit/WatchKit.h>
+#endif
+
+@interface AFHTTPSessionManager ()
+@property (readwrite, nonatomic, strong) NSURL *baseURL;
+@end
+
+@implementation AFHTTPSessionManager
+@dynamic responseSerializer;
+
++ (instancetype)manager {
+    return [[[self class] alloc] initWithBaseURL:nil];
+}
+
+- (instancetype)init {
+    return [self initWithBaseURL:nil];
+}
+
+- (instancetype)initWithBaseURL:(NSURL *)url {
+    return [self initWithBaseURL:url sessionConfiguration:nil];
+}
+
+- (instancetype)initWithSessionConfiguration:(NSURLSessionConfiguration *)configuration {
+    return [self initWithBaseURL:nil sessionConfiguration:configuration];
+}
+
+- (instancetype)initWithBaseURL:(NSURL *)url
+           sessionConfiguration:(NSURLSessionConfiguration *)configuration
+{
+    self = [super initWithSessionConfiguration:configuration];
+    if (!self) {
+        return nil;
+    }
+
+    // Ensure terminal slash for baseURL path, so that NSURL +URLWithString:relativeToURL: works as expected
+    if ([[url path] length] > 0 && ![[url absoluteString] hasSuffix:@"/"]) {
+        url = [url URLByAppendingPathComponent:@""];
+    }
+
+    self.baseURL = url;
+
+    self.requestSerializer = [AFHTTPRequestSerializer serializer];
+    self.responseSerializer = [AFJSONResponseSerializer serializer];
+
+    return self;
+}
+
+#pragma mark -
+
+- (void)setRequestSerializer:(AFHTTPRequestSerializer <AFURLRequestSerialization> *)requestSerializer {
+    NSParameterAssert(requestSerializer);
+
+    _requestSerializer = requestSerializer;
+}
+
+- (void)setResponseSerializer:(AFHTTPResponseSerializer <AFURLResponseSerialization> *)responseSerializer {
+    NSParameterAssert(responseSerializer);
+
+    [super setResponseSerializer:responseSerializer];
+}
+
+@dynamic securityPolicy;
+
+- (void)setSecurityPolicy:(AFSecurityPolicy *)securityPolicy {
+    if (securityPolicy.SSLPinningMode != AFSSLPinningModeNone && ![self.baseURL.scheme isEqualToString:@"https"]) {
+        NSString *pinningMode = @"Unknown Pinning Mode";
+        switch (securityPolicy.SSLPinningMode) {
+            case AFSSLPinningModeNone:        pinningMode = @"AFSSLPinningModeNone"; break;
+            case AFSSLPinningModeCertificate: pinningMode = @"AFSSLPinningModeCertificate"; break;
+            case AFSSLPinningModePublicKey:   pinningMode = @"AFSSLPinningModePublicKey"; break;
+        }
+        NSString *reason = [NSString stringWithFormat:@"A security policy configured with `%@` can only be applied on a manager with a secure base URL (i.e. https)", pinningMode];
+        @throw [NSException exceptionWithName:@"Invalid Security Policy" reason:reason userInfo:nil];
+    }
+
+    [super setSecurityPolicy:securityPolicy];
+}
+
+#pragma mark -
+
+- (NSURLSessionDataTask *)GET:(NSString *)URLString
+                   parameters:(nullable id)parameters
+                      headers:(nullable NSDictionary <NSString *, NSString *> *)headers
+                     progress:(nullable void (^)(NSProgress * _Nonnull))downloadProgress
+                      success:(nullable void (^)(NSURLSessionDataTask * _Nonnull, id _Nullable))success
+                      failure:(nullable void (^)(NSURLSessionDataTask * _Nullable, NSError * _Nonnull))failure
+{
+    
+    NSURLSessionDataTask *dataTask = [self dataTaskWithHTTPMethod:@"GET"
+                                                        URLString:URLString
+                                                       parameters:parameters
+                                                          headers:headers
+                                                   uploadProgress:nil
+                                                 downloadProgress:downloadProgress
+                                                          success:success
+                                                          failure:failure];
+    
+    [dataTask resume];
+    
+    return dataTask;
+}
+
+- (NSURLSessionDataTask *)HEAD:(NSString *)URLString
+                    parameters:(nullable id)parameters
+                       headers:(nullable NSDictionary<NSString *,NSString *> *)headers
+                       success:(nullable void (^)(NSURLSessionDataTask * _Nonnull))success
+                       failure:(nullable void (^)(NSURLSessionDataTask * _Nullable, NSError * _Nonnull))failure
+{
+    NSURLSessionDataTask *dataTask = [self dataTaskWithHTTPMethod:@"HEAD" URLString:URLString parameters:parameters headers:headers uploadProgress:nil downloadProgress:nil success:^(NSURLSessionDataTask *task, __unused id responseObject) {
+        if (success) {
+            success(task);
+        }
+    } failure:failure];
+    
+    [dataTask resume];
+    
+    return dataTask;
+}
+
+- (nullable NSURLSessionDataTask *)POST:(NSString *)URLString
+                             parameters:(nullable id)parameters
+                                headers:(nullable NSDictionary <NSString *, NSString *> *)headers
+                               progress:(nullable void (^)(NSProgress *uploadProgress))uploadProgress
+                                success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                                failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure
+{
+    NSURLSessionDataTask *dataTask = [self dataTaskWithHTTPMethod:@"POST" URLString:URLString parameters:parameters headers:headers uploadProgress:uploadProgress downloadProgress:nil success:success failure:failure];
+    
+    [dataTask resume];
+    
+    return dataTask;
+}
+
+- (NSURLSessionDataTask *)POST:(NSString *)URLString
+                    parameters:(nullable id)parameters
+                       headers:(nullable NSDictionary<NSString *,NSString *> *)headers
+     constructingBodyWithBlock:(nullable void (^)(id<AFMultipartFormData> _Nonnull))block
+                      progress:(nullable void (^)(NSProgress * _Nonnull))uploadProgress
+                       success:(nullable void (^)(NSURLSessionDataTask * _Nonnull, id _Nullable))success failure:(void (^)(NSURLSessionDataTask * _Nullable, NSError * _Nonnull))failure
+{
+    NSError *serializationError = nil;
+    NSMutableURLRequest *request = [self.requestSerializer multipartFormRequestWithMethod:@"POST" URLString:[[NSURL URLWithString:URLString relativeToURL:self.baseURL] absoluteString] parameters:parameters constructingBodyWithBlock:block error:&serializationError];
+    for (NSString *headerField in headers.keyEnumerator) {
+        [request setValue:headers[headerField] forHTTPHeaderField:headerField];
+    }
+    if (serializationError) {
+        if (failure) {
+            dispatch_async(self.completionQueue ?: dispatch_get_main_queue(), ^{
+                failure(nil, serializationError);
+            });
+        }
+        
+        return nil;
+    }
+    
+    __block NSURLSessionDataTask *task = [self uploadTaskWithStreamedRequest:request progress:uploadProgress completionHandler:^(NSURLResponse * __unused response, id responseObject, NSError *error) {
+        if (error) {
+            if (failure) {
+                failure(task, error);
+            }
+        } else {
+            if (success) {
+                success(task, responseObject);
+            }
+        }
+    }];
+    
+    [task resume];
+    
+    return task;
+}
+
+- (NSURLSessionDataTask *)PUT:(NSString *)URLString
+                   parameters:(nullable id)parameters
+                      headers:(nullable NSDictionary<NSString *,NSString *> *)headers
+                      success:(nullable void (^)(NSURLSessionDataTask *task, id responseObject))success
+                      failure:(nullable void (^)(NSURLSessionDataTask *task, NSError *error))failure
+{
+    NSURLSessionDataTask *dataTask = [self dataTaskWithHTTPMethod:@"PUT" URLString:URLString parameters:parameters headers:headers uploadProgress:nil downloadProgress:nil success:success failure:failure];
+    
+    [dataTask resume];
+    
+    return dataTask;
+}
+
+- (NSURLSessionDataTask *)PATCH:(NSString *)URLString
+                     parameters:(nullable id)parameters
+                        headers:(nullable NSDictionary<NSString *,NSString *> *)headers
+                        success:(nullable void (^)(NSURLSessionDataTask *task, id responseObject))success
+                        failure:(nullable void (^)(NSURLSessionDataTask *task, NSError *error))failure
+{
+    NSURLSessionDataTask *dataTask = [self dataTaskWithHTTPMethod:@"PATCH" URLString:URLString parameters:parameters headers:headers uploadProgress:nil downloadProgress:nil success:success failure:failure];
+    
+    [dataTask resume];
+    
+    return dataTask;
+}
+
+- (NSURLSessionDataTask *)DELETE:(NSString *)URLString
+                      parameters:(nullable id)parameters
+                         headers:(nullable NSDictionary<NSString *,NSString *> *)headers
+                         success:(nullable void (^)(NSURLSessionDataTask *task, id responseObject))success
+                         failure:(nullable void (^)(NSURLSessionDataTask *task, NSError *error))failure
+{
+    NSURLSessionDataTask *dataTask = [self dataTaskWithHTTPMethod:@"DELETE" URLString:URLString parameters:parameters headers:headers uploadProgress:nil downloadProgress:nil success:success failure:failure];
+    
+    [dataTask resume];
+    
+    return dataTask;
+}
+
+
+- (NSURLSessionDataTask *)dataTaskWithHTTPMethod:(NSString *)method
+                                       URLString:(NSString *)URLString
+                                      parameters:(nullable id)parameters
+                                         headers:(nullable NSDictionary <NSString *, NSString *> *)headers
+                                  uploadProgress:(nullable void (^)(NSProgress *uploadProgress)) uploadProgress
+                                downloadProgress:(nullable void (^)(NSProgress *downloadProgress)) downloadProgress
+                                         success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                                         failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure
+{
+    NSError *serializationError = nil;
+    NSMutableURLRequest *request = [self.requestSerializer requestWithMethod:method URLString:[[NSURL URLWithString:URLString relativeToURL:self.baseURL] absoluteString] parameters:parameters error:&serializationError];
+    for (NSString *headerField in headers.keyEnumerator) {
+        [request setValue:headers[headerField] forHTTPHeaderField:headerField];
+    }
+    if (serializationError) {
+        if (failure) {
+            dispatch_async(self.completionQueue ?: dispatch_get_main_queue(), ^{
+                failure(nil, serializationError);
+            });
+        }
+
+        return nil;
+    }
+
+    __block NSURLSessionDataTask *dataTask = nil;
+    dataTask = [self dataTaskWithRequest:request
+                          uploadProgress:uploadProgress
+                        downloadProgress:downloadProgress
+                       completionHandler:^(NSURLResponse * __unused response, id responseObject, NSError *error) {
+        if (error) {
+            if (failure) {
+                failure(dataTask, error);
+            }
+        } else {
+            if (success) {
+                success(dataTask, responseObject);
+            }
+        }
+    }];
+
+    return dataTask;
+}
+
+#pragma mark - NSObject
+
+- (NSString *)description {
+    return [NSString stringWithFormat:@"<%@: %p, baseURL: %@, session: %@, operationQueue: %@>", NSStringFromClass([self class]), self, [self.baseURL absoluteString], self.session, self.operationQueue];
+}
+
+#pragma mark - NSSecureCoding
+
++ (BOOL)supportsSecureCoding {
+    return YES;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    NSURL *baseURL = [decoder decodeObjectOfClass:[NSURL class] forKey:NSStringFromSelector(@selector(baseURL))];
+    NSURLSessionConfiguration *configuration = [decoder decodeObjectOfClass:[NSURLSessionConfiguration class] forKey:@"sessionConfiguration"];
+    if (!configuration) {
+        NSString *configurationIdentifier = [decoder decodeObjectOfClass:[NSString class] forKey:@"identifier"];
+        if (configurationIdentifier) {
+            configuration = [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:configurationIdentifier];
+        }
+    }
+
+    self = [self initWithBaseURL:baseURL sessionConfiguration:configuration];
+    if (!self) {
+        return nil;
+    }
+
+    self.requestSerializer = [decoder decodeObjectOfClass:[AFHTTPRequestSerializer class] forKey:NSStringFromSelector(@selector(requestSerializer))];
+    self.responseSerializer = [decoder decodeObjectOfClass:[AFHTTPResponseSerializer class] forKey:NSStringFromSelector(@selector(responseSerializer))];
+    AFSecurityPolicy *decodedPolicy = [decoder decodeObjectOfClass:[AFSecurityPolicy class] forKey:NSStringFromSelector(@selector(securityPolicy))];
+    if (decodedPolicy) {
+        self.securityPolicy = decodedPolicy;
+    }
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [super encodeWithCoder:coder];
+
+    [coder encodeObject:self.baseURL forKey:NSStringFromSelector(@selector(baseURL))];
+    if ([self.session.configuration conformsToProtocol:@protocol(NSCoding)]) {
+        [coder encodeObject:self.session.configuration forKey:@"sessionConfiguration"];
+    } else {
+        [coder encodeObject:self.session.configuration.identifier forKey:@"identifier"];
+    }
+    [coder encodeObject:self.requestSerializer forKey:NSStringFromSelector(@selector(requestSerializer))];
+    [coder encodeObject:self.responseSerializer forKey:NSStringFromSelector(@selector(responseSerializer))];
+    [coder encodeObject:self.securityPolicy forKey:NSStringFromSelector(@selector(securityPolicy))];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFHTTPSessionManager *HTTPClient = [[[self class] allocWithZone:zone] initWithBaseURL:self.baseURL sessionConfiguration:self.session.configuration];
+
+    HTTPClient.requestSerializer = [self.requestSerializer copyWithZone:zone];
+    HTTPClient.responseSerializer = [self.responseSerializer copyWithZone:zone];
+    HTTPClient.securityPolicy = [self.securityPolicy copyWithZone:zone];
+    return HTTPClient;
+}
+
+@end

Pods/AFNetworking/AFNetworking/AFNetworkReachabilityManager.h

@@ -0,0 +1,216 @@
+// AFNetworkReachabilityManager.h
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <Foundation/Foundation.h>
+
+#if !TARGET_OS_WATCH
+#import <SystemConfiguration/SystemConfiguration.h>
+
+typedef NS_ENUM(NSInteger, AFNetworkReachabilityStatus) {
+    AFNetworkReachabilityStatusUnknown          = -1,
+    AFNetworkReachabilityStatusNotReachable     = 0,
+    AFNetworkReachabilityStatusReachableViaWWAN = 1,
+    AFNetworkReachabilityStatusReachableViaWiFi = 2,
+};
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ `AFNetworkReachabilityManager` monitors the reachability of domains, and addresses for both WWAN and WiFi network interfaces.
+
+ Reachability can be used to determine background information about why a network operation failed, or to trigger a network operation retrying when a connection is established. It should not be used to prevent a user from initiating a network request, as it's possible that an initial request may be required to establish reachability.
+
+ See Apple's Reachability Sample Code ( https://developer.apple.com/library/ios/samplecode/reachability/ )
+
+ @warning Instances of `AFNetworkReachabilityManager` must be started with `-startMonitoring` before reachability status can be determined.
+ */
+@interface AFNetworkReachabilityManager : NSObject
+
+/**
+ The current network reachability status.
+ */
+@property (readonly, nonatomic, assign) AFNetworkReachabilityStatus networkReachabilityStatus;
+
+/**
+ Whether or not the network is currently reachable.
+ */
+@property (readonly, nonatomic, assign, getter = isReachable) BOOL reachable;
+
+/**
+ Whether or not the network is currently reachable via WWAN.
+ */
+@property (readonly, nonatomic, assign, getter = isReachableViaWWAN) BOOL reachableViaWWAN;
+
+/**
+ Whether or not the network is currently reachable via WiFi.
+ */
+@property (readonly, nonatomic, assign, getter = isReachableViaWiFi) BOOL reachableViaWiFi;
+
+///---------------------
+/// @name Initialization
+///---------------------
+
+/**
+ Returns the shared network reachability manager.
+ */
++ (instancetype)sharedManager;
+
+/**
+ Creates and returns a network reachability manager with the default socket address.
+ 
+ @return An initialized network reachability manager, actively monitoring the default socket address.
+ */
++ (instancetype)manager;
+
+/**
+ Creates and returns a network reachability manager for the specified domain.
+
+ @param domain The domain used to evaluate network reachability.
+
+ @return An initialized network reachability manager, actively monitoring the specified domain.
+ */
++ (instancetype)managerForDomain:(NSString *)domain;
+
+/**
+ Creates and returns a network reachability manager for the socket address.
+
+ @param address The socket address (`sockaddr_in6`) used to evaluate network reachability.
+
+ @return An initialized network reachability manager, actively monitoring the specified socket address.
+ */
++ (instancetype)managerForAddress:(const void *)address;
+
+/**
+ Initializes an instance of a network reachability manager from the specified reachability object.
+
+ @param reachability The reachability object to monitor.
+
+ @return An initialized network reachability manager, actively monitoring the specified reachability.
+ */
+- (instancetype)initWithReachability:(SCNetworkReachabilityRef)reachability NS_DESIGNATED_INITIALIZER;
+
+/**
+ *  Unavailable initializer
+ */
++ (instancetype)new NS_UNAVAILABLE;
+
+/**
+ *  Unavailable initializer
+ */
+- (instancetype)init NS_UNAVAILABLE;
+
+///--------------------------------------------------
+/// @name Starting & Stopping Reachability Monitoring
+///--------------------------------------------------
+
+/**
+ Starts monitoring for changes in network reachability status.
+ */
+- (void)startMonitoring;
+
+/**
+ Stops monitoring for changes in network reachability status.
+ */
+- (void)stopMonitoring;
+
+///-------------------------------------------------
+/// @name Getting Localized Reachability Description
+///-------------------------------------------------
+
+/**
+ Returns a localized string representation of the current network reachability status.
+ */
+- (NSString *)localizedNetworkReachabilityStatusString;
+
+///---------------------------------------------------
+/// @name Setting Network Reachability Change Callback
+///---------------------------------------------------
+
+/**
+ Sets a callback to be executed when the network availability of the `baseURL` host changes.
+
+ @param block A block object to be executed when the network availability of the `baseURL` host changes.. This block has no return value and takes a single argument which represents the various reachability states from the device to the `baseURL`.
+ */
+- (void)setReachabilityStatusChangeBlock:(nullable void (^)(AFNetworkReachabilityStatus status))block;
+
+@end
+
+///----------------
+/// @name Constants
+///----------------
+
+/**
+ ## Network Reachability
+
+ The following constants are provided by `AFNetworkReachabilityManager` as possible network reachability statuses.
+
+ enum {
+ AFNetworkReachabilityStatusUnknown,
+ AFNetworkReachabilityStatusNotReachable,
+ AFNetworkReachabilityStatusReachableViaWWAN,
+ AFNetworkReachabilityStatusReachableViaWiFi,
+ }
+
+ `AFNetworkReachabilityStatusUnknown`
+ The `baseURL` host reachability is not known.
+
+ `AFNetworkReachabilityStatusNotReachable`
+ The `baseURL` host cannot be reached.
+
+ `AFNetworkReachabilityStatusReachableViaWWAN`
+ The `baseURL` host can be reached via a cellular connection, such as EDGE or GPRS.
+
+ `AFNetworkReachabilityStatusReachableViaWiFi`
+ The `baseURL` host can be reached via a Wi-Fi connection.
+
+ ### Keys for Notification UserInfo Dictionary
+
+ Strings that are used as keys in a `userInfo` dictionary in a network reachability status change notification.
+
+ `AFNetworkingReachabilityNotificationStatusItem`
+ A key in the userInfo dictionary in a `AFNetworkingReachabilityDidChangeNotification` notification.
+ The corresponding value is an `NSNumber` object representing the `AFNetworkReachabilityStatus` value for the current reachability status.
+ */
+
+///--------------------
+/// @name Notifications
+///--------------------
+
+/**
+ Posted when network reachability changes.
+ This notification assigns no notification object. The `userInfo` dictionary contains an `NSNumber` object under the `AFNetworkingReachabilityNotificationStatusItem` key, representing the `AFNetworkReachabilityStatus` value for the current network reachability.
+
+ @warning In order for network reachability to be monitored, include the `SystemConfiguration` framework in the active target's "Link Binary With Library" build phase, and add `#import <SystemConfiguration/SystemConfiguration.h>` to the header prefix of the project (`Prefix.pch`).
+ */
+FOUNDATION_EXPORT NSString * const AFNetworkingReachabilityDidChangeNotification;
+FOUNDATION_EXPORT NSString * const AFNetworkingReachabilityNotificationStatusItem;
+
+///--------------------
+/// @name Functions
+///--------------------
+
+/**
+ Returns a localized string representation of an `AFNetworkReachabilityStatus` value.
+ */
+FOUNDATION_EXPORT NSString * AFStringFromNetworkReachabilityStatus(AFNetworkReachabilityStatus status);
+
+NS_ASSUME_NONNULL_END
+#endif

Pods/AFNetworking/AFNetworking/AFNetworkReachabilityManager.m

@@ -0,0 +1,269 @@
+// AFNetworkReachabilityManager.m
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import "AFNetworkReachabilityManager.h"
+#if !TARGET_OS_WATCH
+
+#import <netinet/in.h>
+#import <netinet6/in6.h>
+#import <arpa/inet.h>
+#import <ifaddrs.h>
+#import <netdb.h>
+
+NSString * const AFNetworkingReachabilityDidChangeNotification = @"com.alamofire.networking.reachability.change";
+NSString * const AFNetworkingReachabilityNotificationStatusItem = @"AFNetworkingReachabilityNotificationStatusItem";
+
+typedef void (^AFNetworkReachabilityStatusBlock)(AFNetworkReachabilityStatus status);
+typedef AFNetworkReachabilityManager * (^AFNetworkReachabilityStatusCallback)(AFNetworkReachabilityStatus status);
+
+NSString * AFStringFromNetworkReachabilityStatus(AFNetworkReachabilityStatus status) {
+    switch (status) {
+        case AFNetworkReachabilityStatusNotReachable:
+            return NSLocalizedStringFromTable(@"Not Reachable", @"AFNetworking", nil);
+        case AFNetworkReachabilityStatusReachableViaWWAN:
+            return NSLocalizedStringFromTable(@"Reachable via WWAN", @"AFNetworking", nil);
+        case AFNetworkReachabilityStatusReachableViaWiFi:
+            return NSLocalizedStringFromTable(@"Reachable via WiFi", @"AFNetworking", nil);
+        case AFNetworkReachabilityStatusUnknown:
+        default:
+            return NSLocalizedStringFromTable(@"Unknown", @"AFNetworking", nil);
+    }
+}
+
+static AFNetworkReachabilityStatus AFNetworkReachabilityStatusForFlags(SCNetworkReachabilityFlags flags) {
+    BOOL isReachable = ((flags & kSCNetworkReachabilityFlagsReachable) != 0);
+    BOOL needsConnection = ((flags & kSCNetworkReachabilityFlagsConnectionRequired) != 0);
+    BOOL canConnectionAutomatically = (((flags & kSCNetworkReachabilityFlagsConnectionOnDemand ) != 0) || ((flags & kSCNetworkReachabilityFlagsConnectionOnTraffic) != 0));
+    BOOL canConnectWithoutUserInteraction = (canConnectionAutomatically && (flags & kSCNetworkReachabilityFlagsInterventionRequired) == 0);
+    BOOL isNetworkReachable = (isReachable && (!needsConnection || canConnectWithoutUserInteraction));
+
+    AFNetworkReachabilityStatus status = AFNetworkReachabilityStatusUnknown;
+    if (isNetworkReachable == NO) {
+        status = AFNetworkReachabilityStatusNotReachable;
+    }
+#if	TARGET_OS_IPHONE
+    else if ((flags & kSCNetworkReachabilityFlagsIsWWAN) != 0) {
+        status = AFNetworkReachabilityStatusReachableViaWWAN;
+    }
+#endif
+    else {
+        status = AFNetworkReachabilityStatusReachableViaWiFi;
+    }
+
+    return status;
+}
+
+/**
+ * Queue a status change notification for the main thread.
+ *
+ * This is done to ensure that the notifications are received in the same order
+ * as they are sent. If notifications are sent directly, it is possible that
+ * a queued notification (for an earlier status condition) is processed after
+ * the later update, resulting in the listener being left in the wrong state.
+ */
+static void AFPostReachabilityStatusChange(SCNetworkReachabilityFlags flags, AFNetworkReachabilityStatusCallback block) {
+    AFNetworkReachabilityStatus status = AFNetworkReachabilityStatusForFlags(flags);
+    dispatch_async(dispatch_get_main_queue(), ^{
+        AFNetworkReachabilityManager *manager = nil;
+        if (block) {
+            manager = block(status);
+        }
+        NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
+        NSDictionary *userInfo = @{ AFNetworkingReachabilityNotificationStatusItem: @(status) };
+        [notificationCenter postNotificationName:AFNetworkingReachabilityDidChangeNotification object:manager userInfo:userInfo];
+    });
+}
+
+static void AFNetworkReachabilityCallback(SCNetworkReachabilityRef __unused target, SCNetworkReachabilityFlags flags, void *info) {
+    AFPostReachabilityStatusChange(flags, (__bridge AFNetworkReachabilityStatusCallback)info);
+}
+
+
+static const void * AFNetworkReachabilityRetainCallback(const void *info) {
+    return Block_copy(info);
+}
+
+static void AFNetworkReachabilityReleaseCallback(const void *info) {
+    if (info) {
+        Block_release(info);
+    }
+}
+
+@interface AFNetworkReachabilityManager ()
+@property (readonly, nonatomic, assign) SCNetworkReachabilityRef networkReachability;
+@property (readwrite, nonatomic, assign) AFNetworkReachabilityStatus networkReachabilityStatus;
+@property (readwrite, nonatomic, copy) AFNetworkReachabilityStatusBlock networkReachabilityStatusBlock;
+@end
+
+@implementation AFNetworkReachabilityManager
+
++ (instancetype)sharedManager {
+    static AFNetworkReachabilityManager *_sharedManager = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        _sharedManager = [self manager];
+    });
+
+    return _sharedManager;
+}
+
++ (instancetype)managerForDomain:(NSString *)domain {
+    SCNetworkReachabilityRef reachability = SCNetworkReachabilityCreateWithName(kCFAllocatorDefault, [domain UTF8String]);
+
+    AFNetworkReachabilityManager *manager = [[self alloc] initWithReachability:reachability];
+    
+    CFRelease(reachability);
+
+    return manager;
+}
+
++ (instancetype)managerForAddress:(const void *)address {
+    SCNetworkReachabilityRef reachability = SCNetworkReachabilityCreateWithAddress(kCFAllocatorDefault, (const struct sockaddr *)address);
+    AFNetworkReachabilityManager *manager = [[self alloc] initWithReachability:reachability];
+
+    CFRelease(reachability);
+    
+    return manager;
+}
+
++ (instancetype)manager
+{
+#if (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED >= 90000) || (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+    struct sockaddr_in6 address;
+    bzero(&address, sizeof(address));
+    address.sin6_len = sizeof(address);
+    address.sin6_family = AF_INET6;
+#else
+    struct sockaddr_in address;
+    bzero(&address, sizeof(address));
+    address.sin_len = sizeof(address);
+    address.sin_family = AF_INET;
+#endif
+    return [self managerForAddress:&address];
+}
+
+- (instancetype)initWithReachability:(SCNetworkReachabilityRef)reachability {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    _networkReachability = CFRetain(reachability);
+    self.networkReachabilityStatus = AFNetworkReachabilityStatusUnknown;
+
+    return self;
+}
+
+- (instancetype)init
+{
+    @throw [NSException exceptionWithName:NSGenericException
+                                   reason:@"`-init` unavailable. Use `-initWithReachability:` instead"
+                                 userInfo:nil];
+    return nil;
+}
+
+- (void)dealloc {
+    [self stopMonitoring];
+    
+    if (_networkReachability != NULL) {
+        CFRelease(_networkReachability);
+    }
+}
+
+#pragma mark -
+
+- (BOOL)isReachable {
+    return [self isReachableViaWWAN] || [self isReachableViaWiFi];
+}
+
+- (BOOL)isReachableViaWWAN {
+    return self.networkReachabilityStatus == AFNetworkReachabilityStatusReachableViaWWAN;
+}
+
+- (BOOL)isReachableViaWiFi {
+    return self.networkReachabilityStatus == AFNetworkReachabilityStatusReachableViaWiFi;
+}
+
+#pragma mark -
+
+- (void)startMonitoring {
+    [self stopMonitoring];
+
+    if (!self.networkReachability) {
+        return;
+    }
+
+    __weak __typeof(self)weakSelf = self;
+    AFNetworkReachabilityStatusCallback callback = ^(AFNetworkReachabilityStatus status) {
+        __strong __typeof(weakSelf)strongSelf = weakSelf;
+
+        strongSelf.networkReachabilityStatus = status;
+        if (strongSelf.networkReachabilityStatusBlock) {
+            strongSelf.networkReachabilityStatusBlock(status);
+        }
+        
+        return strongSelf;
+    };
+
+    SCNetworkReachabilityContext context = {0, (__bridge void *)callback, AFNetworkReachabilityRetainCallback, AFNetworkReachabilityReleaseCallback, NULL};
+    SCNetworkReachabilitySetCallback(self.networkReachability, AFNetworkReachabilityCallback, &context);
+    SCNetworkReachabilityScheduleWithRunLoop(self.networkReachability, CFRunLoopGetMain(), kCFRunLoopCommonModes);
+
+    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0),^{
+        SCNetworkReachabilityFlags flags;
+        if (SCNetworkReachabilityGetFlags(self.networkReachability, &flags)) {
+            AFPostReachabilityStatusChange(flags, callback);
+        }
+    });
+}
+
+- (void)stopMonitoring {
+    if (!self.networkReachability) {
+        return;
+    }
+
+    SCNetworkReachabilityUnscheduleFromRunLoop(self.networkReachability, CFRunLoopGetMain(), kCFRunLoopCommonModes);
+}
+
+#pragma mark -
+
+- (NSString *)localizedNetworkReachabilityStatusString {
+    return AFStringFromNetworkReachabilityStatus(self.networkReachabilityStatus);
+}
+
+#pragma mark -
+
+- (void)setReachabilityStatusChangeBlock:(void (^)(AFNetworkReachabilityStatus status))block {
+    self.networkReachabilityStatusBlock = block;
+}
+
+#pragma mark - NSKeyValueObserving
+
++ (NSSet *)keyPathsForValuesAffectingValueForKey:(NSString *)key {
+    if ([key isEqualToString:@"reachable"] || [key isEqualToString:@"reachableViaWWAN"] || [key isEqualToString:@"reachableViaWiFi"]) {
+        return [NSSet setWithObject:@"networkReachabilityStatus"];
+    }
+
+    return [super keyPathsForValuesAffectingValueForKey:key];
+}
+
+@end
+#endif

Pods/AFNetworking/AFNetworking/AFNetworking.h

@@ -0,0 +1,41 @@
+// AFNetworking.h
+//
+// Copyright (c) 2013 AFNetworking (http://afnetworking.com/)
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <Foundation/Foundation.h>
+#import <Availability.h>
+#import <TargetConditionals.h>
+
+#ifndef _AFNETWORKING_
+    #define _AFNETWORKING_
+
+    #import "AFURLRequestSerialization.h"
+    #import "AFURLResponseSerialization.h"
+    #import "AFSecurityPolicy.h"
+
+#if !TARGET_OS_WATCH
+    #import "AFNetworkReachabilityManager.h"
+#endif
+
+    #import "AFURLSessionManager.h"
+    #import "AFHTTPSessionManager.h"
+
+#endif /* _AFNETWORKING_ */

Pods/AFNetworking/AFNetworking/AFSecurityPolicy.h

@@ -0,0 +1,161 @@
+// AFSecurityPolicy.h
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <Foundation/Foundation.h>
+#import <Security/Security.h>
+
+typedef NS_ENUM(NSUInteger, AFSSLPinningMode) {
+    AFSSLPinningModeNone,
+    AFSSLPinningModePublicKey,
+    AFSSLPinningModeCertificate,
+};
+
+/**
+ `AFSecurityPolicy` evaluates server trust against pinned X.509 certificates and public keys over secure connections.
+
+ Adding pinned SSL certificates to your app helps prevent man-in-the-middle attacks and other vulnerabilities. Applications dealing with sensitive customer data or financial information are strongly encouraged to route all communication over an HTTPS connection with SSL pinning configured and enabled.
+ */
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface AFSecurityPolicy : NSObject <NSSecureCoding, NSCopying>
+
+/**
+ The criteria by which server trust should be evaluated against the pinned SSL certificates. Defaults to `AFSSLPinningModeNone`.
+ */
+@property (readonly, nonatomic, assign) AFSSLPinningMode SSLPinningMode;
+
+/**
+ The certificates used to evaluate server trust according to the SSL pinning mode. 
+ 
+ Note that if pinning is enabled, `evaluateServerTrust:forDomain:` will return true if any pinned certificate matches.
+
+ @see policyWithPinningMode:withPinnedCertificates:
+ */
+@property (nonatomic, strong, nullable) NSSet <NSData *> *pinnedCertificates;
+
+/**
+ Whether or not to trust servers with an invalid or expired SSL certificates. Defaults to `NO`.
+ */
+@property (nonatomic, assign) BOOL allowInvalidCertificates;
+
+/**
+ Whether or not to validate the domain name in the certificate's CN field. Defaults to `YES`.
+ */
+@property (nonatomic, assign) BOOL validatesDomainName;
+
+///-----------------------------------------
+/// @name Getting Certificates from the Bundle
+///-----------------------------------------
+
+/**
+ Returns any certificates included in the bundle. If you are using AFNetworking as an embedded framework, you must use this method to find the certificates you have included in your app bundle, and use them when creating your security policy by calling `policyWithPinningMode:withPinnedCertificates`.
+
+ @return The certificates included in the given bundle.
+ */
++ (NSSet <NSData *> *)certificatesInBundle:(NSBundle *)bundle;
+
+///-----------------------------------------
+/// @name Getting Specific Security Policies
+///-----------------------------------------
+
+/**
+ Returns the shared default security policy, which does not allow invalid certificates, validates domain name, and does not validate against pinned certificates or public keys.
+
+ @return The default security policy.
+ */
++ (instancetype)defaultPolicy;
+
+///---------------------
+/// @name Initialization
+///---------------------
+
+/**
+ Creates and returns a security policy with the specified pinning mode.
+ 
+ Certificates with the `.cer` extension found in the main bundle will be pinned. If you want more control over which certificates are pinned, please use `policyWithPinningMode:withPinnedCertificates:` instead.
+
+ @param pinningMode The SSL pinning mode.
+
+ @return A new security policy.
+
+ @see -policyWithPinningMode:withPinnedCertificates:
+ */
++ (instancetype)policyWithPinningMode:(AFSSLPinningMode)pinningMode;
+
+/**
+ Creates and returns a security policy with the specified pinning mode.
+
+ @param pinningMode The SSL pinning mode.
+ @param pinnedCertificates The certificates to pin against.
+
+ @return A new security policy.
+
+ @see +certificatesInBundle:
+ @see -pinnedCertificates
+*/
++ (instancetype)policyWithPinningMode:(AFSSLPinningMode)pinningMode withPinnedCertificates:(NSSet <NSData *> *)pinnedCertificates;
+
+///------------------------------
+/// @name Evaluating Server Trust
+///------------------------------
+
+/**
+ Whether or not the specified server trust should be accepted, based on the security policy.
+
+ This method should be used when responding to an authentication challenge from a server.
+
+ @param serverTrust The X.509 certificate trust of the server.
+ @param domain The domain of serverTrust. If `nil`, the domain will not be validated.
+
+ @return Whether or not to trust the server.
+ */
+- (BOOL)evaluateServerTrust:(SecTrustRef)serverTrust
+                  forDomain:(nullable NSString *)domain;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+///----------------
+/// @name Constants
+///----------------
+
+/**
+ ## SSL Pinning Modes
+
+ The following constants are provided by `AFSSLPinningMode` as possible SSL pinning modes.
+
+ enum {
+ AFSSLPinningModeNone,
+ AFSSLPinningModePublicKey,
+ AFSSLPinningModeCertificate,
+ }
+
+ `AFSSLPinningModeNone`
+ Do not used pinned certificates to validate servers.
+
+ `AFSSLPinningModePublicKey`
+ Validate host certificates against public keys of pinned certificates.
+
+ `AFSSLPinningModeCertificate`
+ Validate host certificates against pinned certificates.
+*/

Pods/AFNetworking/AFNetworking/AFSecurityPolicy.m

@@ -0,0 +1,341 @@
+// AFSecurityPolicy.m
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import "AFSecurityPolicy.h"
+
+#import <AssertMacros.h>
+
+#if !TARGET_OS_IOS && !TARGET_OS_WATCH && !TARGET_OS_TV
+static NSData * AFSecKeyGetData(SecKeyRef key) {
+    CFDataRef data = NULL;
+
+    __Require_noErr_Quiet(SecItemExport(key, kSecFormatUnknown, kSecItemPemArmour, NULL, &data), _out);
+
+    return (__bridge_transfer NSData *)data;
+
+_out:
+    if (data) {
+        CFRelease(data);
+    }
+
+    return nil;
+}
+#endif
+
+static BOOL AFSecKeyIsEqualToKey(SecKeyRef key1, SecKeyRef key2) {
+#if TARGET_OS_IOS || TARGET_OS_WATCH || TARGET_OS_TV
+    return [(__bridge id)key1 isEqual:(__bridge id)key2];
+#else
+    return [AFSecKeyGetData(key1) isEqual:AFSecKeyGetData(key2)];
+#endif
+}
+
+static id AFPublicKeyForCertificate(NSData *certificate) {
+    id allowedPublicKey = nil;
+    SecCertificateRef allowedCertificate;
+    SecPolicyRef policy = nil;
+    SecTrustRef allowedTrust = nil;
+    SecTrustResultType result;
+
+    allowedCertificate = SecCertificateCreateWithData(NULL, (__bridge CFDataRef)certificate);
+    __Require_Quiet(allowedCertificate != NULL, _out);
+
+    policy = SecPolicyCreateBasicX509();
+    __Require_noErr_Quiet(SecTrustCreateWithCertificates(allowedCertificate, policy, &allowedTrust), _out);
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+    __Require_noErr_Quiet(SecTrustEvaluate(allowedTrust, &result), _out);
+#pragma clang diagnostic pop
+
+    allowedPublicKey = (__bridge_transfer id)SecTrustCopyPublicKey(allowedTrust);
+
+_out:
+    if (allowedTrust) {
+        CFRelease(allowedTrust);
+    }
+
+    if (policy) {
+        CFRelease(policy);
+    }
+
+    if (allowedCertificate) {
+        CFRelease(allowedCertificate);
+    }
+
+    return allowedPublicKey;
+}
+
+static BOOL AFServerTrustIsValid(SecTrustRef serverTrust) {
+    BOOL isValid = NO;
+    SecTrustResultType result;
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+    __Require_noErr_Quiet(SecTrustEvaluate(serverTrust, &result), _out);
+#pragma clang diagnostic pop
+
+    isValid = (result == kSecTrustResultUnspecified || result == kSecTrustResultProceed);
+
+_out:
+    return isValid;
+}
+
+static NSArray * AFCertificateTrustChainForServerTrust(SecTrustRef serverTrust) {
+    CFIndex certificateCount = SecTrustGetCertificateCount(serverTrust);
+    NSMutableArray *trustChain = [NSMutableArray arrayWithCapacity:(NSUInteger)certificateCount];
+
+    for (CFIndex i = 0; i < certificateCount; i++) {
+        SecCertificateRef certificate = SecTrustGetCertificateAtIndex(serverTrust, i);
+        [trustChain addObject:(__bridge_transfer NSData *)SecCertificateCopyData(certificate)];
+    }
+
+    return [NSArray arrayWithArray:trustChain];
+}
+
+static NSArray * AFPublicKeyTrustChainForServerTrust(SecTrustRef serverTrust) {
+    SecPolicyRef policy = SecPolicyCreateBasicX509();
+    CFIndex certificateCount = SecTrustGetCertificateCount(serverTrust);
+    NSMutableArray *trustChain = [NSMutableArray arrayWithCapacity:(NSUInteger)certificateCount];
+    for (CFIndex i = 0; i < certificateCount; i++) {
+        SecCertificateRef certificate = SecTrustGetCertificateAtIndex(serverTrust, i);
+
+        SecCertificateRef someCertificates[] = {certificate};
+        CFArrayRef certificates = CFArrayCreate(NULL, (const void **)someCertificates, 1, NULL);
+
+        SecTrustRef trust;
+        __Require_noErr_Quiet(SecTrustCreateWithCertificates(certificates, policy, &trust), _out);
+        SecTrustResultType result;
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+        __Require_noErr_Quiet(SecTrustEvaluate(trust, &result), _out);
+#pragma clang diagnostic pop
+        [trustChain addObject:(__bridge_transfer id)SecTrustCopyPublicKey(trust)];
+
+    _out:
+        if (trust) {
+            CFRelease(trust);
+        }
+
+        if (certificates) {
+            CFRelease(certificates);
+        }
+
+        continue;
+    }
+    CFRelease(policy);
+
+    return [NSArray arrayWithArray:trustChain];
+}
+
+#pragma mark -
+
+@interface AFSecurityPolicy()
+@property (readwrite, nonatomic, assign) AFSSLPinningMode SSLPinningMode;
+@property (readwrite, nonatomic, strong) NSSet *pinnedPublicKeys;
+@end
+
+@implementation AFSecurityPolicy
+
++ (NSSet *)certificatesInBundle:(NSBundle *)bundle {
+    NSArray *paths = [bundle pathsForResourcesOfType:@"cer" inDirectory:@"."];
+
+    NSMutableSet *certificates = [NSMutableSet setWithCapacity:[paths count]];
+    for (NSString *path in paths) {
+        NSData *certificateData = [NSData dataWithContentsOfFile:path];
+        [certificates addObject:certificateData];
+    }
+
+    return [NSSet setWithSet:certificates];
+}
+
++ (instancetype)defaultPolicy {
+    AFSecurityPolicy *securityPolicy = [[self alloc] init];
+    securityPolicy.SSLPinningMode = AFSSLPinningModeNone;
+
+    return securityPolicy;
+}
+
++ (instancetype)policyWithPinningMode:(AFSSLPinningMode)pinningMode {
+    NSSet <NSData *> *defaultPinnedCertificates = [self certificatesInBundle:[NSBundle mainBundle]];
+    return [self policyWithPinningMode:pinningMode withPinnedCertificates:defaultPinnedCertificates];
+}
+
++ (instancetype)policyWithPinningMode:(AFSSLPinningMode)pinningMode withPinnedCertificates:(NSSet *)pinnedCertificates {
+    AFSecurityPolicy *securityPolicy = [[self alloc] init];
+    securityPolicy.SSLPinningMode = pinningMode;
+
+    [securityPolicy setPinnedCertificates:pinnedCertificates];
+
+    return securityPolicy;
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.validatesDomainName = YES;
+
+    return self;
+}
+
+- (void)setPinnedCertificates:(NSSet *)pinnedCertificates {
+    _pinnedCertificates = pinnedCertificates;
+
+    if (self.pinnedCertificates) {
+        NSMutableSet *mutablePinnedPublicKeys = [NSMutableSet setWithCapacity:[self.pinnedCertificates count]];
+        for (NSData *certificate in self.pinnedCertificates) {
+            id publicKey = AFPublicKeyForCertificate(certificate);
+            if (!publicKey) {
+                continue;
+            }
+            [mutablePinnedPublicKeys addObject:publicKey];
+        }
+        self.pinnedPublicKeys = [NSSet setWithSet:mutablePinnedPublicKeys];
+    } else {
+        self.pinnedPublicKeys = nil;
+    }
+}
+
+#pragma mark -
+
+- (BOOL)evaluateServerTrust:(SecTrustRef)serverTrust
+                  forDomain:(NSString *)domain
+{
+    if (domain && self.allowInvalidCertificates && self.validatesDomainName && (self.SSLPinningMode == AFSSLPinningModeNone || [self.pinnedCertificates count] == 0)) {
+        // https://developer.apple.com/library/mac/documentation/NetworkingInternet/Conceptual/NetworkingTopics/Articles/OverridingSSLChainValidationCorrectly.html
+        //  According to the docs, you should only trust your provided certs for evaluation.
+        //  Pinned certificates are added to the trust. Without pinned certificates,
+        //  there is nothing to evaluate against.
+        //
+        //  From Apple Docs:
+        //          "Do not implicitly trust self-signed certificates as anchors (kSecTrustOptionImplicitAnchors).
+        //           Instead, add your own (self-signed) CA certificate to the list of trusted anchors."
+        NSLog(@"In order to validate a domain name for self signed certificates, you MUST use pinning.");
+        return NO;
+    }
+
+    NSMutableArray *policies = [NSMutableArray array];
+    if (self.validatesDomainName) {
+        [policies addObject:(__bridge_transfer id)SecPolicyCreateSSL(true, (__bridge CFStringRef)domain)];
+    } else {
+        [policies addObject:(__bridge_transfer id)SecPolicyCreateBasicX509()];
+    }
+
+    SecTrustSetPolicies(serverTrust, (__bridge CFArrayRef)policies);
+
+    if (self.SSLPinningMode == AFSSLPinningModeNone) {
+        return self.allowInvalidCertificates || AFServerTrustIsValid(serverTrust);
+    } else if (!self.allowInvalidCertificates && !AFServerTrustIsValid(serverTrust)) {
+        return NO;
+    }
+
+    switch (self.SSLPinningMode) {
+        case AFSSLPinningModeCertificate: {
+            NSMutableArray *pinnedCertificates = [NSMutableArray array];
+            for (NSData *certificateData in self.pinnedCertificates) {
+                [pinnedCertificates addObject:(__bridge_transfer id)SecCertificateCreateWithData(NULL, (__bridge CFDataRef)certificateData)];
+            }
+            SecTrustSetAnchorCertificates(serverTrust, (__bridge CFArrayRef)pinnedCertificates);
+
+            if (!AFServerTrustIsValid(serverTrust)) {
+                return NO;
+            }
+
+            // obtain the chain after being validated, which *should* contain the pinned certificate in the last position (if it's the Root CA)
+            NSArray *serverCertificates = AFCertificateTrustChainForServerTrust(serverTrust);
+            
+            for (NSData *trustChainCertificate in [serverCertificates reverseObjectEnumerator]) {
+                if ([self.pinnedCertificates containsObject:trustChainCertificate]) {
+                    return YES;
+                }
+            }
+            
+            return NO;
+        }
+        case AFSSLPinningModePublicKey: {
+            NSUInteger trustedPublicKeyCount = 0;
+            NSArray *publicKeys = AFPublicKeyTrustChainForServerTrust(serverTrust);
+
+            for (id trustChainPublicKey in publicKeys) {
+                for (id pinnedPublicKey in self.pinnedPublicKeys) {
+                    if (AFSecKeyIsEqualToKey((__bridge SecKeyRef)trustChainPublicKey, (__bridge SecKeyRef)pinnedPublicKey)) {
+                        trustedPublicKeyCount += 1;
+                    }
+                }
+            }
+            return trustedPublicKeyCount > 0;
+        }
+            
+        default:
+            return NO;
+    }
+    
+    return NO;
+}
+
+#pragma mark - NSKeyValueObserving
+
++ (NSSet *)keyPathsForValuesAffectingPinnedPublicKeys {
+    return [NSSet setWithObject:@"pinnedCertificates"];
+}
+
+#pragma mark - NSSecureCoding
+
++ (BOOL)supportsSecureCoding {
+    return YES;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+
+    self = [self init];
+    if (!self) {
+        return nil;
+    }
+
+    self.SSLPinningMode = [[decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(SSLPinningMode))] unsignedIntegerValue];
+    self.allowInvalidCertificates = [decoder decodeBoolForKey:NSStringFromSelector(@selector(allowInvalidCertificates))];
+    self.validatesDomainName = [decoder decodeBoolForKey:NSStringFromSelector(@selector(validatesDomainName))];
+    self.pinnedCertificates = [decoder decodeObjectOfClass:[NSSet class] forKey:NSStringFromSelector(@selector(pinnedCertificates))];
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [coder encodeObject:[NSNumber numberWithUnsignedInteger:self.SSLPinningMode] forKey:NSStringFromSelector(@selector(SSLPinningMode))];
+    [coder encodeBool:self.allowInvalidCertificates forKey:NSStringFromSelector(@selector(allowInvalidCertificates))];
+    [coder encodeBool:self.validatesDomainName forKey:NSStringFromSelector(@selector(validatesDomainName))];
+    [coder encodeObject:self.pinnedCertificates forKey:NSStringFromSelector(@selector(pinnedCertificates))];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFSecurityPolicy *securityPolicy = [[[self class] allocWithZone:zone] init];
+    securityPolicy.SSLPinningMode = self.SSLPinningMode;
+    securityPolicy.allowInvalidCertificates = self.allowInvalidCertificates;
+    securityPolicy.validatesDomainName = self.validatesDomainName;
+    securityPolicy.pinnedCertificates = [self.pinnedCertificates copyWithZone:zone];
+
+    return securityPolicy;
+}
+
+@end

Pods/AFNetworking/AFNetworking/AFURLResponseSerialization.h

@@ -0,0 +1,313 @@
+// AFURLResponseSerialization.h
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <Foundation/Foundation.h>
+#import <CoreGraphics/CoreGraphics.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ Recursively removes `NSNull` values from a JSON object.
+*/
+FOUNDATION_EXPORT id AFJSONObjectByRemovingKeysWithNullValues(id JSONObject, NSJSONReadingOptions readingOptions);
+
+/**
+ The `AFURLResponseSerialization` protocol is adopted by an object that decodes data into a more useful object representation, according to details in the server response. Response serializers may additionally perform validation on the incoming response and data.
+
+ For example, a JSON response serializer may check for an acceptable status code (`2XX` range) and content type (`application/json`), decoding a valid JSON response into an object.
+ */
+@protocol AFURLResponseSerialization <NSObject, NSSecureCoding, NSCopying>
+
+/**
+ The response object decoded from the data associated with a specified response.
+
+ @param response The response to be processed.
+ @param data The response data to be decoded.
+ @param error The error that occurred while attempting to decode the response data.
+
+ @return The object decoded from the specified response data.
+ */
+- (nullable id)responseObjectForResponse:(nullable NSURLResponse *)response
+                           data:(nullable NSData *)data
+                          error:(NSError * _Nullable __autoreleasing *)error NS_SWIFT_NOTHROW;
+
+@end
+
+#pragma mark -
+
+/**
+ `AFHTTPResponseSerializer` conforms to the `AFURLRequestSerialization` & `AFURLResponseSerialization` protocols, offering a concrete base implementation of query string / URL form-encoded parameter serialization and default request headers, as well as response status code and content type validation.
+
+ Any request or response serializer dealing with HTTP is encouraged to subclass `AFHTTPResponseSerializer` in order to ensure consistent default behavior.
+ */
+@interface AFHTTPResponseSerializer : NSObject <AFURLResponseSerialization>
+
+- (instancetype)init;
+
+/**
+ Creates and returns a serializer with default configuration.
+ */
++ (instancetype)serializer;
+
+///-----------------------------------------
+/// @name Configuring Response Serialization
+///-----------------------------------------
+
+/**
+ The acceptable HTTP status codes for responses. When non-`nil`, responses with status codes not contained by the set will result in an error during validation.
+
+ See http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
+ */
+@property (nonatomic, copy, nullable) NSIndexSet *acceptableStatusCodes;
+
+/**
+ The acceptable MIME types for responses. When non-`nil`, responses with a `Content-Type` with MIME types that do not intersect with the set will result in an error during validation.
+ */
+@property (nonatomic, copy, nullable) NSSet <NSString *> *acceptableContentTypes;
+
+/**
+ Validates the specified response and data.
+
+ In its base implementation, this method checks for an acceptable status code and content type. Subclasses may wish to add other domain-specific checks.
+
+ @param response The response to be validated.
+ @param data The data associated with the response.
+ @param error The error that occurred while attempting to validate the response.
+
+ @return `YES` if the response is valid, otherwise `NO`.
+ */
+- (BOOL)validateResponse:(nullable NSHTTPURLResponse *)response
+                    data:(nullable NSData *)data
+                   error:(NSError * _Nullable __autoreleasing *)error;
+
+@end
+
+#pragma mark -
+
+
+/**
+ `AFJSONResponseSerializer` is a subclass of `AFHTTPResponseSerializer` that validates and decodes JSON responses.
+
+ By default, `AFJSONResponseSerializer` accepts the following MIME types, which includes the official standard, `application/json`, as well as other commonly-used types:
+
+ - `application/json`
+ - `text/json`
+ - `text/javascript`
+
+ In RFC 7159 - Section 8.1, it states that JSON text is required to be encoded in UTF-8, UTF-16, or UTF-32, and the default encoding is UTF-8. NSJSONSerialization provides support for all the encodings listed in the specification, and recommends UTF-8 for efficiency. Using an unsupported encoding will result in serialization error. See the `NSJSONSerialization` documentation for more details.
+ */
+@interface AFJSONResponseSerializer : AFHTTPResponseSerializer
+
+- (instancetype)init;
+
+/**
+ Options for reading the response JSON data and creating the Foundation objects. For possible values, see the `NSJSONSerialization` documentation section "NSJSONReadingOptions". `0` by default.
+ */
+@property (nonatomic, assign) NSJSONReadingOptions readingOptions;
+
+/**
+ Whether to remove keys with `NSNull` values from response JSON. Defaults to `NO`.
+ */
+@property (nonatomic, assign) BOOL removesKeysWithNullValues;
+
+/**
+ Creates and returns a JSON serializer with specified reading and writing options.
+
+ @param readingOptions The specified JSON reading options.
+ */
++ (instancetype)serializerWithReadingOptions:(NSJSONReadingOptions)readingOptions;
+
+@end
+
+#pragma mark -
+
+/**
+ `AFXMLParserResponseSerializer` is a subclass of `AFHTTPResponseSerializer` that validates and decodes XML responses as an `NSXMLParser` objects.
+
+ By default, `AFXMLParserResponseSerializer` accepts the following MIME types, which includes the official standard, `application/xml`, as well as other commonly-used types:
+
+ - `application/xml`
+ - `text/xml`
+ */
+@interface AFXMLParserResponseSerializer : AFHTTPResponseSerializer
+
+@end
+
+#pragma mark -
+
+#ifdef __MAC_OS_X_VERSION_MIN_REQUIRED
+
+/**
+ `AFXMLDocumentResponseSerializer` is a subclass of `AFHTTPResponseSerializer` that validates and decodes XML responses as an `NSXMLDocument` objects.
+
+ By default, `AFXMLDocumentResponseSerializer` accepts the following MIME types, which includes the official standard, `application/xml`, as well as other commonly-used types:
+
+ - `application/xml`
+ - `text/xml`
+ */
+@interface AFXMLDocumentResponseSerializer : AFHTTPResponseSerializer
+
+- (instancetype)init;
+
+/**
+ Input and output options specifically intended for `NSXMLDocument` objects. For possible values, see the `NSXMLDocument` documentation section "Input and Output Options". `0` by default.
+ */
+@property (nonatomic, assign) NSUInteger options;
+
+/**
+ Creates and returns an XML document serializer with the specified options.
+
+ @param mask The XML document options.
+ */
++ (instancetype)serializerWithXMLDocumentOptions:(NSUInteger)mask;
+
+@end
+
+#endif
+
+#pragma mark -
+
+/**
+ `AFPropertyListResponseSerializer` is a subclass of `AFHTTPResponseSerializer` that validates and decodes XML responses as an `NSXMLDocument` objects.
+
+ By default, `AFPropertyListResponseSerializer` accepts the following MIME types:
+
+ - `application/x-plist`
+ */
+@interface AFPropertyListResponseSerializer : AFHTTPResponseSerializer
+
+- (instancetype)init;
+
+/**
+ The property list format. Possible values are described in "NSPropertyListFormat".
+ */
+@property (nonatomic, assign) NSPropertyListFormat format;
+
+/**
+ The property list reading options. Possible values are described in "NSPropertyListMutabilityOptions."
+ */
+@property (nonatomic, assign) NSPropertyListReadOptions readOptions;
+
+/**
+ Creates and returns a property list serializer with a specified format, read options, and write options.
+
+ @param format The property list format.
+ @param readOptions The property list reading options.
+ */
++ (instancetype)serializerWithFormat:(NSPropertyListFormat)format
+                         readOptions:(NSPropertyListReadOptions)readOptions;
+
+@end
+
+#pragma mark -
+
+/**
+ `AFImageResponseSerializer` is a subclass of `AFHTTPResponseSerializer` that validates and decodes image responses.
+
+ By default, `AFImageResponseSerializer` accepts the following MIME types, which correspond to the image formats supported by UIImage or NSImage:
+
+ - `image/tiff`
+ - `image/jpeg`
+ - `image/gif`
+ - `image/png`
+ - `image/ico`
+ - `image/x-icon`
+ - `image/bmp`
+ - `image/x-bmp`
+ - `image/x-xbitmap`
+ - `image/x-win-bitmap`
+ */
+@interface AFImageResponseSerializer : AFHTTPResponseSerializer
+
+#if TARGET_OS_IOS || TARGET_OS_TV || TARGET_OS_WATCH
+/**
+ The scale factor used when interpreting the image data to construct `responseImage`. Specifying a scale factor of 1.0 results in an image whose size matches the pixel-based dimensions of the image. Applying a different scale factor changes the size of the image as reported by the size property. This is set to the value of scale of the main screen by default, which automatically scales images for retina displays, for instance.
+ */
+@property (nonatomic, assign) CGFloat imageScale;
+
+/**
+ Whether to automatically inflate response image data for compressed formats (such as PNG or JPEG). Enabling this can significantly improve drawing performance on iOS when used with `setCompletionBlockWithSuccess:failure:`, as it allows a bitmap representation to be constructed in the background rather than on the main thread. `YES` by default.
+ */
+@property (nonatomic, assign) BOOL automaticallyInflatesResponseImage;
+#endif
+
+@end
+
+#pragma mark -
+
+/**
+ `AFCompoundSerializer` is a subclass of `AFHTTPResponseSerializer` that delegates the response serialization to the first `AFHTTPResponseSerializer` object that returns an object for `responseObjectForResponse:data:error:`, falling back on the default behavior of `AFHTTPResponseSerializer`. This is useful for supporting multiple potential types and structures of server responses with a single serializer.
+ */
+@interface AFCompoundResponseSerializer : AFHTTPResponseSerializer
+
+/**
+ The component response serializers.
+ */
+@property (readonly, nonatomic, copy) NSArray <id<AFURLResponseSerialization>> *responseSerializers;
+
+/**
+ Creates and returns a compound serializer comprised of the specified response serializers.
+
+ @warning Each response serializer specified must be a subclass of `AFHTTPResponseSerializer`, and response to `-validateResponse:data:error:`.
+ */
++ (instancetype)compoundSerializerWithResponseSerializers:(NSArray <id<AFURLResponseSerialization>> *)responseSerializers;
+
+@end
+
+///----------------
+/// @name Constants
+///----------------
+
+/**
+ ## Error Domains
+
+ The following error domain is predefined.
+
+ - `NSString * const AFURLResponseSerializationErrorDomain`
+
+ ### Constants
+
+ `AFURLResponseSerializationErrorDomain`
+ AFURLResponseSerializer errors. Error codes for `AFURLResponseSerializationErrorDomain` correspond to codes in `NSURLErrorDomain`.
+ */
+FOUNDATION_EXPORT NSString * const AFURLResponseSerializationErrorDomain;
+
+/**
+ ## User info dictionary keys
+
+ These keys may exist in the user info dictionary, in addition to those defined for NSError.
+
+ - `NSString * const AFNetworkingOperationFailingURLResponseErrorKey`
+ - `NSString * const AFNetworkingOperationFailingURLResponseDataErrorKey`
+
+ ### Constants
+
+ `AFNetworkingOperationFailingURLResponseErrorKey`
+ The corresponding value is an `NSURLResponse` containing the response of the operation associated with an error. This key is only present in the `AFURLResponseSerializationErrorDomain`.
+
+ `AFNetworkingOperationFailingURLResponseDataErrorKey`
+ The corresponding value is an `NSData` containing the original data of the operation associated with an error. This key is only present in the `AFURLResponseSerializationErrorDomain`.
+ */
+FOUNDATION_EXPORT NSString * const AFNetworkingOperationFailingURLResponseErrorKey;
+
+FOUNDATION_EXPORT NSString * const AFNetworkingOperationFailingURLResponseDataErrorKey;
+
+NS_ASSUME_NONNULL_END

Pods/AFNetworking/AFNetworking/AFURLResponseSerialization.m

@@ -0,0 +1,836 @@
+// AFURLResponseSerialization.m
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import "AFURLResponseSerialization.h"
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS
+#import <UIKit/UIKit.h>
+#elif TARGET_OS_WATCH
+#import <WatchKit/WatchKit.h>
+#elif defined(__MAC_OS_X_VERSION_MIN_REQUIRED)
+#import <Cocoa/Cocoa.h>
+#endif
+
+NSString * const AFURLResponseSerializationErrorDomain = @"com.alamofire.error.serialization.response";
+NSString * const AFNetworkingOperationFailingURLResponseErrorKey = @"com.alamofire.serialization.response.error.response";
+NSString * const AFNetworkingOperationFailingURLResponseDataErrorKey = @"com.alamofire.serialization.response.error.data";
+
+static NSError * AFErrorWithUnderlyingError(NSError *error, NSError *underlyingError) {
+    if (!error) {
+        return underlyingError;
+    }
+
+    if (!underlyingError || error.userInfo[NSUnderlyingErrorKey]) {
+        return error;
+    }
+
+    NSMutableDictionary *mutableUserInfo = [error.userInfo mutableCopy];
+    mutableUserInfo[NSUnderlyingErrorKey] = underlyingError;
+
+    return [[NSError alloc] initWithDomain:error.domain code:error.code userInfo:mutableUserInfo];
+}
+
+static BOOL AFErrorOrUnderlyingErrorHasCodeInDomain(NSError *error, NSInteger code, NSString *domain) {
+    if ([error.domain isEqualToString:domain] && error.code == code) {
+        return YES;
+    } else if (error.userInfo[NSUnderlyingErrorKey]) {
+        return AFErrorOrUnderlyingErrorHasCodeInDomain(error.userInfo[NSUnderlyingErrorKey], code, domain);
+    }
+
+    return NO;
+}
+
+id AFJSONObjectByRemovingKeysWithNullValues(id JSONObject, NSJSONReadingOptions readingOptions) {
+    if ([JSONObject isKindOfClass:[NSArray class]]) {
+        NSMutableArray *mutableArray = [NSMutableArray arrayWithCapacity:[(NSArray *)JSONObject count]];
+        for (id value in (NSArray *)JSONObject) {
+            if (![value isEqual:[NSNull null]]) {
+                [mutableArray addObject:AFJSONObjectByRemovingKeysWithNullValues(value, readingOptions)];
+            }
+        }
+
+        return (readingOptions & NSJSONReadingMutableContainers) ? mutableArray : [NSArray arrayWithArray:mutableArray];
+    } else if ([JSONObject isKindOfClass:[NSDictionary class]]) {
+        NSMutableDictionary *mutableDictionary = [NSMutableDictionary dictionaryWithDictionary:JSONObject];
+        for (id <NSCopying> key in [(NSDictionary *)JSONObject allKeys]) {
+            id value = (NSDictionary *)JSONObject[key];
+            if (!value || [value isEqual:[NSNull null]]) {
+                [mutableDictionary removeObjectForKey:key];
+            } else if ([value isKindOfClass:[NSArray class]] || [value isKindOfClass:[NSDictionary class]]) {
+                mutableDictionary[key] = AFJSONObjectByRemovingKeysWithNullValues(value, readingOptions);
+            }
+        }
+
+        return (readingOptions & NSJSONReadingMutableContainers) ? mutableDictionary : [NSDictionary dictionaryWithDictionary:mutableDictionary];
+    }
+
+    return JSONObject;
+}
+
+@implementation AFHTTPResponseSerializer
+
++ (instancetype)serializer {
+    return [[self alloc] init];
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.acceptableStatusCodes = [NSIndexSet indexSetWithIndexesInRange:NSMakeRange(200, 100)];
+    self.acceptableContentTypes = nil;
+
+    return self;
+}
+
+#pragma mark -
+
+- (BOOL)validateResponse:(NSHTTPURLResponse *)response
+                    data:(NSData *)data
+                   error:(NSError * __autoreleasing *)error
+{
+    BOOL responseIsValid = YES;
+    NSError *validationError = nil;
+
+    if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
+        if (self.acceptableContentTypes && ![self.acceptableContentTypes containsObject:[response MIMEType]] &&
+            !([response MIMEType] == nil && [data length] == 0)) {
+
+            if ([data length] > 0 && [response URL]) {
+                NSMutableDictionary *mutableUserInfo = [@{
+                                                          NSLocalizedDescriptionKey: [NSString stringWithFormat:NSLocalizedStringFromTable(@"Request failed: unacceptable content-type: %@", @"AFNetworking", nil), [response MIMEType]],
+                                                          NSURLErrorFailingURLErrorKey:[response URL],
+                                                          AFNetworkingOperationFailingURLResponseErrorKey: response,
+                                                        } mutableCopy];
+                if (data) {
+                    mutableUserInfo[AFNetworkingOperationFailingURLResponseDataErrorKey] = data;
+                }
+
+                validationError = AFErrorWithUnderlyingError([NSError errorWithDomain:AFURLResponseSerializationErrorDomain code:NSURLErrorCannotDecodeContentData userInfo:mutableUserInfo], validationError);
+            }
+
+            responseIsValid = NO;
+        }
+
+        if (self.acceptableStatusCodes && ![self.acceptableStatusCodes containsIndex:(NSUInteger)response.statusCode] && [response URL]) {
+            NSMutableDictionary *mutableUserInfo = [@{
+                                               NSLocalizedDescriptionKey: [NSString stringWithFormat:NSLocalizedStringFromTable(@"Request failed: %@ (%ld)", @"AFNetworking", nil), [NSHTTPURLResponse localizedStringForStatusCode:response.statusCode], (long)response.statusCode],
+                                               NSURLErrorFailingURLErrorKey:[response URL],
+                                               AFNetworkingOperationFailingURLResponseErrorKey: response,
+                                       } mutableCopy];
+
+            if (data) {
+                mutableUserInfo[AFNetworkingOperationFailingURLResponseDataErrorKey] = data;
+            }
+
+            validationError = AFErrorWithUnderlyingError([NSError errorWithDomain:AFURLResponseSerializationErrorDomain code:NSURLErrorBadServerResponse userInfo:mutableUserInfo], validationError);
+
+            responseIsValid = NO;
+        }
+    }
+
+    if (error && !responseIsValid) {
+        *error = validationError;
+    }
+
+    return responseIsValid;
+}
+
+#pragma mark - AFURLResponseSerialization
+
+- (id)responseObjectForResponse:(NSURLResponse *)response
+                           data:(NSData *)data
+                          error:(NSError *__autoreleasing *)error
+{
+    [self validateResponse:(NSHTTPURLResponse *)response data:data error:error];
+
+    return data;
+}
+
+#pragma mark - NSSecureCoding
+
++ (BOOL)supportsSecureCoding {
+    return YES;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    self = [self init];
+    if (!self) {
+        return nil;
+    }
+
+    self.acceptableStatusCodes = [decoder decodeObjectOfClass:[NSIndexSet class] forKey:NSStringFromSelector(@selector(acceptableStatusCodes))];
+    self.acceptableContentTypes = [decoder decodeObjectOfClass:[NSSet class] forKey:NSStringFromSelector(@selector(acceptableContentTypes))];
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [coder encodeObject:self.acceptableStatusCodes forKey:NSStringFromSelector(@selector(acceptableStatusCodes))];
+    [coder encodeObject:self.acceptableContentTypes forKey:NSStringFromSelector(@selector(acceptableContentTypes))];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFHTTPResponseSerializer *serializer = [[[self class] allocWithZone:zone] init];
+    serializer.acceptableStatusCodes = [self.acceptableStatusCodes copyWithZone:zone];
+    serializer.acceptableContentTypes = [self.acceptableContentTypes copyWithZone:zone];
+
+    return serializer;
+}
+
+@end
+
+#pragma mark -
+
+@implementation AFJSONResponseSerializer
+
++ (instancetype)serializer {
+    return [self serializerWithReadingOptions:(NSJSONReadingOptions)0];
+}
+
++ (instancetype)serializerWithReadingOptions:(NSJSONReadingOptions)readingOptions {
+    AFJSONResponseSerializer *serializer = [[self alloc] init];
+    serializer.readingOptions = readingOptions;
+
+    return serializer;
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", nil];
+
+    return self;
+}
+
+#pragma mark - AFURLResponseSerialization
+
+- (id)responseObjectForResponse:(NSURLResponse *)response
+                           data:(NSData *)data
+                          error:(NSError *__autoreleasing *)error
+{
+    if (![self validateResponse:(NSHTTPURLResponse *)response data:data error:error]) {
+        if (!error || AFErrorOrUnderlyingErrorHasCodeInDomain(*error, NSURLErrorCannotDecodeContentData, AFURLResponseSerializationErrorDomain)) {
+            return nil;
+        }
+    }
+
+    // Workaround for behavior of Rails to return a single space for `head :ok` (a workaround for a bug in Safari), which is not interpreted as valid input by NSJSONSerialization.
+    // See https://github.com/rails/rails/issues/1742
+    BOOL isSpace = [data isEqualToData:[NSData dataWithBytes:" " length:1]];
+    
+    if (data.length == 0 || isSpace) {
+        return nil;
+    }
+    
+    NSError *serializationError = nil;
+    
+    id responseObject = [NSJSONSerialization JSONObjectWithData:data options:self.readingOptions error:&serializationError];
+
+    if (!responseObject)
+    {
+        if (error) {
+            *error = AFErrorWithUnderlyingError(serializationError, *error);
+        }
+        return nil;
+    }
+    
+    if (self.removesKeysWithNullValues) {
+        return AFJSONObjectByRemovingKeysWithNullValues(responseObject, self.readingOptions);
+    }
+
+    return responseObject;
+}
+
+#pragma mark - NSSecureCoding
+
++ (BOOL)supportsSecureCoding {
+    return YES;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    self = [super initWithCoder:decoder];
+    if (!self) {
+        return nil;
+    }
+
+    self.readingOptions = [[decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(readingOptions))] unsignedIntegerValue];
+    self.removesKeysWithNullValues = [[decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(removesKeysWithNullValues))] boolValue];
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [super encodeWithCoder:coder];
+
+    [coder encodeObject:@(self.readingOptions) forKey:NSStringFromSelector(@selector(readingOptions))];
+    [coder encodeObject:@(self.removesKeysWithNullValues) forKey:NSStringFromSelector(@selector(removesKeysWithNullValues))];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFJSONResponseSerializer *serializer = [super copyWithZone:zone];
+    serializer.readingOptions = self.readingOptions;
+    serializer.removesKeysWithNullValues = self.removesKeysWithNullValues;
+
+    return serializer;
+}
+
+@end
+
+#pragma mark -
+
+@implementation AFXMLParserResponseSerializer
+
++ (instancetype)serializer {
+    AFXMLParserResponseSerializer *serializer = [[self alloc] init];
+
+    return serializer;
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.acceptableContentTypes = [[NSSet alloc] initWithObjects:@"application/xml", @"text/xml", nil];
+
+    return self;
+}
+
+#pragma mark - AFURLResponseSerialization
+
+- (id)responseObjectForResponse:(NSHTTPURLResponse *)response
+                           data:(NSData *)data
+                          error:(NSError *__autoreleasing *)error
+{
+    if (![self validateResponse:(NSHTTPURLResponse *)response data:data error:error]) {
+        if (!error || AFErrorOrUnderlyingErrorHasCodeInDomain(*error, NSURLErrorCannotDecodeContentData, AFURLResponseSerializationErrorDomain)) {
+            return nil;
+        }
+    }
+
+    return [[NSXMLParser alloc] initWithData:data];
+}
+
+@end
+
+#pragma mark -
+
+#ifdef __MAC_OS_X_VERSION_MIN_REQUIRED
+
+@implementation AFXMLDocumentResponseSerializer
+
++ (instancetype)serializer {
+    return [self serializerWithXMLDocumentOptions:0];
+}
+
++ (instancetype)serializerWithXMLDocumentOptions:(NSUInteger)mask {
+    AFXMLDocumentResponseSerializer *serializer = [[self alloc] init];
+    serializer.options = mask;
+
+    return serializer;
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.acceptableContentTypes = [[NSSet alloc] initWithObjects:@"application/xml", @"text/xml", nil];
+
+    return self;
+}
+
+#pragma mark - AFURLResponseSerialization
+
+- (id)responseObjectForResponse:(NSURLResponse *)response
+                           data:(NSData *)data
+                          error:(NSError *__autoreleasing *)error
+{
+    if (![self validateResponse:(NSHTTPURLResponse *)response data:data error:error]) {
+        if (!error || AFErrorOrUnderlyingErrorHasCodeInDomain(*error, NSURLErrorCannotDecodeContentData, AFURLResponseSerializationErrorDomain)) {
+            return nil;
+        }
+    }
+
+    NSError *serializationError = nil;
+    NSXMLDocument *document = [[NSXMLDocument alloc] initWithData:data options:self.options error:&serializationError];
+
+    if (!document)
+    {
+        if (error) {
+            *error = AFErrorWithUnderlyingError(serializationError, *error);
+        }
+        return nil;
+    }
+    
+    return document;
+}
+
+#pragma mark - NSSecureCoding
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    self = [super initWithCoder:decoder];
+    if (!self) {
+        return nil;
+    }
+
+    self.options = [[decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(options))] unsignedIntegerValue];
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [super encodeWithCoder:coder];
+
+    [coder encodeObject:@(self.options) forKey:NSStringFromSelector(@selector(options))];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFXMLDocumentResponseSerializer *serializer = [super copyWithZone:zone];
+    serializer.options = self.options;
+
+    return serializer;
+}
+
+@end
+
+#endif
+
+#pragma mark -
+
+@implementation AFPropertyListResponseSerializer
+
++ (instancetype)serializer {
+    return [self serializerWithFormat:NSPropertyListXMLFormat_v1_0 readOptions:0];
+}
+
++ (instancetype)serializerWithFormat:(NSPropertyListFormat)format
+                         readOptions:(NSPropertyListReadOptions)readOptions
+{
+    AFPropertyListResponseSerializer *serializer = [[self alloc] init];
+    serializer.format = format;
+    serializer.readOptions = readOptions;
+
+    return serializer;
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.acceptableContentTypes = [[NSSet alloc] initWithObjects:@"application/x-plist", nil];
+
+    return self;
+}
+
+#pragma mark - AFURLResponseSerialization
+
+- (id)responseObjectForResponse:(NSURLResponse *)response
+                           data:(NSData *)data
+                          error:(NSError *__autoreleasing *)error
+{
+    if (![self validateResponse:(NSHTTPURLResponse *)response data:data error:error]) {
+        if (!error || AFErrorOrUnderlyingErrorHasCodeInDomain(*error, NSURLErrorCannotDecodeContentData, AFURLResponseSerializationErrorDomain)) {
+            return nil;
+        }
+    }
+
+    if (!data) {
+        return nil;
+    }
+    
+    NSError *serializationError = nil;
+    
+    id responseObject = [NSPropertyListSerialization propertyListWithData:data options:self.readOptions format:NULL error:&serializationError];
+    
+    if (!responseObject)
+    {
+        if (error) {
+            *error = AFErrorWithUnderlyingError(serializationError, *error);
+        }
+        return nil;
+    }
+
+    return responseObject;
+}
+
+#pragma mark - NSSecureCoding
+
++ (BOOL)supportsSecureCoding {
+    return YES;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    self = [super initWithCoder:decoder];
+    if (!self) {
+        return nil;
+    }
+
+    self.format = (NSPropertyListFormat)[[decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(format))] unsignedIntegerValue];
+    self.readOptions = [[decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(readOptions))] unsignedIntegerValue];
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [super encodeWithCoder:coder];
+
+    [coder encodeObject:@(self.format) forKey:NSStringFromSelector(@selector(format))];
+    [coder encodeObject:@(self.readOptions) forKey:NSStringFromSelector(@selector(readOptions))];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFPropertyListResponseSerializer *serializer = [super copyWithZone:zone];
+    serializer.format = self.format;
+    serializer.readOptions = self.readOptions;
+
+    return serializer;
+}
+
+@end
+
+#pragma mark -
+
+#if TARGET_OS_IOS || TARGET_OS_TV || TARGET_OS_WATCH
+#import <CoreGraphics/CoreGraphics.h>
+#import <UIKit/UIKit.h>
+
+@interface UIImage (AFNetworkingSafeImageLoading)
++ (UIImage *)af_safeImageWithData:(NSData *)data;
+@end
+
+static NSLock* imageLock = nil;
+
+@implementation UIImage (AFNetworkingSafeImageLoading)
+
++ (UIImage *)af_safeImageWithData:(NSData *)data {
+    UIImage* image = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        imageLock = [[NSLock alloc] init];
+    });
+    
+    [imageLock lock];
+    image = [UIImage imageWithData:data];
+    [imageLock unlock];
+    return image;
+}
+
+@end
+
+static UIImage * AFImageWithDataAtScale(NSData *data, CGFloat scale) {
+    UIImage *image = [UIImage af_safeImageWithData:data];
+    if (image.images) {
+        return image;
+    }
+    
+    return [[UIImage alloc] initWithCGImage:[image CGImage] scale:scale orientation:image.imageOrientation];
+}
+
+static UIImage * AFInflatedImageFromResponseWithDataAtScale(NSHTTPURLResponse *response, NSData *data, CGFloat scale) {
+    if (!data || [data length] == 0) {
+        return nil;
+    }
+
+    CGImageRef imageRef = NULL;
+    CGDataProviderRef dataProvider = CGDataProviderCreateWithCFData((__bridge CFDataRef)data);
+
+    if ([response.MIMEType isEqualToString:@"image/png"]) {
+        imageRef = CGImageCreateWithPNGDataProvider(dataProvider,  NULL, true, kCGRenderingIntentDefault);
+    } else if ([response.MIMEType isEqualToString:@"image/jpeg"]) {
+        imageRef = CGImageCreateWithJPEGDataProvider(dataProvider, NULL, true, kCGRenderingIntentDefault);
+
+        if (imageRef) {
+            CGColorSpaceRef imageColorSpace = CGImageGetColorSpace(imageRef);
+            CGColorSpaceModel imageColorSpaceModel = CGColorSpaceGetModel(imageColorSpace);
+
+            // CGImageCreateWithJPEGDataProvider does not properly handle CMKY, so fall back to AFImageWithDataAtScale
+            if (imageColorSpaceModel == kCGColorSpaceModelCMYK) {
+                CGImageRelease(imageRef);
+                imageRef = NULL;
+            }
+        }
+    }
+
+    CGDataProviderRelease(dataProvider);
+
+    UIImage *image = AFImageWithDataAtScale(data, scale);
+    if (!imageRef) {
+        if (image.images || !image) {
+            return image;
+        }
+
+        imageRef = CGImageCreateCopy([image CGImage]);
+        if (!imageRef) {
+            return nil;
+        }
+    }
+
+    size_t width = CGImageGetWidth(imageRef);
+    size_t height = CGImageGetHeight(imageRef);
+    size_t bitsPerComponent = CGImageGetBitsPerComponent(imageRef);
+
+    if (width * height > 1024 * 1024 || bitsPerComponent > 8) {
+        CGImageRelease(imageRef);
+
+        return image;
+    }
+
+    // CGImageGetBytesPerRow() calculates incorrectly in iOS 5.0, so defer to CGBitmapContextCreate
+    size_t bytesPerRow = 0;
+    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
+    CGColorSpaceModel colorSpaceModel = CGColorSpaceGetModel(colorSpace);
+    CGBitmapInfo bitmapInfo = CGImageGetBitmapInfo(imageRef);
+
+    if (colorSpaceModel == kCGColorSpaceModelRGB) {
+        uint32_t alpha = (bitmapInfo & kCGBitmapAlphaInfoMask);
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wassign-enum"
+        if (alpha == kCGImageAlphaNone) {
+            bitmapInfo &= ~kCGBitmapAlphaInfoMask;
+            bitmapInfo |= kCGImageAlphaNoneSkipFirst;
+        } else if (!(alpha == kCGImageAlphaNoneSkipFirst || alpha == kCGImageAlphaNoneSkipLast)) {
+            bitmapInfo &= ~kCGBitmapAlphaInfoMask;
+            bitmapInfo |= kCGImageAlphaPremultipliedFirst;
+        }
+#pragma clang diagnostic pop
+    }
+
+    CGContextRef context = CGBitmapContextCreate(NULL, width, height, bitsPerComponent, bytesPerRow, colorSpace, bitmapInfo);
+
+    CGColorSpaceRelease(colorSpace);
+
+    if (!context) {
+        CGImageRelease(imageRef);
+
+        return image;
+    }
+
+    CGContextDrawImage(context, CGRectMake(0.0f, 0.0f, width, height), imageRef);
+    CGImageRef inflatedImageRef = CGBitmapContextCreateImage(context);
+
+    CGContextRelease(context);
+
+    UIImage *inflatedImage = [[UIImage alloc] initWithCGImage:inflatedImageRef scale:scale orientation:image.imageOrientation];
+
+    CGImageRelease(inflatedImageRef);
+    CGImageRelease(imageRef);
+
+    return inflatedImage;
+}
+#endif
+
+
+@implementation AFImageResponseSerializer
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.acceptableContentTypes = [[NSSet alloc] initWithObjects:@"image/tiff", @"image/jpeg", @"image/gif", @"image/png", @"image/ico", @"image/x-icon", @"image/bmp", @"image/x-bmp", @"image/x-xbitmap", @"image/x-win-bitmap", nil];
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+    self.imageScale = [[UIScreen mainScreen] scale];
+    self.automaticallyInflatesResponseImage = YES;
+#elif TARGET_OS_WATCH
+    self.imageScale = [[WKInterfaceDevice currentDevice] screenScale];
+    self.automaticallyInflatesResponseImage = YES;
+#endif
+
+    return self;
+}
+
+#pragma mark - AFURLResponseSerializer
+
+- (id)responseObjectForResponse:(NSURLResponse *)response
+                           data:(NSData *)data
+                          error:(NSError *__autoreleasing *)error
+{
+    if (![self validateResponse:(NSHTTPURLResponse *)response data:data error:error]) {
+        if (!error || AFErrorOrUnderlyingErrorHasCodeInDomain(*error, NSURLErrorCannotDecodeContentData, AFURLResponseSerializationErrorDomain)) {
+            return nil;
+        }
+    }
+
+#if TARGET_OS_IOS || TARGET_OS_TV || TARGET_OS_WATCH
+    if (self.automaticallyInflatesResponseImage) {
+        return AFInflatedImageFromResponseWithDataAtScale((NSHTTPURLResponse *)response, data, self.imageScale);
+    } else {
+        return AFImageWithDataAtScale(data, self.imageScale);
+    }
+#else
+    // Ensure that the image is set to it's correct pixel width and height
+    NSBitmapImageRep *bitimage = [[NSBitmapImageRep alloc] initWithData:data];
+    NSImage *image = [[NSImage alloc] initWithSize:NSMakeSize([bitimage pixelsWide], [bitimage pixelsHigh])];
+    [image addRepresentation:bitimage];
+
+    return image;
+#endif
+
+    return nil;
+}
+
+#pragma mark - NSSecureCoding
+
++ (BOOL)supportsSecureCoding {
+    return YES;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    self = [super initWithCoder:decoder];
+    if (!self) {
+        return nil;
+    }
+
+#if TARGET_OS_IOS  || TARGET_OS_TV || TARGET_OS_WATCH
+    NSNumber *imageScale = [decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(imageScale))];
+#if CGFLOAT_IS_DOUBLE
+    self.imageScale = [imageScale doubleValue];
+#else
+    self.imageScale = [imageScale floatValue];
+#endif
+
+    self.automaticallyInflatesResponseImage = [decoder decodeBoolForKey:NSStringFromSelector(@selector(automaticallyInflatesResponseImage))];
+#endif
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [super encodeWithCoder:coder];
+
+#if TARGET_OS_IOS || TARGET_OS_TV || TARGET_OS_WATCH
+    [coder encodeObject:@(self.imageScale) forKey:NSStringFromSelector(@selector(imageScale))];
+    [coder encodeBool:self.automaticallyInflatesResponseImage forKey:NSStringFromSelector(@selector(automaticallyInflatesResponseImage))];
+#endif
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFImageResponseSerializer *serializer = [super copyWithZone:zone];
+
+#if TARGET_OS_IOS || TARGET_OS_TV || TARGET_OS_WATCH
+    serializer.imageScale = self.imageScale;
+    serializer.automaticallyInflatesResponseImage = self.automaticallyInflatesResponseImage;
+#endif
+
+    return serializer;
+}
+
+@end
+
+#pragma mark -
+
+@interface AFCompoundResponseSerializer ()
+@property (readwrite, nonatomic, copy) NSArray *responseSerializers;
+@end
+
+@implementation AFCompoundResponseSerializer
+
++ (instancetype)compoundSerializerWithResponseSerializers:(NSArray *)responseSerializers {
+    AFCompoundResponseSerializer *serializer = [[self alloc] init];
+    serializer.responseSerializers = responseSerializers;
+
+    return serializer;
+}
+
+#pragma mark - AFURLResponseSerialization
+
+- (id)responseObjectForResponse:(NSURLResponse *)response
+                           data:(NSData *)data
+                          error:(NSError *__autoreleasing *)error
+{
+    for (id <AFURLResponseSerialization> serializer in self.responseSerializers) {
+        if (![serializer isKindOfClass:[AFHTTPResponseSerializer class]]) {
+            continue;
+        }
+
+        NSError *serializerError = nil;
+        id responseObject = [serializer responseObjectForResponse:response data:data error:&serializerError];
+        if (responseObject) {
+            if (error) {
+                *error = AFErrorWithUnderlyingError(serializerError, *error);
+            }
+
+            return responseObject;
+        }
+    }
+
+    return [super responseObjectForResponse:response data:data error:error];
+}
+
+#pragma mark - NSSecureCoding
+
++ (BOOL)supportsSecureCoding {
+    return YES;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    self = [super initWithCoder:decoder];
+    if (!self) {
+        return nil;
+    }
+
+    NSSet *classes = [NSSet setWithArray:@[[NSArray class], [AFHTTPResponseSerializer <AFURLResponseSerialization> class]]];
+    self.responseSerializers = [decoder decodeObjectOfClasses:classes forKey:NSStringFromSelector(@selector(responseSerializers))];
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [super encodeWithCoder:coder];
+
+    [coder encodeObject:self.responseSerializers forKey:NSStringFromSelector(@selector(responseSerializers))];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFCompoundResponseSerializer *serializer = [super copyWithZone:zone];
+    serializer.responseSerializers = self.responseSerializers;
+
+    return serializer;
+}
+
+@end

Pods/AFNetworking/LICENSE

@@ -0,0 +1,19 @@
+Copyright (c) 2011-2020 Alamofire Software Foundation (http://alamofire.org/)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

Pods/AFNetworking/README.md

@@ -0,0 +1,298 @@
+<p align="center" >
+  <img src="https://raw.github.com/AFNetworking/AFNetworking/assets/afnetworking-logo.png" alt="AFNetworking" title="AFNetworking">
+</p>
+
+[![Build Status](https://github.com/AFNetworking/AFNetworking/workflows/AFNetworking%20CI/badge.svg?branch=master)](https://github.com/AFNetworking/AFNetworking/actions)
+[![CocoaPods Compatible](https://img.shields.io/cocoapods/v/AFNetworking.svg)](https://img.shields.io/cocoapods/v/AFNetworking.svg)
+[![Carthage Compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)
+[![Platform](https://img.shields.io/cocoapods/p/AFNetworking.svg?style=flat)](http://cocoadocs.org/docsets/AFNetworking)
+[![Twitter](https://img.shields.io/badge/twitter-@AFNetworking-blue.svg?style=flat)](http://twitter.com/AFNetworking)
+
+AFNetworking is a delightful networking library for iOS, macOS, watchOS, and tvOS. It's built on top of the [Foundation URL Loading System](https://developer.apple.com/documentation/foundation/url_loading_system), extending the powerful high-level networking abstractions built into Cocoa. It has a modular architecture with well-designed, feature-rich APIs that are a joy to use.
+
+Perhaps the most important feature of all, however, is the amazing community of developers who use and contribute to AFNetworking every day. AFNetworking powers some of the most popular and critically-acclaimed apps on the iPhone, iPad, and Mac.
+
+## How To Get Started
+
+- [Download AFNetworking](https://github.com/AFNetworking/AFNetworking/archive/master.zip) and try out the included Mac and iPhone example apps
+- Read the ["Getting Started" guide](https://github.com/AFNetworking/AFNetworking/wiki/Getting-Started-with-AFNetworking), [FAQ](https://github.com/AFNetworking/AFNetworking/wiki/AFNetworking-FAQ), or [other articles on the Wiki](https://github.com/AFNetworking/AFNetworking/wiki)
+
+## Communication
+
+- If you **need help**, use [Stack Overflow](http://stackoverflow.com/questions/tagged/afnetworking). (Tag 'afnetworking')
+- If you'd like to **ask a general question**, use [Stack Overflow](http://stackoverflow.com/questions/tagged/afnetworking).
+- If you **found a bug**, _and can provide steps to reliably reproduce it_, open an issue.
+- If you **have a feature request**, open an issue.
+- If you **want to contribute**, submit a pull request.
+
+## Installation
+AFNetworking supports multiple methods for installing the library in a project.
+
+## Installation with CocoaPods
+
+To integrate AFNetworking into your Xcode project using CocoaPods, specify it in your `Podfile`:
+
+```ruby
+pod 'AFNetworking', '~> 4.0'
+```
+
+### Installation with Swift Package Manager
+
+Once you have your Swift package set up, adding AFNetworking as a dependency is as easy as adding it to the `dependencies` value of your `Package.swift`.
+
+```swift
+dependencies: [
+    .package(url: "https://github.com/AFNetworking/AFNetworking.git", .upToNextMajor(from: "4.0.0"))
+]
+```
+
+> Note: AFNetworking's Swift package does not include it's UIKit extensions.
+
+### Installation with Carthage
+
+[Carthage](https://github.com/Carthage/Carthage) is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks. To integrate AFNetworking, add the following to your `Cartfile`.
+
+```ogdl
+github "AFNetworking/AFNetworking" ~> 4.0
+```
+
+## Requirements
+
+| AFNetworking Version | Minimum iOS Target  | Minimum macOS Target  | Minimum watchOS Target  | Minimum tvOS Target  |                                   Notes                                   |
+|:--------------------:|:---------------------------:|:----------------------------:|:----------------------------:|:----------------------------:|:-------------------------------------------------------------------------:|
+| 4.x | iOS 9 | macOS 10.10 | watchOS 2.0 | tvOS 9.0 | Xcode 11+ is required. |
+| 3.x | iOS 7 | OS X 10.9 | watchOS 2.0 | tvOS 9.0 | Xcode 7+ is required. `NSURLConnectionOperation` support has been removed. |
+| 2.6 -> 2.6.3 | iOS 7 | OS X 10.9 | watchOS 2.0 | n/a | Xcode 7+ is required. |
+| 2.0 -> 2.5.4 | iOS 6 | OS X 10.8 | n/a | n/a | Xcode 5+ is required. `NSURLSession` subspec requires iOS 7 or OS X 10.9. |
+| 1.x | iOS 5 | Mac OS X 10.7 | n/a | n/a |
+| 0.10.x | iOS 4 | Mac OS X 10.6 | n/a | n/a |
+
+(macOS projects must support [64-bit with modern Cocoa runtime](https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/ObjCRuntimeGuide/Articles/ocrtVersionsPlatforms.html)).
+
+> Programming in Swift? Try [Alamofire](https://github.com/Alamofire/Alamofire) for a more conventional set of APIs.
+
+## Architecture
+
+### NSURLSession
+
+- `AFURLSessionManager`
+- `AFHTTPSessionManager`
+
+### Serialization
+
+* `<AFURLRequestSerialization>`
+  - `AFHTTPRequestSerializer`
+  - `AFJSONRequestSerializer`
+  - `AFPropertyListRequestSerializer`
+* `<AFURLResponseSerialization>`
+  - `AFHTTPResponseSerializer`
+  - `AFJSONResponseSerializer`
+  - `AFXMLParserResponseSerializer`
+  - `AFXMLDocumentResponseSerializer` _(macOS)_
+  - `AFPropertyListResponseSerializer`
+  - `AFImageResponseSerializer`
+  - `AFCompoundResponseSerializer`
+
+### Additional Functionality
+
+- `AFSecurityPolicy`
+- `AFNetworkReachabilityManager`
+
+## Usage
+
+### AFURLSessionManager
+
+`AFURLSessionManager` creates and manages an `NSURLSession` object based on a specified `NSURLSessionConfiguration` object, which conforms to `<NSURLSessionTaskDelegate>`, `<NSURLSessionDataDelegate>`, `<NSURLSessionDownloadDelegate>`, and `<NSURLSessionDelegate>`.
+
+#### Creating a Download Task
+
+```objective-c
+NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
+AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
+
+NSURL *URL = [NSURL URLWithString:@"http://example.com/download.zip"];
+NSURLRequest *request = [NSURLRequest requestWithURL:URL];
+
+NSURLSessionDownloadTask *downloadTask = [manager downloadTaskWithRequest:request progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {
+    NSURL *documentsDirectoryURL = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:nil];
+    return [documentsDirectoryURL URLByAppendingPathComponent:[response suggestedFilename]];
+} completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {
+    NSLog(@"File downloaded to: %@", filePath);
+}];
+[downloadTask resume];
+```
+
+#### Creating an Upload Task
+
+```objective-c
+NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
+AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
+
+NSURL *URL = [NSURL URLWithString:@"http://example.com/upload"];
+NSURLRequest *request = [NSURLRequest requestWithURL:URL];
+
+NSURL *filePath = [NSURL fileURLWithPath:@"file://path/to/image.png"];
+NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithRequest:request fromFile:filePath progress:nil completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
+    if (error) {
+        NSLog(@"Error: %@", error);
+    } else {
+        NSLog(@"Success: %@ %@", response, responseObject);
+    }
+}];
+[uploadTask resume];
+```
+
+#### Creating an Upload Task for a Multi-Part Request, with Progress
+
+```objective-c
+NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:@"http://example.com/upload" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
+        [formData appendPartWithFileURL:[NSURL fileURLWithPath:@"file://path/to/image.jpg"] name:@"file" fileName:@"filename.jpg" mimeType:@"image/jpeg" error:nil];
+    } error:nil];
+
+AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
+
+NSURLSessionUploadTask *uploadTask;
+uploadTask = [manager
+              uploadTaskWithStreamedRequest:request
+              progress:^(NSProgress * _Nonnull uploadProgress) {
+                  // This is not called back on the main queue.
+                  // You are responsible for dispatching to the main queue for UI updates
+                  dispatch_async(dispatch_get_main_queue(), ^{
+                      //Update the progress view
+                      [progressView setProgress:uploadProgress.fractionCompleted];
+                  });
+              }
+              completionHandler:^(NSURLResponse * _Nonnull response, id  _Nullable responseObject, NSError * _Nullable error) {
+                  if (error) {
+                      NSLog(@"Error: %@", error);
+                  } else {
+                      NSLog(@"%@ %@", response, responseObject);
+                  }
+              }];
+
+[uploadTask resume];
+```
+
+#### Creating a Data Task
+
+```objective-c
+NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
+AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
+
+NSURL *URL = [NSURL URLWithString:@"http://httpbin.org/get"];
+NSURLRequest *request = [NSURLRequest requestWithURL:URL];
+
+NSURLSessionDataTask *dataTask = [manager dataTaskWithRequest:request completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
+    if (error) {
+        NSLog(@"Error: %@", error);
+    } else {
+        NSLog(@"%@ %@", response, responseObject);
+    }
+}];
+[dataTask resume];
+```
+
+---
+
+### Request Serialization
+
+Request serializers create requests from URL strings, encoding parameters as either a query string or HTTP body.
+
+```objective-c
+NSString *URLString = @"http://example.com";
+NSDictionary *parameters = @{@"foo": @"bar", @"baz": @[@1, @2, @3]};
+```
+
+#### Query String Parameter Encoding
+
+```objective-c
+[[AFHTTPRequestSerializer serializer] requestWithMethod:@"GET" URLString:URLString parameters:parameters error:nil];
+```
+
+    GET http://example.com?foo=bar&baz[]=1&baz[]=2&baz[]=3
+
+#### URL Form Parameter Encoding
+
+```objective-c
+[[AFHTTPRequestSerializer serializer] requestWithMethod:@"POST" URLString:URLString parameters:parameters error:nil];
+```
+
+    POST http://example.com/
+    Content-Type: application/x-www-form-urlencoded
+
+    foo=bar&baz[]=1&baz[]=2&baz[]=3
+
+#### JSON Parameter Encoding
+
+```objective-c
+[[AFJSONRequestSerializer serializer] requestWithMethod:@"POST" URLString:URLString parameters:parameters error:nil];
+```
+
+    POST http://example.com/
+    Content-Type: application/json
+
+    {"foo": "bar", "baz": [1,2,3]}
+
+---
+
+### Network Reachability Manager
+
+`AFNetworkReachabilityManager` monitors the reachability of domains, and addresses for both WWAN and WiFi network interfaces.
+
+* Do not use Reachability to determine if the original request should be sent.
+	* You should try to send it.
+* You can use Reachability to determine when a request should be automatically retried.
+	* Although it may still fail, a Reachability notification that the connectivity is available is a good time to retry something.
+* Network reachability is a useful tool for determining why a request might have failed.
+	* After a network request has failed, telling the user they're offline is better than giving them a more technical but accurate error, such as "request timed out."
+
+See also [WWDC 2012 session 706, "Networking Best Practices."](https://developer.apple.com/videos/play/wwdc2012-706/).
+
+#### Shared Network Reachability
+
+```objective-c
+[[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
+    NSLog(@"Reachability: %@", AFStringFromNetworkReachabilityStatus(status));
+}];
+
+[[AFNetworkReachabilityManager sharedManager] startMonitoring];
+```
+
+---
+
+### Security Policy
+
+`AFSecurityPolicy` evaluates server trust against pinned X.509 certificates and public keys over secure connections.
+
+Adding pinned SSL certificates to your app helps prevent man-in-the-middle attacks and other vulnerabilities. Applications dealing with sensitive customer data or financial information are strongly encouraged to route all communication over an HTTPS connection with SSL pinning configured and enabled.
+
+#### Allowing Invalid SSL Certificates
+
+```objective-c
+AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
+manager.securityPolicy.allowInvalidCertificates = YES; // not recommended for production
+```
+
+---
+
+## Unit Tests
+
+AFNetworking includes a suite of unit tests within the Tests subdirectory. These tests can be run simply be executed the test action on the platform framework you would like to test.
+
+## Credits
+
+AFNetworking is owned and maintained by the [Alamofire Software Foundation](http://alamofire.org).
+
+AFNetworking was originally created by [Scott Raymond](https://github.com/sco/) and [Mattt Thompson](https://github.com/mattt/) in the development of [Gowalla for iPhone](http://en.wikipedia.org/wiki/Gowalla).
+
+AFNetworking's logo was designed by [Alan Defibaugh](http://www.alandefibaugh.com/).
+
+And most of all, thanks to AFNetworking's [growing list of contributors](https://github.com/AFNetworking/AFNetworking/contributors).
+
+### Security Disclosure
+
+If you believe you have identified a security vulnerability with AFNetworking, you should report it as soon as possible via email to security@alamofire.org. Please do not post it to a public issue tracker.
+
+## License
+
+AFNetworking is released under the MIT license. See [LICENSE](https://github.com/AFNetworking/AFNetworking/blob/master/LICENSE) for details.

Pods/AFNetworking/UIKit+AFNetworking/AFAutoPurgingImageCache.h

@@ -0,0 +1,160 @@
+// AFAutoPurgingImageCache.h
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <TargetConditionals.h>
+#import <Foundation/Foundation.h>
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ The `AFImageCache` protocol defines a set of APIs for adding, removing and fetching images from a cache synchronously.
+ */
+@protocol AFImageCache <NSObject>
+
+/**
+ Adds the image to the cache with the given identifier.
+
+ @param image The image to cache.
+ @param identifier The unique identifier for the image in the cache.
+ */
+- (void)addImage:(UIImage *)image withIdentifier:(NSString *)identifier;
+
+/**
+ Removes the image from the cache matching the given identifier.
+
+ @param identifier The unique identifier for the image in the cache.
+
+ @return A BOOL indicating whether or not the image was removed from the cache.
+ */
+- (BOOL)removeImageWithIdentifier:(NSString *)identifier;
+
+/**
+ Removes all images from the cache.
+
+ @return A BOOL indicating whether or not all images were removed from the cache.
+ */
+- (BOOL)removeAllImages;
+
+/**
+ Returns the image in the cache associated with the given identifier.
+
+ @param identifier The unique identifier for the image in the cache.
+
+ @return An image for the matching identifier, or nil.
+ */
+- (nullable UIImage *)imageWithIdentifier:(NSString *)identifier;
+@end
+
+
+/**
+ The `ImageRequestCache` protocol extends the `ImageCache` protocol by adding methods for adding, removing and fetching images from a cache given an `NSURLRequest` and additional identifier.
+ */
+@protocol AFImageRequestCache <AFImageCache>
+
+/**
+ Asks if the image should be cached using an identifier created from the request and additional identifier.
+ 
+ @param image The image to be cached.
+ @param request The unique URL request identifing the image asset.
+ @param identifier The additional identifier to apply to the URL request to identify the image.
+ 
+ @return A BOOL indicating whether or not the image should be added to the cache. YES will cache, NO will prevent caching.
+ */
+- (BOOL)shouldCacheImage:(UIImage *)image forRequest:(NSURLRequest *)request withAdditionalIdentifier:(nullable NSString *)identifier;
+
+/**
+ Adds the image to the cache using an identifier created from the request and additional identifier.
+
+ @param image The image to cache.
+ @param request The unique URL request identifing the image asset.
+ @param identifier The additional identifier to apply to the URL request to identify the image.
+ */
+- (void)addImage:(UIImage *)image forRequest:(NSURLRequest *)request withAdditionalIdentifier:(nullable NSString *)identifier;
+
+/**
+ Removes the image from the cache using an identifier created from the request and additional identifier.
+
+ @param request The unique URL request identifing the image asset.
+ @param identifier The additional identifier to apply to the URL request to identify the image.
+ 
+ @return A BOOL indicating whether or not all images were removed from the cache.
+ */
+- (BOOL)removeImageforRequest:(NSURLRequest *)request withAdditionalIdentifier:(nullable NSString *)identifier;
+
+/**
+ Returns the image from the cache associated with an identifier created from the request and additional identifier.
+
+ @param request The unique URL request identifing the image asset.
+ @param identifier The additional identifier to apply to the URL request to identify the image.
+
+ @return An image for the matching request and identifier, or nil.
+ */
+- (nullable UIImage *)imageforRequest:(NSURLRequest *)request withAdditionalIdentifier:(nullable NSString *)identifier;
+
+@end
+
+/**
+ The `AutoPurgingImageCache` in an in-memory image cache used to store images up to a given memory capacity. When the memory capacity is reached, the image cache is sorted by last access date, then the oldest image is continuously purged until the preferred memory usage after purge is met. Each time an image is accessed through the cache, the internal access date of the image is updated.
+ */
+@interface AFAutoPurgingImageCache : NSObject <AFImageRequestCache>
+
+/**
+ The total memory capacity of the cache in bytes.
+ */
+@property (nonatomic, assign) UInt64 memoryCapacity;
+
+/**
+ The preferred memory usage after purge in bytes. During a purge, images will be purged until the memory capacity drops below this limit.
+ */
+@property (nonatomic, assign) UInt64 preferredMemoryUsageAfterPurge;
+
+/**
+ The current total memory usage in bytes of all images stored within the cache.
+ */
+@property (nonatomic, assign, readonly) UInt64 memoryUsage;
+
+/**
+ Initialies the `AutoPurgingImageCache` instance with default values for memory capacity and preferred memory usage after purge limit. `memoryCapcity` defaults to `100 MB`. `preferredMemoryUsageAfterPurge` defaults to `60 MB`.
+
+ @return The new `AutoPurgingImageCache` instance.
+ */
+- (instancetype)init;
+
+/**
+ Initialies the `AutoPurgingImageCache` instance with the given memory capacity and preferred memory usage
+ after purge limit.
+
+ @param memoryCapacity The total memory capacity of the cache in bytes.
+ @param preferredMemoryCapacity The preferred memory usage after purge in bytes.
+
+ @return The new `AutoPurgingImageCache` instance.
+ */
+- (instancetype)initWithMemoryCapacity:(UInt64)memoryCapacity preferredMemoryCapacity:(UInt64)preferredMemoryCapacity;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif
+

Pods/AFNetworking/UIKit+AFNetworking/AFAutoPurgingImageCache.m

@@ -0,0 +1,205 @@
+// AFAutoPurgingImageCache.m
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_TV 
+
+#import "AFAutoPurgingImageCache.h"
+
+@interface AFCachedImage : NSObject
+
+@property (nonatomic, strong) UIImage *image;
+@property (nonatomic, copy) NSString *identifier;
+@property (nonatomic, assign) UInt64 totalBytes;
+@property (nonatomic, strong) NSDate *lastAccessDate;
+@property (nonatomic, assign) UInt64 currentMemoryUsage;
+
+@end
+
+@implementation AFCachedImage
+
+- (instancetype)initWithImage:(UIImage *)image identifier:(NSString *)identifier {
+    if (self = [self init]) {
+        self.image = image;
+        self.identifier = identifier;
+
+        CGSize imageSize = CGSizeMake(image.size.width * image.scale, image.size.height * image.scale);
+        CGFloat bytesPerPixel = 4.0;
+        CGFloat bytesPerSize = imageSize.width * imageSize.height;
+        self.totalBytes = (UInt64)bytesPerPixel * (UInt64)bytesPerSize;
+        self.lastAccessDate = [NSDate date];
+    }
+    return self;
+}
+
+- (UIImage *)accessImage {
+    self.lastAccessDate = [NSDate date];
+    return self.image;
+}
+
+- (NSString *)description {
+    NSString *descriptionString = [NSString stringWithFormat:@"Idenfitier: %@  lastAccessDate: %@ ", self.identifier, self.lastAccessDate];
+    return descriptionString;
+
+}
+
+@end
+
+@interface AFAutoPurgingImageCache ()
+@property (nonatomic, strong) NSMutableDictionary <NSString* , AFCachedImage*> *cachedImages;
+@property (nonatomic, assign) UInt64 currentMemoryUsage;
+@property (nonatomic, strong) dispatch_queue_t synchronizationQueue;
+@end
+
+@implementation AFAutoPurgingImageCache
+
+- (instancetype)init {
+    return [self initWithMemoryCapacity:100 * 1024 * 1024 preferredMemoryCapacity:60 * 1024 * 1024];
+}
+
+- (instancetype)initWithMemoryCapacity:(UInt64)memoryCapacity preferredMemoryCapacity:(UInt64)preferredMemoryCapacity {
+    if (self = [super init]) {
+        self.memoryCapacity = memoryCapacity;
+        self.preferredMemoryUsageAfterPurge = preferredMemoryCapacity;
+        self.cachedImages = [[NSMutableDictionary alloc] init];
+
+        NSString *queueName = [NSString stringWithFormat:@"com.alamofire.autopurgingimagecache-%@", [[NSUUID UUID] UUIDString]];
+        self.synchronizationQueue = dispatch_queue_create([queueName cStringUsingEncoding:NSASCIIStringEncoding], DISPATCH_QUEUE_CONCURRENT);
+
+        [[NSNotificationCenter defaultCenter]
+         addObserver:self
+         selector:@selector(removeAllImages)
+         name:UIApplicationDidReceiveMemoryWarningNotification
+         object:nil];
+
+    }
+    return self;
+}
+
+- (void)dealloc {
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
+}
+
+- (UInt64)memoryUsage {
+    __block UInt64 result = 0;
+    dispatch_sync(self.synchronizationQueue, ^{
+        result = self.currentMemoryUsage;
+    });
+    return result;
+}
+
+- (void)addImage:(UIImage *)image withIdentifier:(NSString *)identifier {
+    dispatch_barrier_async(self.synchronizationQueue, ^{
+        AFCachedImage *cacheImage = [[AFCachedImage alloc] initWithImage:image identifier:identifier];
+
+        AFCachedImage *previousCachedImage = self.cachedImages[identifier];
+        if (previousCachedImage != nil) {
+            self.currentMemoryUsage -= previousCachedImage.totalBytes;
+        }
+
+        self.cachedImages[identifier] = cacheImage;
+        self.currentMemoryUsage += cacheImage.totalBytes;
+    });
+
+    dispatch_barrier_async(self.synchronizationQueue, ^{
+        if (self.currentMemoryUsage > self.memoryCapacity) {
+            UInt64 bytesToPurge = self.currentMemoryUsage - self.preferredMemoryUsageAfterPurge;
+            NSMutableArray <AFCachedImage*> *sortedImages = [NSMutableArray arrayWithArray:self.cachedImages.allValues];
+            NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"lastAccessDate"
+                                                                           ascending:YES];
+            [sortedImages sortUsingDescriptors:@[sortDescriptor]];
+
+            UInt64 bytesPurged = 0;
+
+            for (AFCachedImage *cachedImage in sortedImages) {
+                [self.cachedImages removeObjectForKey:cachedImage.identifier];
+                bytesPurged += cachedImage.totalBytes;
+                if (bytesPurged >= bytesToPurge) {
+                    break;
+                }
+            }
+            self.currentMemoryUsage -= bytesPurged;
+        }
+    });
+}
+
+- (BOOL)removeImageWithIdentifier:(NSString *)identifier {
+    __block BOOL removed = NO;
+    dispatch_barrier_sync(self.synchronizationQueue, ^{
+        AFCachedImage *cachedImage = self.cachedImages[identifier];
+        if (cachedImage != nil) {
+            [self.cachedImages removeObjectForKey:identifier];
+            self.currentMemoryUsage -= cachedImage.totalBytes;
+            removed = YES;
+        }
+    });
+    return removed;
+}
+
+- (BOOL)removeAllImages {
+    __block BOOL removed = NO;
+    dispatch_barrier_sync(self.synchronizationQueue, ^{
+        if (self.cachedImages.count > 0) {
+            [self.cachedImages removeAllObjects];
+            self.currentMemoryUsage = 0;
+            removed = YES;
+        }
+    });
+    return removed;
+}
+
+- (nullable UIImage *)imageWithIdentifier:(NSString *)identifier {
+    __block UIImage *image = nil;
+    dispatch_sync(self.synchronizationQueue, ^{
+        AFCachedImage *cachedImage = self.cachedImages[identifier];
+        image = [cachedImage accessImage];
+    });
+    return image;
+}
+
+- (void)addImage:(UIImage *)image forRequest:(NSURLRequest *)request withAdditionalIdentifier:(NSString *)identifier {
+    [self addImage:image withIdentifier:[self imageCacheKeyFromURLRequest:request withAdditionalIdentifier:identifier]];
+}
+
+- (BOOL)removeImageforRequest:(NSURLRequest *)request withAdditionalIdentifier:(NSString *)identifier {
+    return [self removeImageWithIdentifier:[self imageCacheKeyFromURLRequest:request withAdditionalIdentifier:identifier]];
+}
+
+- (nullable UIImage *)imageforRequest:(NSURLRequest *)request withAdditionalIdentifier:(NSString *)identifier {
+    return [self imageWithIdentifier:[self imageCacheKeyFromURLRequest:request withAdditionalIdentifier:identifier]];
+}
+
+- (NSString *)imageCacheKeyFromURLRequest:(NSURLRequest *)request withAdditionalIdentifier:(NSString *)additionalIdentifier {
+    NSString *key = request.URL.absoluteString;
+    if (additionalIdentifier != nil) {
+        key = [key stringByAppendingString:additionalIdentifier];
+    }
+    return key;
+}
+
+- (BOOL)shouldCacheImage:(UIImage *)image forRequest:(NSURLRequest *)request withAdditionalIdentifier:(nullable NSString *)identifier {
+    return YES;
+}
+
+@end
+
+#endif

Pods/AFNetworking/UIKit+AFNetworking/AFImageDownloader.h

@@ -0,0 +1,171 @@
+// AFImageDownloader.h
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_TV 
+
+#import <Foundation/Foundation.h>
+#import "AFAutoPurgingImageCache.h"
+#import "AFHTTPSessionManager.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+typedef NS_ENUM(NSInteger, AFImageDownloadPrioritization) {
+    AFImageDownloadPrioritizationFIFO,
+    AFImageDownloadPrioritizationLIFO
+};
+
+/**
+ The `AFImageDownloadReceipt` is an object vended by the `AFImageDownloader` when starting a data task. It can be used to cancel active tasks running on the `AFImageDownloader` session. As a general rule, image data tasks should be cancelled using the `AFImageDownloadReceipt` instead of calling `cancel` directly on the `task` itself. The `AFImageDownloader` is optimized to handle duplicate task scenarios as well as pending versus active downloads.
+ */
+@interface AFImageDownloadReceipt : NSObject
+
+/**
+ The data task created by the `AFImageDownloader`.
+*/
+@property (nonatomic, strong) NSURLSessionDataTask *task;
+
+/**
+ The unique identifier for the success and failure blocks when duplicate requests are made.
+ */
+@property (nonatomic, strong) NSUUID *receiptID;
+@end
+
+/** The `AFImageDownloader` class is responsible for downloading images in parallel on a prioritized queue. Incoming downloads are added to the front or back of the queue depending on the download prioritization. Each downloaded image is cached in the underlying `NSURLCache` as well as the in-memory image cache. By default, any download request with a cached image equivalent in the image cache will automatically be served the cached image representation.
+ */
+@interface AFImageDownloader : NSObject
+
+/**
+ The image cache used to store all downloaded images in. `AFAutoPurgingImageCache` by default.
+ */
+@property (nonatomic, strong, nullable) id <AFImageRequestCache> imageCache;
+
+/**
+ The `AFHTTPSessionManager` used to download images. By default, this is configured with an `AFImageResponseSerializer`, and a shared `NSURLCache` for all image downloads.
+ */
+@property (nonatomic, strong) AFHTTPSessionManager *sessionManager;
+
+/**
+ Defines the order prioritization of incoming download requests being inserted into the queue. `AFImageDownloadPrioritizationFIFO` by default.
+ */
+@property (nonatomic, assign) AFImageDownloadPrioritization downloadPrioritization;
+
+/**
+ The shared default instance of `AFImageDownloader` initialized with default values.
+ */
++ (instancetype)defaultInstance;
+
+/**
+ Creates a default `NSURLCache` with common usage parameter values.
+
+ @returns The default `NSURLCache` instance.
+ */
++ (NSURLCache *)defaultURLCache;
+
+/**
+ The default `NSURLSessionConfiguration` with common usage parameter values.
+ */
++ (NSURLSessionConfiguration *)defaultURLSessionConfiguration;
+
+/**
+ Default initializer
+
+ @return An instance of `AFImageDownloader` initialized with default values.
+ */
+- (instancetype)init;
+
+/**
+ Initializer with specific `URLSessionConfiguration`
+ 
+ @param configuration The `NSURLSessionConfiguration` to be be used
+ 
+ @return An instance of `AFImageDownloader` initialized with default values and custom `NSURLSessionConfiguration`
+ */
+- (instancetype)initWithSessionConfiguration:(NSURLSessionConfiguration *)configuration;
+
+/**
+ Initializes the `AFImageDownloader` instance with the given session manager, download prioritization, maximum active download count and image cache.
+
+ @param sessionManager The session manager to use to download images.
+ @param downloadPrioritization The download prioritization of the download queue.
+ @param maximumActiveDownloads  The maximum number of active downloads allowed at any given time. Recommend `4`.
+ @param imageCache The image cache used to store all downloaded images in.
+
+ @return The new `AFImageDownloader` instance.
+ */
+- (instancetype)initWithSessionManager:(AFHTTPSessionManager *)sessionManager
+                downloadPrioritization:(AFImageDownloadPrioritization)downloadPrioritization
+                maximumActiveDownloads:(NSInteger)maximumActiveDownloads
+                            imageCache:(nullable id <AFImageRequestCache>)imageCache;
+
+/**
+ Creates a data task using the `sessionManager` instance for the specified URL request.
+
+ If the same data task is already in the queue or currently being downloaded, the success and failure blocks are
+ appended to the already existing task. Once the task completes, all success or failure blocks attached to the
+ task are executed in the order they were added.
+
+ @param request The URL request.
+ @param success A block to be executed when the image data task finishes successfully. This block has no return value and takes three arguments: the request sent from the client, the response received from the server, and the image created from the response data of request. If the image was returned from cache, the response parameter will be `nil`.
+ @param failure A block object to be executed when the image data task finishes unsuccessfully, or that finishes successfully. This block has no return value and takes three arguments: the request sent from the client, the response received from the server, and the error object describing the network or parsing error that occurred.
+
+ @return The image download receipt for the data task if available. `nil` if the image is stored in the cache.
+ cache and the URL request cache policy allows the cache to be used.
+ */
+- (nullable AFImageDownloadReceipt *)downloadImageForURLRequest:(NSURLRequest *)request
+                                                        success:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse  * _Nullable response, UIImage *responseObject))success
+                                                        failure:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, NSError *error))failure;
+
+/**
+ Creates a data task using the `sessionManager` instance for the specified URL request.
+
+ If the same data task is already in the queue or currently being downloaded, the success and failure blocks are
+ appended to the already existing task. Once the task completes, all success or failure blocks attached to the
+ task are executed in the order they were added.
+
+ @param request The URL request.
+ @param receiptID The identifier to use for the download receipt that will be created for this request. This must be a unique identifier that does not represent any other request.
+ @param success A block to be executed when the image data task finishes successfully. This block has no return value and takes three arguments: the request sent from the client, the response received from the server, and the image created from the response data of request. If the image was returned from cache, the response parameter will be `nil`.
+ @param failure A block object to be executed when the image data task finishes unsuccessfully, or that finishes successfully. This block has no return value and takes three arguments: the request sent from the client, the response received from the server, and the error object describing the network or parsing error that occurred.
+
+ @return The image download receipt for the data task if available. `nil` if the image is stored in the cache.
+ cache and the URL request cache policy allows the cache to be used.
+ */
+- (nullable AFImageDownloadReceipt *)downloadImageForURLRequest:(NSURLRequest *)request
+                                                 withReceiptID:(NSUUID *)receiptID
+                                                        success:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse  * _Nullable response, UIImage *responseObject))success
+                                                        failure:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, NSError *error))failure;
+
+/**
+ Cancels the data task in the receipt by removing the corresponding success and failure blocks and cancelling the data task if necessary.
+
+ If the data task is pending in the queue, it will be cancelled if no other success and failure blocks are registered with the data task. If the data task is currently executing or is already completed, the success and failure blocks are removed and will not be called when the task finishes.
+
+ @param imageDownloadReceipt The image download receipt to cancel.
+ */
+- (void)cancelTaskForImageDownloadReceipt:(AFImageDownloadReceipt *)imageDownloadReceipt;
+
+@end
+
+#endif
+
+NS_ASSUME_NONNULL_END

Pods/AFNetworking/UIKit+AFNetworking/AFImageDownloader.m

@@ -0,0 +1,421 @@
+// AFImageDownloader.m
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+
+#import "AFImageDownloader.h"
+#import "AFHTTPSessionManager.h"
+
+@interface AFImageDownloaderResponseHandler : NSObject
+@property (nonatomic, strong) NSUUID *uuid;
+@property (nonatomic, copy) void (^successBlock)(NSURLRequest *, NSHTTPURLResponse *, UIImage *);
+@property (nonatomic, copy) void (^failureBlock)(NSURLRequest *, NSHTTPURLResponse *, NSError *);
+@end
+
+@implementation AFImageDownloaderResponseHandler
+
+- (instancetype)initWithUUID:(NSUUID *)uuid
+                     success:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, UIImage *responseObject))success
+                     failure:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, NSError *error))failure {
+    if (self = [self init]) {
+        self.uuid = uuid;
+        self.successBlock = success;
+        self.failureBlock = failure;
+    }
+    return self;
+}
+
+- (NSString *)description {
+    return [NSString stringWithFormat: @"<AFImageDownloaderResponseHandler>UUID: %@", [self.uuid UUIDString]];
+}
+
+@end
+
+@interface AFImageDownloaderMergedTask : NSObject
+@property (nonatomic, strong) NSString *URLIdentifier;
+@property (nonatomic, strong) NSUUID *identifier;
+@property (nonatomic, strong) NSURLSessionDataTask *task;
+@property (nonatomic, strong) NSMutableArray <AFImageDownloaderResponseHandler*> *responseHandlers;
+
+@end
+
+@implementation AFImageDownloaderMergedTask
+
+- (instancetype)initWithURLIdentifier:(NSString *)URLIdentifier identifier:(NSUUID *)identifier task:(NSURLSessionDataTask *)task {
+    if (self = [self init]) {
+        self.URLIdentifier = URLIdentifier;
+        self.task = task;
+        self.identifier = identifier;
+        self.responseHandlers = [[NSMutableArray alloc] init];
+    }
+    return self;
+}
+
+- (void)addResponseHandler:(AFImageDownloaderResponseHandler *)handler {
+    [self.responseHandlers addObject:handler];
+}
+
+- (void)removeResponseHandler:(AFImageDownloaderResponseHandler *)handler {
+    [self.responseHandlers removeObject:handler];
+}
+
+@end
+
+@implementation AFImageDownloadReceipt
+
+- (instancetype)initWithReceiptID:(NSUUID *)receiptID task:(NSURLSessionDataTask *)task {
+    if (self = [self init]) {
+        self.receiptID = receiptID;
+        self.task = task;
+    }
+    return self;
+}
+
+@end
+
+@interface AFImageDownloader ()
+
+@property (nonatomic, strong) dispatch_queue_t synchronizationQueue;
+@property (nonatomic, strong) dispatch_queue_t responseQueue;
+
+@property (nonatomic, assign) NSInteger maximumActiveDownloads;
+@property (nonatomic, assign) NSInteger activeRequestCount;
+
+@property (nonatomic, strong) NSMutableArray *queuedMergedTasks;
+@property (nonatomic, strong) NSMutableDictionary *mergedTasks;
+
+@end
+
+@implementation AFImageDownloader
+
++ (NSURLCache *)defaultURLCache {
+    NSUInteger memoryCapacity = 20 * 1024 * 1024; // 20MB
+    NSUInteger diskCapacity = 150 * 1024 * 1024; // 150MB
+    NSURL *cacheURL = [[[NSFileManager defaultManager] URLForDirectory:NSCachesDirectory
+                                                              inDomain:NSUserDomainMask
+                                                     appropriateForURL:nil
+                                                                create:YES
+                                                                 error:nil]
+                       URLByAppendingPathComponent:@"com.alamofire.imagedownloader"];
+    
+#if TARGET_OS_MACCATALYST
+    return [[NSURLCache alloc] initWithMemoryCapacity:memoryCapacity
+                                         diskCapacity:diskCapacity
+                                         directoryURL:cacheURL];
+#else
+    return [[NSURLCache alloc] initWithMemoryCapacity:memoryCapacity
+                                         diskCapacity:diskCapacity
+                                             diskPath:[cacheURL path]];
+#endif
+}
+
++ (NSURLSessionConfiguration *)defaultURLSessionConfiguration {
+    NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
+
+    //TODO set the default HTTP headers
+
+    configuration.HTTPShouldSetCookies = YES;
+    configuration.HTTPShouldUsePipelining = NO;
+
+    configuration.requestCachePolicy = NSURLRequestUseProtocolCachePolicy;
+    configuration.allowsCellularAccess = YES;
+    configuration.timeoutIntervalForRequest = 60.0;
+    configuration.URLCache = [AFImageDownloader defaultURLCache];
+
+    return configuration;
+}
+
+- (instancetype)init {
+    NSURLSessionConfiguration *defaultConfiguration = [self.class defaultURLSessionConfiguration];
+    return [self initWithSessionConfiguration:defaultConfiguration];
+}
+
+- (instancetype)initWithSessionConfiguration:(NSURLSessionConfiguration *)configuration {
+    AFHTTPSessionManager *sessionManager = [[AFHTTPSessionManager alloc] initWithSessionConfiguration:configuration];
+    sessionManager.responseSerializer = [AFImageResponseSerializer serializer];
+
+    return [self initWithSessionManager:sessionManager
+                 downloadPrioritization:AFImageDownloadPrioritizationFIFO
+                 maximumActiveDownloads:4
+                             imageCache:[[AFAutoPurgingImageCache alloc] init]];
+}
+
+- (instancetype)initWithSessionManager:(AFHTTPSessionManager *)sessionManager
+                downloadPrioritization:(AFImageDownloadPrioritization)downloadPrioritization
+                maximumActiveDownloads:(NSInteger)maximumActiveDownloads
+                            imageCache:(id <AFImageRequestCache>)imageCache {
+    if (self = [super init]) {
+        self.sessionManager = sessionManager;
+
+        self.downloadPrioritization = downloadPrioritization;
+        self.maximumActiveDownloads = maximumActiveDownloads;
+        self.imageCache = imageCache;
+
+        self.queuedMergedTasks = [[NSMutableArray alloc] init];
+        self.mergedTasks = [[NSMutableDictionary alloc] init];
+        self.activeRequestCount = 0;
+
+        NSString *name = [NSString stringWithFormat:@"com.alamofire.imagedownloader.synchronizationqueue-%@", [[NSUUID UUID] UUIDString]];
+        self.synchronizationQueue = dispatch_queue_create([name cStringUsingEncoding:NSASCIIStringEncoding], DISPATCH_QUEUE_SERIAL);
+
+        name = [NSString stringWithFormat:@"com.alamofire.imagedownloader.responsequeue-%@", [[NSUUID UUID] UUIDString]];
+        self.responseQueue = dispatch_queue_create([name cStringUsingEncoding:NSASCIIStringEncoding], DISPATCH_QUEUE_CONCURRENT);
+    }
+
+    return self;
+}
+
++ (instancetype)defaultInstance {
+    static AFImageDownloader *sharedInstance = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        sharedInstance = [[self alloc] init];
+    });
+    return sharedInstance;
+}
+
+- (nullable AFImageDownloadReceipt *)downloadImageForURLRequest:(NSURLRequest *)request
+                                                        success:(void (^)(NSURLRequest * _Nonnull, NSHTTPURLResponse * _Nullable, UIImage * _Nonnull))success
+                                                        failure:(void (^)(NSURLRequest * _Nonnull, NSHTTPURLResponse * _Nullable, NSError * _Nonnull))failure {
+    return [self downloadImageForURLRequest:request withReceiptID:[NSUUID UUID] success:success failure:failure];
+}
+
+- (nullable AFImageDownloadReceipt *)downloadImageForURLRequest:(NSURLRequest *)request
+                                                  withReceiptID:(nonnull NSUUID *)receiptID
+                                                        success:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse  * _Nullable response, UIImage *responseObject))success
+                                                        failure:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, NSError *error))failure {
+    __block NSURLSessionDataTask *task = nil;
+    dispatch_sync(self.synchronizationQueue, ^{
+        NSString *URLIdentifier = request.URL.absoluteString;
+        if (URLIdentifier == nil) {
+            if (failure) {
+                NSError *error = [NSError errorWithDomain:NSURLErrorDomain code:NSURLErrorBadURL userInfo:nil];
+                dispatch_async(dispatch_get_main_queue(), ^{
+                    failure(request, nil, error);
+                });
+            }
+            return;
+        }
+
+        // 1) Append the success and failure blocks to a pre-existing request if it already exists
+        AFImageDownloaderMergedTask *existingMergedTask = self.mergedTasks[URLIdentifier];
+        if (existingMergedTask != nil) {
+            AFImageDownloaderResponseHandler *handler = [[AFImageDownloaderResponseHandler alloc] initWithUUID:receiptID success:success failure:failure];
+            [existingMergedTask addResponseHandler:handler];
+            task = existingMergedTask.task;
+            return;
+        }
+
+        // 2) Attempt to load the image from the image cache if the cache policy allows it
+        switch (request.cachePolicy) {
+            case NSURLRequestUseProtocolCachePolicy:
+            case NSURLRequestReturnCacheDataElseLoad:
+            case NSURLRequestReturnCacheDataDontLoad: {
+                UIImage *cachedImage = [self.imageCache imageforRequest:request withAdditionalIdentifier:nil];
+                if (cachedImage != nil) {
+                    if (success) {
+                        dispatch_async(dispatch_get_main_queue(), ^{
+                            success(request, nil, cachedImage);
+                        });
+                    }
+                    return;
+                }
+                break;
+            }
+            default:
+                break;
+        }
+
+        // 3) Create the request and set up authentication, validation and response serialization
+        NSUUID *mergedTaskIdentifier = [NSUUID UUID];
+        NSURLSessionDataTask *createdTask;
+        __weak __typeof__(self) weakSelf = self;
+
+        createdTask = [self.sessionManager
+                       dataTaskWithRequest:request
+                       uploadProgress:nil
+                       downloadProgress:nil
+                       completionHandler:^(NSURLResponse * _Nonnull response, id  _Nullable responseObject, NSError * _Nullable error) {
+                           dispatch_async(self.responseQueue, ^{
+                               __strong __typeof__(weakSelf) strongSelf = weakSelf;
+                               AFImageDownloaderMergedTask *mergedTask = [strongSelf safelyGetMergedTask:URLIdentifier];
+                               if ([mergedTask.identifier isEqual:mergedTaskIdentifier]) {
+                                   mergedTask = [strongSelf safelyRemoveMergedTaskWithURLIdentifier:URLIdentifier];
+                                   if (error) {
+                                       for (AFImageDownloaderResponseHandler *handler in mergedTask.responseHandlers) {
+                                           if (handler.failureBlock) {
+                                               dispatch_async(dispatch_get_main_queue(), ^{
+                                                   handler.failureBlock(request, (NSHTTPURLResponse *)response, error);
+                                               });
+                                           }
+                                       }
+                                   } else {
+                                       if ([strongSelf.imageCache shouldCacheImage:responseObject forRequest:request withAdditionalIdentifier:nil]) {
+                                           [strongSelf.imageCache addImage:responseObject forRequest:request withAdditionalIdentifier:nil];
+                                       }
+
+                                       for (AFImageDownloaderResponseHandler *handler in mergedTask.responseHandlers) {
+                                           if (handler.successBlock) {
+                                               dispatch_async(dispatch_get_main_queue(), ^{
+                                                   handler.successBlock(request, (NSHTTPURLResponse *)response, responseObject);
+                                               });
+                                           }
+                                       }
+                                       
+                                   }
+                               }
+                               [strongSelf safelyDecrementActiveTaskCount];
+                               [strongSelf safelyStartNextTaskIfNecessary];
+                           });
+                       }];
+
+        // 4) Store the response handler for use when the request completes
+        AFImageDownloaderResponseHandler *handler = [[AFImageDownloaderResponseHandler alloc] initWithUUID:receiptID
+                                                                                                   success:success
+                                                                                                   failure:failure];
+        AFImageDownloaderMergedTask *mergedTask = [[AFImageDownloaderMergedTask alloc]
+                                                   initWithURLIdentifier:URLIdentifier
+                                                   identifier:mergedTaskIdentifier
+                                                   task:createdTask];
+        [mergedTask addResponseHandler:handler];
+        self.mergedTasks[URLIdentifier] = mergedTask;
+
+        // 5) Either start the request or enqueue it depending on the current active request count
+        if ([self isActiveRequestCountBelowMaximumLimit]) {
+            [self startMergedTask:mergedTask];
+        } else {
+            [self enqueueMergedTask:mergedTask];
+        }
+
+        task = mergedTask.task;
+    });
+    if (task) {
+        return [[AFImageDownloadReceipt alloc] initWithReceiptID:receiptID task:task];
+    } else {
+        return nil;
+    }
+}
+
+- (void)cancelTaskForImageDownloadReceipt:(AFImageDownloadReceipt *)imageDownloadReceipt {
+    dispatch_sync(self.synchronizationQueue, ^{
+        NSString *URLIdentifier = imageDownloadReceipt.task.originalRequest.URL.absoluteString;
+        AFImageDownloaderMergedTask *mergedTask = self.mergedTasks[URLIdentifier];
+        NSUInteger index = [mergedTask.responseHandlers indexOfObjectPassingTest:^BOOL(AFImageDownloaderResponseHandler * _Nonnull handler, __unused NSUInteger idx, __unused BOOL * _Nonnull stop) {
+            return handler.uuid == imageDownloadReceipt.receiptID;
+        }];
+
+        if (index != NSNotFound) {
+            AFImageDownloaderResponseHandler *handler = mergedTask.responseHandlers[index];
+            [mergedTask removeResponseHandler:handler];
+            NSString *failureReason = [NSString stringWithFormat:@"ImageDownloader cancelled URL request: %@",imageDownloadReceipt.task.originalRequest.URL.absoluteString];
+            NSDictionary *userInfo = @{NSLocalizedFailureReasonErrorKey:failureReason};
+            NSError *error = [NSError errorWithDomain:NSURLErrorDomain code:NSURLErrorCancelled userInfo:userInfo];
+            if (handler.failureBlock) {
+                dispatch_async(dispatch_get_main_queue(), ^{
+                    handler.failureBlock(imageDownloadReceipt.task.originalRequest, nil, error);
+                });
+            }
+        }
+
+        if (mergedTask.responseHandlers.count == 0) {
+            [mergedTask.task cancel];
+            [self removeMergedTaskWithURLIdentifier:URLIdentifier];
+        }
+    });
+}
+
+- (AFImageDownloaderMergedTask *)safelyRemoveMergedTaskWithURLIdentifier:(NSString *)URLIdentifier {
+    __block AFImageDownloaderMergedTask *mergedTask = nil;
+    dispatch_sync(self.synchronizationQueue, ^{
+        mergedTask = [self removeMergedTaskWithURLIdentifier:URLIdentifier];
+    });
+    return mergedTask;
+}
+
+//This method should only be called from safely within the synchronizationQueue
+- (AFImageDownloaderMergedTask *)removeMergedTaskWithURLIdentifier:(NSString *)URLIdentifier {
+    AFImageDownloaderMergedTask *mergedTask = self.mergedTasks[URLIdentifier];
+    [self.mergedTasks removeObjectForKey:URLIdentifier];
+    return mergedTask;
+}
+
+- (void)safelyDecrementActiveTaskCount {
+    dispatch_sync(self.synchronizationQueue, ^{
+        if (self.activeRequestCount > 0) {
+            self.activeRequestCount -= 1;
+        }
+    });
+}
+
+- (void)safelyStartNextTaskIfNecessary {
+    dispatch_sync(self.synchronizationQueue, ^{
+        if ([self isActiveRequestCountBelowMaximumLimit]) {
+            while (self.queuedMergedTasks.count > 0) {
+                AFImageDownloaderMergedTask *mergedTask = [self dequeueMergedTask];
+                if (mergedTask.task.state == NSURLSessionTaskStateSuspended) {
+                    [self startMergedTask:mergedTask];
+                    break;
+                }
+            }
+        }
+    });
+}
+
+- (void)startMergedTask:(AFImageDownloaderMergedTask *)mergedTask {
+    [mergedTask.task resume];
+    ++self.activeRequestCount;
+}
+
+- (void)enqueueMergedTask:(AFImageDownloaderMergedTask *)mergedTask {
+    switch (self.downloadPrioritization) {
+        case AFImageDownloadPrioritizationFIFO:
+            [self.queuedMergedTasks addObject:mergedTask];
+            break;
+        case AFImageDownloadPrioritizationLIFO:
+            [self.queuedMergedTasks insertObject:mergedTask atIndex:0];
+            break;
+    }
+}
+
+- (AFImageDownloaderMergedTask *)dequeueMergedTask {
+    AFImageDownloaderMergedTask *mergedTask = nil;
+    mergedTask = [self.queuedMergedTasks firstObject];
+    [self.queuedMergedTasks removeObject:mergedTask];
+    return mergedTask;
+}
+
+- (BOOL)isActiveRequestCountBelowMaximumLimit {
+    return self.activeRequestCount < self.maximumActiveDownloads;
+}
+
+- (AFImageDownloaderMergedTask *)safelyGetMergedTask:(NSString *)URLIdentifier {
+    __block AFImageDownloaderMergedTask *mergedTask;
+    dispatch_sync(self.synchronizationQueue, ^(){
+        mergedTask = self.mergedTasks[URLIdentifier];
+    });
+    return mergedTask;
+}
+
+@end
+
+#endif

Pods/AFNetworking/UIKit+AFNetworking/AFNetworkActivityIndicatorManager.h

@@ -0,0 +1,103 @@
+// AFNetworkActivityIndicatorManager.h
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <Foundation/Foundation.h>
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ `AFNetworkActivityIndicatorManager` manages the state of the network activity indicator in the status bar. When enabled, it will listen for notifications indicating that a session task has started or finished, and start or stop animating the indicator accordingly. The number of active requests is incremented and decremented much like a stack or a semaphore, and the activity indicator will animate so long as that number is greater than zero.
+
+ You should enable the shared instance of `AFNetworkActivityIndicatorManager` when your application finishes launching. In `AppDelegate application:didFinishLaunchingWithOptions:` you can do so with the following code:
+
+    [[AFNetworkActivityIndicatorManager sharedManager] setEnabled:YES];
+
+ By setting `enabled` to `YES` for `sharedManager`, the network activity indicator will show and hide automatically as requests start and finish. You should not ever need to call `incrementActivityCount` or `decrementActivityCount` yourself.
+
+ See the Apple Human Interface Guidelines section about the Network Activity Indicator for more information:
+ http://developer.apple.com/library/iOS/#documentation/UserExperience/Conceptual/MobileHIG/UIElementGuidelines/UIElementGuidelines.html#//apple_ref/doc/uid/TP40006556-CH13-SW44
+ */
+NS_EXTENSION_UNAVAILABLE_IOS("Use view controller based solutions where appropriate instead.")
+@interface AFNetworkActivityIndicatorManager : NSObject
+
+/**
+ A Boolean value indicating whether the manager is enabled.
+
+ If YES, the manager will change status bar network activity indicator according to network operation notifications it receives. The default value is NO.
+ */
+@property (nonatomic, assign, getter = isEnabled) BOOL enabled;
+
+/**
+ A Boolean value indicating whether the network activity indicator manager is currently active.
+*/
+@property (readonly, nonatomic, assign, getter=isNetworkActivityIndicatorVisible) BOOL networkActivityIndicatorVisible;
+
+/**
+ A time interval indicating the minimum duration of networking activity that should occur before the activity indicator is displayed. The default value 1 second. If the network activity indicator should be displayed immediately when network activity occurs, this value should be set to 0 seconds.
+ 
+ Apple's HIG describes the following:
+
+ > Display the network activity indicator to provide feedback when your app accesses the network for more than a couple of seconds. If the operation finishes sooner than that, you don’t have to show the network activity indicator, because the indicator is likely to disappear before users notice its presence.
+
+ */
+@property (nonatomic, assign) NSTimeInterval activationDelay;
+
+/**
+ A time interval indicating the duration of time of no networking activity required before the activity indicator is disabled. This allows for continuous display of the network activity indicator across multiple requests. The default value is 0.17 seconds.
+ */
+
+@property (nonatomic, assign) NSTimeInterval completionDelay;
+
+/**
+ Returns the shared network activity indicator manager object for the system.
+
+ @return The systemwide network activity indicator manager.
+ */
++ (instancetype)sharedManager;
+
+/**
+ Increments the number of active network requests. If this number was zero before incrementing, this will start animating the status bar network activity indicator.
+ */
+- (void)incrementActivityCount;
+
+/**
+ Decrements the number of active network requests. If this number becomes zero after decrementing, this will stop animating the status bar network activity indicator.
+ */
+- (void)decrementActivityCount;
+
+/**
+ Set the a custom method to be executed when the network activity indicator manager should be hidden/shown. By default, this is null, and the UIApplication Network Activity Indicator will be managed automatically. If this block is set, it is the responsiblity of the caller to manager the network activity indicator going forward.
+
+ @param block A block to be executed when the network activity indicator status changes.
+ */
+- (void)setNetworkingActivityActionWithBlock:(nullable void (^)(BOOL networkActivityIndicatorVisible))block;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif

Pods/AFNetworking/UIKit+AFNetworking/AFNetworkActivityIndicatorManager.m

@@ -0,0 +1,239 @@
+// AFNetworkActivityIndicatorManager.m
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import "AFNetworkActivityIndicatorManager.h"
+
+#if TARGET_OS_IOS
+#import "AFURLSessionManager.h"
+
+typedef NS_ENUM(NSInteger, AFNetworkActivityManagerState) {
+    AFNetworkActivityManagerStateNotActive,
+    AFNetworkActivityManagerStateDelayingStart,
+    AFNetworkActivityManagerStateActive,
+    AFNetworkActivityManagerStateDelayingEnd
+};
+
+static NSTimeInterval const kDefaultAFNetworkActivityManagerActivationDelay = 1.0;
+static NSTimeInterval const kDefaultAFNetworkActivityManagerCompletionDelay = 0.17;
+
+static NSURLRequest * AFNetworkRequestFromNotification(NSNotification *notification) {
+    if ([[notification object] respondsToSelector:@selector(originalRequest)]) {
+        return [(NSURLSessionTask *)[notification object] originalRequest];
+    } else {
+        return nil;
+    }
+}
+
+typedef void (^AFNetworkActivityActionBlock)(BOOL networkActivityIndicatorVisible);
+
+@interface AFNetworkActivityIndicatorManager ()
+@property (readwrite, nonatomic, assign) NSInteger activityCount;
+@property (readwrite, nonatomic, strong) NSTimer *activationDelayTimer;
+@property (readwrite, nonatomic, strong) NSTimer *completionDelayTimer;
+@property (readonly, nonatomic, getter = isNetworkActivityOccurring) BOOL networkActivityOccurring;
+@property (nonatomic, copy) AFNetworkActivityActionBlock networkActivityActionBlock;
+@property (nonatomic, assign) AFNetworkActivityManagerState currentState;
+@property (nonatomic, assign, getter=isNetworkActivityIndicatorVisible) BOOL networkActivityIndicatorVisible;
+
+- (void)updateCurrentStateForNetworkActivityChange;
+@end
+
+@implementation AFNetworkActivityIndicatorManager
+
++ (instancetype)sharedManager {
+    static AFNetworkActivityIndicatorManager *_sharedManager = nil;
+    static dispatch_once_t oncePredicate;
+    dispatch_once(&oncePredicate, ^{
+        _sharedManager = [[self alloc] init];
+    });
+
+    return _sharedManager;
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+    self.currentState = AFNetworkActivityManagerStateNotActive;
+    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(networkRequestDidStart:) name:AFNetworkingTaskDidResumeNotification object:nil];
+    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(networkRequestDidFinish:) name:AFNetworkingTaskDidSuspendNotification object:nil];
+    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(networkRequestDidFinish:) name:AFNetworkingTaskDidCompleteNotification object:nil];
+    self.activationDelay = kDefaultAFNetworkActivityManagerActivationDelay;
+    self.completionDelay = kDefaultAFNetworkActivityManagerCompletionDelay;
+
+    return self;
+}
+
+- (void)dealloc {
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
+
+    [_activationDelayTimer invalidate];
+    [_completionDelayTimer invalidate];
+}
+
+- (void)setEnabled:(BOOL)enabled {
+    _enabled = enabled;
+    if (enabled == NO) {
+        [self setCurrentState:AFNetworkActivityManagerStateNotActive];
+    }
+}
+
+- (void)setNetworkingActivityActionWithBlock:(void (^)(BOOL networkActivityIndicatorVisible))block {
+    self.networkActivityActionBlock = block;
+}
+
+- (BOOL)isNetworkActivityOccurring {
+    @synchronized(self) {
+        return self.activityCount > 0;
+    }
+}
+
+- (void)setNetworkActivityIndicatorVisible:(BOOL)networkActivityIndicatorVisible {
+    if (_networkActivityIndicatorVisible != networkActivityIndicatorVisible) {
+        @synchronized(self) {
+            _networkActivityIndicatorVisible = networkActivityIndicatorVisible;
+        }
+        if (self.networkActivityActionBlock) {
+            self.networkActivityActionBlock(networkActivityIndicatorVisible);
+        } else {
+            [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:networkActivityIndicatorVisible];
+        }
+    }
+}
+
+
+- (void)incrementActivityCount {
+    @synchronized(self) {
+        self.activityCount++;
+    }
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self updateCurrentStateForNetworkActivityChange];
+    });
+}
+
+- (void)decrementActivityCount {
+    @synchronized(self) {
+        self.activityCount = MAX(_activityCount - 1, 0);
+    }
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self updateCurrentStateForNetworkActivityChange];
+    });
+}
+
+- (void)networkRequestDidStart:(NSNotification *)notification {
+    if ([AFNetworkRequestFromNotification(notification) URL]) {
+        [self incrementActivityCount];
+    }
+}
+
+- (void)networkRequestDidFinish:(NSNotification *)notification {
+    if ([AFNetworkRequestFromNotification(notification) URL]) {
+        [self decrementActivityCount];
+    }
+}
+
+#pragma mark - Internal State Management
+- (void)setCurrentState:(AFNetworkActivityManagerState)currentState {
+    @synchronized(self) {
+        if (_currentState != currentState) {
+            _currentState = currentState;
+            switch (currentState) {
+                case AFNetworkActivityManagerStateNotActive:
+                    [self cancelActivationDelayTimer];
+                    [self cancelCompletionDelayTimer];
+                    [self setNetworkActivityIndicatorVisible:NO];
+                    break;
+                case AFNetworkActivityManagerStateDelayingStart:
+                    [self startActivationDelayTimer];
+                    break;
+                case AFNetworkActivityManagerStateActive:
+                    [self cancelCompletionDelayTimer];
+                    [self setNetworkActivityIndicatorVisible:YES];
+                    break;
+                case AFNetworkActivityManagerStateDelayingEnd:
+                    [self startCompletionDelayTimer];
+                    break;
+            }
+        }
+    }
+}
+
+- (void)updateCurrentStateForNetworkActivityChange {
+    if (self.enabled) {
+        switch (self.currentState) {
+            case AFNetworkActivityManagerStateNotActive:
+                if (self.isNetworkActivityOccurring) {
+                    [self setCurrentState:AFNetworkActivityManagerStateDelayingStart];
+                }
+                break;
+            case AFNetworkActivityManagerStateDelayingStart:
+                //No op. Let the delay timer finish out.
+                break;
+            case AFNetworkActivityManagerStateActive:
+                if (!self.isNetworkActivityOccurring) {
+                    [self setCurrentState:AFNetworkActivityManagerStateDelayingEnd];
+                }
+                break;
+            case AFNetworkActivityManagerStateDelayingEnd:
+                if (self.isNetworkActivityOccurring) {
+                    [self setCurrentState:AFNetworkActivityManagerStateActive];
+                }
+                break;
+        }
+    }
+}
+
+- (void)startActivationDelayTimer {
+    self.activationDelayTimer = [NSTimer
+                                 timerWithTimeInterval:self.activationDelay target:self selector:@selector(activationDelayTimerFired) userInfo:nil repeats:NO];
+    [[NSRunLoop mainRunLoop] addTimer:self.activationDelayTimer forMode:NSRunLoopCommonModes];
+}
+
+- (void)activationDelayTimerFired {
+    if (self.networkActivityOccurring) {
+        [self setCurrentState:AFNetworkActivityManagerStateActive];
+    } else {
+        [self setCurrentState:AFNetworkActivityManagerStateNotActive];
+    }
+}
+
+- (void)startCompletionDelayTimer {
+    [self.completionDelayTimer invalidate];
+    self.completionDelayTimer = [NSTimer timerWithTimeInterval:self.completionDelay target:self selector:@selector(completionDelayTimerFired) userInfo:nil repeats:NO];
+    [[NSRunLoop mainRunLoop] addTimer:self.completionDelayTimer forMode:NSRunLoopCommonModes];
+}
+
+- (void)completionDelayTimerFired {
+    [self setCurrentState:AFNetworkActivityManagerStateNotActive];
+}
+
+- (void)cancelActivationDelayTimer {
+    [self.activationDelayTimer invalidate];
+}
+
+- (void)cancelCompletionDelayTimer {
+    [self.completionDelayTimer invalidate];
+}
+
+@end
+
+#endif

Pods/AFNetworking/UIKit+AFNetworking/UIActivityIndicatorView+AFNetworking.h

@@ -0,0 +1,48 @@
+// UIActivityIndicatorView+AFNetworking.h
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <Foundation/Foundation.h>
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+
+#import <UIKit/UIKit.h>
+
+/**
+ This category adds methods to the UIKit framework's `UIActivityIndicatorView` class. The methods in this category provide support for automatically starting and stopping animation depending on the loading state of a session task.
+ */
+@interface UIActivityIndicatorView (AFNetworking)
+
+///----------------------------------
+/// @name Animating for Session Tasks
+///----------------------------------
+
+/**
+ Binds the animating state to the state of the specified task.
+
+ @param task The task. If `nil`, automatic updating from any previously specified operation will be disabled.
+ */
+- (void)setAnimatingWithStateOfTask:(nullable NSURLSessionTask *)task;
+
+@end
+
+#endif

Pods/AFNetworking/UIKit+AFNetworking/UIActivityIndicatorView+AFNetworking.m

@@ -0,0 +1,114 @@
+// UIActivityIndicatorView+AFNetworking.m
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import "UIActivityIndicatorView+AFNetworking.h"
+#import <objc/runtime.h>
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+
+#import "AFURLSessionManager.h"
+
+@interface AFActivityIndicatorViewNotificationObserver : NSObject
+@property (readonly, nonatomic, weak) UIActivityIndicatorView *activityIndicatorView;
+- (instancetype)initWithActivityIndicatorView:(UIActivityIndicatorView *)activityIndicatorView;
+
+- (void)setAnimatingWithStateOfTask:(NSURLSessionTask *)task;
+
+@end
+
+@implementation UIActivityIndicatorView (AFNetworking)
+
+- (AFActivityIndicatorViewNotificationObserver *)af_notificationObserver {
+    AFActivityIndicatorViewNotificationObserver *notificationObserver = objc_getAssociatedObject(self, @selector(af_notificationObserver));
+    if (notificationObserver == nil) {
+        notificationObserver = [[AFActivityIndicatorViewNotificationObserver alloc] initWithActivityIndicatorView:self];
+        objc_setAssociatedObject(self, @selector(af_notificationObserver), notificationObserver, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+    }
+    return notificationObserver;
+}
+
+- (void)setAnimatingWithStateOfTask:(NSURLSessionTask *)task {
+    [[self af_notificationObserver] setAnimatingWithStateOfTask:task];
+}
+
+@end
+
+@implementation AFActivityIndicatorViewNotificationObserver
+
+- (instancetype)initWithActivityIndicatorView:(UIActivityIndicatorView *)activityIndicatorView
+{
+    self = [super init];
+    if (self) {
+        _activityIndicatorView = activityIndicatorView;
+    }
+    return self;
+}
+
+- (void)setAnimatingWithStateOfTask:(NSURLSessionTask *)task {
+    NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
+
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidResumeNotification object:nil];
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidSuspendNotification object:nil];
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidCompleteNotification object:nil];
+    
+    if (task) {
+        if (task.state != NSURLSessionTaskStateCompleted) {
+            UIActivityIndicatorView *activityIndicatorView = self.activityIndicatorView;
+            if (task.state == NSURLSessionTaskStateRunning) {
+                [activityIndicatorView startAnimating];
+            } else {
+                [activityIndicatorView stopAnimating];
+            }
+
+            [notificationCenter addObserver:self selector:@selector(af_startAnimating) name:AFNetworkingTaskDidResumeNotification object:task];
+            [notificationCenter addObserver:self selector:@selector(af_stopAnimating) name:AFNetworkingTaskDidCompleteNotification object:task];
+            [notificationCenter addObserver:self selector:@selector(af_stopAnimating) name:AFNetworkingTaskDidSuspendNotification object:task];
+        }
+    }
+}
+
+#pragma mark -
+
+- (void)af_startAnimating {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.activityIndicatorView startAnimating];
+    });
+}
+
+- (void)af_stopAnimating {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.activityIndicatorView stopAnimating];
+    });
+}
+
+#pragma mark -
+
+- (void)dealloc {
+    NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
+    
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidCompleteNotification object:nil];
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidResumeNotification object:nil];
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidSuspendNotification object:nil];
+}
+
+@end
+
+#endif

Pods/AFNetworking/UIKit+AFNetworking/UIButton+AFNetworking.h

@@ -0,0 +1,175 @@
+// UIButton+AFNetworking.h
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <Foundation/Foundation.h>
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class AFImageDownloader;
+
+/**
+ This category adds methods to the UIKit framework's `UIButton` class. The methods in this category provide support for loading remote images and background images asynchronously from a URL.
+
+ @warning Compound values for control `state` (such as `UIControlStateHighlighted | UIControlStateDisabled`) are unsupported.
+ */
+@interface UIButton (AFNetworking)
+
+///------------------------------------
+/// @name Accessing the Image Downloader
+///------------------------------------
+
+/**
+ Set the shared image downloader used to download images.
+
+ @param imageDownloader The shared image downloader used to download images.
+*/
++ (void)setSharedImageDownloader:(AFImageDownloader *)imageDownloader;
+
+/**
+ The shared image downloader used to download images.
+ */
++ (AFImageDownloader *)sharedImageDownloader;
+
+///--------------------
+/// @name Setting Image
+///--------------------
+
+/**
+ Asynchronously downloads an image from the specified URL, and sets it as the image for the specified state once the request is finished. Any previous image request for the receiver will be cancelled.
+
+  If the image is cached locally, the image is set immediately, otherwise the specified placeholder image will be set immediately, and then the remote image will be set once the request is finished.
+
+ @param state The control state.
+ @param url The URL used for the image request.
+ */
+- (void)setImageForState:(UIControlState)state
+                 withURL:(NSURL *)url;
+
+/**
+ Asynchronously downloads an image from the specified URL, and sets it as the image for the specified state once the request is finished. Any previous image request for the receiver will be cancelled.
+
+ If the image is cached locally, the image is set immediately, otherwise the specified placeholder image will be set immediately, and then the remote image will be set once the request is finished.
+
+ @param state The control state.
+ @param url The URL used for the image request.
+ @param placeholderImage The image to be set initially, until the image request finishes. If `nil`, the button will not change its image until the image request finishes.
+ */
+- (void)setImageForState:(UIControlState)state
+                 withURL:(NSURL *)url
+        placeholderImage:(nullable UIImage *)placeholderImage;
+
+/**
+ Asynchronously downloads an image from the specified URL request, and sets it as the image for the specified state once the request is finished. Any previous image request for the receiver will be cancelled.
+
+ If the image is cached locally, the image is set immediately, otherwise the specified placeholder image will be set immediately, and then the remote image will be set once the request is finished.
+
+ If a success block is specified, it is the responsibility of the block to set the image of the button before returning. If no success block is specified, the default behavior of setting the image with `setImage:forState:` is applied.
+
+ @param state The control state.
+ @param urlRequest The URL request used for the image request.
+ @param placeholderImage The image to be set initially, until the image request finishes. If `nil`, the button will not change its image until the image request finishes.
+ @param success A block to be executed when the image data task finishes successfully. This block has no return value and takes three arguments: the request sent from the client, the response received from the server, and the image created from the response data of request. If the image was returned from cache, the response parameter will be `nil`.
+ @param failure A block object to be executed when the image data task finishes unsuccessfully, or that finishes successfully. This block has no return value and takes three arguments: the request sent from the client, the response received from the server, and the error object describing the network or parsing error that occurred.
+ */
+- (void)setImageForState:(UIControlState)state
+          withURLRequest:(NSURLRequest *)urlRequest
+        placeholderImage:(nullable UIImage *)placeholderImage
+                 success:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, UIImage *image))success
+                 failure:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, NSError *error))failure;
+
+
+///-------------------------------
+/// @name Setting Background Image
+///-------------------------------
+
+/**
+ Asynchronously downloads an image from the specified URL, and sets it as the background image for the specified state once the request is finished. Any previous background image request for the receiver will be cancelled.
+
+ If the background image is cached locally, the background image is set immediately, otherwise the specified placeholder background image will be set immediately, and then the remote background image will be set once the request is finished.
+
+ @param state The control state.
+ @param url The URL used for the background image request.
+ */
+- (void)setBackgroundImageForState:(UIControlState)state
+                           withURL:(NSURL *)url;
+
+/**
+ Asynchronously downloads an image from the specified URL, and sets it as the background image for the specified state once the request is finished. Any previous image request for the receiver will be cancelled.
+
+ If the image is cached locally, the image is set immediately, otherwise the specified placeholder image will be set immediately, and then the remote image will be set once the request is finished.
+
+ @param state The control state.
+ @param url The URL used for the background image request.
+ @param placeholderImage The background image to be set initially, until the background image request finishes. If `nil`, the button will not change its background image until the background image request finishes.
+ */
+- (void)setBackgroundImageForState:(UIControlState)state
+                           withURL:(NSURL *)url
+                  placeholderImage:(nullable UIImage *)placeholderImage;
+
+/**
+ Asynchronously downloads an image from the specified URL request, and sets it as the image for the specified state once the request is finished. Any previous image request for the receiver will be cancelled.
+
+ If the image is cached locally, the image is set immediately, otherwise the specified placeholder image will be set immediately, and then the remote image will be set once the request is finished.
+
+ If a success block is specified, it is the responsibility of the block to set the image of the button before returning. If no success block is specified, the default behavior of setting the image with `setBackgroundImage:forState:` is applied.
+
+ @param state The control state.
+ @param urlRequest The URL request used for the image request.
+ @param placeholderImage The background image to be set initially, until the background image request finishes. If `nil`, the button will not change its background image until the background image request finishes.
+ @param success A block to be executed when the image data task finishes successfully. This block has no return value and takes three arguments: the request sent from the client, the response received from the server, and the image created from the response data of request. If the image was returned from cache, the response parameter will be `nil`.
+ @param failure A block object to be executed when the image data task finishes unsuccessfully, or that finishes successfully. This block has no return value and takes three arguments: the request sent from the client, the response received from the server, and the error object describing the network or parsing error that occurred.
+ */
+- (void)setBackgroundImageForState:(UIControlState)state
+                    withURLRequest:(NSURLRequest *)urlRequest
+                  placeholderImage:(nullable UIImage *)placeholderImage
+                           success:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, UIImage *image))success
+                           failure:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, NSError *error))failure;
+
+
+///------------------------------
+/// @name Canceling Image Loading
+///------------------------------
+
+/**
+ Cancels any executing image task for the specified control state of the receiver, if one exists.
+
+ @param state The control state.
+ */
+- (void)cancelImageDownloadTaskForState:(UIControlState)state;
+
+/**
+ Cancels any executing background image task for the specified control state of the receiver, if one exists.
+
+ @param state The control state.
+ */
+- (void)cancelBackgroundImageDownloadTaskForState:(UIControlState)state;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif

Pods/AFNetworking/UIKit+AFNetworking/UIButton+AFNetworking.m

@@ -0,0 +1,302 @@
+// UIButton+AFNetworking.m
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import "UIButton+AFNetworking.h"
+
+#import <objc/runtime.h>
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+
+#import "UIImageView+AFNetworking.h"
+#import "AFImageDownloader.h"
+
+@interface UIButton (_AFNetworking)
+@end
+
+@implementation UIButton (_AFNetworking)
+
+#pragma mark -
+
+static char AFImageDownloadReceiptNormal;
+static char AFImageDownloadReceiptHighlighted;
+static char AFImageDownloadReceiptSelected;
+static char AFImageDownloadReceiptDisabled;
+
+static const char * af_imageDownloadReceiptKeyForState(UIControlState state) {
+    switch (state) {
+        case UIControlStateHighlighted:
+            return &AFImageDownloadReceiptHighlighted;
+        case UIControlStateSelected:
+            return &AFImageDownloadReceiptSelected;
+        case UIControlStateDisabled:
+            return &AFImageDownloadReceiptDisabled;
+        case UIControlStateNormal:
+        default:
+            return &AFImageDownloadReceiptNormal;
+    }
+}
+
+- (AFImageDownloadReceipt *)af_imageDownloadReceiptForState:(UIControlState)state {
+    return (AFImageDownloadReceipt *)objc_getAssociatedObject(self, af_imageDownloadReceiptKeyForState(state));
+}
+
+- (void)af_setImageDownloadReceipt:(AFImageDownloadReceipt *)imageDownloadReceipt
+                           forState:(UIControlState)state
+{
+    objc_setAssociatedObject(self, af_imageDownloadReceiptKeyForState(state), imageDownloadReceipt, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+}
+
+#pragma mark -
+
+static char AFBackgroundImageDownloadReceiptNormal;
+static char AFBackgroundImageDownloadReceiptHighlighted;
+static char AFBackgroundImageDownloadReceiptSelected;
+static char AFBackgroundImageDownloadReceiptDisabled;
+
+static const char * af_backgroundImageDownloadReceiptKeyForState(UIControlState state) {
+    switch (state) {
+        case UIControlStateHighlighted:
+            return &AFBackgroundImageDownloadReceiptHighlighted;
+        case UIControlStateSelected:
+            return &AFBackgroundImageDownloadReceiptSelected;
+        case UIControlStateDisabled:
+            return &AFBackgroundImageDownloadReceiptDisabled;
+        case UIControlStateNormal:
+        default:
+            return &AFBackgroundImageDownloadReceiptNormal;
+    }
+}
+
+- (AFImageDownloadReceipt *)af_backgroundImageDownloadReceiptForState:(UIControlState)state {
+    return (AFImageDownloadReceipt *)objc_getAssociatedObject(self, af_backgroundImageDownloadReceiptKeyForState(state));
+}
+
+- (void)af_setBackgroundImageDownloadReceipt:(AFImageDownloadReceipt *)imageDownloadReceipt
+                                     forState:(UIControlState)state
+{
+    objc_setAssociatedObject(self, af_backgroundImageDownloadReceiptKeyForState(state), imageDownloadReceipt, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+}
+
+@end
+
+#pragma mark -
+
+@implementation UIButton (AFNetworking)
+
++ (AFImageDownloader *)sharedImageDownloader {
+
+    return objc_getAssociatedObject([UIButton class], @selector(sharedImageDownloader)) ?: [AFImageDownloader defaultInstance];
+}
+
++ (void)setSharedImageDownloader:(AFImageDownloader *)imageDownloader {
+    objc_setAssociatedObject([UIButton class], @selector(sharedImageDownloader), imageDownloader, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+}
+
+#pragma mark -
+
+- (void)setImageForState:(UIControlState)state
+                 withURL:(NSURL *)url
+{
+    [self setImageForState:state withURL:url placeholderImage:nil];
+}
+
+- (void)setImageForState:(UIControlState)state
+                 withURL:(NSURL *)url
+        placeholderImage:(UIImage *)placeholderImage
+{
+    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
+    [request addValue:@"image/*" forHTTPHeaderField:@"Accept"];
+
+    [self setImageForState:state withURLRequest:request placeholderImage:placeholderImage success:nil failure:nil];
+}
+
+- (void)setImageForState:(UIControlState)state
+          withURLRequest:(NSURLRequest *)urlRequest
+        placeholderImage:(nullable UIImage *)placeholderImage
+                 success:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, UIImage *image))success
+                 failure:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, NSError *error))failure
+{
+    if ([self isActiveTaskURLEqualToURLRequest:urlRequest forState:state]) {
+        return;
+    }
+
+    [self cancelImageDownloadTaskForState:state];
+
+    AFImageDownloader *downloader = [[self class] sharedImageDownloader];
+    id <AFImageRequestCache> imageCache = downloader.imageCache;
+
+    //Use the image from the image cache if it exists
+    UIImage *cachedImage = [imageCache imageforRequest:urlRequest withAdditionalIdentifier:nil];
+    if (cachedImage) {
+        if (success) {
+            success(urlRequest, nil, cachedImage);
+        } else {
+            [self setImage:cachedImage forState:state];
+        }
+        [self af_setImageDownloadReceipt:nil forState:state];
+    } else {
+        if (placeholderImage) {
+            [self setImage:placeholderImage forState:state];
+        }
+
+        __weak __typeof(self)weakSelf = self;
+        NSUUID *downloadID = [NSUUID UUID];
+        AFImageDownloadReceipt *receipt;
+        receipt = [downloader
+                   downloadImageForURLRequest:urlRequest
+                   withReceiptID:downloadID
+                   success:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, UIImage * _Nonnull responseObject) {
+                       __strong __typeof(weakSelf)strongSelf = weakSelf;
+                       if ([[strongSelf af_imageDownloadReceiptForState:state].receiptID isEqual:downloadID]) {
+                           if (success) {
+                               success(request, response, responseObject);
+                           } else if (responseObject) {
+                               [strongSelf setImage:responseObject forState:state];
+                           }
+                           [strongSelf af_setImageDownloadReceipt:nil forState:state];
+                       }
+
+                   }
+                   failure:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, NSError * _Nonnull error) {
+                       __strong __typeof(weakSelf)strongSelf = weakSelf;
+                       if ([[strongSelf af_imageDownloadReceiptForState:state].receiptID isEqual:downloadID]) {
+                           if (failure) {
+                               failure(request, response, error);
+                           }
+                           [strongSelf  af_setImageDownloadReceipt:nil forState:state];
+                       }
+                   }];
+
+        [self af_setImageDownloadReceipt:receipt forState:state];
+    }
+}
+
+#pragma mark -
+
+- (void)setBackgroundImageForState:(UIControlState)state
+                           withURL:(NSURL *)url
+{
+    [self setBackgroundImageForState:state withURL:url placeholderImage:nil];
+}
+
+- (void)setBackgroundImageForState:(UIControlState)state
+                           withURL:(NSURL *)url
+                  placeholderImage:(nullable UIImage *)placeholderImage
+{
+    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
+    [request addValue:@"image/*" forHTTPHeaderField:@"Accept"];
+
+    [self setBackgroundImageForState:state withURLRequest:request placeholderImage:placeholderImage success:nil failure:nil];
+}
+
+- (void)setBackgroundImageForState:(UIControlState)state
+                    withURLRequest:(NSURLRequest *)urlRequest
+                  placeholderImage:(nullable UIImage *)placeholderImage
+                           success:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, UIImage *image))success
+                           failure:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, NSError *error))failure
+{
+    if ([self isActiveBackgroundTaskURLEqualToURLRequest:urlRequest forState:state]) {
+        return;
+    }
+
+    [self cancelBackgroundImageDownloadTaskForState:state];
+
+    AFImageDownloader *downloader = [[self class] sharedImageDownloader];
+    id <AFImageRequestCache> imageCache = downloader.imageCache;
+
+    //Use the image from the image cache if it exists
+    UIImage *cachedImage = [imageCache imageforRequest:urlRequest withAdditionalIdentifier:nil];
+    if (cachedImage) {
+        if (success) {
+            success(urlRequest, nil, cachedImage);
+        } else {
+            [self setBackgroundImage:cachedImage forState:state];
+        }
+        [self af_setBackgroundImageDownloadReceipt:nil forState:state];
+    } else {
+        if (placeholderImage) {
+            [self setBackgroundImage:placeholderImage forState:state];
+        }
+
+        __weak __typeof(self)weakSelf = self;
+        NSUUID *downloadID = [NSUUID UUID];
+        AFImageDownloadReceipt *receipt;
+        receipt = [downloader
+                   downloadImageForURLRequest:urlRequest
+                   withReceiptID:downloadID
+                   success:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, UIImage * _Nonnull responseObject) {
+                       __strong __typeof(weakSelf)strongSelf = weakSelf;
+                       if ([[strongSelf af_backgroundImageDownloadReceiptForState:state].receiptID isEqual:downloadID]) {
+                           if (success) {
+                               success(request, response, responseObject);
+                           } else if (responseObject) {
+                               [strongSelf setBackgroundImage:responseObject forState:state];
+                           }
+                           [strongSelf af_setBackgroundImageDownloadReceipt:nil forState:state];
+                       }
+
+                   }
+                   failure:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, NSError * _Nonnull error) {
+                       __strong __typeof(weakSelf)strongSelf = weakSelf;
+                       if ([[strongSelf af_backgroundImageDownloadReceiptForState:state].receiptID isEqual:downloadID]) {
+                           if (failure) {
+                               failure(request, response, error);
+                           }
+                           [strongSelf  af_setBackgroundImageDownloadReceipt:nil forState:state];
+                       }
+                   }];
+
+        [self af_setBackgroundImageDownloadReceipt:receipt forState:state];
+    }
+}
+
+#pragma mark -
+
+- (void)cancelImageDownloadTaskForState:(UIControlState)state {
+    AFImageDownloadReceipt *receipt = [self af_imageDownloadReceiptForState:state];
+    if (receipt != nil) {
+        [[self.class sharedImageDownloader] cancelTaskForImageDownloadReceipt:receipt];
+        [self af_setImageDownloadReceipt:nil forState:state];
+    }
+}
+
+- (void)cancelBackgroundImageDownloadTaskForState:(UIControlState)state {
+    AFImageDownloadReceipt *receipt = [self af_backgroundImageDownloadReceiptForState:state];
+    if (receipt != nil) {
+        [[self.class sharedImageDownloader] cancelTaskForImageDownloadReceipt:receipt];
+        [self af_setBackgroundImageDownloadReceipt:nil forState:state];
+    }
+}
+
+- (BOOL)isActiveTaskURLEqualToURLRequest:(NSURLRequest *)urlRequest forState:(UIControlState)state {
+    AFImageDownloadReceipt *receipt = [self af_imageDownloadReceiptForState:state];
+    return [receipt.task.originalRequest.URL.absoluteString isEqualToString:urlRequest.URL.absoluteString];
+}
+
+- (BOOL)isActiveBackgroundTaskURLEqualToURLRequest:(NSURLRequest *)urlRequest forState:(UIControlState)state {
+    AFImageDownloadReceipt *receipt = [self af_backgroundImageDownloadReceiptForState:state];
+    return [receipt.task.originalRequest.URL.absoluteString isEqualToString:urlRequest.URL.absoluteString];
+}
+
+
+@end
+
+#endif

Pods/AFNetworking/UIKit+AFNetworking/UIImageView+AFNetworking.h

@@ -0,0 +1,109 @@
+// UIImageView+AFNetworking.h
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <Foundation/Foundation.h>
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class AFImageDownloader;
+
+/**
+ This category adds methods to the UIKit framework's `UIImageView` class. The methods in this category provide support for loading remote images asynchronously from a URL.
+ */
+@interface UIImageView (AFNetworking)
+
+///------------------------------------
+/// @name Accessing the Image Downloader
+///------------------------------------
+
+/**
+ Set the shared image downloader used to download images.
+
+ @param imageDownloader The shared image downloader used to download images.
+ */
++ (void)setSharedImageDownloader:(AFImageDownloader *)imageDownloader;
+
+/**
+ The shared image downloader used to download images.
+ */
++ (AFImageDownloader *)sharedImageDownloader;
+
+///--------------------
+/// @name Setting Image
+///--------------------
+
+/**
+ Asynchronously downloads an image from the specified URL, and sets it once the request is finished. Any previous image request for the receiver will be cancelled.
+
+ If the image is cached locally, the image is set immediately, otherwise the specified placeholder image will be set immediately, and then the remote image will be set once the request is finished.
+
+ By default, URL requests have a `Accept` header field value of "image / *", a cache policy of `NSURLCacheStorageAllowed` and a timeout interval of 30 seconds, and are set not handle cookies. To configure URL requests differently, use `setImageWithURLRequest:placeholderImage:success:failure:`
+
+ @param url The URL used for the image request.
+ */
+- (void)setImageWithURL:(NSURL *)url;
+
+/**
+ Asynchronously downloads an image from the specified URL, and sets it once the request is finished. Any previous image request for the receiver will be cancelled.
+
+ If the image is cached locally, the image is set immediately, otherwise the specified placeholder image will be set immediately, and then the remote image will be set once the request is finished.
+
+ By default, URL requests have a `Accept` header field value of "image / *", a cache policy of `NSURLCacheStorageAllowed` and a timeout interval of 30 seconds, and are set not handle cookies. To configure URL requests differently, use `setImageWithURLRequest:placeholderImage:success:failure:`
+
+ @param url The URL used for the image request.
+ @param placeholderImage The image to be set initially, until the image request finishes. If `nil`, the image view will not change its image until the image request finishes.
+ */
+- (void)setImageWithURL:(NSURL *)url
+       placeholderImage:(nullable UIImage *)placeholderImage;
+
+/**
+ Asynchronously downloads an image from the specified URL request, and sets it once the request is finished. Any previous image request for the receiver will be cancelled.
+
+ If the image is cached locally, the image is set immediately, otherwise the specified placeholder image will be set immediately, and then the remote image will be set once the request is finished.
+
+ If a success block is specified, it is the responsibility of the block to set the image of the image view before returning. If no success block is specified, the default behavior of setting the image with `self.image = image` is applied.
+
+ @param urlRequest The URL request used for the image request.
+ @param placeholderImage The image to be set initially, until the image request finishes. If `nil`, the image view will not change its image until the image request finishes.
+ @param success A block to be executed when the image data task finishes successfully. This block has no return value and takes three arguments: the request sent from the client, the response received from the server, and the image created from the response data of request. If the image was returned from cache, the response parameter will be `nil`.
+ @param failure A block object to be executed when the image data task finishes unsuccessfully, or that finishes successfully. This block has no return value and takes three arguments: the request sent from the client, the response received from the server, and the error object describing the network or parsing error that occurred.
+ */
+- (void)setImageWithURLRequest:(NSURLRequest *)urlRequest
+              placeholderImage:(nullable UIImage *)placeholderImage
+                       success:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, UIImage *image))success
+                       failure:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, NSError *error))failure;
+
+/**
+ Cancels any executing image operation for the receiver, if one exists.
+ */
+- (void)cancelImageDownloadTask;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif

Pods/AFNetworking/UIKit+AFNetworking/UIImageView+AFNetworking.m

@@ -0,0 +1,159 @@
+// UIImageView+AFNetworking.m
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import "UIImageView+AFNetworking.h"
+
+#import <objc/runtime.h>
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+
+#import "AFImageDownloader.h"
+
+@interface UIImageView (_AFNetworking)
+@property (readwrite, nonatomic, strong, setter = af_setActiveImageDownloadReceipt:) AFImageDownloadReceipt *af_activeImageDownloadReceipt;
+@end
+
+@implementation UIImageView (_AFNetworking)
+
+- (AFImageDownloadReceipt *)af_activeImageDownloadReceipt {
+    return (AFImageDownloadReceipt *)objc_getAssociatedObject(self, @selector(af_activeImageDownloadReceipt));
+}
+
+- (void)af_setActiveImageDownloadReceipt:(AFImageDownloadReceipt *)imageDownloadReceipt {
+    objc_setAssociatedObject(self, @selector(af_activeImageDownloadReceipt), imageDownloadReceipt, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+}
+
+@end
+
+#pragma mark -
+
+@implementation UIImageView (AFNetworking)
+
++ (AFImageDownloader *)sharedImageDownloader {
+    return objc_getAssociatedObject([UIImageView class], @selector(sharedImageDownloader)) ?: [AFImageDownloader defaultInstance];
+}
+
++ (void)setSharedImageDownloader:(AFImageDownloader *)imageDownloader {
+    objc_setAssociatedObject([UIImageView class], @selector(sharedImageDownloader), imageDownloader, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+}
+
+#pragma mark -
+
+- (void)setImageWithURL:(NSURL *)url {
+    [self setImageWithURL:url placeholderImage:nil];
+}
+
+- (void)setImageWithURL:(NSURL *)url
+       placeholderImage:(UIImage *)placeholderImage
+{
+    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
+    [request addValue:@"image/*" forHTTPHeaderField:@"Accept"];
+
+    [self setImageWithURLRequest:request placeholderImage:placeholderImage success:nil failure:nil];
+}
+
+- (void)setImageWithURLRequest:(NSURLRequest *)urlRequest
+              placeholderImage:(UIImage *)placeholderImage
+                       success:(void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, UIImage *image))success
+                       failure:(void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, NSError *error))failure
+{
+    if ([urlRequest URL] == nil) {
+        self.image = placeholderImage;
+        if (failure) {
+            NSError *error = [NSError errorWithDomain:NSURLErrorDomain code:NSURLErrorBadURL userInfo:nil];
+            failure(urlRequest, nil, error);
+        }
+        return;
+    }
+    
+    if ([self isActiveTaskURLEqualToURLRequest:urlRequest]) {
+        return;
+    }
+    
+    [self cancelImageDownloadTask];
+
+    AFImageDownloader *downloader = [[self class] sharedImageDownloader];
+    id <AFImageRequestCache> imageCache = downloader.imageCache;
+
+    //Use the image from the image cache if it exists
+    UIImage *cachedImage = [imageCache imageforRequest:urlRequest withAdditionalIdentifier:nil];
+    if (cachedImage) {
+        if (success) {
+            success(urlRequest, nil, cachedImage);
+        } else {
+            self.image = cachedImage;
+        }
+        [self clearActiveDownloadInformation];
+    } else {
+        if (placeholderImage) {
+            self.image = placeholderImage;
+        }
+
+        __weak __typeof(self)weakSelf = self;
+        NSUUID *downloadID = [NSUUID UUID];
+        AFImageDownloadReceipt *receipt;
+        receipt = [downloader
+                   downloadImageForURLRequest:urlRequest
+                   withReceiptID:downloadID
+                   success:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, UIImage * _Nonnull responseObject) {
+                       __strong __typeof(weakSelf)strongSelf = weakSelf;
+                       if ([strongSelf.af_activeImageDownloadReceipt.receiptID isEqual:downloadID]) {
+                           if (success) {
+                               success(request, response, responseObject);
+                           } else if (responseObject) {
+                               strongSelf.image = responseObject;
+                           }
+                           [strongSelf clearActiveDownloadInformation];
+                       }
+
+                   }
+                   failure:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, NSError * _Nonnull error) {
+                       __strong __typeof(weakSelf)strongSelf = weakSelf;
+                        if ([strongSelf.af_activeImageDownloadReceipt.receiptID isEqual:downloadID]) {
+                            if (failure) {
+                                failure(request, response, error);
+                            }
+                            [strongSelf clearActiveDownloadInformation];
+                        }
+                   }];
+
+        self.af_activeImageDownloadReceipt = receipt;
+    }
+}
+
+- (void)cancelImageDownloadTask {
+    if (self.af_activeImageDownloadReceipt != nil) {
+        [[self.class sharedImageDownloader] cancelTaskForImageDownloadReceipt:self.af_activeImageDownloadReceipt];
+        [self clearActiveDownloadInformation];
+     }
+}
+
+- (void)clearActiveDownloadInformation {
+    self.af_activeImageDownloadReceipt = nil;
+}
+
+- (BOOL)isActiveTaskURLEqualToURLRequest:(NSURLRequest *)urlRequest {
+    return [self.af_activeImageDownloadReceipt.task.originalRequest.URL.absoluteString isEqualToString:urlRequest.URL.absoluteString];
+}
+
+@end
+
+#endif

Pods/AFNetworking/UIKit+AFNetworking/UIKit+AFNetworking.h

@@ -0,0 +1,43 @@
+// UIKit+AFNetworking.h
+//
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <TargetConditionals.h>
+
+#ifndef _UIKIT_AFNETWORKING_
+    #define _UIKIT_AFNETWORKING_
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+    #import "AFAutoPurgingImageCache.h"
+    #import "AFImageDownloader.h"
+    #import "UIActivityIndicatorView+AFNetworking.h"
+    #import "UIButton+AFNetworking.h"
+    #import "UIImageView+AFNetworking.h"
+    #import "UIProgressView+AFNetworking.h"
+#endif
+
+#if TARGET_OS_IOS
+    #import "AFNetworkActivityIndicatorManager.h"
+    #import "UIRefreshControl+AFNetworking.h"
+    #import "WKWebView+AFNetworking.h"
+#endif
+
+#endif /* _UIKIT_AFNETWORKING_ */

Pods/AFNetworking/UIKit+AFNetworking/UIProgressView+AFNetworking.h

@@ -0,0 +1,64 @@
+// UIProgressView+AFNetworking.h
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <Foundation/Foundation.h>
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+
+/**
+ This category adds methods to the UIKit framework's `UIProgressView` class. The methods in this category provide support for binding the progress to the upload and download progress of a session task.
+ */
+@interface UIProgressView (AFNetworking)
+
+///------------------------------------
+/// @name Setting Session Task Progress
+///------------------------------------
+
+/**
+ Binds the progress to the upload progress of the specified session task.
+
+ @param task The session task.
+ @param animated `YES` if the change should be animated, `NO` if the change should happen immediately.
+ */
+- (void)setProgressWithUploadProgressOfTask:(NSURLSessionUploadTask *)task
+                                   animated:(BOOL)animated;
+
+/**
+ Binds the progress to the download progress of the specified session task.
+
+ @param task The session task.
+ @param animated `YES` if the change should be animated, `NO` if the change should happen immediately.
+ */
+- (void)setProgressWithDownloadProgressOfTask:(NSURLSessionDownloadTask *)task
+                                     animated:(BOOL)animated;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif

Pods/AFNetworking/UIKit+AFNetworking/UIProgressView+AFNetworking.m

@@ -0,0 +1,126 @@
+// UIProgressView+AFNetworking.m
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import "UIProgressView+AFNetworking.h"
+
+#import <objc/runtime.h>
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+
+#import "AFURLSessionManager.h"
+
+static void * AFTaskCountOfBytesSentContext = &AFTaskCountOfBytesSentContext;
+static void * AFTaskCountOfBytesReceivedContext = &AFTaskCountOfBytesReceivedContext;
+
+#pragma mark -
+
+@implementation UIProgressView (AFNetworking)
+
+- (BOOL)af_uploadProgressAnimated {
+    return [(NSNumber *)objc_getAssociatedObject(self, @selector(af_uploadProgressAnimated)) boolValue];
+}
+
+- (void)af_setUploadProgressAnimated:(BOOL)animated {
+    objc_setAssociatedObject(self, @selector(af_uploadProgressAnimated), @(animated), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+}
+
+- (BOOL)af_downloadProgressAnimated {
+    return [(NSNumber *)objc_getAssociatedObject(self, @selector(af_downloadProgressAnimated)) boolValue];
+}
+
+- (void)af_setDownloadProgressAnimated:(BOOL)animated {
+    objc_setAssociatedObject(self, @selector(af_downloadProgressAnimated), @(animated), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+}
+
+#pragma mark -
+
+- (void)setProgressWithUploadProgressOfTask:(NSURLSessionUploadTask *)task
+                                   animated:(BOOL)animated
+{
+    if (task.state == NSURLSessionTaskStateCompleted) {
+        return;
+    }
+    
+    [task addObserver:self forKeyPath:@"state" options:(NSKeyValueObservingOptions)0 context:AFTaskCountOfBytesSentContext];
+    [task addObserver:self forKeyPath:@"countOfBytesSent" options:(NSKeyValueObservingOptions)0 context:AFTaskCountOfBytesSentContext];
+
+    [self af_setUploadProgressAnimated:animated];
+}
+
+- (void)setProgressWithDownloadProgressOfTask:(NSURLSessionDownloadTask *)task
+                                     animated:(BOOL)animated
+{
+    if (task.state == NSURLSessionTaskStateCompleted) {
+        return;
+    }
+    
+    [task addObserver:self forKeyPath:@"state" options:(NSKeyValueObservingOptions)0 context:AFTaskCountOfBytesReceivedContext];
+    [task addObserver:self forKeyPath:@"countOfBytesReceived" options:(NSKeyValueObservingOptions)0 context:AFTaskCountOfBytesReceivedContext];
+
+    [self af_setDownloadProgressAnimated:animated];
+}
+
+#pragma mark - NSKeyValueObserving
+
+- (void)observeValueForKeyPath:(NSString *)keyPath
+                      ofObject:(id)object
+                        change:(__unused NSDictionary *)change
+                       context:(void *)context
+{
+    if (context == AFTaskCountOfBytesSentContext || context == AFTaskCountOfBytesReceivedContext) {
+        if ([keyPath isEqualToString:NSStringFromSelector(@selector(countOfBytesSent))]) {
+            if ([object countOfBytesExpectedToSend] > 0) {
+                dispatch_async(dispatch_get_main_queue(), ^{
+                    [self setProgress:[object countOfBytesSent] / ([object countOfBytesExpectedToSend] * 1.0f) animated:self.af_uploadProgressAnimated];
+                });
+            }
+        }
+
+        if ([keyPath isEqualToString:NSStringFromSelector(@selector(countOfBytesReceived))]) {
+            if ([object countOfBytesExpectedToReceive] > 0) {
+                dispatch_async(dispatch_get_main_queue(), ^{
+                    [self setProgress:[object countOfBytesReceived] / ([object countOfBytesExpectedToReceive] * 1.0f) animated:self.af_downloadProgressAnimated];
+                });
+            }
+        }
+
+        if ([keyPath isEqualToString:NSStringFromSelector(@selector(state))]) {
+            if ([(NSURLSessionTask *)object state] == NSURLSessionTaskStateCompleted) {
+                @try {
+                    [object removeObserver:self forKeyPath:NSStringFromSelector(@selector(state))];
+
+                    if (context == AFTaskCountOfBytesSentContext) {
+                        [object removeObserver:self forKeyPath:NSStringFromSelector(@selector(countOfBytesSent))];
+                    }
+
+                    if (context == AFTaskCountOfBytesReceivedContext) {
+                        [object removeObserver:self forKeyPath:NSStringFromSelector(@selector(countOfBytesReceived))];
+                    }
+                }
+                @catch (NSException * __unused exception) {}
+            }
+        }
+    }
+}
+
+@end
+
+#endif

Pods/AFNetworking/UIKit+AFNetworking/UIRefreshControl+AFNetworking.h

@@ -0,0 +1,53 @@
+// UIRefreshControl+AFNetworking.m
+//
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <Foundation/Foundation.h>
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ This category adds methods to the UIKit framework's `UIRefreshControl` class. The methods in this category provide support for automatically beginning and ending refreshing depending on the loading state of a session task.
+ */
+@interface UIRefreshControl (AFNetworking)
+
+///-----------------------------------
+/// @name Refreshing for Session Tasks
+///-----------------------------------
+
+/**
+ Binds the refreshing state to the state of the specified task.
+ 
+ @param task The task. If `nil`, automatic updating from any previously specified operation will be disabled.
+ */
+- (void)setRefreshingWithStateOfTask:(NSURLSessionTask *)task;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif

Pods/AFNetworking/UIKit+AFNetworking/UIRefreshControl+AFNetworking.m

@@ -0,0 +1,113 @@
+// UIRefreshControl+AFNetworking.m
+//
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import "UIRefreshControl+AFNetworking.h"
+#import <objc/runtime.h>
+
+#if TARGET_OS_IOS
+
+#import "AFURLSessionManager.h"
+
+@interface AFRefreshControlNotificationObserver : NSObject
+@property (readonly, nonatomic, weak) UIRefreshControl *refreshControl;
+- (instancetype)initWithActivityRefreshControl:(UIRefreshControl *)refreshControl;
+
+- (void)setRefreshingWithStateOfTask:(NSURLSessionTask *)task;
+
+@end
+
+@implementation UIRefreshControl (AFNetworking)
+
+- (AFRefreshControlNotificationObserver *)af_notificationObserver {
+    AFRefreshControlNotificationObserver *notificationObserver = objc_getAssociatedObject(self, @selector(af_notificationObserver));
+    if (notificationObserver == nil) {
+        notificationObserver = [[AFRefreshControlNotificationObserver alloc] initWithActivityRefreshControl:self];
+        objc_setAssociatedObject(self, @selector(af_notificationObserver), notificationObserver, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+    }
+    return notificationObserver;
+}
+
+- (void)setRefreshingWithStateOfTask:(NSURLSessionTask *)task {
+    [[self af_notificationObserver] setRefreshingWithStateOfTask:task];
+}
+
+@end
+
+@implementation AFRefreshControlNotificationObserver
+
+- (instancetype)initWithActivityRefreshControl:(UIRefreshControl *)refreshControl
+{
+    self = [super init];
+    if (self) {
+        _refreshControl = refreshControl;
+    }
+    return self;
+}
+
+- (void)setRefreshingWithStateOfTask:(NSURLSessionTask *)task {
+    NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
+
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidResumeNotification object:nil];
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidSuspendNotification object:nil];
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidCompleteNotification object:nil];
+
+    if (task) {
+        UIRefreshControl *refreshControl = self.refreshControl;
+        if (task.state == NSURLSessionTaskStateRunning) {
+            [refreshControl beginRefreshing];
+
+            [notificationCenter addObserver:self selector:@selector(af_beginRefreshing) name:AFNetworkingTaskDidResumeNotification object:task];
+            [notificationCenter addObserver:self selector:@selector(af_endRefreshing) name:AFNetworkingTaskDidCompleteNotification object:task];
+            [notificationCenter addObserver:self selector:@selector(af_endRefreshing) name:AFNetworkingTaskDidSuspendNotification object:task];
+        } else {
+            [refreshControl endRefreshing];
+        }
+    }
+}
+
+#pragma mark -
+
+- (void)af_beginRefreshing {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.refreshControl beginRefreshing];
+    });
+}
+
+- (void)af_endRefreshing {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.refreshControl endRefreshing];
+    });
+}
+
+#pragma mark -
+
+- (void)dealloc {
+    NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
+    
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidCompleteNotification object:nil];
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidResumeNotification object:nil];
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidSuspendNotification object:nil];
+}
+
+@end
+
+#endif

Pods/AFNetworking/UIKit+AFNetworking/WKWebView+AFNetworking.h

@@ -0,0 +1,80 @@
+// WkWebView+AFNetworking.h
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <Foundation/Foundation.h>
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS
+
+#import <UIKit/UIKit.h>
+#import <WebKit/WebKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class AFHTTPSessionManager;
+
+@interface WKWebView (AFNetworking)
+
+/**
+ The session manager used to download all request
+ */
+@property (nonatomic, strong) AFHTTPSessionManager *sessionManager;
+
+/**
+ Asynchronously loads the specified request.
+ 
+ @param request A URL request identifying the location of the content to load. This must not be `nil`.
+ @param navigation The WKNavigation object that containts information for tracking the loading progress of a webpage. This must not be `nil`.
+ @param progress A progress object monitoring the current download progress.
+ @param success A block object to be executed when the request finishes loading successfully. This block returns the HTML string to be loaded by the web view, and takes two arguments: the response, and the response string.
+ @param failure A block object to be executed when the data task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a single argument: the error that occurred.
+ */
+- (void)loadRequest:(NSURLRequest *)request
+         navigation:(WKNavigation * _Nonnull)navigation
+           progress:(NSProgress * _Nullable __autoreleasing * _Nullable)progress
+            success:(nullable NSString * (^)(NSHTTPURLResponse *response, NSString *HTML))success
+            failure:(nullable void (^)(NSError *error))failure;
+
+/**
+ Asynchronously loads the data associated with a particular request with a specified MIME type and text encoding.
+ 
+ @param request A URL request identifying the location of the content to load. This must not be `nil`.
+ @param navigation The WKNavigation object that containts information for tracking the loading progress of a webpage.  This must not be `nil`.
+ @param MIMEType The MIME type of the content. Defaults to the content type of the response if not specified.
+ @param textEncodingName The IANA encoding name, as in `utf-8` or `utf-16`. Defaults to the response text encoding if not specified.
+ @param progress A progress object monitoring the current download progress.
+ @param success A block object to be executed when the request finishes loading successfully. This block returns the data to be loaded by the web view and takes two arguments: the response, and the downloaded data.
+ @param failure A block object to be executed when the data task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a single argument: the error that occurred.
+ */
+- (void)loadRequest:(NSURLRequest *)request
+         navigation:(WKNavigation * _Nonnull)navigation
+           MIMEType:(nullable NSString *)MIMEType
+   textEncodingName:(nullable NSString *)textEncodingName
+           progress:(NSProgress * _Nullable __autoreleasing * _Nullable)progress
+            success:(nullable NSData * (^)(NSHTTPURLResponse *response, NSData *data))success
+            failure:(nullable void (^)(NSError *error))failure;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif

Pods/AFNetworking/UIKit+AFNetworking/WKWebView+AFNetworking.m

@@ -0,0 +1,154 @@
+// WkWebView+AFNetworking.m
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import "WKWebView+AFNetworking.h"
+
+#import <objc/runtime.h>
+
+#if TARGET_OS_IOS
+
+#import "AFHTTPSessionManager.h"
+#import "AFURLResponseSerialization.h"
+#import "AFURLRequestSerialization.h"
+
+@interface WKWebView (_AFNetworking)
+@property (readwrite, nonatomic, strong, setter = af_setURLSessionTask:) NSURLSessionDataTask *af_URLSessionTask;
+@end
+
+@implementation WKWebView (_AFNetworking)
+
+- (NSURLSessionDataTask *)af_URLSessionTask {
+    return (NSURLSessionDataTask *)objc_getAssociatedObject(self, @selector(af_URLSessionTask));
+}
+
+- (void)af_setURLSessionTask:(NSURLSessionDataTask *)af_URLSessionTask {
+    objc_setAssociatedObject(self, @selector(af_URLSessionTask), af_URLSessionTask, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+}
+
+@end
+
+#pragma mark -
+
+@implementation WKWebView (AFNetworking)
+
+- (AFHTTPSessionManager *)sessionManager {
+    static AFHTTPSessionManager *_af_defaultHTTPSessionManager = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        _af_defaultHTTPSessionManager = [[AFHTTPSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
+        _af_defaultHTTPSessionManager.requestSerializer = [AFHTTPRequestSerializer serializer];
+        _af_defaultHTTPSessionManager.responseSerializer = [AFHTTPResponseSerializer serializer];
+    });
+    
+    return objc_getAssociatedObject(self, @selector(sessionManager)) ?: _af_defaultHTTPSessionManager;
+}
+
+- (void)setSessionManager:(AFHTTPSessionManager *)sessionManager {
+    objc_setAssociatedObject(self, @selector(sessionManager), sessionManager, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+}
+
+- (AFHTTPResponseSerializer <AFURLResponseSerialization> *)responseSerializer {
+    static AFHTTPResponseSerializer <AFURLResponseSerialization> *_af_defaultResponseSerializer = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        _af_defaultResponseSerializer = [AFHTTPResponseSerializer serializer];
+    });
+    
+    return objc_getAssociatedObject(self, @selector(responseSerializer)) ?: _af_defaultResponseSerializer;
+}
+
+- (void)setResponseSerializer:(AFHTTPResponseSerializer<AFURLResponseSerialization> *)responseSerializer {
+    objc_setAssociatedObject(self, @selector(responseSerializer), responseSerializer, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+}
+
+#pragma mark -
+
+- (void)loadRequest:(NSURLRequest *)request
+         navigation:(WKNavigation * _Nonnull)navigation
+           progress:(NSProgress * _Nullable __autoreleasing * _Nullable)progress
+            success:(nullable NSString * (^)(NSHTTPURLResponse *response, NSString *HTML))success
+            failure:(nullable void (^)(NSError *error))failure {
+    [self loadRequest:request navigation:navigation MIMEType:nil textEncodingName:nil progress:progress success:^NSData * _Nonnull(NSHTTPURLResponse * _Nonnull response, NSData * _Nonnull data) {
+        NSStringEncoding stringEncoding = NSUTF8StringEncoding;
+        if (response.textEncodingName) {
+            CFStringEncoding encoding = CFStringConvertIANACharSetNameToEncoding((CFStringRef)response.textEncodingName);
+            if (encoding != kCFStringEncodingInvalidId) {
+                stringEncoding = CFStringConvertEncodingToNSStringEncoding(encoding);
+            }
+        }
+        
+        NSString *string = [[NSString alloc] initWithData:data encoding:stringEncoding];
+        if (success) {
+            string = success(response, string);
+        }
+        
+        return [string dataUsingEncoding:stringEncoding];
+    } failure:failure];
+}
+
+- (void)loadRequest:(NSURLRequest *)request
+         navigation:(WKNavigation * _Nonnull)navigation
+           MIMEType:(nullable NSString *)MIMEType
+   textEncodingName:(nullable NSString *)textEncodingName
+           progress:(NSProgress * _Nullable __autoreleasing * _Nullable)progress
+            success:(nullable NSData * (^)(NSHTTPURLResponse *response, NSData *data))success
+            failure:(nullable void (^)(NSError *error))failure {
+    NSParameterAssert(request);
+    
+    if (self.af_URLSessionTask.state == NSURLSessionTaskStateRunning || self.af_URLSessionTask.state == NSURLSessionTaskStateSuspended) {
+        [self.af_URLSessionTask cancel];
+    }
+    self.af_URLSessionTask = nil;
+    
+    __weak __typeof(self)weakSelf = self;
+    __block NSURLSessionDataTask *dataTask;
+    __strong __typeof(weakSelf) strongSelf = weakSelf;
+    __strong __typeof(weakSelf.navigationDelegate) strongSelfDelegate = strongSelf.navigationDelegate;
+    dataTask = [self.sessionManager dataTaskWithRequest:request uploadProgress:nil downloadProgress:nil completionHandler:^(NSURLResponse * _Nonnull response, id  _Nullable responseObject, NSError * _Nullable error) {
+        if (error) {
+            if (failure) {
+                failure(error);
+            }
+        } else {
+            if (success) {
+                success((NSHTTPURLResponse *)response, responseObject);
+            }
+            [strongSelf loadData:responseObject MIMEType:MIMEType characterEncodingName:textEncodingName baseURL:[dataTask.currentRequest URL]];
+            
+            if ([strongSelfDelegate respondsToSelector:@selector(webView:didFinishNavigation:)]) {
+                [strongSelfDelegate webView:strongSelf didFinishNavigation:navigation];
+            }
+        }
+    }];
+    self.af_URLSessionTask = dataTask;
+    if (progress != nil) {
+        *progress = [self.sessionManager downloadProgressForTask:dataTask];
+    }
+    [self.af_URLSessionTask resume];
+    
+    if ([strongSelfDelegate respondsToSelector:@selector(webView:didStartProvisionalNavigation:)]) {
+        [strongSelfDelegate webView:self didStartProvisionalNavigation:navigation];
+    }
+}
+
+@end
+
+#endif

Pods/AppAuth/LICENSE

@@ -0,0 +1,202 @@
+
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+
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Pods/AppAuth/README.md

@@ -0,0 +1,717 @@
+![AppAuth for iOS and macOS](https://rawgit.com/openid/AppAuth-iOS/master/appauth_lockup.svg)
+[![tests](https://github.com/openid/AppAuth-iOS/actions/workflows/tests.yml/badge.svg?event=push)](https://github.com/openid/AppAuth-iOS/actions/workflows/tests.yml)
+[![codecov](https://codecov.io/gh/openid/AppAuth-iOS/branch/master/graph/badge.svg)](https://codecov.io/gh/openid/AppAuth-iOS)
+[![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-brightgreen.svg?style=flat)](https://github.com/Carthage/Carthage)
+[![SwiftPM compatible](https://img.shields.io/badge/SwiftPM-compatible-brightgreen.svg?style=flat)](https://swift.org/package-manager)
+[![Pod Version](https://img.shields.io/cocoapods/v/AppAuth.svg?style=flat)](https://cocoapods.org/pods/AppAuth)
+[![Pod License](https://img.shields.io/cocoapods/l/AppAuth.svg?style=flat)](https://github.com/openid/AppAuth-iOS/blob/master/LICENSE)
+[![Pod Platform](https://img.shields.io/cocoapods/p/AppAuth.svg?style=flat)](https://cocoapods.org/pods/AppAuth)
+[![Catalyst compatible](https://img.shields.io/badge/Catalyst-compatible-brightgreen.svg?style=flat)](https://developer.apple.com/documentation/xcode/creating_a_mac_version_of_your_ipad_app)
+
+AppAuth for iOS and macOS, and tvOS is a client SDK for communicating with 
+[OAuth 2.0](https://tools.ietf.org/html/rfc6749) and 
+[OpenID Connect](http://openid.net/specs/openid-connect-core-1_0.html) providers. 
+It strives to
+directly map the requests and responses of those specifications, while following
+the idiomatic style of the implementation language. In addition to mapping the
+raw protocol flows, convenience methods are available to assist with common
+tasks like performing an action with fresh tokens.
+
+It follows the best practices set out in 
+[RFC 8252 - OAuth 2.0 for Native Apps](https://tools.ietf.org/html/rfc8252)
+including using `SFAuthenticationSession` and `SFSafariViewController` on iOS
+for the auth request. `UIWebView` and `WKWebView` are explicitly *not*
+supported due to the security and usability reasons explained in
+[Section 8.12 of RFC 8252](https://tools.ietf.org/html/rfc8252#section-8.12).
+
+It also supports the [PKCE](https://tools.ietf.org/html/rfc7636) extension to
+OAuth, which was created to secure authorization codes in public clients when
+custom URI scheme redirects are used. The library is friendly to other
+extensions (standard or otherwise), with the ability to handle additional params
+in all protocol requests and responses.
+
+For tvOS, AppAuth implements [OAuth 2.0 Device Authorization Grant
+](https://tools.ietf.org/html/rfc8628) to allow for tvOS sign-ins through a secondary device.
+
+## Specification
+
+### iOS
+
+#### Supported Versions
+
+AppAuth supports iOS 7 and above.
+
+iOS 9+ uses the in-app browser tab pattern
+(via `SFSafariViewController`), and falls back to the system browser (mobile
+Safari) on earlier versions.
+
+#### Authorization Server Requirements
+
+Both Custom URI Schemes (all supported versions of iOS) and Universal Links
+(iOS 9+) can be used with the library.
+
+In general, AppAuth can work with any authorization server that supports
+native apps, as documented in [RFC 8252](https://tools.ietf.org/html/rfc8252),
+either through custom URI scheme redirects, or universal links.
+Authorization servers that assume all clients are web-based, or require clients to maintain
+confidentiality of the client secrets may not work well.
+
+### macOS
+
+#### Supported Versions
+
+AppAuth supports macOS (OS X) 10.9 and above.
+
+#### Authorization Server Requirements
+
+AppAuth for macOS supports both custom schemes; a loopback HTTP redirects
+via a small embedded server.
+
+In general, AppAuth can work with any authorization server that supports
+native apps, as documented in [RFC 8252](https://tools.ietf.org/html/rfc8252);
+either through custom URI schemes, or loopback HTTP redirects.
+Authorization servers that assume all clients are web-based, or require clients to maintain
+confidentiality of the client secrets may not work well.
+
+### tvOS
+
+#### Supported Versions
+
+AppAuth supports tvOS 9.0 and above. Please note that while it is possible to run the standard AppAuth library on tvOS, the documentation below describes implementing [OAuth 2.0 Device Authorization Grant](https://tools.ietf.org/html/rfc8628) (AppAuthTV).
+
+#### Authorization Server Requirements
+
+AppAuthTV is designed for servers that support the device authorization flow as documented in [RFC 8628](https://tools.ietf.org/html/rfc8628).
+
+## Try
+
+Want to try out AppAuth? Just run:
+
+    pod try AppAuth
+
+Follow the instructions in [Examples/README.md](Examples/README.md) to configure
+with your own OAuth client (you need to update three configuration points with your
+client info to try the demo).
+
+## Setup
+
+AppAuth supports four options for dependency management.
+
+### CocoaPods
+
+With [CocoaPods](https://guides.cocoapods.org/using/getting-started.html),
+add the following line to your `Podfile`:
+
+    pod 'AppAuth'
+
+Then, run `pod install`.
+
+**tvOS:** Use the `TV` subspec:
+
+    pod 'AppAuth/TV'
+
+
+### Swift Package Manager
+
+With [Swift Package Manager](https://swift.org/package-manager), 
+add the following `dependency` to your `Package.swift`:
+
+```swift
+dependencies: [
+    .package(url: "https://github.com/openid/AppAuth-iOS.git", .upToNextMajor(from: "1.3.0"))
+]
+```
+
+**tvOS:** Use the `AppAuthTV` target.
+
+### Carthage
+
+With [Carthage](https://github.com/Carthage/Carthage), add the following
+line to your `Cartfile`:
+
+    github "openid/AppAuth-iOS" "master"
+
+Then, run `carthage bootstrap`.
+
+**tvOS:** Use the `AppAuthTV` framework.
+
+### Static Library
+
+You can also use AppAuth as a static library. This requires linking the library
+and your project, and including the headers.  Here is a suggested configuration:
+
+1. Create an Xcode Workspace.
+2. Add `AppAuth.xcodeproj` to your Workspace.
+3. Include libAppAuth as a linked library for your target (in the "General ->
+Linked Framework and Libraries" section of your target).
+4. Add `AppAuth-iOS/Source` to your search paths of your target ("Build Settings ->
+"Header Search Paths").
+
+*Note: There is no static library for AppAuthTV.*
+
+## Auth Flow
+
+AppAuth supports both manual interaction with the authorization server
+where you need to perform your own token exchanges, as well as convenience
+methods that perform some of this logic for you. This example uses the
+convenience method, which returns either an `OIDAuthState` object, or an error.
+
+`OIDAuthState` is a class that keeps track of the authorization and token
+requests and responses, and provides a convenience method to call an API with
+fresh tokens. This is the only object that you need to serialize to retain the
+authorization state of the session.
+
+### Configuration
+
+You can configure AppAuth by specifying the endpoints directly:
+
+<sub>Objective-C</sub>
+```objc
+NSURL *authorizationEndpoint =
+    [NSURL URLWithString:@"https://accounts.google.com/o/oauth2/v2/auth"];
+NSURL *tokenEndpoint =
+    [NSURL URLWithString:@"https://www.googleapis.com/oauth2/v4/token"];
+
+OIDServiceConfiguration *configuration =
+    [[OIDServiceConfiguration alloc]
+        initWithAuthorizationEndpoint:authorizationEndpoint
+                        tokenEndpoint:tokenEndpoint];
+
+// perform the auth request...
+```
+
+<sub>Swift</sub>
+```swift
+let authorizationEndpoint = URL(string: "https://accounts.google.com/o/oauth2/v2/auth")!
+let tokenEndpoint = URL(string: "https://www.googleapis.com/oauth2/v4/token")!
+let configuration = OIDServiceConfiguration(authorizationEndpoint: authorizationEndpoint,
+                                            tokenEndpoint: tokenEndpoint)
+
+// perform the auth request...
+```
+
+**tvOS**
+
+<sub>Objective-C</sub>
+```objc
+NSURL *deviceAuthorizationEndpoint =
+    [NSURL URLWithString:@"https://oauth2.googleapis.com/device/code"];
+NSURL *tokenEndpoint =
+    [NSURL URLWithString:@"https://www.googleapis.com/oauth2/v4/token"];
+
+OIDTVServiceConfiguration *configuration =
+    [[OIDTVServiceConfiguration alloc]
+        initWithDeviceAuthorizationEndpoint:deviceAuthorizationEndpoint
+                              tokenEndpoint:tokenEndpoint];
+
+// perform the auth request...
+```
+
+
+Or through discovery:
+
+<sub>Objective-C</sub>
+```objc
+NSURL *issuer = [NSURL URLWithString:@"https://accounts.google.com"];
+
+[OIDAuthorizationService discoverServiceConfigurationForIssuer:issuer
+    completion:^(OIDServiceConfiguration *_Nullable configuration,
+                 NSError *_Nullable error) {
+
+  if (!configuration) {
+    NSLog(@"Error retrieving discovery document: %@",
+          [error localizedDescription]);
+    return;
+  }
+
+  // perform the auth request...
+}];
+```
+
+<sub>Swift</sub>
+```swift
+let issuer = URL(string: "https://accounts.google.com")!
+
+// discovers endpoints
+OIDAuthorizationService.discoverConfiguration(forIssuer: issuer) { configuration, error in
+  guard let config = configuration else {
+    print("Error retrieving discovery document: \(error?.localizedDescription ?? "Unknown error")")
+    return
+  }
+
+  // perform the auth request...
+}
+```
+
+**tvOS**
+
+<sub>Objective-C</sub>
+```objc
+NSURL *issuer = [NSURL URLWithString:@"https://accounts.google.com"];
+
+[OIDTVAuthorizationService discoverServiceConfigurationForIssuer:issuer
+    completion:^(OIDTVServiceConfiguration *_Nullable configuration,
+                 NSError *_Nullable error) {
+
+  if (!configuration) {
+    NSLog(@"Error retrieving discovery document: %@",
+          [error localizedDescription]);
+    return;
+  }
+
+  // perform the auth request...
+}];
+```
+
+### Authorizing – iOS
+
+First, you need to have a property in your `UIApplicationDelegate`
+implementation to hold the session, in order to continue the authorization flow
+from the redirect. In this example, the implementation of this delegate is
+a class named `AppDelegate`, if your app's application delegate has a different
+name, please update the class name in samples below accordingly.
+
+<sub>Objective-C</sub>
+```objc
+@interface AppDelegate : UIResponder <UIApplicationDelegate>
+// property of the app's AppDelegate
+@property(nonatomic, strong, nullable) id<OIDExternalUserAgentSession> currentAuthorizationFlow;
+@end
+```
+
+<sub>Swift</sub>
+```swift
+class AppDelegate: UIResponder, UIApplicationDelegate {
+  // property of the app's AppDelegate
+  var currentAuthorizationFlow: OIDExternalUserAgentSession?
+}
+```
+
+
+And your main class, a property to store the auth state:
+
+<sub>Objective-C</sub>
+```objc
+// property of the containing class
+@property(nonatomic, strong, nullable) OIDAuthState *authState;
+```
+<sub>Swift</sub>
+```swift
+// property of the containing class
+private var authState: OIDAuthState?
+```
+
+
+Then, initiate the authorization request. By using the 
+`authStateByPresentingAuthorizationRequest` convenience method, the token
+exchange will be performed automatically, and everything will be protected with
+PKCE (if the server supports it). AppAuth also lets you perform these
+requests manually. See the `authNoCodeExchange` method in the included Example
+app for a demonstration:
+
+<sub>Objective-C</sub>
+```objc
+// builds authentication request
+OIDAuthorizationRequest *request =
+    [[OIDAuthorizationRequest alloc] initWithConfiguration:configuration
+                                                  clientId:kClientID
+                                                    scopes:@[OIDScopeOpenID,
+                                                             OIDScopeProfile]
+                                               redirectURL:kRedirectURI
+                                              responseType:OIDResponseTypeCode
+                                      additionalParameters:nil];
+
+// performs authentication request
+AppDelegate *appDelegate =
+    (AppDelegate *)[UIApplication sharedApplication].delegate;
+appDelegate.currentAuthorizationFlow =
+    [OIDAuthState authStateByPresentingAuthorizationRequest:request
+        presentingViewController:self
+                        callback:^(OIDAuthState *_Nullable authState,
+                                   NSError *_Nullable error) {
+  if (authState) {
+    NSLog(@"Got authorization tokens. Access token: %@",
+          authState.lastTokenResponse.accessToken);
+    [self setAuthState:authState];
+  } else {
+    NSLog(@"Authorization error: %@", [error localizedDescription]);
+    [self setAuthState:nil];
+  }
+}];
+```
+
+<sub>Swift</sub>
+```swift
+// builds authentication request
+let request = OIDAuthorizationRequest(configuration: configuration,
+                                      clientId: clientID,
+                                      clientSecret: clientSecret,
+                                      scopes: [OIDScopeOpenID, OIDScopeProfile],
+                                      redirectURL: redirectURI,
+                                      responseType: OIDResponseTypeCode,
+                                      additionalParameters: nil)
+
+// performs authentication request
+print("Initiating authorization request with scope: \(request.scope ?? "nil")")
+
+let appDelegate = UIApplication.shared.delegate as! AppDelegate
+
+appDelegate.currentAuthorizationFlow =
+    OIDAuthState.authState(byPresenting: request, presenting: self) { authState, error in
+  if let authState = authState {
+    self.setAuthState(authState)
+    print("Got authorization tokens. Access token: " +
+          "\(authState.lastTokenResponse?.accessToken ?? "nil")")
+  } else {
+    print("Authorization error: \(error?.localizedDescription ?? "Unknown error")")
+    self.setAuthState(nil)
+  }
+}
+```
+
+*Handling the Redirect*
+
+The authorization response URL is returned to the app via the iOS openURL
+app delegate method, so you need to pipe this through to the current
+authorization session (created in the previous session):
+
+<sub>Objective-C</sub>
+```objc
+- (BOOL)application:(UIApplication *)app
+            openURL:(NSURL *)url
+            options:(NSDictionary<NSString *, id> *)options {
+  // Sends the URL to the current authorization flow (if any) which will
+  // process it if it relates to an authorization response.
+  if ([_currentAuthorizationFlow resumeExternalUserAgentFlowWithURL:url]) {
+    _currentAuthorizationFlow = nil;
+    return YES;
+  }
+
+  // Your additional URL handling (if any) goes here.
+
+  return NO;
+}
+```
+
+<sub>Swift</sub>
+```swift
+func application(_ app: UIApplication,
+                 open url: URL,
+                 options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
+  // Sends the URL to the current authorization flow (if any) which will
+  // process it if it relates to an authorization response.
+  if let authorizationFlow = self.currentAuthorizationFlow,
+                             authorizationFlow.resumeExternalUserAgentFlow(with: url) {
+    self.currentAuthorizationFlow = nil
+    return true
+  }
+
+  // Your additional URL handling (if any)
+
+  return false
+}
+```
+
+### Authorizing – MacOS
+
+On macOS, the most popular way to get the authorization response redirect is to
+start a local HTTP server on the loopback interface (limited to incoming
+requests from the user's machine only). When the authorization is complete, the
+user is redirected to that local server, and the authorization response can be
+processed by the app. AppAuth takes care of managing the local HTTP server
+lifecycle for you.
+
+> #### :bulb: Alternative: Custom URI Schemes
+> Custom URI schemes are also supported on macOS, but some browsers display
+> an interstitial, which reduces the usability. For an example on using custom
+> URI schemes with macOS, See `Example-Mac`.
+
+To receive the authorization response using a local HTTP server, first you need
+to have an instance variable in your main class to retain the HTTP redirect
+handler:
+
+<sub>Objective-C</sub>
+```objc
+OIDRedirectHTTPHandler *_redirectHTTPHandler;
+```
+
+Then, as the port used by the local HTTP server varies, you need to start it
+before building the authorization request, in order to get the exact redirect
+URI to use:
+
+<sub>Objective-C</sub>
+```objc
+static NSString *const kSuccessURLString =
+    @"http://openid.github.io/AppAuth-iOS/redirect/";
+NSURL *successURL = [NSURL URLWithString:kSuccessURLString];
+
+// Starts a loopback HTTP redirect listener to receive the code.  This needs to be started first,
+// as the exact redirect URI (including port) must be passed in the authorization request.
+_redirectHTTPHandler = [[OIDRedirectHTTPHandler alloc] initWithSuccessURL:successURL];
+NSURL *redirectURI = [_redirectHTTPHandler startHTTPListener:nil];
+```
+
+Then, initiate the authorization request. By using the 
+`authStateByPresentingAuthorizationRequest` convenience method, the token
+exchange will be performed automatically, and everything will be protected with
+PKCE (if the server supports it). By assigning the return value to the
+`OIDRedirectHTTPHandler`'s `currentAuthorizationFlow`, the authorization will
+continue automatically once the user makes their choice:
+
+```objc
+// builds authentication request
+OIDAuthorizationRequest *request =
+    [[OIDAuthorizationRequest alloc] initWithConfiguration:configuration
+                                                  clientId:kClientID
+                                              clientSecret:kClientSecret
+                                                    scopes:@[ OIDScopeOpenID ]
+                                               redirectURL:redirectURI
+                                              responseType:OIDResponseTypeCode
+                                      additionalParameters:nil];
+// performs authentication request
+__weak __typeof(self) weakSelf = self;
+_redirectHTTPHandler.currentAuthorizationFlow =
+    [OIDAuthState authStateByPresentingAuthorizationRequest:request
+                        callback:^(OIDAuthState *_Nullable authState,
+                                   NSError *_Nullable error) {
+  // Brings this app to the foreground.
+  [[NSRunningApplication currentApplication]
+      activateWithOptions:(NSApplicationActivateAllWindows |
+                           NSApplicationActivateIgnoringOtherApps)];
+
+  // Processes the authorization response.
+  if (authState) {
+    NSLog(@"Got authorization tokens. Access token: %@",
+          authState.lastTokenResponse.accessToken);
+  } else {
+    NSLog(@"Authorization error: %@", error.localizedDescription);
+  }
+  [weakSelf setAuthState:authState];
+}];
+```
+
+
+### Authorizing – tvOS
+
+Ensure that your main class is a delegate of `OIDAuthStateChangeDelegate`, `OIDAuthStateErrorDelegate`, implement the corresponding methods, and include the following property and instance variable:
+
+<sub>Objective-C</sub>
+```objc
+// property of the containing class
+@property(nonatomic, strong, nullable) OIDAuthState *authState;
+
+// instance variable of the containing class
+OIDTVAuthorizationCancelBlock _cancelBlock;
+```
+
+Then, build and perform the authorization request.
+
+<sub>Objective-C</sub>
+```objc
+// builds authentication request
+__weak __typeof(self) weakSelf = self;
+
+OIDTVAuthorizationRequest *request =
+    [[OIDTVAuthorizationRequest alloc] initWithConfiguration:configuration
+                                                    clientId:kClientID
+                                                clientSecret:kClientSecret
+                                                      scopes:@[ OIDScopeOpenID, OIDScopeProfile ]
+                                        additionalParameters:nil];
+
+// performs authentication request
+OIDTVAuthorizationInitialization initBlock =
+    ^(OIDTVAuthorizationResponse *_Nullable response, NSError *_Nullable error) {
+      if (response) {
+        // process authorization response
+        NSLog(@"Got authorization response: %@", response);
+      } else {
+        // handle initialization error
+        NSLog(@"Error: %@", error);
+      }
+    };
+
+OIDTVAuthorizationCompletion completionBlock =
+    ^(OIDAuthState *_Nullable authState, NSError *_Nullable error) {
+      weakSelf.signInView.hidden = YES;
+      if (authState) {
+        NSLog(@"Token response: %@", authState.lastTokenResponse);
+        [weakSelf setAuthState:authState];
+      } else {
+        NSLog(@"Error: %@", error);
+        [weakSelf setAuthState:nil];
+      }
+    };
+
+_cancelBlock = [OIDTVAuthorizationService authorizeTVRequest:request
+                                              initialization:initBlock
+                                                  completion:completionBlock];
+```
+
+### Making API Calls
+
+AppAuth gives you the raw token information, if you need it. However, we
+recommend that users of the `OIDAuthState` convenience wrapper use the provided
+`performActionWithFreshTokens:` method to perform their API calls to avoid
+needing to worry about token freshness:
+
+<sub>Objective-C</sub>
+```objc
+[_authState performActionWithFreshTokens:^(NSString *_Nonnull accessToken,
+                                           NSString *_Nonnull idToken,
+                                           NSError *_Nullable error) {
+  if (error) {
+    NSLog(@"Error fetching fresh tokens: %@", [error localizedDescription]);
+    return;
+  }
+
+  // perform your API request using the tokens
+}];
+```
+
+<sub>Swift</sub>
+```swift
+let userinfoEndpoint = URL(string:"https://openidconnect.googleapis.com/v1/userinfo")!
+self.authState?.performAction() { (accessToken, idToken, error) in
+
+  if error != nil  {
+    print("Error fetching fresh tokens: \(error?.localizedDescription ?? "Unknown error")")
+    return
+  }
+  guard let accessToken = accessToken else {
+    return
+  }
+
+  // Add Bearer token to request
+  var urlRequest = URLRequest(url: userinfoEndpoint)
+  urlRequest.allHTTPHeaderFields = ["Authorization": "Bearer \(accessToken)"]
+
+  // Perform request...
+}
+```
+
+### Custom User-Agents (iOS and macOS)
+
+Each OAuth flow involves presenting an external user-agent to the user, that
+allows them to interact with the OAuth authorization server. Typical examples
+of a user-agent are the user's browser, or an in-app browser tab incarnation
+like `ASWebAuthenticationSession` on iOS.
+
+AppAuth ships with several implementations of an external user-agent out of the
+box, including defaults for iOS and macOS suitable for most cases. The default
+user-agents typically share persistent cookies with the system default browser,
+to improve the chance that the user doesn't need to sign-in all over again.
+
+It is possible to change the user-agent that AppAuth uses, and even write your
+own - all without needing to fork the library.
+
+All implementations of the external user-agent, be they included or created by
+you need to conform to the 
+[`OIDExternalUserAgent`](http://openid.github.io/AppAuth-iOS/docs/latest/protocol_o_i_d_external_user_agent-p.html)
+protocol.
+
+Instances of the `OIDExternalUserAgent`are passed into
+[`OIDAuthState.authStateByPresentingAuthorizationRequest:externalUserAgent:callback`](http://openid.github.io/AppAuth-iOS/docs/latest/interface_o_i_d_auth_state.html#ac762fe2bf95c116f0b437419be211fa1)
+and/or 
+[`OIDAuthorizationService.presentAuthorizationRequest:externalUserAgent:callback:`](http://openid.github.io/AppAuth-iOS/docs/latest/interface_o_i_d_authorization_service.html#ae551f8e6887366a46e49b09b37389b8f)
+rather than using the platform-specific convenience methods (which use the 
+default user-agents for their respective platforms), like 
+[`OIDAuthState.authStateByPresentingAuthorizationRequest:presentingViewController:callback:`](http://openid.github.io/AppAuth-iOS/docs/latest/category_o_i_d_auth_state_07_i_o_s_08.html#ae32fd0732cd3192cd5219f2655a4c85c).
+
+Popular use-cases for writing your own user-agent implementation include needing
+to style the user-agent in ways not supported by AppAuth, and implementing a
+fully custom flow with your own business logic. You can take one of the existing
+implementations as a starting point to copy, rename, and customize to your
+needs.
+
+#### Custom Browser User-Agent
+
+AppAuth for iOS includes a few extra user-agent implementations which you can
+try, or use as a reference for your own implementation. One of them,
+[`OIDExternalUserAgentIOSCustomBrowser`](http://openid.github.io/AppAuth-iOS/docs/latest/interface_o_i_d_external_user_agent_i_o_s_custom_browser.html)
+enables you to use a different browser for authentication, like Chrome for iOS
+or Firefox for iOS.
+
+Here's how to configure AppAuth to use a custom browser using the
+`OIDExternalUserAgentIOSCustomBrowser` user agent:
+
+First, add the following array to your
+[Info.plist](https://github.com/openid/AppAuth-iOS/blob/135f99d2cb4e9d18d310ac2588b905e612461561/Examples/Example-iOS_ObjC/Source/Info.plist#L34)
+(in XCode, right click -> Open As -> Source Code)
+
+```
+    <key>LSApplicationQueriesSchemes</key>
+    <array>
+        <string>googlechromes</string>
+        <string>opera-https</string>
+        <string>firefox</string>
+    </array>
+```
+
+This is required so that AppAuth can test for the browser and open the app store
+if it's not installed (the default behavior of this user-agent). You only need
+to include the URL scheme of the actual browser you intend to use.
+
+<sub>Objective-C</sub>
+```objc
+// performs authentication request
+AppDelegate *appDelegate =
+    (AppDelegate *)[UIApplication sharedApplication].delegate;
+id<OIDExternalUserAgent> userAgent =
+    [OIDExternalUserAgentIOSCustomBrowser CustomBrowserChrome];
+appDelegate.currentAuthorizationFlow =
+    [OIDAuthState authStateByPresentingAuthorizationRequest:request
+        externalUserAgent:userAgent
+                 callback:^(OIDAuthState *_Nullable authState,
+                                   NSError *_Nullable error) {
+  if (authState) {
+    NSLog(@"Got authorization tokens. Access token: %@",
+          authState.lastTokenResponse.accessToken);
+    [self setAuthState:authState];
+  } else {
+    NSLog(@"Authorization error: %@", [error localizedDescription]);
+    [self setAuthState:nil];
+  }
+}];
+```
+
+<sub>Swift</sub>
+```
+guard let appDelegate = UIApplication.shared.delegate as? AppDelegate else {
+            self.logMessage("Error accessing AppDelegate")
+            return
+        }
+let userAgent = OIDExternalUserAgentIOSCustomBrowser.customBrowserChrome()		
+appDelegate.currentAuthorizationFlow = OIDAuthState.authState(byPresenting: request, externalUserAgent: userAgent) { authState, error in
+    if let authState = authState {
+        self.setAuthState(authState)
+        self.logMessage("Got authorization tokens. Access token: \(authState.lastTokenResponse?.accessToken ?? "DEFAULT_TOKEN")")
+    } else {
+        self.logMessage("Authorization error: \(error?.localizedDescription ?? "DEFAULT_ERROR")")
+        self.setAuthState(nil)
+    }
+}
+```
+
+That's it! With those two changes (which you can try on the included sample),
+AppAuth will use Chrome iOS for the authorization request (and open Chrome in
+the App Store if it's not installed).
+
+⚠️**Note: the `OIDExternalUserAgentIOSCustomBrowser` user-agent is not intended for consumer apps**. It is designed for
+advanced enterprise use-cases where the app developers have greater control over
+the operating environment and have special requirements that require a custom
+browser like Chrome.
+
+You don't need to stop with the included external user agents either! Since the
+[`OIDExternalUserAgent`](http://openid.github.io/AppAuth-iOS/docs/latest/protocol_o_i_d_external_user_agent-p.html)
+protocol is part of AppAuth's public API, you can implement your own versions of
+it. In the above example,
+`userAgent = [OIDExternalUserAgentIOSCustomBrowser CustomBrowserChrome]` would
+be replaced with an instantiation of your user-agent implementation.
+
+## API Documentation
+
+Browse the [API documentation](http://openid.github.io/AppAuth-iOS/docs/latest/annotated.html).
+
+## Included Samples
+
+Sample apps that explore core AppAuth features are available for iOS, macOS and tvOS; follow the instructions in [Examples/README.md](Examples/README.md) to get started.

Pods/AppAuth/Source/AppAuth.h

@@ -0,0 +1,92 @@
+/*! @file AppAuth.h
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2015 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import "OIDAuthState.h"
+#import "OIDAuthStateChangeDelegate.h"
+#import "OIDAuthStateErrorDelegate.h"
+#import "OIDAuthorizationRequest.h"
+#import "OIDAuthorizationResponse.h"
+#import "OIDAuthorizationService.h"
+#import "OIDError.h"
+#import "OIDErrorUtilities.h"
+#import "OIDExternalUserAgent.h"
+#import "OIDExternalUserAgentRequest.h"
+#import "OIDExternalUserAgentSession.h"
+#import "OIDGrantTypes.h"
+#import "OIDIDToken.h"
+#import "OIDRegistrationRequest.h"
+#import "OIDRegistrationResponse.h"
+#import "OIDResponseTypes.h"
+#import "OIDScopes.h"
+#import "OIDScopeUtilities.h"
+#import "OIDServiceConfiguration.h"
+#import "OIDServiceDiscovery.h"
+#import "OIDTokenRequest.h"
+#import "OIDTokenResponse.h"
+#import "OIDTokenUtilities.h"
+#import "OIDURLSessionProvider.h"
+#import "OIDEndSessionRequest.h"
+#import "OIDEndSessionResponse.h"
+
+#if TARGET_OS_TV
+#elif TARGET_OS_WATCH
+#elif TARGET_OS_IOS || TARGET_OS_MACCATALYST
+#import "OIDAuthState+IOS.h"
+#import "OIDAuthorizationService+IOS.h"
+#import "OIDExternalUserAgentIOS.h"
+#import "OIDExternalUserAgentIOSCustomBrowser.h"
+#import "OIDExternalUserAgentCatalyst.h"
+#elif TARGET_OS_OSX
+#import "OIDAuthState+Mac.h"
+#import "OIDAuthorizationService+Mac.h"
+#import "OIDExternalUserAgentMac.h"
+#import "OIDRedirectHTTPHandler.h"
+#else
+#error "Platform Undefined"
+#endif
+
+/*! @mainpage AppAuth for iOS and macOS
+
+    @section introduction Introduction
+
+    AppAuth for iOS and macOS is a client SDK for communicating with [OAuth 2.0]
+    (https://tools.ietf.org/html/rfc6749) and [OpenID Connect]
+    (http://openid.net/specs/openid-connect-core-1_0.html) providers. It strives to
+    directly map the requests and responses of those specifications, while following
+    the idiomatic style of the implementation language. In addition to mapping the
+    raw protocol flows, convenience methods are available to assist with common
+    tasks like performing an action with fresh tokens.
+
+    It follows the best practices set out in 
+    [RFC 8252 - OAuth 2.0 for Native Apps](https://tools.ietf.org/html/rfc8252)
+    including using `SFAuthenticationSession` and `SFSafariViewController` on iOS
+    for the auth request. Web view and `WKWebView` are explicitly *not*
+    supported due to the security and usability reasons explained in
+    [Section 8.12 of RFC 8252](https://tools.ietf.org/html/rfc8252#section-8.12).
+
+    It also supports the [PKCE](https://tools.ietf.org/html/rfc7636) extension to
+    OAuth which was created to secure authorization codes in public clients when
+    custom URI scheme redirects are used. The library is friendly to other
+    extensions (standard or otherwise) with the ability to handle additional params
+    in all protocol requests and responses.
+
+    <b>Homepage</b>: http://openid.github.io/AppAuth-iOS/ <br>
+    <b>API Documentation</b>: http://openid.github.io/AppAuth-iOS/docs/latest <br>
+    <b>Git Repository</b>: https://github.com/openid/AppAuth-iOS <br>
+
+ */

Pods/AppAuth/Source/AppAuth/iOS/OIDAuthState+IOS.h

@@ -0,0 +1,84 @@
+/*! @file OIDAuthState+IOS.h
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2016 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_MACCATALYST
+
+#import <UIKit/UIKit.h>
+
+#import "OIDAuthState.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/*! @brief iOS specific convenience methods for @c OIDAuthState.
+ */
+@interface OIDAuthState (IOS)
+
+/*! @brief Convenience method to create a @c OIDAuthState by presenting an authorization request
+        and performing the authorization code exchange in the case of code flow requests. For
+        the hybrid flow, the caller should validate the id_token and c_hash, then perform the token
+        request (@c OIDAuthorizationService.performTokenRequest:callback:)
+        and update the OIDAuthState with the results (@c
+        OIDAuthState.updateWithTokenResponse:error:).
+    @param authorizationRequest The authorization request to present.
+    @param presentingViewController The view controller to use for presenting the authentication UI.
+    @param callback The method called when the request has completed or failed.
+    @return A @c OIDExternalUserAgentSession instance which will terminate when it
+        receives a @c OIDExternalUserAgentSession.cancel message, or after processing a
+        @c OIDExternalUserAgentSession.resumeExternalUserAgentFlowWithURL: message.
+ */
++ (id<OIDExternalUserAgentSession>)
+    authStateByPresentingAuthorizationRequest:(OIDAuthorizationRequest *)authorizationRequest
+                     presentingViewController:(UIViewController *)presentingViewController
+                                     callback:(OIDAuthStateAuthorizationCallback)callback;
+
+/*! @brief Convenience method to create a @c OIDAuthState by presenting an authorization request
+        (optionally using an emphemeral browser session that shares no cookies or data with the
+        normal browser session) and performing the authorization code exchange in the case of code
+        flow requests. For the hybrid flow, the caller should validate the id_token and c_hash, then
+        perform the token request (@c OIDAuthorizationService.performTokenRequest:callback:)
+        and update the OIDAuthState with the results (@c
+        OIDAuthState.updateWithTokenResponse:error:).
+    @param authorizationRequest The authorization request to present.
+    @param presentingViewController The view controller to use for presenting the authentication UI.
+    @param prefersEphemeralSession Whether the caller prefers to use a private authentication
+        session. See @c ASWebAuthenticationSession.prefersEphemeralWebBrowserSession for more.
+    @param callback The method called when the request has completed or failed.
+    @return A @c OIDExternalUserAgentSession instance which will terminate when it
+        receives a @c OIDExternalUserAgentSession.cancel message, or after processing a
+        @c OIDExternalUserAgentSession.resumeExternalUserAgentFlowWithURL: message.
+ */
++ (id<OIDExternalUserAgentSession>)
+    authStateByPresentingAuthorizationRequest:(OIDAuthorizationRequest *)authorizationRequest
+                     presentingViewController:(UIViewController *)presentingViewController
+                      prefersEphemeralSession:(BOOL)prefersEphemeralSession
+                                     callback:(OIDAuthStateAuthorizationCallback)callback
+    API_AVAILABLE(ios(13));
+
++ (id<OIDExternalUserAgentSession>)
+    authStateByPresentingAuthorizationRequest:(OIDAuthorizationRequest *)authorizationRequest
+                     callback:(OIDAuthStateAuthorizationCallback)callback API_AVAILABLE(ios(11)) API_UNAVAILABLE(macCatalyst)
+    __deprecated_msg("This method will not work on iOS 13. Use "
+        "authStateByPresentingAuthorizationRequest:presentingViewController:callback:");
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif // TARGET_OS_IOS || TARGET_OS_MACCATALYST

Pods/AppAuth/Source/AppAuth/iOS/OIDAuthState+IOS.m

@@ -0,0 +1,78 @@
+/*! @file OIDAuthState+IOS.m
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2016 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_MACCATALYST
+
+#import "OIDAuthState+IOS.h"
+#import "OIDExternalUserAgentIOS.h"
+#import "OIDExternalUserAgentCatalyst.h"
+
+@implementation OIDAuthState (IOS)
+
++ (id<OIDExternalUserAgentSession>)
+    authStateByPresentingAuthorizationRequest:(OIDAuthorizationRequest *)authorizationRequest
+                     presentingViewController:(UIViewController *)presentingViewController
+                                     callback:(OIDAuthStateAuthorizationCallback)callback {
+  id<OIDExternalUserAgent> externalUserAgent;
+#if TARGET_OS_MACCATALYST
+  externalUserAgent = [[OIDExternalUserAgentCatalyst alloc]
+      initWithPresentingViewController:presentingViewController];
+#else // TARGET_OS_MACCATALYST
+  externalUserAgent = [[OIDExternalUserAgentIOS alloc] initWithPresentingViewController:presentingViewController];
+#endif // TARGET_OS_MACCATALYST
+  return [self authStateByPresentingAuthorizationRequest:authorizationRequest
+                                       externalUserAgent:externalUserAgent
+                                                callback:callback];
+}
+
++ (id<OIDExternalUserAgentSession>)
+    authStateByPresentingAuthorizationRequest:(OIDAuthorizationRequest *)authorizationRequest
+                     presentingViewController:(UIViewController *)presentingViewController
+                      prefersEphemeralSession:(BOOL)prefersEphemeralSession
+                                     callback:(OIDAuthStateAuthorizationCallback)callback {
+  id<OIDExternalUserAgent> externalUserAgent;
+#if TARGET_OS_MACCATALYST
+  externalUserAgent = [[OIDExternalUserAgentCatalyst alloc]
+          initWithPresentingViewController:presentingViewController
+                   prefersEphemeralSession:prefersEphemeralSession];
+#else // TARGET_OS_MACCATALYST
+  externalUserAgent = [[OIDExternalUserAgentIOS alloc]
+          initWithPresentingViewController:presentingViewController
+                   prefersEphemeralSession:prefersEphemeralSession];
+#endif // TARGET_OS_MACCATALYST
+  return [self authStateByPresentingAuthorizationRequest:authorizationRequest
+                                       externalUserAgent:externalUserAgent
+                                                callback:callback];
+}
+
+#if !TARGET_OS_MACCATALYST
++ (id<OIDExternalUserAgentSession>)
+    authStateByPresentingAuthorizationRequest:(OIDAuthorizationRequest *)authorizationRequest
+                                  callback:(OIDAuthStateAuthorizationCallback)callback {
+  OIDExternalUserAgentIOS *externalUserAgent = [[OIDExternalUserAgentIOS alloc] init];
+  return [self authStateByPresentingAuthorizationRequest:authorizationRequest
+                                       externalUserAgent:externalUserAgent
+                                                callback:callback];
+}
+#endif // !TARGET_OS_MACCATALYST
+
+@end
+
+#endif // TARGET_OS_IOS || TARGET_OS_MACCATALYST

Pods/AppAuth/Source/AppAuth/iOS/OIDAuthorizationService+IOS.h

@@ -0,0 +1,67 @@
+/*! @file OIDAuthorizationService+IOS.h
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2016 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_MACCATALYST
+
+#import <UIKit/UIKit.h>
+
+#import "OIDAuthorizationService.h"
+#import "OIDExternalUserAgentSession.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/*! @brief Provides iOS specific authorization request handling.
+ */
+@interface OIDAuthorizationService (IOS)
+
+/*! @brief Perform an authorization flow, presenting an appropriate browser for the user to
+        authenticate.
+    @param request The authorization request.
+    @param presentingViewController The view controller from which to present authentication UI.
+    @param callback The method called when the request has completed or failed.
+    @return A @c OIDExternalUserAgentSession instance which will terminate when it
+        receives a @c OIDExternalUserAgentSession.cancel message, or after processing a
+        @c OIDExternalUserAgentSession.resumeExternalUserAgentFlowWithURL: message.
+ */
++ (id<OIDExternalUserAgentSession>) presentAuthorizationRequest:(OIDAuthorizationRequest *)request
+    presentingViewController:(UIViewController *)presentingViewController
+                    callback:(OIDAuthorizationCallback)callback;
+
+/*! @brief Perform an authorization flow using the @c ASWebAuthenticationSession optionally using an
+        emphemeral browser session that shares no cookies or data with the normal browser session.
+    @param request The authorization request.
+    @param presentingViewController The view controller from which to present authentication UI.
+    @param prefersEphemeralSession Whether the caller prefers to use a private authentication
+        session. See @c ASWebAuthenticationSession.prefersEphemeralWebBrowserSession for more.
+    @param callback The method called when the request has completed or failed.
+    @return A @c OIDExternalUserAgentSession instance which will terminate when it
+        receives a @c OIDExternalUserAgentSession.cancel message, or after processing a
+        @c OIDExternalUserAgentSession.resumeExternalUserAgentFlowWithURL: message.
+ */
++ (id<OIDExternalUserAgentSession>) presentAuthorizationRequest:(OIDAuthorizationRequest *)request
+    presentingViewController:(UIViewController *)presentingViewController
+     prefersEphemeralSession:(BOOL)prefersEphemeralSession
+                    callback:(OIDAuthorizationCallback)callback API_AVAILABLE(ios(13));
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif // TARGET_OS_IOS || TARGET_OS_MACCATALYST

Pods/AppAuth/Source/AppAuth/iOS/OIDAuthorizationService+IOS.m

@@ -0,0 +1,64 @@
+/*! @file OIDAuthorizationService+IOS.m
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2016 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_MACCATALYST
+
+#import "OIDAuthorizationService+IOS.h"
+#import "OIDExternalUserAgentIOS.h"
+#import "OIDExternalUserAgentCatalyst.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@implementation OIDAuthorizationService (IOS)
+
++ (id<OIDExternalUserAgentSession>) presentAuthorizationRequest:(OIDAuthorizationRequest *)request
+    presentingViewController:(UIViewController *)presentingViewController
+                    callback:(OIDAuthorizationCallback)callback {
+  id<OIDExternalUserAgent> externalUserAgent;
+#if TARGET_OS_MACCATALYST
+  externalUserAgent = [[OIDExternalUserAgentCatalyst alloc]
+      initWithPresentingViewController:presentingViewController];
+#else // TARGET_OS_MACCATALYST
+  externalUserAgent = [[OIDExternalUserAgentIOS alloc] initWithPresentingViewController:presentingViewController];
+#endif // TARGET_OS_MACCATALYST
+  return [self presentAuthorizationRequest:request externalUserAgent:externalUserAgent callback:callback];
+}
+
++ (id<OIDExternalUserAgentSession>) presentAuthorizationRequest:(OIDAuthorizationRequest *)request
+    presentingViewController:(UIViewController *)presentingViewController
+     prefersEphemeralSession:(BOOL)prefersEphemeralSession
+                    callback:(OIDAuthorizationCallback)callback {
+  id<OIDExternalUserAgent> externalUserAgent;
+#if TARGET_OS_MACCATALYST
+  externalUserAgent = [[OIDExternalUserAgentCatalyst alloc]
+      initWithPresentingViewController:presentingViewController
+                       prefersEphemeralSession:prefersEphemeralSession];
+#else // TARGET_OS_MACCATALYST
+  externalUserAgent = [[OIDExternalUserAgentIOS alloc] initWithPresentingViewController:presentingViewController
+               prefersEphemeralSession:prefersEphemeralSession];
+#endif // TARGET_OS_MACCATALYST
+  return [self presentAuthorizationRequest:request externalUserAgent:externalUserAgent callback:callback];
+}
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif // TARGET_OS_IOS || TARGET_OS_MACCATALYST

Pods/AppAuth/Source/AppAuth/iOS/OIDExternalUserAgentCatalyst.h

@@ -0,0 +1,61 @@
+/*! @file OIDExternalUserAgentCatalyst.h
+   @brief AppAuth iOS SDK
+   @copyright
+       Copyright 2019 The AppAuth Authors. All Rights Reserved.
+   @copydetails
+       Licensed under the Apache License, Version 2.0 (the "License");
+       you may not use this file except in compliance with the License.
+       You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+       Unless required by applicable law or agreed to in writing, software
+       distributed under the License is distributed on an "AS IS" BASIS,
+       WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+       See the License for the specific language governing permissions and
+       limitations under the License.
+*/
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_MACCATALYST
+
+#import <UIKit/UIKit.h>
+
+#import "OIDExternalUserAgent.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/*! @brief A Catalyst specific external user-agent that uses `ASWebAuthenticationSession` to
+       present the request.
+*/
+API_AVAILABLE(macCatalyst(13)) API_UNAVAILABLE(ios)
+@interface OIDExternalUserAgentCatalyst : NSObject<OIDExternalUserAgent>
+
+/*! @internal
+    @brief Unavailable. Please use @c initWithPresentingViewController:
+ */
+- (nonnull instancetype)init NS_UNAVAILABLE;
+
+/*! @brief The designated initializer.
+    @param presentingViewController The view controller from which to present the
+        \SFSafariViewController.
+ */
+- (nullable instancetype)initWithPresentingViewController:
+    (UIViewController *)presentingViewController
+    NS_DESIGNATED_INITIALIZER;
+
+/*! @brief Create an external user-agent which optionally uses a private authentication session.
+    @param presentingViewController The view controller from which to present the browser.
+    @param prefersEphemeralSession Whether the caller prefers to use a private authentication
+        session. See @c ASWebAuthenticationSession.prefersEphemeralWebBrowserSession for more.
+ */
+- (nullable instancetype)initWithPresentingViewController:
+    (UIViewController *)presentingViewController
+                                  prefersEphemeralSession:(BOOL)prefersEphemeralSession;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif // TARGET_OS_IOS || TARGET_OS_MACCATALYST

Pods/AppAuth/Source/AppAuth/iOS/OIDExternalUserAgentCatalyst.m

@@ -0,0 +1,157 @@
+/*! @file OIDExternalUserAgentCatalyst.m
+   @brief AppAuth iOS SDK
+   @copyright
+       Copyright 2019 The AppAuth Authors. All Rights Reserved.
+   @copydetails
+       Licensed under the Apache License, Version 2.0 (the "License");
+       you may not use this file except in compliance with the License.
+       You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+       Unless required by applicable law or agreed to in writing, software
+       distributed under the License is distributed on an "AS IS" BASIS,
+       WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+       See the License for the specific language governing permissions and
+       limitations under the License.
+*/
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_MACCATALYST
+
+#import "OIDExternalUserAgentCatalyst.h"
+
+#import <SafariServices/SafariServices.h>
+#import <AuthenticationServices/AuthenticationServices.h>
+
+#import "OIDErrorUtilities.h"
+#import "OIDExternalUserAgentSession.h"
+#import "OIDExternalUserAgentRequest.h"
+
+#if TARGET_OS_MACCATALYST
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface OIDExternalUserAgentCatalyst ()<ASWebAuthenticationPresentationContextProviding>
+@end
+
+@implementation OIDExternalUserAgentCatalyst {
+  UIViewController *_presentingViewController;
+  BOOL _prefersEphemeralSession;
+
+  BOOL _externalUserAgentFlowInProgress;
+  __weak id<OIDExternalUserAgentSession> _session;
+  ASWebAuthenticationSession *_webAuthenticationVC;
+}
+
+- (nullable instancetype)initWithPresentingViewController:
+    (UIViewController *)presentingViewController {
+  self = [super init];
+  if (self) {
+    _presentingViewController = presentingViewController;
+  }
+  return self;
+}
+
+- (nullable instancetype)initWithPresentingViewController:
+    (UIViewController *)presentingViewController
+                                  prefersEphemeralSession:(BOOL)prefersEphemeralSession {
+  self = [self initWithPresentingViewController:presentingViewController];
+  if (self) {
+    _prefersEphemeralSession = prefersEphemeralSession;
+  }
+  return self;
+}
+
+- (BOOL)presentExternalUserAgentRequest:(id<OIDExternalUserAgentRequest>)request
+                                session:(id<OIDExternalUserAgentSession>)session {
+  if (_externalUserAgentFlowInProgress) {
+    // TODO: Handle errors as authorization is already in progress.
+    return NO;
+  }
+
+  _externalUserAgentFlowInProgress = YES;
+  _session = session;
+  BOOL openedUserAgent = NO;
+  NSURL *requestURL = [request externalUserAgentRequestURL];
+
+  __weak OIDExternalUserAgentCatalyst *weakSelf = self;
+  NSString *redirectScheme = request.redirectScheme;
+  ASWebAuthenticationSession *authenticationVC =
+      [[ASWebAuthenticationSession alloc] initWithURL:requestURL
+                                    callbackURLScheme:redirectScheme
+                                    completionHandler:^(NSURL * _Nullable callbackURL,
+                                                        NSError * _Nullable error) {
+    __strong OIDExternalUserAgentCatalyst *strongSelf = weakSelf;
+    if (!strongSelf) {
+        return;
+    }
+    strongSelf->_webAuthenticationVC = nil;
+    if (callbackURL) {
+      [strongSelf->_session resumeExternalUserAgentFlowWithURL:callbackURL];
+    } else {
+      NSError *safariError =
+          [OIDErrorUtilities errorWithCode:OIDErrorCodeUserCanceledAuthorizationFlow
+                           underlyingError:error
+                               description:nil];
+      [strongSelf->_session failExternalUserAgentFlowWithError:safariError];
+    }
+  }];
+      
+  authenticationVC.presentationContextProvider = self;
+  authenticationVC.prefersEphemeralWebBrowserSession = _prefersEphemeralSession;
+  _webAuthenticationVC = authenticationVC;
+  openedUserAgent = [authenticationVC start];
+
+  if (!openedUserAgent) {
+    [self cleanUp];
+    NSError *safariError = [OIDErrorUtilities errorWithCode:OIDErrorCodeSafariOpenError
+                                            underlyingError:nil
+                                                description:@"Unable to open ASWebAuthenticationSession view controller."];
+    [session failExternalUserAgentFlowWithError:safariError];
+  }
+  return openedUserAgent;
+}
+
+- (void)dismissExternalUserAgentAnimated:(BOOL)animated completion:(void (^)(void))completion {
+  if (!_externalUserAgentFlowInProgress) {
+    // Ignore this call if there is no authorization flow in progress.
+    if (completion) completion();
+    return;
+  }
+  
+  ASWebAuthenticationSession *webAuthenticationVC = _webAuthenticationVC;
+  
+  [self cleanUp];
+  
+  if (webAuthenticationVC) {
+    // dismiss the ASWebAuthenticationSession
+    [webAuthenticationVC cancel];
+    if (completion) completion();
+  } else {
+    if (completion) completion();
+  }
+}
+
+- (void)cleanUp {
+  // The weak reference to |_session| is set to nil to avoid accidentally using
+  // it while not in an authorization flow.
+  _webAuthenticationVC = nil;
+  _session = nil;
+  _externalUserAgentFlowInProgress = NO;
+}
+
+#pragma mark - ASWebAuthenticationPresentationContextProviding
+
+- (ASPresentationAnchor)presentationAnchorForWebAuthenticationSession:(ASWebAuthenticationSession *)session {
+  return _presentingViewController.view.window;
+}
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif // TARGET_OS_MACCATALYST
+
+#endif // TARGET_OS_IOS || TARGET_OS_MACCATALYST

Pods/AppAuth/Source/AppAuth/iOS/OIDExternalUserAgentIOS.h

@@ -0,0 +1,69 @@
+/*! @file OIDExternalUserAgentIOS.h
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2016 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_MACCATALYST
+
+#import <UIKit/UIKit.h>
+
+#import "OIDExternalUserAgent.h"
+
+@class SFSafariViewController;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/*! @brief An iOS specific external user-agent that uses the best possible user-agent available
+        depending on the version of iOS to present the request.
+ */
+API_UNAVAILABLE(macCatalyst)
+@interface OIDExternalUserAgentIOS : NSObject<OIDExternalUserAgent>
+
+- (nullable instancetype)init API_AVAILABLE(ios(11))
+    __deprecated_msg("This method will not work on iOS 13, use "
+                     "initWithPresentingViewController:presentingViewController");
+
+/*! @brief The designated initializer.
+    @param presentingViewController The view controller from which to present the authentication UI.
+    @discussion The specific authentication UI used depends on the iOS version and accessibility
+        options. iOS 8 uses the system browser, iOS 9-10 use @c SFSafariViewController, iOS 11 uses
+        @c SFAuthenticationSession
+        (unless Guided Access is on which does not work) or uses @c SFSafariViewController, and iOS
+        12+ uses @c ASWebAuthenticationSession (unless Guided Access is on).
+ */
+- (nullable instancetype)initWithPresentingViewController:
+    (UIViewController *)presentingViewController
+    NS_DESIGNATED_INITIALIZER;
+
+/*! @brief Create an external user-agent which optionally uses a private authentication session.
+    @param presentingViewController The view controller from which to present the browser.
+    @param prefersEphemeralSession Whether the caller prefers to use a private authentication
+        session. See @c ASWebAuthenticationSession.prefersEphemeralWebBrowserSession for more.
+    @discussion Authentication is performed with @c ASWebAuthenticationSession (unless Guided Access
+        is on), setting the ephemerality based on the argument.
+ */
+- (nullable instancetype)initWithPresentingViewController:
+    (UIViewController *)presentingViewController
+                                  prefersEphemeralSession:(BOOL)prefersEphemeralSession
+    API_AVAILABLE(ios(13));
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif // TARGET_OS_IOS || TARGET_OS_MACCATALYST

Pods/AppAuth/Source/AppAuth/iOS/OIDExternalUserAgentIOS.m

@@ -0,0 +1,268 @@
+/*! @file OIDExternalUserAgentIOS.m
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2016 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_MACCATALYST
+
+#import "OIDExternalUserAgentIOS.h"
+
+#import <SafariServices/SafariServices.h>
+#import <AuthenticationServices/AuthenticationServices.h>
+
+#import "OIDErrorUtilities.h"
+#import "OIDExternalUserAgentSession.h"
+#import "OIDExternalUserAgentRequest.h"
+
+#if !TARGET_OS_MACCATALYST
+
+NS_ASSUME_NONNULL_BEGIN
+
+#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000
+@interface OIDExternalUserAgentIOS ()<SFSafariViewControllerDelegate, ASWebAuthenticationPresentationContextProviding>
+@end
+#else
+@interface OIDExternalUserAgentIOS ()<SFSafariViewControllerDelegate>
+@end
+#endif
+
+@implementation OIDExternalUserAgentIOS {
+  UIViewController *_presentingViewController;
+  BOOL _prefersEphemeralSession;
+
+  BOOL _externalUserAgentFlowInProgress;
+  __weak id<OIDExternalUserAgentSession> _session;
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wpartial-availability"
+  __weak SFSafariViewController *_safariVC;
+  SFAuthenticationSession *_authenticationVC;
+  ASWebAuthenticationSession *_webAuthenticationVC;
+#pragma clang diagnostic pop
+}
+
+- (nullable instancetype)init {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wnonnull"
+  return [self initWithPresentingViewController:nil];
+#pragma clang diagnostic pop
+}
+
+- (nullable instancetype)initWithPresentingViewController:
+    (UIViewController *)presentingViewController {
+  self = [super init];
+  if (self) {
+#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000
+    NSAssert(presentingViewController != nil,
+             @"presentingViewController cannot be nil on iOS 13");
+#endif // __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000
+    
+    _presentingViewController = presentingViewController;
+  }
+  return self;
+}
+
+- (nullable instancetype)initWithPresentingViewController:
+    (UIViewController *)presentingViewController
+                                  prefersEphemeralSession:(BOOL)prefersEphemeralSession {
+  self = [self initWithPresentingViewController:presentingViewController];
+  if (self) {
+    _prefersEphemeralSession = prefersEphemeralSession;
+  }
+  return self;
+}
+
+- (BOOL)presentExternalUserAgentRequest:(id<OIDExternalUserAgentRequest>)request
+                                session:(id<OIDExternalUserAgentSession>)session {
+  if (_externalUserAgentFlowInProgress) {
+    // TODO: Handle errors as authorization is already in progress.
+    return NO;
+  }
+
+  _externalUserAgentFlowInProgress = YES;
+  _session = session;
+  BOOL openedUserAgent = NO;
+  NSURL *requestURL = [request externalUserAgentRequestURL];
+
+  // iOS 12 and later, use ASWebAuthenticationSession
+  if (@available(iOS 12.0, *)) {
+    // ASWebAuthenticationSession doesn't work with guided access (rdar://40809553)
+    if (!UIAccessibilityIsGuidedAccessEnabled()) {
+      __weak OIDExternalUserAgentIOS *weakSelf = self;
+      NSString *redirectScheme = request.redirectScheme;
+      ASWebAuthenticationSession *authenticationVC =
+          [[ASWebAuthenticationSession alloc] initWithURL:requestURL
+                                        callbackURLScheme:redirectScheme
+                                        completionHandler:^(NSURL * _Nullable callbackURL,
+                                                            NSError * _Nullable error) {
+        __strong OIDExternalUserAgentIOS *strongSelf = weakSelf;
+        if (!strongSelf) {
+            return;
+        }
+        strongSelf->_webAuthenticationVC = nil;
+        if (callbackURL) {
+          [strongSelf->_session resumeExternalUserAgentFlowWithURL:callbackURL];
+        } else {
+          NSError *safariError =
+              [OIDErrorUtilities errorWithCode:OIDErrorCodeUserCanceledAuthorizationFlow
+                               underlyingError:error
+                                   description:nil];
+          [strongSelf->_session failExternalUserAgentFlowWithError:safariError];
+        }
+      }];
+#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000
+      if (@available(iOS 13.0, *)) {
+        authenticationVC.presentationContextProvider = self;
+        authenticationVC.prefersEphemeralWebBrowserSession = _prefersEphemeralSession;
+      }
+#endif
+      _webAuthenticationVC = authenticationVC;
+      openedUserAgent = [authenticationVC start];
+    }
+  }
+  // iOS 11, use SFAuthenticationSession
+  if (@available(iOS 11.0, *)) {
+    // SFAuthenticationSession doesn't work with guided access (rdar://40809553)
+    if (!openedUserAgent && !UIAccessibilityIsGuidedAccessEnabled()) {
+      __weak OIDExternalUserAgentIOS *weakSelf = self;
+      NSString *redirectScheme = request.redirectScheme;
+      SFAuthenticationSession *authenticationVC =
+          [[SFAuthenticationSession alloc] initWithURL:requestURL
+                                     callbackURLScheme:redirectScheme
+                                     completionHandler:^(NSURL * _Nullable callbackURL,
+                                                         NSError * _Nullable error) {
+        __strong OIDExternalUserAgentIOS *strongSelf = weakSelf;
+        if (!strongSelf) {
+            return;
+        }
+        strongSelf->_authenticationVC = nil;
+        if (callbackURL) {
+          [strongSelf->_session resumeExternalUserAgentFlowWithURL:callbackURL];
+        } else {
+          NSError *safariError =
+              [OIDErrorUtilities errorWithCode:OIDErrorCodeUserCanceledAuthorizationFlow
+                               underlyingError:error
+                                   description:@"User cancelled."];
+          [strongSelf->_session failExternalUserAgentFlowWithError:safariError];
+        }
+      }];
+      _authenticationVC = authenticationVC;
+      openedUserAgent = [authenticationVC start];
+    }
+  }
+  // iOS 9 and 10, use SFSafariViewController
+  if (@available(iOS 9.0, *)) {
+    if (!openedUserAgent && _presentingViewController) {
+      SFSafariViewController *safariVC =
+          [[SFSafariViewController alloc] initWithURL:requestURL];
+      safariVC.delegate = self;
+      _safariVC = safariVC;
+      [_presentingViewController presentViewController:safariVC animated:YES completion:nil];
+      openedUserAgent = YES;
+    }
+  }
+  // iOS 8 and earlier, use mobile Safari
+  if (!openedUserAgent){
+    openedUserAgent = [[UIApplication sharedApplication] openURL:requestURL];
+  }
+
+  if (!openedUserAgent) {
+    [self cleanUp];
+    NSError *safariError = [OIDErrorUtilities errorWithCode:OIDErrorCodeSafariOpenError
+                                            underlyingError:nil
+                                                description:@"Unable to open Safari."];
+    [session failExternalUserAgentFlowWithError:safariError];
+  }
+  return openedUserAgent;
+}
+
+- (void)dismissExternalUserAgentAnimated:(BOOL)animated completion:(void (^)(void))completion {
+  if (!_externalUserAgentFlowInProgress) {
+    // Ignore this call if there is no authorization flow in progress.
+    if (completion) completion();
+    return;
+  }
+  
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wpartial-availability"
+  SFSafariViewController *safariVC = _safariVC;
+  SFAuthenticationSession *authenticationVC = _authenticationVC;
+  ASWebAuthenticationSession *webAuthenticationVC = _webAuthenticationVC;
+#pragma clang diagnostic pop
+  
+  [self cleanUp];
+  
+  if (webAuthenticationVC) {
+    // dismiss the ASWebAuthenticationSession
+    [webAuthenticationVC cancel];
+    if (completion) completion();
+  } else if (authenticationVC) {
+    // dismiss the SFAuthenticationSession
+    [authenticationVC cancel];
+    if (completion) completion();
+  } else if (safariVC) {
+    // dismiss the SFSafariViewController
+    [safariVC dismissViewControllerAnimated:YES completion:completion];
+  } else {
+    if (completion) completion();
+  }
+}
+
+- (void)cleanUp {
+  // The weak references to |_safariVC| and |_session| are set to nil to avoid accidentally using
+  // them while not in an authorization flow.
+  _safariVC = nil;
+  _authenticationVC = nil;
+  _webAuthenticationVC = nil;
+  _session = nil;
+  _externalUserAgentFlowInProgress = NO;
+}
+
+#pragma mark - SFSafariViewControllerDelegate
+
+- (void)safariViewControllerDidFinish:(SFSafariViewController *)controller NS_AVAILABLE_IOS(9.0) {
+  if (controller != _safariVC) {
+    // Ignore this call if the safari view controller do not match.
+    return;
+  }
+  if (!_externalUserAgentFlowInProgress) {
+    // Ignore this call if there is no authorization flow in progress.
+    return;
+  }
+  id<OIDExternalUserAgentSession> session = _session;
+  [self cleanUp];
+  NSError *error = [OIDErrorUtilities errorWithCode:OIDErrorCodeUserCanceledAuthorizationFlow
+                                    underlyingError:nil
+                                        description:@"No external user agent flow in progress."];
+  [session failExternalUserAgentFlowWithError:error];
+}
+
+#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000
+#pragma mark - ASWebAuthenticationPresentationContextProviding
+
+- (ASPresentationAnchor)presentationAnchorForWebAuthenticationSession:(ASWebAuthenticationSession *)session API_AVAILABLE(ios(13.0)){
+  return _presentingViewController.view.window;
+}
+#endif // __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif // !TARGET_OS_MACCATALYST
+
+#endif // TARGET_OS_IOS || TARGET_OS_MACCATALYST

Pods/AppAuth/Source/AppAuth/iOS/OIDExternalUserAgentIOSCustomBrowser.h

@@ -0,0 +1,113 @@
+/*! @file OIDExternalUserAgentIOSCustomBrowser.h
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2018 Google LLC
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_MACCATALYST
+
+#import <Foundation/Foundation.h>
+
+#import "OIDExternalUserAgent.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/*! @brief A block that transforms a regular http/https URL into one that will open in an
+        alternative browser.
+    @param requestURL the http/https request URL to be transformed.
+    @return transformed URL.
+ */
+typedef NSURL *_Nullable (^OIDCustomBrowserURLTransformation)(NSURL *_Nullable requestURL);
+
+/*! @brief An implementation of the OIDExternalUserAgent protocol for iOS that uses
+        a custom browser (i.e. not Safari) for external requests. It is suitable for browsers that
+        offer a custom url scheme that simply replaces the "https" scheme. It is not designed
+        for browsers that require other modifications to the URL.  If the browser is not installed
+        the user will be prompted to install it.
+ */
+API_UNAVAILABLE(macCatalyst)
+@interface OIDExternalUserAgentIOSCustomBrowser : NSObject<OIDExternalUserAgent>
+
+/*! @brief URL transformation block for the browser.
+ */
+@property(nonatomic, readonly) OIDCustomBrowserURLTransformation URLTransformation;
+
+/*! @brief URL Scheme used to test for whether the browser is installed.
+ */
+@property(nonatomic, readonly, nullable) NSString *canOpenURLScheme;
+
+/*! @brief URL of the browser's App Store listing.
+ */
+@property(nonatomic, readonly, nullable) NSURL *appStoreURL;
+
+/*! @brief An instance of @c OIDExternalUserAgentIOSCustomBrowser for Chrome.
+ */
++ (instancetype)CustomBrowserChrome;
+
+/*! @brief An instance of @c OIDExternalUserAgentIOSCustomBrowser for Firefox.
+ */
++ (instancetype)CustomBrowserFirefox;
+
+/*! @brief An instance of @c OIDExternalUserAgentIOSCustomBrowser for Opera.
+ */
++ (instancetype)CustomBrowserOpera;
+
+/*! @brief An instance of @c OIDExternalUserAgentIOSCustomBrowser for Safari.
+ */
++ (instancetype)CustomBrowserSafari;
+
+/*! @brief Creates a @c OIDCustomBrowserURLTransformation using the scheme substitution method used
+        iOS browsers like Chrome and Firefox.
+ */
++ (OIDCustomBrowserURLTransformation)
+    URLTransformationSchemeSubstitutionHTTPS:(NSString *)browserSchemeHTTPS
+                                        HTTP:(nullable NSString *)browserSchemeHTTP;
+
+/*! @brief Creates a @c OIDCustomBrowserURLTransformation with the URL prefix method used by
+        iOS browsers like Firefox.
+ */
++ (OIDCustomBrowserURLTransformation) URLTransformationSchemeConcatPrefix:(NSString*)URLprefix;
+
+/*! @internal
+    @brief Unavailable. Please use @c initWithURLTransformation:canOpenURLScheme:appStoreURL:
+ */
+- (nonnull instancetype)init NS_UNAVAILABLE;
+
+/*! @brief OIDExternalUserAgent for a custom browser. @c presentExternalUserAgentRequest:session method
+        will return NO if the browser isn't installed.
+ */
+- (nullable instancetype)initWithURLTransformation:(OIDCustomBrowserURLTransformation)URLTransformation;
+
+/*! @brief The designated initializer.
+    @param URLTransformation the transformation block to translate the URL into one that will open
+        in the desired custom browser.
+    @param canOpenURLScheme any scheme supported by the browser used to check if the browser is
+        installed.
+    @param appStoreURL URL of the browser in the app store. When this and @c canOpenURLScheme
+        are non-nil, @c presentExternalUserAgentRequest:session will redirect the user to the app store
+        if the browser is not installed.
+ */
+- (nullable instancetype)initWithURLTransformation:(OIDCustomBrowserURLTransformation)URLTransformation
+                                  canOpenURLScheme:(nullable NSString *)canOpenURLScheme
+                                       appStoreURL:(nullable NSURL *)appStoreURL
+    NS_DESIGNATED_INITIALIZER;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif // TARGET_OS_IOS || TARGET_OS_MACCATALYST

Pods/AppAuth/Source/AppAuth/iOS/OIDExternalUserAgentIOSCustomBrowser.m

@@ -0,0 +1,171 @@
+/*! @file OIDExternalUserAgentIOSCustomBrowser.m
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2018 Google LLC
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_MACCATALYST
+
+#import "OIDExternalUserAgentIOSCustomBrowser.h"
+
+#import <UIKit/UIKit.h>
+
+#import "OIDAuthorizationRequest.h"
+#import "OIDAuthorizationService.h"
+#import "OIDErrorUtilities.h"
+#import "OIDURLQueryComponent.h"
+
+#if !TARGET_OS_MACCATALYST
+
+NS_ASSUME_NONNULL_BEGIN
+
+@implementation OIDExternalUserAgentIOSCustomBrowser
+
++ (instancetype)CustomBrowserChrome {
+  // Chrome iOS documentation: https://developer.chrome.com/multidevice/ios/links
+  OIDCustomBrowserURLTransformation transform = [[self class] URLTransformationSchemeSubstitutionHTTPS:@"googlechromes" HTTP:@"googlechrome"];
+  NSURL *appStoreURL =
+  [NSURL URLWithString:@"https://itunes.apple.com/us/app/chrome/id535886823"];
+  return [[[self class] alloc] initWithURLTransformation:transform
+                                        canOpenURLScheme:@"googlechromes"
+                                             appStoreURL:appStoreURL];
+}
+
++ (instancetype)CustomBrowserFirefox {
+  // Firefox iOS documentation: https://github.com/mozilla-mobile/firefox-ios-open-in-client
+  OIDCustomBrowserURLTransformation transform =
+      [[self class] URLTransformationSchemeConcatPrefix:@"firefox://open-url?url="];
+  NSURL *appStoreURL =
+  [NSURL URLWithString:@"https://itunes.apple.com/us/app/firefox-web-browser/id989804926"];
+  return [[[self class] alloc] initWithURLTransformation:transform
+                                        canOpenURLScheme:@"firefox"
+                                             appStoreURL:appStoreURL];
+}
+
++ (instancetype)CustomBrowserOpera {
+  OIDCustomBrowserURLTransformation transform =
+      [[self class] URLTransformationSchemeSubstitutionHTTPS:@"opera-https" HTTP:@"opera-http"];
+  NSURL *appStoreURL =
+  [NSURL URLWithString:@"https://itunes.apple.com/us/app/opera-mini-web-browser/id363729560"];
+  return [[[self class] alloc] initWithURLTransformation:transform
+                                        canOpenURLScheme:@"opera-https"
+                                             appStoreURL:appStoreURL];
+}
+
++ (instancetype)CustomBrowserSafari {
+  OIDCustomBrowserURLTransformation transformNOP = ^NSURL *(NSURL *requestURL) {
+    return requestURL;
+  };
+  OIDExternalUserAgentIOSCustomBrowser *transform =
+      [[[self class] alloc] initWithURLTransformation:transformNOP];
+  return transform;
+}
+
++ (OIDCustomBrowserURLTransformation)
+    URLTransformationSchemeSubstitutionHTTPS:(NSString *)browserSchemeHTTPS
+                                        HTTP:(nullable NSString *)browserSchemeHTTP {
+  OIDCustomBrowserURLTransformation transform = ^NSURL *(NSURL *requestURL) {
+    // Replace the URL Scheme with the Chrome equivalent.
+    NSString *newScheme = nil;
+    if ([requestURL.scheme isEqualToString:@"https"]) {
+      newScheme = browserSchemeHTTPS;
+    } else if ([requestURL.scheme isEqualToString:@"http"]) {
+      if (!browserSchemeHTTP) {
+        NSAssert(false, @"No HTTP scheme registered for browser");
+        return nil;
+      }
+      newScheme = browserSchemeHTTP;
+    }
+     
+    // Replaces the URI scheme with the custom scheme
+    NSURLComponents *components = [NSURLComponents componentsWithURL:requestURL
+                                             resolvingAgainstBaseURL:YES];
+    components.scheme = newScheme;
+    return components.URL;
+  };
+  return transform;
+}
+
++ (OIDCustomBrowserURLTransformation)URLTransformationSchemeConcatPrefix:(NSString *)URLprefix {
+  OIDCustomBrowserURLTransformation transform = ^NSURL *(NSURL *requestURL) {
+    NSString *requestURLString = [requestURL absoluteString];
+    NSMutableCharacterSet *allowedParamCharacters =
+        [OIDURLQueryComponent URLParamValueAllowedCharacters];
+    NSString *encodedUrl = [requestURLString stringByAddingPercentEncodingWithAllowedCharacters:allowedParamCharacters];
+    NSString *newURL = [NSString stringWithFormat:@"%@%@", URLprefix, encodedUrl];
+    return [NSURL URLWithString:newURL];
+  };
+  return transform;
+}
+
+- (nullable instancetype)initWithURLTransformation:
+    (OIDCustomBrowserURLTransformation)URLTransformation {
+  return [self initWithURLTransformation:URLTransformation canOpenURLScheme:nil appStoreURL:nil];
+}
+
+- (nullable instancetype)
+    initWithURLTransformation:(OIDCustomBrowserURLTransformation)URLTransformation
+             canOpenURLScheme:(nullable NSString *)canOpenURLScheme
+                  appStoreURL:(nullable NSURL *)appStoreURL {
+  self = [super init];
+  if (self) {
+    _URLTransformation = URLTransformation;
+    _canOpenURLScheme = canOpenURLScheme;
+    _appStoreURL = appStoreURL;
+  }
+  return self;
+}
+
+- (BOOL)presentExternalUserAgentRequest:(nonnull id<OIDExternalUserAgentRequest>)request
+                                session:(nonnull id<OIDExternalUserAgentSession>)session {
+  // If the app store URL is set, checks if the app is installed and if not opens the app store.
+  if (_appStoreURL && _canOpenURLScheme) {
+    // Verifies existence of LSApplicationQueriesSchemes Info.plist key.
+    NSArray __unused* canOpenURLs =
+        [[NSBundle mainBundle] objectForInfoDictionaryKey:@"LSApplicationQueriesSchemes"];
+    NSAssert(canOpenURLs, @"plist missing LSApplicationQueriesSchemes key");
+    NSAssert1([canOpenURLs containsObject:_canOpenURLScheme],
+              @"plist missing LSApplicationQueriesSchemes entry for '%@'", _canOpenURLScheme);
+
+    // Opens AppStore if app isn't installed
+    NSString *testURLString = [NSString stringWithFormat:@"%@://example.com", _canOpenURLScheme];
+    NSURL *testURL = [NSURL URLWithString:testURLString];
+    if (![[UIApplication sharedApplication] canOpenURL:testURL]) {
+      [[UIApplication sharedApplication] openURL:_appStoreURL];
+      return NO;
+    }
+  }
+  
+  // Transforms the request URL and opens it.
+  NSURL *requestURL = [request externalUserAgentRequestURL];
+  requestURL = _URLTransformation(requestURL);
+  BOOL openedInBrowser = [[UIApplication sharedApplication] openURL:requestURL];
+  return openedInBrowser;
+}
+
+- (void)dismissExternalUserAgentAnimated:(BOOL)animated
+                                completion:(nonnull void (^)(void))completion {
+  completion();
+}
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif // !TARGET_OS_MACCATALYST
+
+#endif // TARGET_OS_IOS || TARGET_OS_MACCATALYST

Pods/AppAuth/Source/AppAuthCore.h

@@ -0,0 +1,44 @@
+/*! @file AppAuthCore.h
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2015 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import "OIDAuthState.h"
+#import "OIDAuthStateChangeDelegate.h"
+#import "OIDAuthStateErrorDelegate.h"
+#import "OIDAuthorizationRequest.h"
+#import "OIDAuthorizationResponse.h"
+#import "OIDAuthorizationService.h"
+#import "OIDError.h"
+#import "OIDErrorUtilities.h"
+#import "OIDExternalUserAgent.h"
+#import "OIDExternalUserAgentRequest.h"
+#import "OIDExternalUserAgentSession.h"
+#import "OIDGrantTypes.h"
+#import "OIDIDToken.h"
+#import "OIDRegistrationRequest.h"
+#import "OIDRegistrationResponse.h"
+#import "OIDResponseTypes.h"
+#import "OIDScopes.h"
+#import "OIDScopeUtilities.h"
+#import "OIDServiceConfiguration.h"
+#import "OIDServiceDiscovery.h"
+#import "OIDTokenRequest.h"
+#import "OIDTokenResponse.h"
+#import "OIDTokenUtilities.h"
+#import "OIDURLSessionProvider.h"
+#import "OIDEndSessionRequest.h"
+#import "OIDEndSessionResponse.h"

Pods/AppAuth/Source/AppAuthCore/OIDAuthState.h

@@ -0,0 +1,272 @@
+/*! @file OIDAuthState.h
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2015 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+#import <Foundation/Foundation.h>
+
+@class OIDAuthorizationRequest;
+@class OIDAuthorizationResponse;
+@class OIDAuthState;
+@class OIDRegistrationResponse;
+@class OIDTokenResponse;
+@class OIDTokenRequest;
+@protocol OIDAuthStateChangeDelegate;
+@protocol OIDAuthStateErrorDelegate;
+@protocol OIDExternalUserAgent;
+@protocol OIDExternalUserAgentSession;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/*! @brief Represents a block used to call an action with a fresh access token.
+    @param accessToken A valid access token if available.
+    @param idToken A valid ID token if available.
+    @param error The error if an error occurred.
+ */
+typedef void (^OIDAuthStateAction)(NSString *_Nullable accessToken,
+                                   NSString *_Nullable idToken,
+                                   NSError *_Nullable error);
+
+/*! @brief The method called when the @c
+        OIDAuthState.authStateByPresentingAuthorizationRequest:presentingViewController:callback:
+        method has completed or failed.
+    @param authState The auth state, if the authorization request succeeded.
+    @param error The error if an error occurred.
+ */
+typedef void (^OIDAuthStateAuthorizationCallback)(OIDAuthState *_Nullable authState,
+                                                  NSError *_Nullable error);
+
+/*! @brief A convenience class that retains the auth state between @c OIDAuthorizationResponse%s
+        and @c OIDTokenResponse%s.
+ */
+@interface OIDAuthState : NSObject <NSSecureCoding>
+
+/*! @brief The most recent refresh token received from the server.
+    @discussion Rather than using this property directly, you should call
+        @c OIDAuthState.performActionWithFreshTokens:.
+    @remarks refresh_token
+    @see https://tools.ietf.org/html/rfc6749#section-5.1
+ */
+@property(nonatomic, readonly, nullable) NSString *refreshToken;
+
+/*! @brief The scope of the current authorization grant.
+    @discussion This represents the latest scope returned by the server and may be a subset of the
+        scope that was initially granted.
+    @remarks scope
+ */
+@property(nonatomic, readonly, nullable) NSString *scope;
+
+/*! @brief The most recent authorization response used to update the authorization state. For the
+        implicit flow, this will contain the latest access token.
+ */
+@property(nonatomic, readonly) OIDAuthorizationResponse *lastAuthorizationResponse;
+
+/*! @brief The most recent token response used to update this authorization state. This will
+        contain the latest access token.
+ */
+@property(nonatomic, readonly, nullable) OIDTokenResponse *lastTokenResponse;
+
+/*! @brief The most recent registration response used to update this authorization state. This will
+        contain the latest client credentials.
+ */
+@property(nonatomic, readonly, nullable) OIDRegistrationResponse *lastRegistrationResponse;
+
+/*! @brief The authorization error that invalidated this @c OIDAuthState.
+    @discussion The authorization error encountered by @c OIDAuthState or set by the user via
+        @c OIDAuthState.updateWithAuthorizationError: that invalidated this @c OIDAuthState.
+        Authorization errors from @c OIDAuthState will always have a domain of
+        @c ::OIDOAuthAuthorizationErrorDomain or @c ::OIDOAuthTokenErrorDomain. Note: that after
+        unarchiving the @c OIDAuthState object, the \NSError_userInfo property of this error will
+        be nil.
+ */
+@property(nonatomic, readonly, nullable) NSError *authorizationError;
+
+/*! @brief Returns YES if the authorization state is not known to be invalid.
+    @discussion Returns YES if no OAuth errors have been received, and the last call resulted in a
+        successful access token or id token. This does not mean that the access is fresh - just
+        that it was valid the last time it was used. Note that network and other transient errors
+        do not invalidate the authorized state.  If NO, you should authenticate the user again,
+        using a fresh authorization request. Invalid @c OIDAuthState objects may still be useful in
+        that case, to hint at the previously authorized user and streamline the re-authentication
+        experience.
+ */
+@property(nonatomic, readonly) BOOL isAuthorized;
+
+/*! @brief The @c OIDAuthStateChangeDelegate delegate.
+    @discussion Use the delegate to observe state changes (and update storage) as well as error
+        states.
+ */
+@property(nonatomic, weak, nullable) id<OIDAuthStateChangeDelegate> stateChangeDelegate;
+
+/*! @brief The @c OIDAuthStateErrorDelegate delegate.
+    @discussion Use the delegate to observe state changes (and update storage) as well as error
+        states.
+ */
+@property(nonatomic, weak, nullable) id<OIDAuthStateErrorDelegate> errorDelegate;
+
+/*! @brief Convenience method to create a @c OIDAuthState by presenting an authorization request
+        and performing the authorization code exchange in the case of code flow requests. For
+        the hybrid flow, the caller should validate the id_token and c_hash, then perform the token
+        request (@c OIDAuthorizationService.performTokenRequest:callback:)
+        and update the OIDAuthState with the results (@c
+        OIDAuthState.updateWithTokenResponse:error:).
+    @param authorizationRequest The authorization request to present.
+    @param externalUserAgent A external user agent that can present an external user-agent request.
+    @param callback The method called when the request has completed or failed.
+    @return A @c OIDExternalUserAgentSession instance which will terminate when it
+        receives a @c OIDExternalUserAgentSession.cancel message, or after processing a
+        @c OIDExternalUserAgentSession.resumeExternalUserAgentFlowWithURL: message.
+ */
++ (id<OIDExternalUserAgentSession>)
+    authStateByPresentingAuthorizationRequest:(OIDAuthorizationRequest *)authorizationRequest
+                            externalUserAgent:(id<OIDExternalUserAgent>)externalUserAgent
+                                     callback:(OIDAuthStateAuthorizationCallback)callback;
+
+/*! @internal
+    @brief Unavailable. Please use @c initWithAuthorizationResponse:.
+ */
+- (instancetype)init NS_UNAVAILABLE;
+
+/*! @brief Creates an auth state from an authorization response.
+    @param authorizationResponse The authorization response.
+ */
+- (instancetype)initWithAuthorizationResponse:(OIDAuthorizationResponse *)authorizationResponse;
+
+/*! @brief Creates an auth state from an authorization and token response.
+    @param authorizationResponse The authorization response.
+    @param tokenResponse The token response.
+ */
+- (instancetype)initWithAuthorizationResponse:(OIDAuthorizationResponse *)authorizationResponse
+                                tokenResponse:(nullable OIDTokenResponse *)tokenResponse;
+
+/*! @brief Creates an auth state from an registration response.
+    @param registrationResponse The registration response.
+ */
+- (instancetype)initWithRegistrationResponse:(OIDRegistrationResponse *)registrationResponse;
+
+/*! @brief Creates an auth state from an authorization, token and registration response.
+    @param authorizationResponse The authorization response.
+    @param tokenResponse The token response.
+    @param registrationResponse The registration response.
+ */
+- (instancetype)initWithAuthorizationResponse:
+    (nullable OIDAuthorizationResponse *)authorizationResponse
+           tokenResponse:(nullable OIDTokenResponse *)tokenResponse
+    registrationResponse:(nullable OIDRegistrationResponse *)registrationResponse
+    NS_DESIGNATED_INITIALIZER;
+
+/*! @brief Updates the authorization state based on a new authorization response.
+    @param authorizationResponse The new authorization response to update the state with.
+    @param error Any error encountered when performing the authorization request. Errors in the
+        domain @c ::OIDOAuthAuthorizationErrorDomain are reflected in the auth state, other errors
+        are assumed to be transient, and ignored.
+    @discussion Typically called with the response from an incremental authorization request,
+        or if using the implicit flow. Will clear the @c #lastTokenResponse property.
+ */
+- (void)updateWithAuthorizationResponse:(nullable OIDAuthorizationResponse *)authorizationResponse
+                                  error:(nullable NSError *)error;
+
+/*! @brief Updates the authorization state based on a new token response.
+    @param tokenResponse The new token response to update the state from.
+    @param error Any error encountered when performing the authorization request. Errors in the
+        domain @c ::OIDOAuthTokenErrorDomain are reflected in the auth state, other errors
+        are assumed to be transient, and ignored.
+    @discussion Typically called with the response from an authorization code exchange, or a token
+        refresh.
+ */
+- (void)updateWithTokenResponse:(nullable OIDTokenResponse *)tokenResponse
+                          error:(nullable NSError *)error;
+
+/*! @brief Updates the authorization state based on a new registration response.
+    @param registrationResponse The new registration response to update the state with.
+    @discussion Typically called with the response from a successful client registration
+        request. Will reset the auth state.
+ */
+- (void)updateWithRegistrationResponse:(nullable OIDRegistrationResponse *)registrationResponse;
+
+/*! @brief Updates the authorization state based on an authorization error.
+    @param authorizationError The authorization error.
+    @discussion Call this method if you receive an authorization error during an API call to
+        invalidate the authentication state of this @c OIDAuthState. Don't call with errors
+        unrelated to authorization, such as transient network errors.
+        The OIDAuthStateErrorDelegate.authState:didEncounterAuthorizationError: method of
+        @c #errorDelegate will be called with the error.
+        You may optionally use the convenience method
+        OIDErrorUtilities.resourceServerAuthorizationErrorWithCode:errorResponse:underlyingError:
+        to create \NSError objects for use here.
+        The latest error received is stored in @c #authorizationError. Note: that after unarchiving
+        this object, the \NSError_userInfo property of this error will be nil.
+ */
+- (void)updateWithAuthorizationError:(NSError *)authorizationError;
+
+/*! @brief Calls the block with a valid access token (refreshing it first, if needed), or if a
+        refresh was needed and failed, with the error that caused it to fail.
+    @param action The block to execute with a fresh token. This block will be executed on the main
+        thread.
+ */
+- (void)performActionWithFreshTokens:(OIDAuthStateAction)action;
+
+/*! @brief Calls the block with a valid access token (refreshing it first, if needed), or if a
+        refresh was needed and failed, with the error that caused it to fail.
+    @param action The block to execute with a fresh token. This block will be executed on the main
+        thread.
+    @param additionalParameters Additional parameters for the token request if token is
+        refreshed.
+ */
+- (void)performActionWithFreshTokens:(OIDAuthStateAction)action
+         additionalRefreshParameters:
+    (nullable NSDictionary<NSString *, NSString *> *)additionalParameters;
+
+/*! @brief Calls the block with a valid access token (refreshing it first, if needed), or if a
+        refresh was needed and failed, with the error that caused it to fail.
+    @param action The block to execute with a fresh token. This block will be executed on the main
+        thread.
+    @param additionalParameters Additional parameters for the token request if token is
+        refreshed.
+    @param dispatchQueue The dispatchQueue on which to dispatch the action block.
+ */
+- (void)performActionWithFreshTokens:(OIDAuthStateAction)action
+         additionalRefreshParameters:
+    (nullable NSDictionary<NSString *, NSString *> *)additionalParameters
+                       dispatchQueue:(dispatch_queue_t)dispatchQueue;
+
+/*! @brief Forces a token refresh the next time @c OIDAuthState.performActionWithFreshTokens: is
+        called, even if the current tokens are considered valid.
+ */
+- (void)setNeedsTokenRefresh;
+
+/*! @brief Creates a token request suitable for refreshing an access token.
+    @return A @c OIDTokenRequest suitable for using a refresh token to obtain a new access token.
+    @discussion After performing the refresh, call @c OIDAuthState.updateWithTokenResponse:error:
+        to update the authorization state based on the response. Rather than doing the token refresh
+        yourself, you should use @c OIDAuthState.performActionWithFreshTokens:.
+    @see https://tools.ietf.org/html/rfc6749#section-1.5
+ */
+- (nullable OIDTokenRequest *)tokenRefreshRequest;
+
+/*! @brief Creates a token request suitable for refreshing an access token.
+    @param additionalParameters Additional parameters for the token request.
+    @return A @c OIDTokenRequest suitable for using a refresh token to obtain a new access token.
+    @discussion After performing the refresh, call @c OIDAuthState.updateWithTokenResponse:error:
+        to update the authorization state based on the response. Rather than doing the token refresh
+        yourself, you should use @c OIDAuthState.performActionWithFreshTokens:.
+    @see https://tools.ietf.org/html/rfc6749#section-1.5
+ */
+- (nullable OIDTokenRequest *)tokenRefreshRequestWithAdditionalParameters:
+    (nullable NSDictionary<NSString *, NSString *> *)additionalParameters;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/AppAuth/Source/AppAuthCore/OIDAuthState.m

@@ -0,0 +1,570 @@
+/*! @file OIDAuthState.m
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2015 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import "OIDAuthState.h"
+
+#import "OIDAuthStateChangeDelegate.h"
+#import "OIDAuthStateErrorDelegate.h"
+#import "OIDAuthorizationRequest.h"
+#import "OIDAuthorizationResponse.h"
+#import "OIDAuthorizationService.h"
+#import "OIDDefines.h"
+#import "OIDError.h"
+#import "OIDErrorUtilities.h"
+#import "OIDRegistrationResponse.h"
+#import "OIDTokenRequest.h"
+#import "OIDTokenResponse.h"
+#import "OIDTokenUtilities.h"
+
+/*! @brief Key used to encode the @c refreshToken property for @c NSSecureCoding.
+ */
+static NSString *const kRefreshTokenKey = @"refreshToken";
+
+/*! @brief Key used to encode the @c needsTokenRefresh property for @c NSSecureCoding.
+ */
+static NSString *const kNeedsTokenRefreshKey = @"needsTokenRefresh";
+
+/*! @brief Key used to encode the @c scope property for @c NSSecureCoding.
+ */
+static NSString *const kScopeKey = @"scope";
+
+/*! @brief Key used to encode the @c lastAuthorizationResponse property for @c NSSecureCoding.
+ */
+static NSString *const kLastAuthorizationResponseKey = @"lastAuthorizationResponse";
+
+/*! @brief Key used to encode the @c lastTokenResponse property for @c NSSecureCoding.
+ */
+static NSString *const kLastTokenResponseKey = @"lastTokenResponse";
+
+/*! @brief Key used to encode the @c lastOAuthError property for @c NSSecureCoding.
+ */
+static NSString *const kAuthorizationErrorKey = @"authorizationError";
+
+/*! @brief The exception thrown when a developer tries to create a refresh request from an
+        authorization request with no authorization code.
+ */
+static NSString *const kRefreshTokenRequestException =
+    @"Attempted to create a token refresh request from a token response with no refresh token.";
+
+/*! @brief Number of seconds the access token is refreshed before it actually expires.
+ */
+static const NSUInteger kExpiryTimeTolerance = 60;
+
+/*! @brief Object to hold OIDAuthState pending actions.
+ */
+@interface OIDAuthStatePendingAction : NSObject
+@property(nonatomic, readonly, nullable) OIDAuthStateAction action;
+@property(nonatomic, readonly, nullable) dispatch_queue_t dispatchQueue;
+@end
+@implementation OIDAuthStatePendingAction
+- (id)initWithAction:(OIDAuthStateAction)action andDispatchQueue:(dispatch_queue_t)dispatchQueue {
+  self = [super init];
+  if (self) {
+    _action = action;
+    _dispatchQueue = dispatchQueue;
+  }
+  return self;
+}
+@end
+
+@interface OIDAuthState ()
+
+/*! @brief The access token generated by the authorization server.
+    @discussion Rather than using this property directly, you should call
+        @c OIDAuthState.withFreshTokenPerformAction:.
+ */
+@property(nonatomic, readonly, nullable) NSString *accessToken;
+
+/*! @brief The approximate expiration date & time of the access token.
+    @discussion Rather than using this property directly, you should call
+        @c OIDAuthState.withFreshTokenPerformAction:.
+ */
+@property(nonatomic, readonly, nullable) NSDate *accessTokenExpirationDate;
+
+/*! @brief ID Token value associated with the authenticated session.
+    @discussion Rather than using this property directly, you should call
+        OIDAuthState.withFreshTokenPerformAction:.
+ */
+@property(nonatomic, readonly, nullable) NSString *idToken;
+
+/*! @brief Private method, called when the internal state changes.
+ */
+- (void)didChangeState;
+
+@end
+
+
+@implementation OIDAuthState {
+  /*! @brief Array of pending actions (use @c _pendingActionsSyncObject to synchronize access).
+   */
+  NSMutableArray *_pendingActions;
+
+  /*! @brief Object for synchronizing access to @c pendingActions.
+   */
+  id _pendingActionsSyncObject;
+
+  /*! @brief If YES, tokens will be refreshed on the next API call regardless of expiry.
+   */
+  BOOL _needsTokenRefresh;
+}
+
+#pragma mark - Convenience initializers
+
++ (id<OIDExternalUserAgentSession>)
+    authStateByPresentingAuthorizationRequest:(OIDAuthorizationRequest *)authorizationRequest
+                            externalUserAgent:(id<OIDExternalUserAgent>)externalUserAgent
+                                     callback:(OIDAuthStateAuthorizationCallback)callback {
+  // presents the authorization request
+  id<OIDExternalUserAgentSession> authFlowSession = [OIDAuthorizationService
+      presentAuthorizationRequest:authorizationRequest
+                externalUserAgent:externalUserAgent
+                         callback:^(OIDAuthorizationResponse *_Nullable authorizationResponse,
+                                    NSError *_Nullable authorizationError) {
+                           // inspects response and processes further if needed (e.g. authorization
+                           // code exchange)
+                           if (authorizationResponse) {
+                             if ([authorizationRequest.responseType
+                                     isEqualToString:OIDResponseTypeCode]) {
+                               // if the request is for the code flow (NB. not hybrid), assumes the
+                               // code is intended for this client, and performs the authorization
+                               // code exchange
+                               OIDTokenRequest *tokenExchangeRequest =
+                                   [authorizationResponse tokenExchangeRequest];
+                               [OIDAuthorizationService performTokenRequest:tokenExchangeRequest
+                                              originalAuthorizationResponse:authorizationResponse
+                                   callback:^(OIDTokenResponse *_Nullable tokenResponse,
+                                                         NSError *_Nullable tokenError) {
+                                                OIDAuthState *authState;
+                                                if (tokenResponse) {
+                                                  authState = [[OIDAuthState alloc]
+                                                      initWithAuthorizationResponse:
+                                                          authorizationResponse
+                                                                      tokenResponse:tokenResponse];
+                                                }
+                                                callback(authState, tokenError);
+                               }];
+                             } else {
+                               // hybrid flow (code id_token). Two possible cases:
+                               // 1. The code is not for this client, ie. will be sent to a
+                               //    webservice that performs the id token verification and token
+                               //    exchange
+                               // 2. The code is for this client and, for security reasons, the
+                               //    application developer must verify the id_token signature and
+                               //    c_hash before calling the token endpoint
+                               OIDAuthState *authState = [[OIDAuthState alloc]
+                                   initWithAuthorizationResponse:authorizationResponse];
+                               callback(authState, authorizationError);
+                             }
+                           } else {
+                             callback(nil, authorizationError);
+                           }
+                         }];
+  return authFlowSession;
+}
+
+#pragma mark - Initializers
+
+- (nonnull instancetype)init
+    OID_UNAVAILABLE_USE_INITIALIZER(@selector(initWithAuthorizationResponse:tokenResponse:))
+
+/*! @brief Creates an auth state from an authorization response.
+    @param authorizationResponse The authorization response.
+ */
+- (instancetype)initWithAuthorizationResponse:(OIDAuthorizationResponse *)authorizationResponse {
+  return [self initWithAuthorizationResponse:authorizationResponse tokenResponse:nil];
+}
+
+
+/*! @brief Designated initializer.
+    @param authorizationResponse The authorization response.
+    @discussion Creates an auth state from an authorization response and token response.
+ */
+- (instancetype)initWithAuthorizationResponse:(OIDAuthorizationResponse *)authorizationResponse
+                                         tokenResponse:(nullable OIDTokenResponse *)tokenResponse {
+  return [self initWithAuthorizationResponse:authorizationResponse
+                               tokenResponse:tokenResponse
+                        registrationResponse:nil];
+}
+
+/*! @brief Creates an auth state from an registration response.
+    @param registrationResponse The registration response.
+ */
+- (instancetype)initWithRegistrationResponse:(OIDRegistrationResponse *)registrationResponse {
+  return [self initWithAuthorizationResponse:nil
+                               tokenResponse:nil
+                        registrationResponse:registrationResponse];
+}
+
+- (instancetype)initWithAuthorizationResponse:
+    (nullable OIDAuthorizationResponse *)authorizationResponse
+           tokenResponse:(nullable OIDTokenResponse *)tokenResponse
+    registrationResponse:(nullable OIDRegistrationResponse *)registrationResponse {
+  self = [super init];
+  if (self) {
+    _pendingActionsSyncObject = [[NSObject alloc] init];
+
+    if (registrationResponse) {
+      [self updateWithRegistrationResponse:registrationResponse];
+    }
+
+    if (authorizationResponse) {
+      [self updateWithAuthorizationResponse:authorizationResponse error:nil];
+    }
+
+    if (tokenResponse) {
+      [self updateWithTokenResponse:tokenResponse error:nil];
+    }
+  }
+  return self;
+}
+
+#pragma mark - NSObject overrides
+
+- (NSString *)description {
+  return [NSString stringWithFormat:@"<%@: %p, isAuthorized: %@, refreshToken: \"%@\", "
+                                     "scope: \"%@\", accessToken: \"%@\", "
+                                     "accessTokenExpirationDate: %@, idToken: \"%@\", "
+                                     "lastAuthorizationResponse: %@, lastTokenResponse: %@, "
+                                     "lastRegistrationResponse: %@, authorizationError: %@>",
+                                    NSStringFromClass([self class]),
+                                    (void *)self,
+                                    (self.isAuthorized) ? @"YES" : @"NO",
+                                    [OIDTokenUtilities redact:_refreshToken],
+                                    _scope,
+                                    [OIDTokenUtilities redact:self.accessToken],
+                                    self.accessTokenExpirationDate,
+                                    [OIDTokenUtilities redact:self.idToken],
+                                    _lastAuthorizationResponse,
+                                    _lastTokenResponse,
+                                    _lastRegistrationResponse,
+                                    _authorizationError];
+}
+
+#pragma mark - NSSecureCoding
+
++ (BOOL)supportsSecureCoding {
+  return YES;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
+  _lastAuthorizationResponse = [aDecoder decodeObjectOfClass:[OIDAuthorizationResponse class]
+                                                      forKey:kLastAuthorizationResponseKey];
+  _lastTokenResponse = [aDecoder decodeObjectOfClass:[OIDTokenResponse class]
+                                              forKey:kLastTokenResponseKey];
+  self = [self initWithAuthorizationResponse:_lastAuthorizationResponse
+                               tokenResponse:_lastTokenResponse];
+  if (self) {
+    _authorizationError =
+        [aDecoder decodeObjectOfClass:[NSError class] forKey:kAuthorizationErrorKey];
+    _scope = [aDecoder decodeObjectOfClass:[NSString class] forKey:kScopeKey];
+    _refreshToken = [aDecoder decodeObjectOfClass:[NSString class] forKey:kRefreshTokenKey];
+    _needsTokenRefresh = [aDecoder decodeBoolForKey:kNeedsTokenRefreshKey];
+  }
+  return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)aCoder {
+  [aCoder encodeObject:_lastAuthorizationResponse forKey:kLastAuthorizationResponseKey];
+  [aCoder encodeObject:_lastTokenResponse forKey:kLastTokenResponseKey];
+  if (_authorizationError) {
+    NSError *codingSafeAuthorizationError = [NSError errorWithDomain:_authorizationError.domain
+                                                                code:_authorizationError.code
+                                                            userInfo:nil];
+    [aCoder encodeObject:codingSafeAuthorizationError forKey:kAuthorizationErrorKey];
+  }
+  [aCoder encodeObject:_scope forKey:kScopeKey];
+  [aCoder encodeObject:_refreshToken forKey:kRefreshTokenKey];
+  [aCoder encodeBool:_needsTokenRefresh forKey:kNeedsTokenRefreshKey];
+}
+
+#pragma mark - Private convenience getters
+
+- (NSString *)accessToken {
+  if (_authorizationError) {
+    return nil;
+  }
+  return _lastTokenResponse ? _lastTokenResponse.accessToken
+                            : _lastAuthorizationResponse.accessToken;
+}
+
+- (NSString *)tokenType {
+  if (_authorizationError) {
+    return nil;
+  }
+  return _lastTokenResponse ? _lastTokenResponse.tokenType
+                            : _lastAuthorizationResponse.tokenType;
+}
+
+- (NSDate *)accessTokenExpirationDate {
+  if (_authorizationError) {
+    return nil;
+  }
+  return _lastTokenResponse ? _lastTokenResponse.accessTokenExpirationDate
+                            : _lastAuthorizationResponse.accessTokenExpirationDate;
+}
+
+- (NSString *)idToken {
+  if (_authorizationError) {
+    return nil;
+  }
+  return _lastTokenResponse ? _lastTokenResponse.idToken
+                            : _lastAuthorizationResponse.idToken;
+}
+
+#pragma mark - Getters
+
+- (BOOL)isAuthorized {
+  return !self.authorizationError && (self.accessToken || self.idToken || self.refreshToken);
+}
+
+#pragma mark - Updating the state
+
+- (void)updateWithRegistrationResponse:(OIDRegistrationResponse *)registrationResponse {
+  _lastRegistrationResponse = registrationResponse;
+  _refreshToken = nil;
+  _scope = nil;
+  _lastAuthorizationResponse = nil;
+  _lastTokenResponse = nil;
+  _authorizationError = nil;
+  [self didChangeState];
+}
+
+- (void)updateWithAuthorizationResponse:(nullable OIDAuthorizationResponse *)authorizationResponse
+                                  error:(nullable NSError *)error {
+  // If the error is an OAuth authorization error, updates the state. Other errors are ignored.
+  if (error.domain == OIDOAuthAuthorizationErrorDomain) {
+    [self updateWithAuthorizationError:error];
+    return;
+  }
+  if (!authorizationResponse) {
+    return;
+  }
+
+  _lastAuthorizationResponse = authorizationResponse;
+
+  // clears the last token response and refresh token as these now relate to an old authorization
+  // that is no longer relevant
+  _lastTokenResponse = nil;
+  _refreshToken = nil;
+  _authorizationError = nil;
+
+  // if the response's scope is nil, it means that it equals that of the request
+  // see: https://tools.ietf.org/html/rfc6749#section-5.1
+  _scope = (authorizationResponse.scope) ? authorizationResponse.scope
+                                         : authorizationResponse.request.scope;
+
+  [self didChangeState];
+}
+
+- (void)updateWithTokenResponse:(nullable OIDTokenResponse *)tokenResponse
+                          error:(nullable NSError *)error {
+  if (_authorizationError) {
+    // Calling updateWithTokenResponse while in an error state probably means the developer obtained
+    // a new token and did the exchange without also calling updateWithAuthorizationResponse.
+    // Attempts to handle gracefully, but warns the developer that this is unexpected.
+    NSLog(@"OIDAuthState:updateWithTokenResponse should not be called in an error state [%@] call"
+         "updateWithAuthorizationResponse with the result of the fresh authorization response"
+         "first",
+         _authorizationError);
+
+    _authorizationError = nil;
+  }
+
+  // If the error is an OAuth authorization error, updates the state. Other errors are ignored.
+  if (error.domain == OIDOAuthTokenErrorDomain) {
+    [self updateWithAuthorizationError:error];
+    return;
+  }
+  if (!tokenResponse) {
+    return;
+  }
+
+  _lastTokenResponse = tokenResponse;
+
+  // updates the scope and refresh token if they are present on the TokenResponse.
+  // according to the spec, these may be changed by the server, including when refreshing the
+  // access token. See: https://tools.ietf.org/html/rfc6749#section-5.1 and
+  // https://tools.ietf.org/html/rfc6749#section-6
+  if (tokenResponse.scope) {
+    _scope = tokenResponse.scope;
+  }
+  if (tokenResponse.refreshToken) {
+    _refreshToken = tokenResponse.refreshToken;
+  }
+
+  [self didChangeState];
+}
+
+- (void)updateWithAuthorizationError:(NSError *)oauthError {
+  _authorizationError = oauthError;
+
+  [self didChangeState];
+
+  [_errorDelegate authState:self didEncounterAuthorizationError:oauthError];
+}
+
+#pragma mark - OAuth Requests
+
+- (OIDTokenRequest *)tokenRefreshRequest {
+  return [self tokenRefreshRequestWithAdditionalParameters:nil];
+}
+
+- (OIDTokenRequest *)tokenRefreshRequestWithAdditionalParameters:
+    (NSDictionary<NSString *, NSString *> *)additionalParameters {
+
+  // TODO: Add unit test to confirm exception is thrown when expected
+
+  if (!_refreshToken) {
+    [OIDErrorUtilities raiseException:kRefreshTokenRequestException];
+  }
+  return [[OIDTokenRequest alloc]
+      initWithConfiguration:_lastAuthorizationResponse.request.configuration
+                  grantType:OIDGrantTypeRefreshToken
+          authorizationCode:nil
+                redirectURL:nil
+                   clientID:_lastAuthorizationResponse.request.clientID
+               clientSecret:_lastAuthorizationResponse.request.clientSecret
+                      scope:nil
+               refreshToken:_refreshToken
+               codeVerifier:nil
+       additionalParameters:additionalParameters];
+}
+
+#pragma mark - Stateful Actions
+
+- (void)didChangeState {
+  [_stateChangeDelegate didChangeState:self];
+}
+
+- (void)setNeedsTokenRefresh {
+  _needsTokenRefresh = YES;
+}
+
+- (void)performActionWithFreshTokens:(OIDAuthStateAction)action {
+  [self performActionWithFreshTokens:action additionalRefreshParameters:nil];
+}
+
+- (void)performActionWithFreshTokens:(OIDAuthStateAction)action
+         additionalRefreshParameters:
+    (nullable NSDictionary<NSString *, NSString *> *)additionalParameters {
+  [self performActionWithFreshTokens:action
+         additionalRefreshParameters:additionalParameters
+                       dispatchQueue:dispatch_get_main_queue()];
+}
+
+- (void)performActionWithFreshTokens:(OIDAuthStateAction)action
+         additionalRefreshParameters:
+    (nullable NSDictionary<NSString *, NSString *> *)additionalParameters
+                       dispatchQueue:(dispatch_queue_t)dispatchQueue {
+
+  if ([self isTokenFresh]) {
+    // access token is valid within tolerance levels, perform action
+    dispatch_async(dispatchQueue, ^{
+      action(self.accessToken, self.idToken, nil);
+    });
+    return;
+  }
+
+  if (!_refreshToken) {
+    // no refresh token available and token has expired
+    NSError *tokenRefreshError = [
+      OIDErrorUtilities errorWithCode:OIDErrorCodeTokenRefreshError
+                      underlyingError:nil
+                          description:@"Unable to refresh expired token without a refresh token."];
+    dispatch_async(dispatchQueue, ^{
+        action(nil, nil, tokenRefreshError);
+    });
+    return;
+  }
+
+  // access token is expired, first refresh the token, then perform action
+  NSAssert(_pendingActionsSyncObject, @"_pendingActionsSyncObject cannot be nil", @"");
+  OIDAuthStatePendingAction* pendingAction =
+      [[OIDAuthStatePendingAction alloc] initWithAction:action andDispatchQueue:dispatchQueue];
+  @synchronized(_pendingActionsSyncObject) {
+    // if a token is already in the process of being refreshed, adds to pending actions
+    if (_pendingActions) {
+      [_pendingActions addObject:pendingAction];
+      return;
+    }
+
+    // creates a list of pending actions, starting with this one
+    _pendingActions = [NSMutableArray arrayWithObject:pendingAction];
+  }
+
+  // refresh the tokens
+  OIDTokenRequest *tokenRefreshRequest =
+      [self tokenRefreshRequestWithAdditionalParameters:additionalParameters];
+  [OIDAuthorizationService performTokenRequest:tokenRefreshRequest
+                 originalAuthorizationResponse:_lastAuthorizationResponse
+                                      callback:^(OIDTokenResponse *_Nullable response,
+                                                 NSError *_Nullable error) {
+    // update OIDAuthState based on response
+    if (response) {
+      self->_needsTokenRefresh = NO;
+      [self updateWithTokenResponse:response error:nil];
+    } else {
+      if (error.domain == OIDOAuthTokenErrorDomain) {
+        self->_needsTokenRefresh = NO;
+        [self updateWithAuthorizationError:error];
+      } else {
+        if ([self->_errorDelegate respondsToSelector:
+            @selector(authState:didEncounterTransientError:)]) {
+          [self->_errorDelegate authState:self didEncounterTransientError:error];
+        }
+      }
+    }
+
+    // nil the pending queue and process everything that was queued up
+    NSArray *actionsToProcess;
+    @synchronized(self->_pendingActionsSyncObject) {
+      actionsToProcess = self->_pendingActions;
+      self->_pendingActions = nil;
+    }
+    for (OIDAuthStatePendingAction* actionToProcess in actionsToProcess) {
+      dispatch_async(actionToProcess.dispatchQueue, ^{
+        actionToProcess.action(self.accessToken, self.idToken, error);
+      });
+    }
+  }];
+}
+
+#pragma mark -
+
+/*! @fn isTokenFresh
+    @brief Determines whether a token refresh request must be made to refresh the tokens.
+ */
+- (BOOL)isTokenFresh {
+  if (_needsTokenRefresh) {
+    // forced refresh
+    return NO;
+  }
+
+  if (!self.accessTokenExpirationDate) {
+    // if there is no expiration time but we have an access token, it is assumed to never expire
+    return !!self.accessToken;
+  }
+
+  // has the token expired?
+  BOOL tokenFresh = [self.accessTokenExpirationDate timeIntervalSinceNow] > kExpiryTimeTolerance;
+  return tokenFresh;
+}
+
+@end
+
+

Pods/AppAuth/Source/AppAuthCore/OIDAuthStateChangeDelegate.h

@@ -0,0 +1,39 @@
+/*! @file OIDAuthStateChangeDelegate.h
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2015 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@class OIDAuthState;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/*! @protocol OIDAuthStateChangeDelegate
+    @brief Delegate of the OIDAuthState used to monitor various changes in state.
+ */
+@protocol OIDAuthStateChangeDelegate <NSObject>
+
+/*! @brief Called when the authorization state changes and any backing storage needs to be updated.
+    @param state The @c OIDAuthState that changed.
+    @discussion If you are storing the authorization state, you should update the storage when the
+        state changes.
+ */
+- (void)didChangeState:(OIDAuthState *)state;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/AppAuth/Source/AppAuthCore/OIDAuthStateErrorDelegate.h

@@ -0,0 +1,62 @@
+/*! @file OIDAuthStateErrorDelegate.h
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2015 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@class OIDAuthState;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/*! @protocol OIDAuthStateErrorDelegate
+    @brief Delegate of the OIDAuthState used to monitor errors.
+ */
+@protocol OIDAuthStateErrorDelegate <NSObject>
+
+/*! @brief Called when an authentication occurs, which indicates the auth session is invalid.
+    @param state The @c OIDAuthState on which the error occurred.
+    @param error The authorization error.
+    @discussion This is a hard error (not a transient network issue) that indicates a problem with
+        the authorization. You should stop using the @c OIDAuthState when such an error is
+        encountered. If the \NSError_code is @c ::OIDErrorCodeOAuthInvalidGrant then
+        the session may be recoverable with user interaction (i.e. re-authentication). In all cases
+        you should consider the user unauthorized, and remove locally cached resources that require
+        that authorization.  @c OIDAuthState will call this method automatically if it encounters
+        an OAuth error (that is, an HTTP 400 response with a valid OAuth error response) during
+        authorization or token refresh (such as performed automatically when using
+        @c OIDAuthState.performActionWithFreshTokens:). You can signal authorization errors with
+        @c OIDAuthState.updateWithAuthorizationError:.
+    @see https://tools.ietf.org/html/rfc6749#section-5.2
+ */
+- (void)authState:(OIDAuthState *)state didEncounterAuthorizationError:(NSError *)error;
+
+@optional
+
+/*! @brief Called when a network or other transient error occurs.
+    @param state The @c OIDAuthState on which the error occurred.
+    @param error The transient error.
+    @discussion This is a soft error, typically network related. The @c OIDAuthState is likely
+        still valid, and should not be discarded. Retry the request using an incremental backoff
+        strategy. This is only called when using the @c OIDAuthState convenience methods such as
+        @c OIDAuthState.performActionWithFreshTokens:. If you are refreshing the tokens yourself
+        outside of @c OIDAuthState class, it will never be called.
+ */
+- (void)authState:(OIDAuthState *)state didEncounterTransientError:(NSError *)error;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/AppAuth/Source/AppAuthCore/OIDAuthorizationRequest.h

@@ -0,0 +1,250 @@
+/*! @file OIDAuthorizationRequest.h
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2015 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+// These files only declare string constants useful for constructing a @c OIDAuthorizationRequest,
+// so they are imported here for convenience.
+#import "OIDExternalUserAgentRequest.h"
+#import "OIDResponseTypes.h"
+#import "OIDScopes.h"
+
+@class OIDServiceConfiguration;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/*! @brief The @c code_challenge_method  value for the S256 code challenge.
+    @see https://tools.ietf.org/html/rfc7636#section-4.3
+ */
+extern NSString *const OIDOAuthorizationRequestCodeChallengeMethodS256;
+
+
+/*! @brief Represents an authorization request.
+    @see https://tools.ietf.org/html/rfc6749#section-4
+    @see https://tools.ietf.org/html/rfc6749#section-4.1.1
+ */
+@interface OIDAuthorizationRequest :
+    NSObject<NSCopying, NSSecureCoding, OIDExternalUserAgentRequest>
+
+/*! @brief The service's configuration.
+    @remarks This configuration specifies how to connect to a particular OAuth provider.
+        Configurations may be created manually, or via an OpenID Connect Discovery Document.
+ */
+@property(nonatomic, readonly) OIDServiceConfiguration *configuration;
+
+/*! @brief The expected response type.
+    @remarks response_type
+    @discussion Generally 'code' if pure OAuth, otherwise a space-delimited list of of response
+        types including 'code', 'token', and 'id_token' for OpenID Connect.
+    @see https://tools.ietf.org/html/rfc6749#section-3.1.1
+    @see http://openid.net/specs/openid-connect-core-1_0.html#rfc.section.3
+ */
+@property(nonatomic, readonly) NSString *responseType;
+
+/*! @brief The client identifier.
+    @remarks client_id
+    @see https://tools.ietf.org/html/rfc6749#section-2.2
+ */
+@property(nonatomic, readonly) NSString *clientID;
+
+/*! @brief The client secret.
+    @remarks client_secret
+    @discussion The client secret is used to prove that identity of the client when exchaning an
+        authorization code for an access token.
+        The client secret is not passed in the authorizationRequestURL. It is only used when
+        exchanging the authorization code for an access token.
+    @see https://tools.ietf.org/html/rfc6749#section-2.3.1
+ */
+@property(nonatomic, readonly, nullable) NSString *clientSecret;
+
+/*! @brief The value of the scope parameter is expressed as a list of space-delimited,
+        case-sensitive strings.
+    @remarks scope
+    @see https://tools.ietf.org/html/rfc6749#section-3.3
+ */
+@property(nonatomic, readonly, nullable) NSString *scope;
+
+/*! @brief The client's redirect URI.
+    @remarks redirect_uri
+    @see https://tools.ietf.org/html/rfc6749#section-3.1.2
+ */
+@property(nonatomic, readonly, nullable) NSURL *redirectURL;
+
+/*! @brief An opaque value used by the client to maintain state between the request and callback.
+    @remarks state
+    @discussion If this value is not explicitly set, this library will automatically add state and
+        perform appropriate validation of the state in the authorization response. It is recommended
+        that the default implementation of this parameter be used wherever possible. Typically used
+        to prevent CSRF attacks, as recommended in RFC6819 Section 5.3.5.
+    @see https://tools.ietf.org/html/rfc6749#section-4.1.1
+    @see https://tools.ietf.org/html/rfc6819#section-5.3.5
+ */
+@property(nonatomic, readonly, nullable) NSString *state;
+
+/*! @brief String value used to associate a Client session with an ID Token, and to mitigate replay
+        attacks. The value is passed through unmodified from the Authentication Request to the ID
+        Token. Sufficient entropy MUST be present in the nonce values used to prevent attackers from
+        guessing values.
+    @remarks nonce
+    @discussion If this value is not explicitly set, this library will automatically add nonce and
+        perform appropriate validation of the nonce in the ID Token.
+    @see https://openid.net/specs/openid-connect-core-1_0.html#AuthRequest
+ */
+@property(nonatomic, readonly, nullable) NSString *nonce;
+
+/*! @brief The PKCE code verifier.
+    @remarks code_verifier
+    @discussion The code verifier itself is not included in the authorization request that is sent
+        on the wire, but needs to be in the token exchange request.
+        @c OIDAuthorizationResponse.tokenExchangeRequest will create a @c OIDTokenRequest that
+        includes this parameter automatically.
+    @see https://tools.ietf.org/html/rfc7636#section-4.1
+ */
+@property(nonatomic, readonly, nullable) NSString *codeVerifier;
+
+/*! @brief The PKCE code challenge, derived from #codeVerifier.
+    @remarks code_challenge
+    @see https://tools.ietf.org/html/rfc7636#section-4.2
+ */
+@property(nonatomic, readonly, nullable) NSString *codeChallenge;
+
+/*! @brief The method used to compute the @c #codeChallenge
+    @remarks code_challenge_method
+    @see https://tools.ietf.org/html/rfc7636#section-4.3
+ */
+@property(nonatomic, readonly, nullable) NSString *codeChallengeMethod;
+
+/*! @brief The client's additional authorization parameters.
+    @see https://tools.ietf.org/html/rfc6749#section-3.1
+ */
+@property(nonatomic, readonly, nullable) NSDictionary<NSString *, NSString *> *additionalParameters;
+
+/*! @internal
+    @brief Unavailable. Please use
+        @c initWithConfiguration:clientId:scopes:redirectURL:responseType:additionalParameters:.
+ */
+- (instancetype)init NS_UNAVAILABLE;
+
+/*! @brief Creates an authorization request with opinionated defaults (a secure @c state, and
+        PKCE with S256 as the @c code_challenge_method).
+    @param configuration The service's configuration.
+    @param clientID The client identifier.
+    @param scopes An array of scopes to combine into a single scope string per the OAuth2 spec.
+    @param redirectURL The client's redirect URI.
+    @param responseType The expected response type.
+    @param additionalParameters The client's additional authorization parameters.
+    @remarks This convenience initializer generates a state parameter and PKCE challenges
+        automatically.
+ */
+- (instancetype)
+    initWithConfiguration:(OIDServiceConfiguration *)configuration
+                 clientId:(NSString *)clientID
+                   scopes:(nullable NSArray<NSString *> *)scopes
+              redirectURL:(NSURL *)redirectURL
+             responseType:(NSString *)responseType
+     additionalParameters:(nullable NSDictionary<NSString *, NSString *> *)additionalParameters;
+
+/*! @brief Creates an authorization request with opinionated defaults (a secure @c state, @c nonce,
+        and PKCE with S256 as the @c code_challenge_method).
+    @param configuration The service's configuration.
+    @param clientID The client identifier.
+    @param clientSecret The client secret.
+    @param scopes An array of scopes to combine into a single scope string per the OAuth2 spec.
+    @param redirectURL The client's redirect URI.
+    @param responseType The expected response type.
+    @param additionalParameters The client's additional authorization parameters.
+    @remarks This convenience initializer generates a state parameter and PKCE challenges
+        automatically.
+ */
+- (instancetype)
+    initWithConfiguration:(OIDServiceConfiguration *)configuration
+                 clientId:(NSString *)clientID
+             clientSecret:(nullable NSString *)clientSecret
+                   scopes:(nullable NSArray<NSString *> *)scopes
+              redirectURL:(NSURL *)redirectURL
+             responseType:(NSString *)responseType
+     additionalParameters:(nullable NSDictionary<NSString *, NSString *> *)additionalParameters;
+
+/*! @brief Designated initializer.
+    @param configuration The service's configuration.
+    @param clientID The client identifier.
+    @param scope A scope string per the OAuth2 spec (a space-delimited set of scopes).
+    @param redirectURL The client's redirect URI.
+    @param responseType The expected response type.
+    @param state An opaque value used by the client to maintain state between the request and
+        callback.
+    @param nonce String value used to associate a Client session with an ID Token. Can be set to nil
+        if not using OpenID Connect, although pure OAuth servers should ignore params they don't
+        understand anyway.
+    @param codeVerifier The PKCE code verifier. See @c OIDAuthorizationRequest.generateCodeVerifier.
+    @param codeChallenge The PKCE code challenge, calculated from the code verifier such as with
+        @c OIDAuthorizationRequest.codeChallengeS256ForVerifier:.
+    @param codeChallengeMethod The PKCE code challenge method.
+        ::OIDOAuthorizationRequestCodeChallengeMethodS256 when
+        @c OIDAuthorizationRequest.codeChallengeS256ForVerifier: is used to create the code
+        challenge.
+    @param additionalParameters The client's additional authorization parameters.
+ */
+- (instancetype)
+    initWithConfiguration:(OIDServiceConfiguration *)configuration
+                 clientId:(NSString *)clientID
+             clientSecret:(nullable NSString *)clientSecret
+                    scope:(nullable NSString *)scope
+              redirectURL:(nullable NSURL *)redirectURL
+             responseType:(NSString *)responseType
+                    state:(nullable NSString *)state
+                    nonce:(nullable NSString *)nonce
+             codeVerifier:(nullable NSString *)codeVerifier
+            codeChallenge:(nullable NSString *)codeChallenge
+      codeChallengeMethod:(nullable NSString *)codeChallengeMethod
+     additionalParameters:(nullable NSDictionary<NSString *, NSString *> *)additionalParameters
+    NS_DESIGNATED_INITIALIZER;
+
+/*! @brief Constructs the request URI by adding the request parameters to the query component of the
+        authorization endpoint URI using the "application/x-www-form-urlencoded" format.
+    @return A URL representing the authorization request.
+    @see https://tools.ietf.org/html/rfc6749#section-4.1.1
+ */
+- (NSURL *)authorizationRequestURL;
+
+/*! @brief Generates an OAuth state param using a random source.
+    @return The generated state.
+    @see https://tools.ietf.org/html/rfc6819#section-5.3.5
+ */
++ (nullable NSString *)generateState;
+
+/*! @brief Constructs a PKCE-compliant code verifier.
+    @return The generated code verifier.
+    @see https://tools.ietf.org/html/rfc7636#section-4.1
+ */
++ (nullable NSString *)generateCodeVerifier;
+
+/*! @brief Creates a PKCE S256 codeChallenge from the codeVerifier.
+    @param codeVerifier The code verifier from which the code challenge will be derived.
+    @return The generated code challenge.
+    @details Generate a secure code verifier to pass into this method with
+        @c OIDAuthorizationRequest.generateCodeVerifier. The matching @c #codeChallengeMethod for
+        @c #codeChallenge%s created by this method is
+        ::OIDOAuthorizationRequestCodeChallengeMethodS256.
+    @see https://tools.ietf.org/html/rfc7636#section-4.1
+ */
++ (nullable NSString *)codeChallengeS256ForVerifier:(nullable NSString *)codeVerifier;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/AppAuth/Source/AppAuthCore/OIDAuthorizationRequest.m

@@ -0,0 +1,351 @@
+/*! @file OIDAuthorizationRequest.m
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2015 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import "OIDAuthorizationRequest.h"
+
+#import "OIDDefines.h"
+#import "OIDScopeUtilities.h"
+#import "OIDServiceConfiguration.h"
+#import "OIDTokenUtilities.h"
+#import "OIDURLQueryComponent.h"
+
+/*! @brief The key for the @c configuration property for @c NSSecureCoding
+ */
+static NSString *const kConfigurationKey = @"configuration";
+
+/*! @brief Key used to encode the @c responseType property for @c NSSecureCoding, and on the URL
+        request.
+ */
+static NSString *const kResponseTypeKey = @"response_type";
+
+/*! @brief Key used to encode the @c clientID property for @c NSSecureCoding, and on the URL
+        request.
+ */
+static NSString *const kClientIDKey = @"client_id";
+
+/*! @brief Key used to encode the @c clientSecret property for @c NSSecureCoding.
+ */
+static NSString *const kClientSecretKey = @"client_secret";
+
+/*! @brief Key used to encode the @c scope property for @c NSSecureCoding, and on the URL request.
+ */
+static NSString *const kScopeKey = @"scope";
+
+/*! @brief Key used to encode the @c redirectURL property for @c NSSecureCoding, and on the URL
+        request.
+ */
+static NSString *const kRedirectURLKey = @"redirect_uri";
+
+/*! @brief Key used to encode the @c state property for @c NSSecureCoding, and on the URL request.
+ */
+static NSString *const kStateKey = @"state";
+
+/*! @brief Key used to encode the @c nonce property for @c NSSecureCoding, and on the URL request.
+ */
+static NSString *const kNonceKey = @"nonce";
+
+/*! @brief Key used to encode the @c codeVerifier property for @c NSSecureCoding.
+ */
+static NSString *const kCodeVerifierKey = @"code_verifier";
+
+/*! @brief Key used to send the @c codeChallenge on the URL request.
+ */
+static NSString *const kCodeChallengeKey = @"code_challenge";
+
+/*! @brief Key used to send the @c codeChallengeMethod on the URL request.
+ */
+static NSString *const kCodeChallengeMethodKey = @"code_challenge_method";
+
+/*! @brief Key used to encode the @c additionalParameters property for
+        @c NSSecureCoding
+ */
+static NSString *const kAdditionalParametersKey = @"additionalParameters";
+
+/*! @brief Number of random bytes generated for the @ state.
+ */
+static NSUInteger const kStateSizeBytes = 32;
+
+/*! @brief Number of random bytes generated for the @ codeVerifier.
+ */
+static NSUInteger const kCodeVerifierBytes = 32;
+
+/*! @brief Assertion text for unsupported response types.
+ */
+static NSString *const OIDOAuthUnsupportedResponseTypeMessage =
+    @"The response_type \"%@\" isn't supported. AppAuth only supports the \"code\" or \"code id_token\" response_type.";
+
+/*! @brief Code challenge request method.
+ */
+NSString *const OIDOAuthorizationRequestCodeChallengeMethodS256 = @"S256";
+
+@implementation OIDAuthorizationRequest
+
+- (instancetype)init
+    OID_UNAVAILABLE_USE_INITIALIZER(
+        @selector(initWithConfiguration:
+                               clientId:
+                                 scopes:
+                            redirectURL:
+                           responseType:
+                   additionalParameters:)
+    )
+
+/*! @brief Check if the response type is one AppAuth supports
+    @remarks AppAuth only supports the `code` and `code id_token` response types.
+    @see https://github.com/openid/AppAuth-iOS/issues/98
+    @see https://github.com/openid/AppAuth-iOS/issues/292
+ */
++ (BOOL)isSupportedResponseType:(NSString *)responseType
+{
+  NSString *codeIdToken = [@[OIDResponseTypeCode, OIDResponseTypeIDToken]
+                           componentsJoinedByString:@" "];
+  NSString *idTokenCode = [@[OIDResponseTypeIDToken, OIDResponseTypeCode]
+                           componentsJoinedByString:@" "];
+
+  return [responseType isEqualToString:OIDResponseTypeCode]
+         || [responseType isEqualToString:codeIdToken]
+         || [responseType isEqualToString:idTokenCode];
+}
+
+- (instancetype)initWithConfiguration:(OIDServiceConfiguration *)configuration
+                clientId:(NSString *)clientID
+            clientSecret:(nullable NSString *)clientSecret
+                   scope:(nullable NSString *)scope
+             redirectURL:(NSURL *)redirectURL
+            responseType:(NSString *)responseType
+                   state:(nullable NSString *)state
+                   nonce:(nullable NSString *)nonce
+            codeVerifier:(nullable NSString *)codeVerifier
+           codeChallenge:(nullable NSString *)codeChallenge
+     codeChallengeMethod:(nullable NSString *)codeChallengeMethod
+    additionalParameters:(nullable NSDictionary<NSString *, NSString *> *)additionalParameters
+{
+  self = [super init];
+  if (self) {
+    _configuration = [configuration copy];
+    _clientID = [clientID copy];
+    _clientSecret = [clientSecret copy];
+    _scope = [scope copy];
+    _redirectURL = [redirectURL copy];
+    _responseType = [responseType copy];
+    if (![[self class] isSupportedResponseType:_responseType]) {
+      NSAssert(NO, OIDOAuthUnsupportedResponseTypeMessage, _responseType);
+      return nil;
+    }
+    _state = [state copy];
+    _nonce = [nonce copy];
+    _codeVerifier = [codeVerifier copy];
+    _codeChallenge = [codeChallenge copy];
+    _codeChallengeMethod = [codeChallengeMethod copy];
+
+    _additionalParameters =
+        [[NSDictionary alloc] initWithDictionary:additionalParameters copyItems:YES];
+  }
+  return self;
+}
+
+- (instancetype)
+   initWithConfiguration:(OIDServiceConfiguration *)configuration
+                clientId:(NSString *)clientID
+            clientSecret:(NSString *)clientSecret
+                  scopes:(nullable NSArray<NSString *> *)scopes
+             redirectURL:(NSURL *)redirectURL
+            responseType:(NSString *)responseType
+    additionalParameters:(nullable NSDictionary<NSString *, NSString *> *)additionalParameters {
+
+  // generates PKCE code verifier and challenge
+  NSString *codeVerifier = [[self class] generateCodeVerifier];
+  NSString *codeChallenge = [[self class] codeChallengeS256ForVerifier:codeVerifier];
+
+  return [self initWithConfiguration:configuration
+                            clientId:clientID
+                        clientSecret:clientSecret
+                               scope:[OIDScopeUtilities scopesWithArray:scopes]
+                         redirectURL:redirectURL
+                        responseType:responseType
+                               state:[[self class] generateState]
+                               nonce:[[self class] generateState]
+                        codeVerifier:codeVerifier
+                       codeChallenge:codeChallenge
+                 codeChallengeMethod:OIDOAuthorizationRequestCodeChallengeMethodS256
+                additionalParameters:additionalParameters];
+}
+
+- (instancetype)
+    initWithConfiguration:(OIDServiceConfiguration *)configuration
+                 clientId:(NSString *)clientID
+                   scopes:(nullable NSArray<NSString *> *)scopes
+              redirectURL:(NSURL *)redirectURL
+             responseType:(NSString *)responseType
+    additionalParameters:(nullable NSDictionary<NSString *, NSString *> *)additionalParameters {
+  return [self initWithConfiguration:configuration
+                            clientId:clientID
+                        clientSecret:nil
+                              scopes:scopes
+                         redirectURL:redirectURL
+                        responseType:responseType
+                additionalParameters:additionalParameters];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(nullable NSZone *)zone {
+  // The documentation for NSCopying specifically advises us to return a reference to the original
+  // instance in the case where instances are immutable (as ours is):
+  // "Implement NSCopying by retaining the original instead of creating a new copy when the class
+  // and its contents are immutable."
+  return self;
+}
+
+#pragma mark - NSSecureCoding
+
++ (BOOL)supportsSecureCoding {
+  return YES;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
+  OIDServiceConfiguration *configuration =
+      [aDecoder decodeObjectOfClass:[OIDServiceConfiguration class]
+                             forKey:kConfigurationKey];
+  NSString *responseType = [aDecoder decodeObjectOfClass:[NSString class] forKey:kResponseTypeKey];
+  NSString *clientID = [aDecoder decodeObjectOfClass:[NSString class] forKey:kClientIDKey];
+  NSString *clientSecret = [aDecoder decodeObjectOfClass:[NSString class] forKey:kClientSecretKey];
+  NSString *scope = [aDecoder decodeObjectOfClass:[NSString class] forKey:kScopeKey];
+  NSURL *redirectURL = [aDecoder decodeObjectOfClass:[NSURL class] forKey:kRedirectURLKey];
+  NSString *state = [aDecoder decodeObjectOfClass:[NSString class] forKey:kStateKey];
+  NSString *nonce = [aDecoder decodeObjectOfClass:[NSString class] forKey:kNonceKey];
+  NSString *codeVerifier = [aDecoder decodeObjectOfClass:[NSString class] forKey:kCodeVerifierKey];
+  NSString *codeChallenge =
+      [aDecoder decodeObjectOfClass:[NSString class] forKey:kCodeChallengeKey];
+  NSString *codeChallengeMethod =
+      [aDecoder decodeObjectOfClass:[NSString class] forKey:kCodeChallengeMethodKey];
+  NSSet *additionalParameterCodingClasses = [NSSet setWithArray:@[
+    [NSDictionary class],
+    [NSString class]
+  ]];
+  NSDictionary *additionalParameters =
+      [aDecoder decodeObjectOfClasses:additionalParameterCodingClasses
+                               forKey:kAdditionalParametersKey];
+
+  self = [self initWithConfiguration:configuration
+                            clientId:clientID
+                        clientSecret:clientSecret
+                               scope:scope
+                         redirectURL:redirectURL
+                        responseType:responseType
+                               state:state
+                               nonce:nonce
+                        codeVerifier:codeVerifier
+                       codeChallenge:codeChallenge
+                 codeChallengeMethod:codeChallengeMethod
+                additionalParameters:additionalParameters];
+  return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)aCoder {
+  [aCoder encodeObject:_configuration forKey:kConfigurationKey];
+  [aCoder encodeObject:_responseType forKey:kResponseTypeKey];
+  [aCoder encodeObject:_clientID forKey:kClientIDKey];
+  [aCoder encodeObject:_clientSecret forKey:kClientSecretKey];
+  [aCoder encodeObject:_scope forKey:kScopeKey];
+  [aCoder encodeObject:_redirectURL forKey:kRedirectURLKey];
+  [aCoder encodeObject:_state forKey:kStateKey];
+  [aCoder encodeObject:_nonce forKey:kNonceKey];
+  [aCoder encodeObject:_codeVerifier forKey:kCodeVerifierKey];
+  [aCoder encodeObject:_codeChallenge forKey:kCodeChallengeKey];
+  [aCoder encodeObject:_codeChallengeMethod forKey:kCodeChallengeMethodKey];
+  [aCoder encodeObject:_additionalParameters forKey:kAdditionalParametersKey];
+}
+
+#pragma mark - NSObject overrides
+
+- (NSString *)description {
+  return [NSString stringWithFormat:@"<%@: %p, request: %@>",
+                                    NSStringFromClass([self class]),
+                                    (void *)self,
+                                    self.authorizationRequestURL];
+}
+
+#pragma mark - State and PKCE verifier/challenge generation Methods
+
++ (nullable NSString *)generateCodeVerifier {
+  return [OIDTokenUtilities randomURLSafeStringWithSize:kCodeVerifierBytes];
+}
+
++ (nullable NSString *)generateState {
+  return [OIDTokenUtilities randomURLSafeStringWithSize:kStateSizeBytes];
+}
+
++ (nullable NSString *)codeChallengeS256ForVerifier:(NSString *)codeVerifier {
+  if (!codeVerifier) {
+    return nil;
+  }
+  // generates the code_challenge per spec https://tools.ietf.org/html/rfc7636#section-4.2
+  // code_challenge = BASE64URL-ENCODE(SHA256(ASCII(code_verifier)))
+  // NB. the ASCII conversion on the code_verifier entropy was done at time of generation.
+  NSData *sha256Verifier = [OIDTokenUtilities sha256:codeVerifier];
+  return [OIDTokenUtilities encodeBase64urlNoPadding:sha256Verifier];
+}
+
+#pragma mark -
+
+- (NSURL *)authorizationRequestURL {
+  OIDURLQueryComponent *query = [[OIDURLQueryComponent alloc] init];
+
+  // Required parameters.
+  [query addParameter:kResponseTypeKey value:_responseType];
+  [query addParameter:kClientIDKey value:_clientID];
+
+  // Add any additional parameters the client has specified.
+  [query addParameters:_additionalParameters];
+
+  // Add optional parameters, as applicable.
+  if (_redirectURL) {
+    [query addParameter:kRedirectURLKey value:_redirectURL.absoluteString];
+  }
+  if (_scope) {
+    [query addParameter:kScopeKey value:_scope];
+  }
+  if (_state) {
+    [query addParameter:kStateKey value:_state];
+  }
+  if (_nonce) {
+    [query addParameter:kNonceKey value:_nonce];
+  }
+  if (_codeChallenge) {
+    [query addParameter:kCodeChallengeKey value:_codeChallenge];
+  }
+  if (_codeChallengeMethod) {
+    [query addParameter:kCodeChallengeMethodKey value:_codeChallengeMethod];
+  }
+
+  // Construct the URL:
+  return [query URLByReplacingQueryInURL:_configuration.authorizationEndpoint];
+}
+
+#pragma mark - OIDExternalUserAgentRequest
+
+- (NSURL *)externalUserAgentRequestURL {
+  return [self authorizationRequestURL];
+}
+
+- (NSString *)redirectScheme {
+  return [[self redirectURL] scheme];
+}
+
+@end

Pods/AppAuth/Source/AppAuthCore/OIDAuthorizationResponse.h

@@ -0,0 +1,128 @@
+/*! @file OIDAuthorizationResponse.h
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2015 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@class OIDAuthorizationRequest;
+@class OIDTokenRequest;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/*! @brief Represents the response to an authorization request.
+    @see https://tools.ietf.org/html/rfc6749#section-4.1.2
+    @see https://tools.ietf.org/html/rfc6749#section-5.1
+    @see http://openid.net/specs/openid-connect-core-1_0.html#ImplicitAuthResponse
+ */
+@interface OIDAuthorizationResponse : NSObject <NSCopying, NSSecureCoding>
+
+/*! @brief The request which was serviced.
+ */
+@property(nonatomic, readonly) OIDAuthorizationRequest *request;
+
+/*! @brief The authorization code generated by the authorization server.
+    @discussion Set when the response_type requested includes 'code'.
+    @remarks code
+ */
+@property(nonatomic, readonly, nullable) NSString *authorizationCode;
+
+/*! @brief REQUIRED if the "state" parameter was present in the client authorization request. The
+        exact value received from the client.
+    @remarks state
+ */
+@property(nonatomic, readonly, nullable) NSString *state;
+
+/*! @brief The access token generated by the authorization server.
+    @discussion Set when the response_type requested includes 'token'.
+    @remarks access_token
+    @see http://openid.net/specs/openid-connect-core-1_0.html#ImplicitAuthResponse
+ */
+@property(nonatomic, readonly, nullable) NSString *accessToken;
+
+/*! @brief The approximate expiration date & time of the access token.
+    @discussion Set when the response_type requested includes 'token'.
+    @remarks expires_in
+    @seealso OIDAuthorizationResponse.accessToken
+    @see http://openid.net/specs/openid-connect-core-1_0.html#ImplicitAuthResponse
+ */
+@property(nonatomic, readonly, nullable) NSDate *accessTokenExpirationDate;
+
+/*! @brief Typically "Bearer" when present. Otherwise, another token_type value that the Client has
+        negotiated with the Authorization Server.
+    @discussion Set when the response_type requested includes 'token'.
+    @remarks token_type
+    @see http://openid.net/specs/openid-connect-core-1_0.html#ImplicitAuthResponse
+ */
+@property(nonatomic, readonly, nullable) NSString *tokenType;
+
+/*! @brief ID Token value associated with the authenticated session.
+    @discussion Set when the response_type requested includes 'id_token'.
+    @remarks id_token
+    @see http://openid.net/specs/openid-connect-core-1_0.html#IDToken
+    @see http://openid.net/specs/openid-connect-core-1_0.html#ImplicitAuthResponse
+ */
+@property(nonatomic, readonly, nullable) NSString *idToken;
+
+/*! @brief The scope of the access token. OPTIONAL, if identical to the scopes requested, otherwise,
+        REQUIRED.
+    @remarks scope
+    @see https://tools.ietf.org/html/rfc6749#section-5.1
+ */
+@property(nonatomic, readonly, nullable) NSString *scope;
+
+/*! @brief Additional parameters returned from the authorization server.
+ */
+@property(nonatomic, readonly, nullable)
+    NSDictionary<NSString *, NSObject<NSCopying> *> *additionalParameters;
+
+/*! @internal
+    @brief Unavailable. Please use initWithRequest:parameters:.
+ */
+- (instancetype)init NS_UNAVAILABLE;
+
+/*! @brief Designated initializer.
+    @param request The serviced request.
+    @param parameters The decoded parameters returned from the Authorization Server.
+    @remarks Known parameters are extracted from the @c parameters parameter and the normative
+        properties are populated. Non-normative parameters are placed in the
+        @c #additionalParameters dictionary.
+ */
+- (instancetype)initWithRequest:(OIDAuthorizationRequest *)request
+    parameters:(NSDictionary<NSString *, NSObject<NSCopying> *> *)parameters
+    NS_DESIGNATED_INITIALIZER;
+
+/*! @brief Creates a token request suitable for exchanging an authorization code for an access
+        token.
+    @return A @c OIDTokenRequest suitable for exchanging an authorization code for an access
+        token.
+    @see https://tools.ietf.org/html/rfc6749#section-4.1.3
+ */
+- (nullable OIDTokenRequest *)tokenExchangeRequest;
+
+/*! @brief Creates a token request suitable for exchanging an authorization code for an access
+        token.
+    @param additionalParameters Additional parameters for the token request.
+    @return A @c OIDTokenRequest suitable for exchanging an authorization code for an access
+        token.
+    @see https://tools.ietf.org/html/rfc6749#section-4.1.3
+ */
+- (nullable OIDTokenRequest *)tokenExchangeRequestWithAdditionalParameters:
+    (nullable NSDictionary<NSString *, NSString *> *)additionalParameters;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/AppAuth/Source/AppAuthCore/OIDAuthorizationResponse.m

@@ -0,0 +1,210 @@
+/*! @file OIDAuthorizationResponse.m
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2015 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import "OIDAuthorizationResponse.h"
+
+#import "OIDAuthorizationRequest.h"
+#import "OIDDefines.h"
+#import "OIDError.h"
+#import "OIDFieldMapping.h"
+#import "OIDTokenRequest.h"
+#import "OIDTokenUtilities.h"
+
+/*! @brief The key for the @c authorizationCode property in the incoming parameters and for
+        @c NSSecureCoding.
+ */
+static NSString *const kAuthorizationCodeKey = @"code";
+
+/*! @brief The key for the @c state property in the incoming parameters and for @c NSSecureCoding.
+ */
+static NSString *const kStateKey = @"state";
+
+/*! @brief The key for the @c accessToken property in the incoming parameters and for
+        @c NSSecureCoding.
+ */
+static NSString *const kAccessTokenKey = @"access_token";
+
+/*! @brief The key for the @c accessTokenExpirationDate property in the incoming parameters and for
+        @c NSSecureCoding.
+ */
+static NSString *const kExpiresInKey = @"expires_in";
+
+/*! @brief The key for the @c tokenType property in the incoming parameters and for
+        @c NSSecureCoding.
+ */
+static NSString *const kTokenTypeKey = @"token_type";
+
+/*! @brief The key for the @c idToken property in the incoming parameters and for @c NSSecureCoding.
+ */
+static NSString *const kIDTokenKey = @"id_token";
+
+/*! @brief The key for the @c scope property in the incoming parameters and for @c NSSecureCoding.
+ */
+static NSString *const kScopeKey = @"scope";
+
+/*! @brief Key used to encode the @c additionalParameters property for @c NSSecureCoding
+ */
+static NSString *const kAdditionalParametersKey = @"additionalParameters";
+
+/*! @brief Key used to encode the @c request property for @c NSSecureCoding
+ */
+static NSString *const kRequestKey = @"request";
+
+/*! @brief The exception thrown when a developer tries to create a token exchange request from an
+        authorization request with no authorization code.
+ */
+static NSString *const kTokenExchangeRequestException =
+    @"Attempted to create a token exchange request from an authorization response with no "
+    "authorization code.";
+
+@implementation OIDAuthorizationResponse
+
+/*! @brief Returns a mapping of incoming parameters to instance variables.
+    @return A mapping of incoming parameters to instance variables.
+ */
++ (NSDictionary<NSString *, OIDFieldMapping *> *)fieldMap {
+  static NSMutableDictionary<NSString *, OIDFieldMapping *> *fieldMap;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    fieldMap = [NSMutableDictionary dictionary];
+    fieldMap[kStateKey] =
+        [[OIDFieldMapping alloc] initWithName:@"_state" type:[NSString class]];
+    fieldMap[kAuthorizationCodeKey] =
+        [[OIDFieldMapping alloc] initWithName:@"_authorizationCode" type:[NSString class]];
+    fieldMap[kAccessTokenKey] =
+        [[OIDFieldMapping alloc] initWithName:@"_accessToken" type:[NSString class]];
+    fieldMap[kExpiresInKey] =
+        [[OIDFieldMapping alloc] initWithName:@"_accessTokenExpirationDate"
+                                         type:[NSDate class]
+                                   conversion:^id _Nullable(NSObject *_Nullable value) {
+          if (![value isKindOfClass:[NSNumber class]]) {
+            return value;
+          }
+          NSNumber *valueAsNumber = (NSNumber *)value;
+          return [NSDate dateWithTimeIntervalSinceNow:[valueAsNumber longLongValue]];
+        }];
+    fieldMap[kTokenTypeKey] =
+        [[OIDFieldMapping alloc] initWithName:@"_tokenType" type:[NSString class]];
+    fieldMap[kIDTokenKey] =
+        [[OIDFieldMapping alloc] initWithName:@"_idToken" type:[NSString class]];
+    fieldMap[kScopeKey] =
+        [[OIDFieldMapping alloc] initWithName:@"_scope" type:[NSString class]];
+  });
+  return fieldMap;
+}
+
+#pragma mark - Initializers
+
+- (instancetype)init
+    OID_UNAVAILABLE_USE_INITIALIZER(@selector(initWithRequest:parameters:))
+
+- (instancetype)initWithRequest:(OIDAuthorizationRequest *)request
+    parameters:(NSDictionary<NSString *, NSObject<NSCopying> *> *)parameters {
+  self = [super init];
+  if (self) {
+    _request = [request copy];
+    NSDictionary<NSString *, NSObject<NSCopying> *> *additionalParameters =
+        [OIDFieldMapping remainingParametersWithMap:[[self class] fieldMap]
+                                         parameters:parameters
+                                           instance:self];
+    _additionalParameters = additionalParameters;
+  }
+  return self;
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(nullable NSZone *)zone {
+  // The documentation for NSCopying specifically advises us to return a reference to the original
+  // instance in the case where instances are immutable (as ours is):
+  // "Implement NSCopying by retaining the original instead of creating a new copy when the class
+  // and its contents are immutable."
+  return self;
+}
+
+#pragma mark - NSSecureCoding
+
++ (BOOL)supportsSecureCoding {
+  return YES;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
+  OIDAuthorizationRequest *request =
+      [aDecoder decodeObjectOfClass:[OIDAuthorizationRequest class] forKey:kRequestKey];
+  self = [self initWithRequest:request parameters:@{ }];
+  if (self) {
+    [OIDFieldMapping decodeWithCoder:aDecoder map:[[self class] fieldMap] instance:self];
+    _additionalParameters = [aDecoder decodeObjectOfClasses:[OIDFieldMapping JSONTypes]
+                                                     forKey:kAdditionalParametersKey];
+  }
+  return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)aCoder {
+  [aCoder encodeObject:_request forKey:kRequestKey];
+  [OIDFieldMapping encodeWithCoder:aCoder map:[[self class] fieldMap] instance:self];
+  [aCoder encodeObject:_additionalParameters forKey:kAdditionalParametersKey];
+}
+
+#pragma mark - NSObject overrides
+
+- (NSString *)description {
+  return [NSString stringWithFormat:@"<%@: %p, authorizationCode: %@, state: \"%@\", accessToken: "
+                                     "\"%@\", accessTokenExpirationDate: %@, tokenType: %@, "
+                                     "idToken: \"%@\", scope: \"%@\", additionalParameters: %@, "
+                                     "request: %@>",
+                                    NSStringFromClass([self class]),
+                                    (void *)self,
+                                    _authorizationCode,
+                                    _state,
+                                    [OIDTokenUtilities redact:_accessToken],
+                                    _accessTokenExpirationDate,
+                                    _tokenType,
+                                    [OIDTokenUtilities redact:_idToken],
+                                    _scope,
+                                    _additionalParameters,
+                                    _request];
+}
+
+#pragma mark -
+
+- (OIDTokenRequest *)tokenExchangeRequest {
+  return [self tokenExchangeRequestWithAdditionalParameters:nil];
+}
+
+- (OIDTokenRequest *)tokenExchangeRequestWithAdditionalParameters:
+    (NSDictionary<NSString *, NSString *> *)additionalParameters {
+  // TODO: add a unit test to confirm exception is thrown when expected and the request is created
+  //       with the correct parameters.
+  if (!_authorizationCode) {
+    [NSException raise:kTokenExchangeRequestException
+                format:kTokenExchangeRequestException];
+  }
+  return [[OIDTokenRequest alloc] initWithConfiguration:_request.configuration
+                                              grantType:OIDGrantTypeAuthorizationCode
+                                      authorizationCode:_authorizationCode
+                                            redirectURL:_request.redirectURL
+                                               clientID:_request.clientID
+                                           clientSecret:_request.clientSecret
+                                                  scope:nil
+                                           refreshToken:nil
+                                           codeVerifier:_request.codeVerifier
+                                   additionalParameters:additionalParameters];
+}
+
+@end

Pods/AppAuth/Source/AppAuthCore/OIDAuthorizationService.h

@@ -0,0 +1,170 @@
+/*! @file OIDAuthorizationService.h
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2015 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@class OIDAuthorization;
+@class OIDAuthorizationRequest;
+@class OIDAuthorizationResponse;
+@class OIDEndSessionRequest;
+@class OIDEndSessionResponse;
+@class OIDRegistrationRequest;
+@class OIDRegistrationResponse;
+@class OIDServiceConfiguration;
+@class OIDTokenRequest;
+@class OIDTokenResponse;
+@protocol OIDExternalUserAgent;
+@protocol OIDExternalUserAgentSession;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/*! @brief Represents the type of block used as a callback for creating a service configuration from
+        a remote OpenID Connect Discovery document.
+    @param configuration The service configuration, if available.
+    @param error The error if an error occurred.
+ */
+typedef void (^OIDDiscoveryCallback)(OIDServiceConfiguration *_Nullable configuration,
+                                     NSError *_Nullable error);
+
+/*! @brief Represents the type of block used as a callback for various methods of
+        @c OIDAuthorizationService.
+    @param authorizationResponse The authorization response, if available.
+    @param error The error if an error occurred.
+ */
+typedef void (^OIDAuthorizationCallback)(OIDAuthorizationResponse *_Nullable authorizationResponse,
+                                         NSError *_Nullable error);
+
+/*! @brief Block used as a callback for the end-session request of @c OIDAuthorizationService.
+    @param endSessionResponse The end-session response, if available.
+    @param error The error if an error occurred.
+ */
+typedef void (^OIDEndSessionCallback)(OIDEndSessionResponse *_Nullable endSessionResponse,
+                                      NSError *_Nullable error);
+
+/*! @brief Represents the type of block used as a callback for various methods of
+        @c OIDAuthorizationService.
+    @param tokenResponse The token response, if available.
+    @param error The error if an error occurred.
+ */
+typedef void (^OIDTokenCallback)(OIDTokenResponse *_Nullable tokenResponse,
+                                 NSError *_Nullable error);
+
+/*! @brief Represents the type of dictionary used to specify additional querystring parameters
+        when making authorization or token endpoint requests.
+ */
+typedef NSDictionary<NSString *, NSString *> *_Nullable OIDTokenEndpointParameters;
+
+/*! @brief Represents the type of block used as a callback for various methods of
+        @c OIDAuthorizationService.
+    @param registrationResponse The registration response, if available.
+    @param error The error if an error occurred.
+*/
+typedef void (^OIDRegistrationCompletion)(OIDRegistrationResponse *_Nullable registrationResponse,
+                                          NSError *_Nullable error);
+
+/*! @brief Performs various OAuth and OpenID Connect related calls via the user agent or
+        \NSURLSession.
+ */
+@interface OIDAuthorizationService : NSObject
+
+/*! @brief The service's configuration.
+    @remarks Each authorization service is initialized with a configuration. This configuration
+        specifies how to connect to a particular OAuth provider. Clients should use separate
+        authorization service instances for each provider they wish to integrate with.
+        Configurations may be created manually, or via an OpenID Connect Discovery Document.
+ */
+@property(nonatomic, readonly) OIDServiceConfiguration *configuration;
+
+/*! @internal
+    @brief Unavailable. This class should not be initialized.
+ */
+- (instancetype)init NS_UNAVAILABLE;
+
+/*! @brief Convenience method for creating an authorization service configuration from an OpenID
+        Connect compliant issuer URL.
+    @param issuerURL The service provider's OpenID Connect issuer.
+    @param completion A block which will be invoked when the authorization service configuration has
+        been created, or when an error has occurred.
+    @see https://openid.net/specs/openid-connect-discovery-1_0.html
+ */
++ (void)discoverServiceConfigurationForIssuer:(NSURL *)issuerURL
+                                   completion:(OIDDiscoveryCallback)completion;
+
+
+/*! @brief Convenience method for creating an authorization service configuration from an OpenID
+        Connect compliant identity provider's discovery document.
+    @param discoveryURL The URL of the service provider's OpenID Connect discovery document.
+    @param completion A block which will be invoked when the authorization service configuration has
+        been created, or when an error has occurred.
+    @see https://openid.net/specs/openid-connect-discovery-1_0.html
+ */
++ (void)discoverServiceConfigurationForDiscoveryURL:(NSURL *)discoveryURL
+                                         completion:(OIDDiscoveryCallback)completion;
+
+/*! @brief Perform an authorization flow using a generic flow shim.
+    @param request The authorization request.
+    @param externalUserAgent Generic external user-agent that can present an authorization
+        request.
+    @param callback The method called when the request has completed or failed.
+    @return A @c OIDExternalUserAgentSession instance which will terminate when it
+        receives a @c OIDExternalUserAgentSession.cancel message, or after processing a
+        @c OIDExternalUserAgentSession.resumeExternalUserAgentFlowWithURL: message.
+ */
++ (id<OIDExternalUserAgentSession>) presentAuthorizationRequest:(OIDAuthorizationRequest *)request
+    externalUserAgent:(id<OIDExternalUserAgent>)externalUserAgent
+             callback:(OIDAuthorizationCallback)callback;
+
+/*! @brief Perform a logout request.
+    @param request The end-session logout request.
+    @param externalUserAgent Generic external user-agent that can present user-agent requests.
+    @param callback The method called when the request has completed or failed.
+    @return A @c OIDExternalUserAgentSession instance which will terminate when it
+        receives a @c OIDExternalUserAgentSession.cancel message, or after processing a
+        @c OIDExternalUserAgentSession.resumeExternalUserAgentFlowWithURL: message.
+    @see http://openid.net/specs/openid-connect-session-1_0.html#RPLogout
+ */
++ (id<OIDExternalUserAgentSession>)
+    presentEndSessionRequest:(OIDEndSessionRequest *)request
+           externalUserAgent:(id<OIDExternalUserAgent>)externalUserAgent
+                    callback:(OIDEndSessionCallback)callback;
+
+/*! @brief Performs a token request.
+    @param request The token request.
+    @param callback The method called when the request has completed or failed.
+ */
++ (void)performTokenRequest:(OIDTokenRequest *)request callback:(OIDTokenCallback)callback;
+
+/*! @brief Performs a token request.
+    @param request The token request.
+    @param authorizationResponse The original authorization response related to this token request.
+    @param callback The method called when the request has completed or failed.
+ */
++ (void)performTokenRequest:(OIDTokenRequest *)request
+    originalAuthorizationResponse:(OIDAuthorizationResponse *_Nullable)authorizationResponse
+                         callback:(OIDTokenCallback)callback;
+
+/*! @brief Performs a registration request.
+    @param request The registration request.
+    @param completion The method called when the request has completed or failed.
+ */
++ (void)performRegistrationRequest:(OIDRegistrationRequest *)request
+                        completion:(OIDRegistrationCompletion)completion;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/AppAuth/Source/AppAuthCore/OIDAuthorizationService.m

@@ -0,0 +1,790 @@
+/*! @file OIDAuthorizationService.m
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2015 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import "OIDAuthorizationService.h"
+
+#import "OIDAuthorizationRequest.h"
+#import "OIDAuthorizationResponse.h"
+#import "OIDDefines.h"
+#import "OIDEndSessionRequest.h"
+#import "OIDEndSessionResponse.h"
+#import "OIDErrorUtilities.h"
+#import "OIDExternalUserAgent.h"
+#import "OIDExternalUserAgentSession.h"
+#import "OIDIDToken.h"
+#import "OIDRegistrationRequest.h"
+#import "OIDRegistrationResponse.h"
+#import "OIDServiceConfiguration.h"
+#import "OIDServiceDiscovery.h"
+#import "OIDTokenRequest.h"
+#import "OIDTokenResponse.h"
+#import "OIDURLQueryComponent.h"
+#import "OIDURLSessionProvider.h"
+
+/*! @brief Path appended to an OpenID Connect issuer for discovery
+    @see https://openid.net/specs/openid-connect-discovery-1_0.html#ProviderConfig
+ */
+static NSString *const kOpenIDConfigurationWellKnownPath = @".well-known/openid-configuration";
+
+/*! @brief Max allowable iat (Issued At) time skew
+    @see https://openid.net/specs/openid-connect-core-1_0.html#IDTokenValidation
+ */
+static int const kOIDAuthorizationSessionIATMaxSkew = 600;
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface OIDAuthorizationSession : NSObject<OIDExternalUserAgentSession>
+
+- (instancetype)init NS_UNAVAILABLE;
+
+- (instancetype)initWithRequest:(OIDAuthorizationRequest *)request
+    NS_DESIGNATED_INITIALIZER;
+
+@end
+
+@implementation OIDAuthorizationSession {
+  OIDAuthorizationRequest *_request;
+  id<OIDExternalUserAgent> _externalUserAgent;
+  OIDAuthorizationCallback _pendingauthorizationFlowCallback;
+}
+
+- (instancetype)initWithRequest:(OIDAuthorizationRequest *)request {
+  self = [super init];
+  if (self) {
+    _request = [request copy];
+  }
+  return self;
+}
+
+- (void)presentAuthorizationWithExternalUserAgent:(id<OIDExternalUserAgent>)externalUserAgent
+                                         callback:(OIDAuthorizationCallback)authorizationFlowCallback {
+  _externalUserAgent = externalUserAgent;
+  _pendingauthorizationFlowCallback = authorizationFlowCallback;
+  BOOL authorizationFlowStarted =
+      [_externalUserAgent presentExternalUserAgentRequest:_request session:self];
+  if (!authorizationFlowStarted) {
+    NSError *safariError = [OIDErrorUtilities errorWithCode:OIDErrorCodeSafariOpenError
+                                            underlyingError:nil
+                                                description:@"Unable to open Safari."];
+    [self didFinishWithResponse:nil error:safariError];
+  }
+}
+
+- (void)cancel {
+  [self cancelWithCompletion:nil];
+}
+
+- (void)cancelWithCompletion:(nullable void (^)(void))completion {
+  [_externalUserAgent dismissExternalUserAgentAnimated:YES completion:^{
+      NSError *error = [OIDErrorUtilities errorWithCode:OIDErrorCodeUserCanceledAuthorizationFlow
+                                        underlyingError:nil
+                                            description:@"Authorization flow was cancelled."];
+      [self didFinishWithResponse:nil error:error];
+      if (completion) completion();
+  }];
+}
+
+/*! @brief Does the redirection URL equal another URL down to the path component?
+    @param URL The first redirect URI to compare.
+    @param redirectionURL The second redirect URI to compare.
+    @return YES if the URLs match down to the path level (query params are ignored).
+ */
++ (BOOL)URL:(NSURL *)URL matchesRedirectionURL:(NSURL *)redirectionURL {
+  NSURL *standardizedURL = [URL standardizedURL];
+  NSURL *standardizedRedirectURL = [redirectionURL standardizedURL];
+
+  return [standardizedURL.scheme caseInsensitiveCompare:standardizedRedirectURL.scheme] == NSOrderedSame
+      && OIDIsEqualIncludingNil(standardizedURL.user, standardizedRedirectURL.user)
+      && OIDIsEqualIncludingNil(standardizedURL.password, standardizedRedirectURL.password)
+      && OIDIsEqualIncludingNil(standardizedURL.host, standardizedRedirectURL.host)
+      && OIDIsEqualIncludingNil(standardizedURL.port, standardizedRedirectURL.port)
+      && OIDIsEqualIncludingNil(standardizedURL.path, standardizedRedirectURL.path);
+}
+
+- (BOOL)shouldHandleURL:(NSURL *)URL {
+  return [[self class] URL:URL matchesRedirectionURL:_request.redirectURL];
+}
+
+- (BOOL)resumeExternalUserAgentFlowWithURL:(NSURL *)URL {
+  // rejects URLs that don't match redirect (these may be completely unrelated to the authorization)
+  if (![self shouldHandleURL:URL]) {
+    return NO;
+  }
+  
+  AppAuthRequestTrace(@"Authorization Response: %@", URL);
+  
+  // checks for an invalid state
+  if (!_pendingauthorizationFlowCallback) {
+    [NSException raise:OIDOAuthExceptionInvalidAuthorizationFlow
+                format:@"%@", OIDOAuthExceptionInvalidAuthorizationFlow, nil];
+  }
+
+  OIDURLQueryComponent *query = [[OIDURLQueryComponent alloc] initWithURL:URL];
+
+  NSError *error;
+  OIDAuthorizationResponse *response = nil;
+
+  // checks for an OAuth error response as per RFC6749 Section 4.1.2.1
+  if (query.dictionaryValue[OIDOAuthErrorFieldError]) {
+    error = [OIDErrorUtilities OAuthErrorWithDomain:OIDOAuthAuthorizationErrorDomain
+                                      OAuthResponse:query.dictionaryValue
+                                    underlyingError:nil];
+  }
+
+  // no error, should be a valid OAuth 2.0 response
+  if (!error) {
+    response = [[OIDAuthorizationResponse alloc] initWithRequest:_request
+                                                      parameters:query.dictionaryValue];
+      
+    // verifies that the state in the response matches the state in the request, or both are nil
+    if (!OIDIsEqualIncludingNil(_request.state, response.state)) {
+      NSMutableDictionary *userInfo = [query.dictionaryValue mutableCopy];
+      userInfo[NSLocalizedDescriptionKey] =
+        [NSString stringWithFormat:@"State mismatch, expecting %@ but got %@ in authorization "
+                                   "response %@",
+                                   _request.state,
+                                   response.state,
+                                   response];
+      response = nil;
+      error = [NSError errorWithDomain:OIDOAuthAuthorizationErrorDomain
+                                  code:OIDErrorCodeOAuthAuthorizationClientError
+                              userInfo:userInfo];
+      }
+  }
+
+  [_externalUserAgent dismissExternalUserAgentAnimated:YES completion:^{
+      [self didFinishWithResponse:response error:error];
+  }];
+
+  return YES;
+}
+
+- (void)failExternalUserAgentFlowWithError:(NSError *)error {
+  [self didFinishWithResponse:nil error:error];
+}
+
+/*! @brief Invokes the pending callback and performs cleanup.
+    @param response The authorization response, if any to return to the callback.
+    @param error The error, if any, to return to the callback.
+ */
+- (void)didFinishWithResponse:(nullable OIDAuthorizationResponse *)response
+                        error:(nullable NSError *)error {
+  OIDAuthorizationCallback callback = _pendingauthorizationFlowCallback;
+  _pendingauthorizationFlowCallback = nil;
+  _externalUserAgent = nil;
+  if (callback) {
+    callback(response, error);
+  }
+}
+
+@end
+
+@interface OIDEndSessionImplementation : NSObject<OIDExternalUserAgentSession> {
+  // private variables
+  OIDEndSessionRequest *_request;
+  id<OIDExternalUserAgent> _externalUserAgent;
+  OIDEndSessionCallback _pendingEndSessionCallback;
+}
+- (instancetype)init NS_UNAVAILABLE;
+
+- (instancetype)initWithRequest:(OIDEndSessionRequest *)request
+    NS_DESIGNATED_INITIALIZER;
+@end
+
+
+@implementation OIDEndSessionImplementation
+
+- (instancetype)initWithRequest:(OIDEndSessionRequest *)request {
+  self = [super init];
+  if (self) {
+    _request = [request copy];
+  }
+  return self;
+}
+
+- (void)presentAuthorizationWithExternalUserAgent:(id<OIDExternalUserAgent>)externalUserAgent
+                                         callback:(OIDEndSessionCallback)authorizationFlowCallback {
+  _externalUserAgent = externalUserAgent;
+  _pendingEndSessionCallback = authorizationFlowCallback;
+  BOOL authorizationFlowStarted =
+      [_externalUserAgent presentExternalUserAgentRequest:_request session:self];
+  if (!authorizationFlowStarted) {
+    NSError *safariError = [OIDErrorUtilities errorWithCode:OIDErrorCodeSafariOpenError
+                                            underlyingError:nil
+                                                description:@"Unable to open Safari."];
+    [self didFinishWithResponse:nil error:safariError];
+  }
+}
+
+- (void)cancel {
+  [self cancelWithCompletion:nil];
+}
+
+- (void)cancelWithCompletion:(nullable void (^)(void))completion {
+  [_externalUserAgent dismissExternalUserAgentAnimated:YES completion:^{
+    NSError *error = [OIDErrorUtilities
+                      errorWithCode:OIDErrorCodeUserCanceledAuthorizationFlow
+                      underlyingError:nil
+                      description:nil];
+    [self didFinishWithResponse:nil error:error];
+    if (completion) completion();
+  }];
+}
+
+- (BOOL)shouldHandleURL:(NSURL *)URL {
+  // The logic of when to handle the URL is the same as for authorization requests: should match
+  // down to the path component.
+  return [[OIDAuthorizationSession class] URL:URL
+                        matchesRedirectionURL:_request.postLogoutRedirectURL];
+}
+
+- (BOOL)resumeExternalUserAgentFlowWithURL:(NSURL *)URL {
+  // rejects URLs that don't match redirect (these may be completely unrelated to the authorization)
+  if (![self shouldHandleURL:URL]) {
+    return NO;
+  }
+  // checks for an invalid state
+  if (!_pendingEndSessionCallback) {
+    [NSException raise:OIDOAuthExceptionInvalidAuthorizationFlow
+                format:@"%@", OIDOAuthExceptionInvalidAuthorizationFlow, nil];
+  }
+  
+  
+  NSError *error;
+  OIDEndSessionResponse *response = nil;
+
+  OIDURLQueryComponent *query = [[OIDURLQueryComponent alloc] initWithURL:URL];
+  response = [[OIDEndSessionResponse alloc] initWithRequest:_request
+                                                 parameters:query.dictionaryValue];
+  
+  // verifies that the state in the response matches the state in the request, or both are nil
+  if (!OIDIsEqualIncludingNil(_request.state, response.state)) {
+    NSMutableDictionary *userInfo = [query.dictionaryValue mutableCopy];
+    userInfo[NSLocalizedDescriptionKey] =
+    [NSString stringWithFormat:@"State mismatch, expecting %@ but got %@ in authorization "
+     "response %@",
+     _request.state,
+     response.state,
+     response];
+    response = nil;
+    error = [NSError errorWithDomain:OIDOAuthAuthorizationErrorDomain
+                                code:OIDErrorCodeOAuthAuthorizationClientError
+                            userInfo:userInfo];
+  }
+  
+  [_externalUserAgent dismissExternalUserAgentAnimated:YES completion:^{
+    [self didFinishWithResponse:response error:error];
+  }];
+  
+  return YES;
+}
+
+- (void)failExternalUserAgentFlowWithError:(NSError *)error {
+  [self didFinishWithResponse:nil error:error];
+}
+
+/*! @brief Invokes the pending callback and performs cleanup.
+ @param response The authorization response, if any to return to the callback.
+ @param error The error, if any, to return to the callback.
+ */
+- (void)didFinishWithResponse:(nullable OIDEndSessionResponse *)response
+                        error:(nullable NSError *)error {
+  OIDEndSessionCallback callback = _pendingEndSessionCallback;
+  _pendingEndSessionCallback = nil;
+  _externalUserAgent = nil;
+  if (callback) {
+    callback(response, error);
+  }
+}
+
+@end
+
+@implementation OIDAuthorizationService
+
++ (void)discoverServiceConfigurationForIssuer:(NSURL *)issuerURL
+                                   completion:(OIDDiscoveryCallback)completion {
+  NSURL *fullDiscoveryURL =
+      [issuerURL URLByAppendingPathComponent:kOpenIDConfigurationWellKnownPath];
+
+  [[self class] discoverServiceConfigurationForDiscoveryURL:fullDiscoveryURL
+                                                 completion:completion];
+}
+
++ (void)discoverServiceConfigurationForDiscoveryURL:(NSURL *)discoveryURL
+    completion:(OIDDiscoveryCallback)completion {
+
+  NSURLSession *session = [OIDURLSessionProvider session];
+  NSURLSessionDataTask *task =
+      [session dataTaskWithURL:discoveryURL
+             completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
+    // If we got any sort of error, just report it.
+    if (error || !data) {
+      NSString *errorDescription =
+          [NSString stringWithFormat:@"Connection error fetching discovery document '%@': %@.",
+                                     discoveryURL,
+                                     error.localizedDescription];
+      error = [OIDErrorUtilities errorWithCode:OIDErrorCodeNetworkError
+                               underlyingError:error
+                                   description:errorDescription];
+      dispatch_async(dispatch_get_main_queue(), ^{
+        completion(nil, error);
+      });
+      return;
+    }
+
+    NSHTTPURLResponse *urlResponse = (NSHTTPURLResponse *)response;
+
+    // Check for non-200 status codes.
+    // https://openid.net/specs/openid-connect-discovery-1_0.html#ProviderConfigurationResponse
+    if (urlResponse.statusCode != 200) {
+      NSError *URLResponseError = [OIDErrorUtilities HTTPErrorWithHTTPResponse:urlResponse
+                                                                          data:data];
+      NSString *errorDescription =
+          [NSString stringWithFormat:@"Non-200 HTTP response (%d) fetching discovery document "
+                                     "'%@'.",
+                                     (int)urlResponse.statusCode,
+                                     discoveryURL];
+      error = [OIDErrorUtilities errorWithCode:OIDErrorCodeNetworkError
+                               underlyingError:URLResponseError
+                                   description:errorDescription];
+      dispatch_async(dispatch_get_main_queue(), ^{
+        completion(nil, error);
+      });
+      return;
+    }
+
+    // Construct an OIDServiceDiscovery with the received JSON.
+    OIDServiceDiscovery *discovery =
+        [[OIDServiceDiscovery alloc] initWithJSONData:data error:&error];
+    if (error || !discovery) {
+      NSString *errorDescription =
+          [NSString stringWithFormat:@"JSON error parsing document at '%@': %@",
+                                     discoveryURL,
+                                     error.localizedDescription];
+      error = [OIDErrorUtilities errorWithCode:OIDErrorCodeNetworkError
+                               underlyingError:error
+                                   description:errorDescription];
+      dispatch_async(dispatch_get_main_queue(), ^{
+        completion(nil, error);
+      });
+      return;
+    }
+
+    // Create our service configuration with the discovery document and return it.
+    OIDServiceConfiguration *configuration =
+        [[OIDServiceConfiguration alloc] initWithDiscoveryDocument:discovery];
+    dispatch_async(dispatch_get_main_queue(), ^{
+      completion(configuration, nil);
+    });
+  }];
+  [task resume];
+}
+
+#pragma mark - Authorization Endpoint
+
++ (id<OIDExternalUserAgentSession>) presentAuthorizationRequest:(OIDAuthorizationRequest *)request
+    externalUserAgent:(id<OIDExternalUserAgent>)externalUserAgent
+             callback:(OIDAuthorizationCallback)callback {
+  
+  AppAuthRequestTrace(@"Authorization Request: %@", request);
+  
+  OIDAuthorizationSession *flowSession = [[OIDAuthorizationSession alloc] initWithRequest:request];
+  [flowSession presentAuthorizationWithExternalUserAgent:externalUserAgent callback:callback];
+  return flowSession;
+}
+
++ (id<OIDExternalUserAgentSession>)
+    presentEndSessionRequest:(OIDEndSessionRequest *)request
+           externalUserAgent:(id<OIDExternalUserAgent>)externalUserAgent
+                    callback:(OIDEndSessionCallback)callback {
+  OIDEndSessionImplementation *flowSession =
+      [[OIDEndSessionImplementation alloc] initWithRequest:request];
+  [flowSession presentAuthorizationWithExternalUserAgent:externalUserAgent callback:callback];
+  return flowSession;
+}
+
+#pragma mark - Token Endpoint
+
++ (void)performTokenRequest:(OIDTokenRequest *)request callback:(OIDTokenCallback)callback {
+  [[self class] performTokenRequest:request
+      originalAuthorizationResponse:nil
+                           callback:callback];
+}
+
++ (void)performTokenRequest:(OIDTokenRequest *)request
+    originalAuthorizationResponse:(OIDAuthorizationResponse *_Nullable)authorizationResponse
+                         callback:(OIDTokenCallback)callback {
+
+  NSURLRequest *URLRequest = [request URLRequest];
+  
+  AppAuthRequestTrace(@"Token Request: %@\nHeaders:%@\nHTTPBody: %@",
+                      URLRequest.URL,
+                      URLRequest.allHTTPHeaderFields,
+                      [[NSString alloc] initWithData:URLRequest.HTTPBody
+                                            encoding:NSUTF8StringEncoding]);
+
+  NSURLSession *session = [OIDURLSessionProvider session];
+  [[session dataTaskWithRequest:URLRequest
+              completionHandler:^(NSData *_Nullable data,
+                                  NSURLResponse *_Nullable response,
+                                  NSError *_Nullable error) {
+    if (error) {
+      // A network error or server error occurred.
+      NSString *errorDescription =
+          [NSString stringWithFormat:@"Connection error making token request to '%@': %@.",
+                                     URLRequest.URL,
+                                     error.localizedDescription];
+      NSError *returnedError =
+          [OIDErrorUtilities errorWithCode:OIDErrorCodeNetworkError
+                           underlyingError:error
+                               description:errorDescription];
+      dispatch_async(dispatch_get_main_queue(), ^{
+        callback(nil, returnedError);
+      });
+      return;
+    }
+
+    NSHTTPURLResponse *HTTPURLResponse = (NSHTTPURLResponse *)response;
+    NSInteger statusCode = HTTPURLResponse.statusCode;
+    AppAuthRequestTrace(@"Token Response: HTTP Status %d\nHTTPBody: %@",
+                        (int)statusCode,
+                        [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);
+    if (statusCode != 200) {
+      // A server error occurred.
+      NSError *serverError =
+          [OIDErrorUtilities HTTPErrorWithHTTPResponse:HTTPURLResponse data:data];
+
+      // HTTP 4xx may indicate an RFC6749 Section 5.2 error response, attempts to parse as such.
+      if (statusCode >= 400 && statusCode < 500) {
+        NSError *jsonDeserializationError;
+        NSDictionary<NSString *, NSObject<NSCopying> *> *json =
+            [NSJSONSerialization JSONObjectWithData:data options:0 error:&jsonDeserializationError];
+
+        // If the HTTP 4xx response parses as JSON and has an 'error' key, it's an OAuth error.
+        // These errors are special as they indicate a problem with the authorization grant.
+        if (json[OIDOAuthErrorFieldError]) {
+          NSError *oauthError =
+            [OIDErrorUtilities OAuthErrorWithDomain:OIDOAuthTokenErrorDomain
+                                      OAuthResponse:json
+                                    underlyingError:serverError];
+          dispatch_async(dispatch_get_main_queue(), ^{
+            callback(nil, oauthError);
+          });
+          return;
+        }
+      }
+
+      // Status code indicates this is an error, but not an RFC6749 Section 5.2 error.
+      NSString *errorDescription =
+          [NSString stringWithFormat:@"Non-200 HTTP response (%d) making token request to '%@'.",
+                                     (int)statusCode,
+                                      URLRequest.URL];
+      NSError *returnedError =
+          [OIDErrorUtilities errorWithCode:OIDErrorCodeServerError
+                           underlyingError:serverError
+                               description:errorDescription];
+      dispatch_async(dispatch_get_main_queue(), ^{
+        callback(nil, returnedError);
+      });
+      return;
+    }
+
+    NSError *jsonDeserializationError;
+    NSDictionary<NSString *, NSObject<NSCopying> *> *json =
+        [NSJSONSerialization JSONObjectWithData:data options:0 error:&jsonDeserializationError];
+    if (jsonDeserializationError) {
+      // A problem occurred deserializing the response/JSON.
+      NSString *errorDescription =
+          [NSString stringWithFormat:@"JSON error parsing token response: %@",
+                                     jsonDeserializationError.localizedDescription];
+      NSError *returnedError =
+          [OIDErrorUtilities errorWithCode:OIDErrorCodeJSONDeserializationError
+                           underlyingError:jsonDeserializationError
+                               description:errorDescription];
+      dispatch_async(dispatch_get_main_queue(), ^{
+        callback(nil, returnedError);
+      });
+      return;
+    }
+
+    OIDTokenResponse *tokenResponse =
+        [[OIDTokenResponse alloc] initWithRequest:request parameters:json];
+    if (!tokenResponse) {
+      // A problem occurred constructing the token response from the JSON.
+      NSError *returnedError =
+          [OIDErrorUtilities errorWithCode:OIDErrorCodeTokenResponseConstructionError
+                           underlyingError:jsonDeserializationError
+                               description:@"Token response invalid."];
+      dispatch_async(dispatch_get_main_queue(), ^{
+        callback(nil, returnedError);
+      });
+      return;
+    }
+
+    // If an ID Token is included in the response, validates the ID Token following the rules
+    // in OpenID Connect Core Section 3.1.3.7 for features that AppAuth directly supports
+    // (which excludes rules #1, #4, #5, #7, #8, #12, and #13). Regarding rule #6, ID Tokens
+    // received by this class are received via direct communication between the Client and the Token
+    // Endpoint, thus we are exercising the option to rely only on the TLS validation. AppAuth
+    // has a zero dependencies policy, and verifying the JWT signature would add a dependency.
+    // Users of the library are welcome to perform the JWT signature verification themselves should
+    // they wish.
+    if (tokenResponse.idToken) {
+      OIDIDToken *idToken = [[OIDIDToken alloc] initWithIDTokenString:tokenResponse.idToken];
+      if (!idToken) {
+        NSError *invalidIDToken =
+          [OIDErrorUtilities errorWithCode:OIDErrorCodeIDTokenParsingError
+                           underlyingError:nil
+                               description:@"ID Token parsing failed"];
+        dispatch_async(dispatch_get_main_queue(), ^{
+          callback(nil, invalidIDToken);
+        });
+        return;
+      }
+      
+      // OpenID Connect Core Section 3.1.3.7. rule #1
+      // Not supported: AppAuth does not support JWT encryption.
+
+      // OpenID Connect Core Section 3.1.3.7. rule #2
+      // Validates that the issuer in the ID Token matches that of the discovery document.
+      NSURL *issuer = tokenResponse.request.configuration.issuer;
+      if (issuer && ![idToken.issuer isEqual:issuer]) {
+        NSError *invalidIDToken =
+          [OIDErrorUtilities errorWithCode:OIDErrorCodeIDTokenFailedValidationError
+                           underlyingError:nil
+                               description:@"Issuer mismatch"];
+        dispatch_async(dispatch_get_main_queue(), ^{
+          callback(nil, invalidIDToken);
+        });
+        return;
+      }
+
+      // OpenID Connect Core Section 3.1.3.7. rule #3 & Section 2 azp Claim
+      // Validates that the aud (audience) Claim contains the client ID, or that the azp
+      // (authorized party) Claim matches the client ID.
+      NSString *clientID = tokenResponse.request.clientID;
+      if (![idToken.audience containsObject:clientID] &&
+          ![idToken.claims[@"azp"] isEqualToString:clientID]) {
+        NSError *invalidIDToken =
+          [OIDErrorUtilities errorWithCode:OIDErrorCodeIDTokenFailedValidationError
+                           underlyingError:nil
+                               description:@"Audience mismatch"];
+        dispatch_async(dispatch_get_main_queue(), ^{
+          callback(nil, invalidIDToken);
+        });
+        return;
+      }
+      
+      // OpenID Connect Core Section 3.1.3.7. rules #4 & #5
+      // Not supported.
+
+      // OpenID Connect Core Section 3.1.3.7. rule #6
+      // As noted above, AppAuth only supports the code flow which results in direct communication
+      // of the ID Token from the Token Endpoint to the Client, and we are exercising the option to
+      // use TSL server validation instead of checking the token signature. Users may additionally
+      // check the token signature should they wish.
+
+      // OpenID Connect Core Section 3.1.3.7. rules #7 & #8
+      // Not applicable. See rule #6.
+
+      // OpenID Connect Core Section 3.1.3.7. rule #9
+      // Validates that the current time is before the expiry time.
+      NSTimeInterval expiresAtDifference = [idToken.expiresAt timeIntervalSinceNow];
+      if (expiresAtDifference < 0) {
+        NSError *invalidIDToken =
+            [OIDErrorUtilities errorWithCode:OIDErrorCodeIDTokenFailedValidationError
+                             underlyingError:nil
+                                 description:@"ID Token expired"];
+        dispatch_async(dispatch_get_main_queue(), ^{
+          callback(nil, invalidIDToken);
+        });
+        return;
+      }
+      
+      // OpenID Connect Core Section 3.1.3.7. rule #10
+      // Validates that the issued at time is not more than +/- 10 minutes on the current time.
+      NSTimeInterval issuedAtDifference = [idToken.issuedAt timeIntervalSinceNow];
+      if (fabs(issuedAtDifference) > kOIDAuthorizationSessionIATMaxSkew) {
+        NSString *message =
+            [NSString stringWithFormat:@"Issued at time is more than %d seconds before or after "
+                                        "the current time",
+                                       kOIDAuthorizationSessionIATMaxSkew];
+        NSError *invalidIDToken =
+          [OIDErrorUtilities errorWithCode:OIDErrorCodeIDTokenFailedValidationError
+                           underlyingError:nil
+                               description:message];
+        dispatch_async(dispatch_get_main_queue(), ^{
+          callback(nil, invalidIDToken);
+        });
+        return;
+      }
+
+      // Only relevant for the authorization_code response type
+      if ([tokenResponse.request.grantType isEqual:OIDGrantTypeAuthorizationCode]) {
+        // OpenID Connect Core Section 3.1.3.7. rule #11
+        // Validates the nonce.
+        NSString *nonce = authorizationResponse.request.nonce;
+        if (nonce && ![idToken.nonce isEqual:nonce]) {
+          NSError *invalidIDToken =
+          [OIDErrorUtilities errorWithCode:OIDErrorCodeIDTokenFailedValidationError
+                           underlyingError:nil
+                               description:@"Nonce mismatch"];
+          dispatch_async(dispatch_get_main_queue(), ^{
+            callback(nil, invalidIDToken);
+          });
+          return;
+        }
+      }
+      
+      // OpenID Connect Core Section 3.1.3.7. rules #12
+      // ACR is not directly supported by AppAuth.
+
+      // OpenID Connect Core Section 3.1.3.7. rules #12
+      // max_age is not directly supported by AppAuth.
+    }
+
+    // Success
+    dispatch_async(dispatch_get_main_queue(), ^{
+      callback(tokenResponse, nil);
+    });
+  }] resume];
+}
+
+
+#pragma mark - Registration Endpoint
+
++ (void)performRegistrationRequest:(OIDRegistrationRequest *)request
+                          completion:(OIDRegistrationCompletion)completion {
+  NSURLRequest *URLRequest = [request URLRequest];
+  if (!URLRequest) {
+    // A problem occurred deserializing the response/JSON.
+    NSError *returnedError = [OIDErrorUtilities errorWithCode:OIDErrorCodeJSONSerializationError
+                                              underlyingError:nil
+                                                  description:@"The registration request could not "
+                                                               "be serialized as JSON."];
+    dispatch_async(dispatch_get_main_queue(), ^{
+      completion(nil, returnedError);
+    });
+    return;
+  }
+
+  NSURLSession *session = [OIDURLSessionProvider session];
+  [[session dataTaskWithRequest:URLRequest
+              completionHandler:^(NSData *_Nullable data,
+                                  NSURLResponse *_Nullable response,
+                                  NSError *_Nullable error) {
+    if (error) {
+      // A network error or server error occurred.
+      NSString *errorDescription =
+          [NSString stringWithFormat:@"Connection error making registration request to '%@': %@.",
+                                     URLRequest.URL,
+                                     error.localizedDescription];
+      NSError *returnedError = [OIDErrorUtilities errorWithCode:OIDErrorCodeNetworkError
+                                                underlyingError:error
+                                                    description:errorDescription];
+      dispatch_async(dispatch_get_main_queue(), ^{
+        completion(nil, returnedError);
+      });
+      return;
+    }
+
+    NSHTTPURLResponse *HTTPURLResponse = (NSHTTPURLResponse *) response;
+
+    if (HTTPURLResponse.statusCode != 201 && HTTPURLResponse.statusCode != 200) {
+      // A server error occurred.
+      NSError *serverError = [OIDErrorUtilities HTTPErrorWithHTTPResponse:HTTPURLResponse
+                                                                     data:data];
+
+      // HTTP 400 may indicate an OpenID Connect Dynamic Client Registration 1.0 Section 3.3 error
+      // response, checks for that
+      if (HTTPURLResponse.statusCode == 400) {
+        NSError *jsonDeserializationError;
+        NSDictionary<NSString *, NSObject <NSCopying> *> *json =
+            [NSJSONSerialization JSONObjectWithData:data options:0 error:&jsonDeserializationError];
+
+        // if the HTTP 400 response parses as JSON and has an 'error' key, it's an OAuth error
+        // these errors are special as they indicate a problem with the authorization grant
+        if (json[OIDOAuthErrorFieldError]) {
+          NSError *oauthError =
+              [OIDErrorUtilities OAuthErrorWithDomain:OIDOAuthRegistrationErrorDomain
+                                        OAuthResponse:json
+                                      underlyingError:serverError];
+          dispatch_async(dispatch_get_main_queue(), ^{
+            completion(nil, oauthError);
+          });
+          return;
+        }
+      }
+
+      // not an OAuth error, just a generic server error
+      NSString *errorDescription =
+          [NSString stringWithFormat:@"Non-200/201 HTTP response (%d) making registration request "
+                                     "to '%@'.",
+                                     (int)HTTPURLResponse.statusCode,
+                                     URLRequest.URL];
+      NSError *returnedError = [OIDErrorUtilities errorWithCode:OIDErrorCodeServerError
+                                                underlyingError:serverError
+                                                    description:errorDescription];
+      dispatch_async(dispatch_get_main_queue(), ^{
+        completion(nil, returnedError);
+      });
+      return;
+    }
+
+    NSError *jsonDeserializationError;
+    NSDictionary<NSString *, NSObject <NSCopying> *> *json =
+        [NSJSONSerialization JSONObjectWithData:data options:0 error:&jsonDeserializationError];
+    if (jsonDeserializationError) {
+      // A problem occurred deserializing the response/JSON.
+      NSString *errorDescription =
+          [NSString stringWithFormat:@"JSON error parsing registration response: %@",
+                                     jsonDeserializationError.localizedDescription];
+      NSError *returnedError = [OIDErrorUtilities errorWithCode:OIDErrorCodeJSONDeserializationError
+                                                underlyingError:jsonDeserializationError
+                                                    description:errorDescription];
+      dispatch_async(dispatch_get_main_queue(), ^{
+        completion(nil, returnedError);
+      });
+      return;
+    }
+
+    OIDRegistrationResponse *registrationResponse =
+        [[OIDRegistrationResponse alloc] initWithRequest:request
+                                              parameters:json];
+    if (!registrationResponse) {
+      // A problem occurred constructing the registration response from the JSON.
+      NSError *returnedError =
+          [OIDErrorUtilities errorWithCode:OIDErrorCodeRegistrationResponseConstructionError
+                           underlyingError:nil
+                               description:@"Registration response invalid."];
+      dispatch_async(dispatch_get_main_queue(), ^{
+        completion(nil, returnedError);
+      });
+      return;
+    }
+
+    // Success
+    dispatch_async(dispatch_get_main_queue(), ^{
+      completion(registrationResponse, nil);
+    });
+  }] resume];
+}
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/AppAuth/Source/AppAuthCore/OIDClientMetadataParameters.h

@@ -0,0 +1,51 @@
+/*! @file OIDClientMetadataParameters.h
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2016 The AppAuth for iOS Authors. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/*! @brief Parameter name for the token endpoint authentication method.
+ */
+extern NSString *const OIDTokenEndpointAuthenticationMethodParam;
+
+/*! @brief Parameter name for the application type.
+ */
+extern NSString *const OIDApplicationTypeParam;
+
+/*! @brief Parameter name for the redirect URI values.
+ */
+extern NSString *const OIDRedirectURIsParam;
+
+/*! @brief Parameter name for the response type values.
+ */
+extern NSString *const OIDResponseTypesParam;
+
+/*! @brief Parameter name for the grant type values.
+ */
+extern NSString *const OIDGrantTypesParam;
+
+/*! @brief Parameter name for the subject type.
+ */
+extern NSString *const OIDSubjectTypeParam;
+
+/*! @brief Application type that indicates this client is a native (not a web) application.
+ */
+extern NSString *const OIDApplicationTypeNative;
+
+NS_ASSUME_NONNULL_END

Pods/AppAuth/Source/AppAuthCore/OIDClientMetadataParameters.m

@@ -0,0 +1,33 @@
+/*! @file OIDClientMetadataParameters.h
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2016 The AppAuth for iOS Authors. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import "OIDClientMetadataParameters.h"
+
+NSString *const OIDTokenEndpointAuthenticationMethodParam = @"token_endpoint_auth_method";
+
+NSString *const OIDApplicationTypeParam = @"application_type";
+
+NSString *const OIDRedirectURIsParam = @"redirect_uris";
+
+NSString *const OIDResponseTypesParam = @"response_types";
+
+NSString *const OIDGrantTypesParam = @"grant_types";
+
+NSString *const OIDSubjectTypeParam = @"subject_type";
+
+NSString *const OIDApplicationTypeNative = @"native";

Pods/AppAuth/Source/AppAuthCore/OIDDefines.h

@@ -0,0 +1,51 @@
+/*! @file OIDDefines.h
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2015 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+/*! @def OIDIsEqualIncludingNil(x, y)
+    @brief Returns YES if x and y are equal by reference or value.
+    @discussion NOTE: parameters may be evaluated multiple times. Be careful if using this check
+        with expressions - especially if the expressions have side effects.
+    @param x An object.
+    @param y An object.
+ */
+#define OIDIsEqualIncludingNil(x, y) (((x) == (y)) || [(x) isEqual:(y)])
+
+/*! @def OID_UNAVAILABLE_USE_INITIALIZER(designatedInitializer)
+    @brief Provides a template implementation for init-family methods which have been marked as
+        NS_UNAVILABLE. Stops the compiler from giving a warning when it's the super class'
+        designated initializer, and gives callers useful feedback telling them what the
+        new designated initializer is.
+    @remarks Takes a SEL as a parameter instead of a string so that we get compiler warnings if the
+        designated intializer's signature changes.
+    @param designatedInitializer A SEL referencing the designated initializer.
+ */
+#define OID_UNAVAILABLE_USE_INITIALIZER(designatedInitializer) { \
+  NSString *reason = [NSString stringWithFormat:@"Called: %@\nDesignated Initializer:%@", \
+                                                NSStringFromSelector(_cmd), \
+                                                NSStringFromSelector(designatedInitializer)]; \
+  @throw [NSException exceptionWithName:@"Attempt to call unavailable initializer." \
+                                 reason:reason \
+                               userInfo:nil]; \
+}
+
+#ifdef _APPAUTHTRACE
+#   define AppAuthRequestTrace(fmt, ...) NSLog(fmt, ##__VA_ARGS__);
+#else // _APPAUTHTRACE
+#   define AppAuthRequestTrace(...)
+#endif // _APPAUTHTRACE
+

Pods/AppAuth/Source/AppAuthCore/OIDEndSessionRequest.h

@@ -0,0 +1,107 @@
+/*! @file OIDEndSessionRequest.h
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2017 The AppAuth Authors. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+ 
+        http://www.apache.org/licenses/LICENSE-2.0
+ 
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+#import "OIDExternalUserAgentRequest.h"
+
+@class OIDServiceConfiguration;
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface OIDEndSessionRequest : NSObject
+    <NSCopying, NSSecureCoding, OIDExternalUserAgentRequest>
+
+/*! @brief The service's configuration.
+    @remarks This configuration specifies how to connect to a particular OAuth provider.
+        Configurations may be created manually, or via an OpenID Connect Discovery Document.
+ */
+@property(nonatomic, readonly) OIDServiceConfiguration *configuration;
+
+/*! @brief The client's redirect URI.
+    @remarks post_logout_redirect_uri
+    @see http://openid.net/specs/openid-connect-session-1_0.html#RPLogout
+ */
+@property(nonatomic, readonly, nullable) NSURL *postLogoutRedirectURL;
+
+/*! @brief Previously issued ID Token passed to the end session endpoint as a hint about the End-User's current authenticated
+        session with the Client
+    @remarks id_token_hint
+    @see http://openid.net/specs/openid-connect-session-1_0.html#RPLogout
+ */
+@property(nonatomic, readonly, nullable) NSString *idTokenHint;
+
+/*! @brief An opaque value used by the client to maintain state between the request and callback.
+    @remarks state
+    @discussion If this value is not explicitly set, this library will automatically add state and
+        perform appropriate validation of the state in the authorization response. It is recommended
+        that the default implementation of this parameter be used wherever possible. Typically used
+        to prevent CSRF attacks, as recommended in RFC6819 Section 5.3.5.
+    @see http://openid.net/specs/openid-connect-session-1_0.html#RPLogout
+ */
+@property(nonatomic, readonly, nullable) NSString *state;
+
+/*! @brief The client's additional authorization parameters.
+    @see https://tools.ietf.org/html/rfc6749#section-3.1
+ */
+@property(nonatomic, readonly, nullable) NSDictionary<NSString *, NSString *> *additionalParameters;
+
+/*! @internal
+    @brief Unavailable. Please use @c initWithConfiguration:clientId:scopes:redirectURL:additionalParameters:.
+ */
+- (instancetype)init NS_UNAVAILABLE;
+
+/*! @brief Creates an authorization request with opinionated defaults (a secure @c state).
+    @param configuration The service's configuration.
+    @param idTokenHint The previously issued ID Token
+    @param postLogoutRedirectURL The client's post-logout redirect URI.
+        callback.
+    @param additionalParameters The client's additional authorization parameters.
+*/
+- (instancetype)
+    initWithConfiguration:(OIDServiceConfiguration *)configuration
+              idTokenHint:(NSString *)idTokenHint
+    postLogoutRedirectURL:(NSURL *)postLogoutRedirectURL
+     additionalParameters:(nullable NSDictionary<NSString *, NSString *> *)additionalParameters;
+
+/*! @brief Designated initializer.
+    @param configuration The service's configuration.
+    @param idTokenHint The previously issued ID Token
+    @param postLogoutRedirectURL The client's post-logout redirect URI.
+    @param state An opaque value used by the client to maintain state between the request and
+        callback.
+    @param additionalParameters The client's additional authorization parameters.
+ */
+- (instancetype)
+    initWithConfiguration:(OIDServiceConfiguration *)configuration
+              idTokenHint:(NSString *)idTokenHint
+    postLogoutRedirectURL:(NSURL *)postLogoutRedirectURL
+                    state:(NSString *)state
+     additionalParameters:(nullable NSDictionary<NSString *, NSString *> *)additionalParameters
+    NS_DESIGNATED_INITIALIZER;
+
+/*! @brief Constructs the request URI by adding the request parameters to the query component of the
+        authorization endpoint URI using the "application/x-www-form-urlencoded" format.
+    @return A URL representing the authorization request.
+    @see http://openid.net/specs/openid-connect-session-1_0.html#RPLogout
+ */
+- (NSURL *)endSessionRequestURL;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/AppAuth/Source/AppAuthCore/OIDEndSessionRequest.m

@@ -0,0 +1,190 @@
+/*! @file OIDEndSessionRequest.m
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2017 The AppAuth Authors. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+ 
+        http://www.apache.org/licenses/LICENSE-2.0
+ 
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import "OIDEndSessionRequest.h"
+
+#import "OIDDefines.h"
+#import "OIDTokenUtilities.h"
+#import "OIDServiceConfiguration.h"
+#import "OIDServiceDiscovery.h"
+#import "OIDURLQueryComponent.h"
+
+/*! @brief The key for the @c configuration property for @c NSSecureCoding
+ */
+static NSString *const kConfigurationKey = @"configuration";
+
+/*! @brief Key used to encode the @c state property for @c NSSecureCoding, and on the URL request.
+ */
+static NSString *const kStateKey = @"state";
+
+/*! @brief Key used to encode the @c postLogoutRedirectURL property for @c NSSecureCoding, and on the URL request.
+ */
+static NSString *const kPostLogoutRedirectURLKey = @"post_logout_redirect_uri";
+
+/*! @brief Key used to encode the @c idTokenHint property for @c NSSecureCoding, and on the URL request.
+ */
+static NSString *const kIdTokenHintKey = @"id_token_hint";
+
+/*! @brief Key used to encode the @c additionalParameters property for @c NSSecureCoding
+ */
+static NSString *const kAdditionalParametersKey = @"additionalParameters";
+
+/*! @brief Number of random bytes generated for the @state.
+ */
+static NSUInteger const kStateSizeBytes = 32;
+
+/*! @brief Assertion text for missing end_session_endpoint.
+ */
+static NSString *const OIDMissingEndSessionEndpointMessage =
+@"The service configuration is missing an end_session_endpoint.";
+
+@implementation OIDEndSessionRequest
+
+- (instancetype)init
+    OID_UNAVAILABLE_USE_INITIALIZER(
+        @selector(initWithConfiguration:
+                            idTokenHint:
+                  postLogoutRedirectURL:
+                   additionalParameters:)
+    )
+
+- (instancetype)initWithConfiguration:(OIDServiceConfiguration *)configuration
+                          idTokenHint:(NSString *)idTokenHint
+                postLogoutRedirectURL:(NSURL *)postLogoutRedirectURL
+                                state:(NSString *)state
+                 additionalParameters:(NSDictionary<NSString *,NSString *> *)additionalParameters
+{
+  self = [super init];
+  if (self) {
+      _configuration = [configuration copy];
+      _idTokenHint = [idTokenHint copy];
+      _postLogoutRedirectURL = [postLogoutRedirectURL copy];
+      _state = [state copy];
+      _additionalParameters =
+          [[NSDictionary alloc] initWithDictionary:additionalParameters copyItems:YES];
+  }
+  return self;
+}
+
+- (instancetype)initWithConfiguration:(OIDServiceConfiguration *)configuration
+                          idTokenHint:(NSString *)idTokenHint
+                postLogoutRedirectURL:(NSURL *)postLogoutRedirectURL
+                 additionalParameters:(NSDictionary<NSString *,NSString *> *)additionalParameters
+{
+  return [self initWithConfiguration:configuration
+                         idTokenHint:idTokenHint
+               postLogoutRedirectURL:postLogoutRedirectURL
+                               state:[[self class] generateState]
+                additionalParameters:additionalParameters];
+}
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(nullable NSZone *)zone {
+  // The documentation for NSCopying specifically advises us to return a reference to the original
+  // instance in the case where instances are immutable (as ours is):
+  // "Implement NSCopying by retaining the original instead of creating a new copy when the class
+  // and its contents are immutable."
+  return self;
+}
+
+#pragma mark - NSSecureCoding
+
++ (BOOL)supportsSecureCoding {
+  return YES;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
+  OIDServiceConfiguration *configuration = [aDecoder decodeObjectOfClass:[OIDServiceConfiguration class] forKey:kConfigurationKey];
+
+  NSString *idTokenHint = [aDecoder decodeObjectOfClass:[NSString class] forKey:kIdTokenHintKey];
+  NSURL *postLogoutRedirectURL = [aDecoder decodeObjectOfClass:[NSURL class] forKey:kPostLogoutRedirectURLKey];
+  NSString *state = [aDecoder decodeObjectOfClass:[NSString class] forKey:kStateKey];
+  NSSet *additionalParameterCodingClasses = [NSSet setWithArray:@[
+                                                                  [NSDictionary class],
+                                                                  [NSString class]
+                                                                  ]];
+  NSDictionary *additionalParameters = [aDecoder decodeObjectOfClasses:additionalParameterCodingClasses
+                           forKey:kAdditionalParametersKey];
+
+  self = [self initWithConfiguration:configuration
+                         idTokenHint:idTokenHint
+               postLogoutRedirectURL:postLogoutRedirectURL
+                               state:state
+                additionalParameters:additionalParameters];
+  return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)aCoder {
+  [aCoder encodeObject:_configuration forKey:kConfigurationKey];
+  [aCoder encodeObject:_idTokenHint forKey:kIdTokenHintKey];
+  [aCoder encodeObject:_postLogoutRedirectURL forKey:kPostLogoutRedirectURLKey];
+  [aCoder encodeObject:_state forKey:kStateKey];
+  [aCoder encodeObject:_additionalParameters forKey:kAdditionalParametersKey];
+}
+
+#pragma mark - NSObject overrides
+
+- (NSString *)description {
+  return [NSString stringWithFormat:@"<%@: %p, request: %@>",
+          NSStringFromClass([self class]),
+          (void *)self,
+          self.endSessionRequestURL];
+}
+
++ (nullable NSString *)generateState {
+  return [OIDTokenUtilities randomURLSafeStringWithSize:kStateSizeBytes];
+}
+
+#pragma mark - OIDExternalUserAgentRequest
+
+- (NSURL*)externalUserAgentRequestURL {
+  return [self endSessionRequestURL];
+}
+
+- (NSString *)redirectScheme {
+  return [_postLogoutRedirectURL scheme];
+}
+
+#pragma mark -
+
+- (NSURL *)endSessionRequestURL {
+  OIDURLQueryComponent *query = [[OIDURLQueryComponent alloc] init];
+
+  // Add any additional parameters the client has specified.
+  [query addParameters:_additionalParameters];
+
+  // Add optional parameters, as applicable.
+  if (_idTokenHint) {
+    [query addParameter:kIdTokenHintKey value:_idTokenHint];
+  }
+
+  if (_postLogoutRedirectURL) {
+    [query addParameter:kPostLogoutRedirectURLKey value:_postLogoutRedirectURL.absoluteString];
+  }
+
+  if (_state) {
+    [query addParameter:kStateKey value:_state];
+  }
+
+  NSAssert(_configuration.endSessionEndpoint, OIDMissingEndSessionEndpointMessage);
+
+  // Construct the URL
+  return [query URLByReplacingQueryInURL:_configuration.endSessionEndpoint];
+}
+
+@end

Pods/AppAuth/Source/AppAuthCore/OIDEndSessionResponse.h

@@ -0,0 +1,64 @@
+/*! @file OIDEndSessionResponse.h
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2017 The AppAuth Authors. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+ 
+        http://www.apache.org/licenses/LICENSE-2.0
+ 
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@class OIDEndSessionRequest;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/*! @brief Represents the response to an End Session request.
+    @see http://openid.net/specs/openid-connect-session-1_0.html#RPLogout
+ */
+
+@interface OIDEndSessionResponse : NSObject <NSCopying, NSSecureCoding>
+
+/*! @brief The request which was serviced.
+ */
+@property(nonatomic, readonly) OIDEndSessionRequest *request;
+
+/*! @brief REQUIRED if the "state" parameter was present in the client end-session request. The
+        exact value received from the client.
+    @remarks state
+ */
+@property(nonatomic, readonly, nullable) NSString *state;
+
+/*! @brief Additional parameters returned from the end session endpoint.
+ */
+@property(nonatomic, readonly, nullable)
+    NSDictionary<NSString *, NSObject<NSCopying> *> *additionalParameters;
+
+/*! @internal
+    @brief Unavailable. Please use initWithParameters:.
+ */
+- (instancetype)init NS_UNAVAILABLE;
+
+/*! @brief Designated initializer.
+    @param request The serviced request.
+    @param parameters The decoded parameters returned from the End Session Endpoint.
+    @remarks Known parameters are extracted from the @c parameters parameter and the normative
+        properties are populated. Non-normative parameters are placed in the
+        @c #additionalParameters dictionary.
+ */
+- (instancetype)initWithRequest:(OIDEndSessionRequest *)request
+                     parameters:(NSDictionary<NSString *, NSObject<NSCopying> *> *)parameters
+    NS_DESIGNATED_INITIALIZER;
+
+@end
+
+NS_ASSUME_NONNULL_END