newsupernova/vendor/magento/module-catalog-search/Setup/Patch/Data/MySQLSearchDeprecationNotification.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
declare(strict_types=1);

namespace Magento\CatalogSearch\Setup\Patch\Data;

/**
 * Implementation of the notification about MySQL search being deprecated.
 *
 * @deprecated 101.0.0
 * @see \Magento\ElasticSearch
 */
class MySQLSearchDeprecationNotification implements \Magento\Framework\Setup\Patch\DataPatchInterface
{
    /**
     * @var \Magento\Framework\Search\EngineResolverInterface
     */
    private $searchEngineResolver;

    /**
     * @var \Magento\Framework\Notification\NotifierInterface
     */
    private $notifier;

    /**
     * @param \Magento\Framework\Search\EngineResolverInterface $searchEngineResolver
     * @param \Magento\Framework\Notification\NotifierInterface $notifier
     */
    public function __construct(
        \Magento\Framework\Search\EngineResolverInterface $searchEngineResolver,
        \Magento\Framework\Notification\NotifierInterface $notifier
    ) {
        $this->searchEngineResolver = $searchEngineResolver;
        $this->notifier = $notifier;
    }

    /**
     * @inheritdoc
     */
    public function apply()
    {
        if ($this->searchEngineResolver->getCurrentSearchEngine() === 'mysql') {
            $message = <<<MESSAGE
Catalog Search is currently configured to use the MySQL engine, which has been deprecated. Consider migrating to one of
the Elasticsearch engines now to ensure there are no service interruptions during your next upgrade.
MESSAGE;

            $this->notifier->addNotice(__('Deprecation Notice'), __($message));
        }
    }

    /**
     * @inheritdoc
     */
    public function getAliases()
    {
        return [];
    }

    /**
     * @inheritdoc
     */
    public static function getDependencies()
    {
        return [];
    }
}