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<?php

/**
 * Check if any plugins that could conflict with LiteSpeed Cache are active.
 *
 * @since       4.7
 */

namespace LiteSpeed\Thirdparty;

defined('WPINC') || exit();

class LiteSpeed_Check {

	public static $_incompatible_plugins = array(
		// 'autoptimize/autoptimize.php',
		'breeze/breeze.php',
		'cache-enabler/cache-enabler.php',
		'cachify/cachify.php',
		'cloudflare/cloudflare.php',
		'comet-cache/comet-cache.php',
		'docket-cache/docket-cache.php',
		'fast-velocity-minify/fvm.php',
		'hummingbird-performance/wp-hummingbird.php',
		'nginx-cache/nginx-cache.php',
		'nitropack/main.php',
		'pantheon-advanced-page-cache/pantheon-advanced-page-cache.php',
		'powered-cache/powered-cache.php',
		'psn-pagespeed-ninja/pagespeedninja.php',
		'sg-cachepress/sg-cachepress.php',
		'simple-cache/simple-cache.php',
		// 'redis-cache/redis-cache.php',
		'w3-total-cache/w3-total-cache.php',
		'wp-cloudflare-page-cache/wp-cloudflare-page-cache.php',
		'wp-fastest-cache/wpFastestCache.php',
		'wp-meteor/wp-meteor.php',
		'wp-optimize/wp-optimize.php',
		'wp-performance-score-booster/wp-performance-score-booster.php',
		'wp-rocket/wp-rocket.php',
		'wp-super-cache/wp-cache.php',
	);

	private static $_option = 'thirdparty_litespeed_check';
	private static $_msg_id = 'id="lscwp-incompatible-plugin-notice"';

	public static function detect() {
		if (!is_admin()) {
			return;
		}

		/**
		 * Check for incompatible plugins when `litespeed-cache` is first activated.
		 */
		$plugin = basename(LSCWP_DIR) . '/litespeed-cache.php';
		register_deactivation_hook($plugin, function ( $_network_wide ) {
			\LiteSpeed\Admin_Display::delete_option(self::$_option);
		});
		if (!\LiteSpeed\Admin_Display::get_option(self::$_option)) {
			self::activated_plugin($plugin, null);
			\LiteSpeed\Admin_Display::add_option(self::$_option, true);
		}

		/**
		 * Check for incompatible plugins when any plugin is (de)activated.
		 */
		add_action('activated_plugin', __CLASS__ . '::activated_plugin', 10, 2);
		add_action('deactivated_plugin', __CLASS__ . '::deactivated_plugin', 10, 2);

		if (class_exists('PagespeedNinja')) {
			\LiteSpeed\Admin_Display::error(
				'<div ' .
					self::$_msg_id .
					'>' .
					__('Please consider disabling the following detected plugins, as they may conflict with LiteSpeed Cache:', 'litespeed-cache') .
					'<p style="color: red; font-weight: 700;">' .
					'PageSpeed Ninja' .
					'</p>' .
					'</div>'
			);
		}
	}

	public static function activated_plugin( $plugin, $network_wide ) {
		self::incompatible_plugin_notice($plugin, $network_wide, 'activated');
	}

	public static function deactivated_plugin( $plugin, $network_wide ) {
		self::incompatible_plugin_notice($plugin, $network_wide, 'deactivated');
	}

	/**
	 * Detect any incompatible plugins that are currently `active` and `valid`.
	 * Show a notification if there are any.
	 */
	public static function incompatible_plugin_notice( $plugin, $_network_wide, $action ) {
		self::update_messages();

		/**
		 * The 'deactivated_plugin' action fires before
		 * `wp_get_active_and_valid_plugins` can see the change, so we'll need to
		 * remove `$plugin` from the list.
		 */
		$deactivated = 'deactivated' === $action ? array( $plugin ) : array();

		$incompatible_plugins = array_map(function ( $plugin ) {
			return WP_PLUGIN_DIR . '/' . $plugin;
		}, array_diff(self::$_incompatible_plugins, $deactivated));

		$active_incompatible_plugins = array_map(function ( $plugin ) {
			$plugin = get_plugin_data($plugin, false, true);
			return $plugin['Name'];
		}, array_intersect($incompatible_plugins, wp_get_active_and_valid_plugins()));

		if (empty($active_incompatible_plugins)) {
			return;
		}

		\LiteSpeed\Admin_Display::error(
			'<div ' .
				self::$_msg_id .
				'>' .
				__('Please consider disabling the following detected plugins, as they may conflict with LiteSpeed Cache:', 'litespeed-cache') .
				'<p style="color: red; font-weight: 700;">' .
				implode(', ', $active_incompatible_plugins) .
				'</p>' .
				'</div>',
			false,
			true
		);
	}

	/**
	 * Prevent multiple incompatible plugin notices, in case an admin (de)activates
	 * a number of incompatible plugins in succession without dismissing the
	 * notice(s).
	 */
	private static function update_messages() {
		$messages = \LiteSpeed\Admin_Display::get_option(\LiteSpeed\Admin_Display::DB_MSG_PIN, array());
		if (is_array($messages)) {
			foreach ($messages as $index => $message) {
				if (strpos($message, self::$_msg_id) !== false) {
					unset($messages[$index]);
					if (!$messages) {
						$messages = -1;
					}
					\LiteSpeed\Admin_Display::update_option(\LiteSpeed\Admin_Display::DB_MSG_PIN, $messages);
					break;
				}
			}
		}
	}
}