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<?php

namespace WP_Rocket\ThirdParty\Plugins\I18n;

use WP_Rocket\Event_Management\Subscriber_Interface;
use WP_Filesystem_Direct;
use WP_Rocket\ThirdParty\ReturnTypesTrait;

/**
 * Subscriber for compatibility with WPML.
 */
class WPML implements Subscriber_Interface {
	use ReturnTypesTrait;

	/**
	 * Filesystem instance.
	 *
	 * @var WP_Filesystem_Direct
	 */
	protected $filesystem;

	/**
	 * Instantiate class.
	 *
	 * @param WP_Filesystem_Direct $filesystem Filesystem instance.
	 */
	public function __construct( WP_Filesystem_Direct $filesystem = null ) {
		$this->filesystem = ! empty( $filesystem ) ? $filesystem : rocket_direct_filesystem();
	}

	/**
	 * Events for subscriber to listen to.
	 *
	 * @return array
	 */
	public static function get_subscribed_events() {

		$events = [
			'activate_sitepress-multilingual-cms/sitepress.php' => 'maybe_clear_on_disable',
			'deactivate_sitepress-multilingual-cms/sitepress.php' => 'maybe_clear_on_disable',
		];

		if ( ! defined( 'ICL_SITEPRESS_VERSION' ) ) {
			return $events;
		}

		$events['rocket_rucss_is_home_url']                 = [ 'is_secondary_home', 10, 2 ];
		$events['rocket_preload_all_to_pending_condition']  = 'clean_only_right_domain';
		$events['rocket_preload_sitemap_before_queue']      = 'add_languages_sitemaps';
		$events['after_rocket_clean_home']                  = 'remove_root_cached_files';
		$events['rocket_after_clean_domain']                = 'remove_root_cached_files';
		$events['pre_update_option_icl_sitepress_settings'] = [ 'on_change_directory_for_default_language_clean_cache', 10, 2 ];

		return $events;
	}

	/**
	 * Checks if page to be processed is secondary homepage.
	 *
	 * @param string $home_url home url.
	 * @param string $url url of current page.
	 * @return string
	 */
	public function is_secondary_home( string $home_url, string $url ): string {
		global $sitepress;

		// Get active languages on site.
		$languages = $sitepress->get_active_languages();

		foreach ( $languages as $lang ) {
			$lang_url = $sitepress->language_url( $lang['code'] );

			// Check if current url is a secondary homepage.
			if ( untrailingslashit( $lang_url ) !== $url ) {
				continue;
			}

			return $url;
		}

		return $home_url;
	}

	/**
	 * Add a condition to clean only urls from the domain when it is the case.
	 *
	 * @param string $condition condition used to clean URLS in the database.
	 * @return string
	 */
	public function clean_only_right_domain( $condition ) {
		global $sitepress;

		$lang = isset( $_GET['lang'] ) && 'all' !== $_GET['lang'] ? sanitize_key( $_GET['lang'] ) : '';// phpcs:ignore WordPress.Security.NonceVerification.Recommended
		if ( ! $lang ) {
			return $condition;
		}

		$lang_url = $sitepress->language_url( $lang );

		return ' WHERE url LIKE "' . $lang_url . '%"';
	}

	/**
	 * Add sitemaps from translations.
	 *
	 * @param array $sitemaps list of sitemaps to be fetched.
	 * @return array
	 */
	public function add_languages_sitemaps( $sitemaps ) {
			global $sitepress;

			$new_sitemaps = [];

			// Get active languages on site.
			$languages = $sitepress->get_active_languages();

			$base_url = home_url();
		foreach ( $sitemaps as $sitemap ) {
			$new_sitemaps[] = $sitemap;
			foreach ( $languages as $lang ) {
				$lang_url       = $sitepress->language_url( $lang['code'] );
				$new_sitemaps[] = str_replace( $base_url, $lang_url, $sitemap );
			}
		}
		return array_unique( $new_sitemaps );
	}

	/**
	 * Remove root files when WPML is active.
	 *
	 * @return void
	 */
	public function remove_root_cached_files() {
		$site_url               = home_url();
		$host_name              = wp_parse_url( $site_url, PHP_URL_HOST );
		$cache_folder_path      = _rocket_get_wp_rocket_cache_path() . $host_name . '/';
		$cache_folder_directory = $this->filesystem->dirlist( $cache_folder_path );

		if ( ! is_array( $cache_folder_directory ) || ! is_array( array_keys( $cache_folder_directory ) ) ) {
			return;
		}

		foreach ( array_keys( $cache_folder_directory ) as $entry ) {
			if ( $this->filesystem->is_dir( $cache_folder_path . $entry ) ) {
				continue;
			}
			$this->filesystem->delete( $cache_folder_path . $entry );
		}
	}

	/**
	 * Reset cache when changing the option.
	 *
	 * @param array $new new configurations.
	 * @param array $old old configurations.
	 *
	 * @return array
	 */
	public function on_change_directory_for_default_language_clean_cache( $new, $old ) { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.newFound
		if ( ! is_array( $old ) || ! is_array( $new ) ) {
			return $new;
		}

		if ( ! key_exists( 'urls', $old ) || ! key_exists( 'directory_for_default_language', $old['urls'] ) || ! key_exists( 'urls', $new ) || ! key_exists( 'directory_for_default_language', $new['urls'] ) || $new['urls']['directory_for_default_language'] === $old['urls']['directory_for_default_language'] ) {
			return $new;
		}

		/**
		 * Reset WP Rocket Preload.
		 */
		do_action( 'rocket_reset_preload' );
		rocket_clean_domain();

		return $new;
	}

	/**
	 * Clear the cache when the option language directory is enabled.
	 *
	 * @return void
	 */
	public function maybe_clear_on_disable() {
		$option = get_option( 'icl_sitepress_settings' );
		if ( ! $option || ! is_array( $option ) || ! key_exists( 'urls', $option ) || ! key_exists( 'directory_for_default_language', $option['urls'] ) || false === $option['urls']['directory_for_default_language'] ) {
			return;
		}

		/**
		 * Reset WP Rocket Preload.
		 */
		do_action( 'rocket_reset_preload' );
		rocket_clean_cache_dir();
		rocket_clean_domain();
	}
}