WP_REST_Pattern_Directory_Controller::get_items( WP_REST_Request $request ): WP_REST_Response|WP_Error

Source

public function get_items( $request ) {
	/*
	 * Include an unmodified `$wp_version`, so the API can craft a response that's tailored to
	 * it. Some plugins modify the version in a misguided attempt to improve security by
	 * obscuring the version, which can cause invalid requests.
	 */
	require ABSPATH . WPINC . '/version.php';

	$valid_query_args = array(
		'offset'   => true,
		'order'    => true,
		'orderby'  => true,
		'page'     => true,
		'per_page' => true,
		'search'   => true,
		'slug'     => true,
	);
	$query_args       = array_intersect_key( $request->get_params(), $valid_query_args );

	$query_args['locale']             = get_user_locale();
	$query_args['wp-version']         = $wp_version;
	$query_args['pattern-categories'] = isset( $request['category'] ) ? $request['category'] : false;
	$query_args['pattern-keywords']   = isset( $request['keyword'] ) ? $request['keyword'] : false;

	$query_args = array_filter( $query_args );

	$transient_key = $this->get_transient_key( $query_args );

	/*
	 * Use network-wide transient to improve performance. The locale is the only site
	 * configuration that affects the response, and it's included in the transient key.
	 */
	$raw_patterns = get_site_transient( $transient_key );

	if ( ! $raw_patterns ) {
		$api_url = 'https://api.wordpress.org/patterns/1.0/?' . build_query( $query_args );
		if ( wp_http_supports( array( 'ssl' ) ) ) {
			$api_url = set_url_scheme( $api_url, 'https' );
		}

		/*
		 * Default to a short TTL, to mitigate cache stampedes on high-traffic sites.
		 * This assumes that most errors will be short-lived, e.g., packet loss that causes the
		 * first request to fail, but a follow-up one will succeed. The value should be high
		 * enough to avoid stampedes, but low enough to not interfere with users manually
		 * re-trying a failed request.
		 */
		$cache_ttl      = 5;
		$wporg_response = wp_remote_get( $api_url );
		$raw_patterns   = json_decode( wp_remote_retrieve_body( $wporg_response ) );

		if ( is_wp_error( $wporg_response ) ) {
			$raw_patterns = $wporg_response;

		} elseif ( ! is_array( $raw_patterns ) ) {
			// HTTP request succeeded, but response data is invalid.
			$raw_patterns = new WP_Error(
				'pattern_api_failed',
				sprintf(
					/* translators: %s: Support forums URL. */
					__( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
					__( 'https://wordpress.org/support/forums/' )
				),
				array(
					'response' => wp_remote_retrieve_body( $wporg_response ),
				)
			);

		} else {
			// Response has valid data.
			$cache_ttl = HOUR_IN_SECONDS;
		}

		set_site_transient( $transient_key, $raw_patterns, $cache_ttl );
	}

	if ( is_wp_error( $raw_patterns ) ) {
		$raw_patterns->add_data( array( 'status' => 500 ) );

		return $raw_patterns;
	}

	$response = array();

	if ( $raw_patterns ) {
		foreach ( $raw_patterns as $pattern ) {
			$response[] = $this->prepare_response_for_collection(
				$this->prepare_item_for_response( $pattern, $request )
			);
		}
	}

	return new WP_REST_Response( $response );
}

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