345 lines
10 KiB
PHP
345 lines
10 KiB
PHP
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<?php
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/**
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* Block Pattern Directory REST API: WP_REST_Pattern_Directory_Controller class
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*
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* @package WordPress
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* @subpackage REST_API
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* @since 5.8.0
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*/
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/**
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* Controller which provides REST endpoint for block patterns.
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*
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* This simply proxies the endpoint at http://api.wordpress.org/patterns/1.0/. That isn't necessary for
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* functionality, but is desired for privacy. It prevents api.wordpress.org from knowing the user's IP address.
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*
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* @since 5.8.0
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*
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* @see WP_REST_Controller
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*/
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class WP_REST_Pattern_Directory_Controller extends WP_REST_Controller {
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/**
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* Constructs the controller.
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*
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* @since 5.8.0
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*/
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public function __construct() {
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$this->namespace = 'wp/v2';
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$this->rest_base = 'pattern-directory';
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}
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/**
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* Registers the necessary REST API routes.
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*
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* @since 5.8.0
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*/
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public function register_routes() {
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register_rest_route(
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$this->namespace,
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'/' . $this->rest_base . '/patterns',
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array(
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array(
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'methods' => WP_REST_Server::READABLE,
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'callback' => array( $this, 'get_items' ),
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'permission_callback' => array( $this, 'get_items_permissions_check' ),
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'args' => $this->get_collection_params(),
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),
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'schema' => array( $this, 'get_public_item_schema' ),
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)
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);
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}
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/**
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* Checks whether a given request has permission to view the local pattern directory.
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*
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* @since 5.8.0
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*
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* @param WP_REST_Request $request Full details about the request.
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* @return true|WP_Error True if the request has permission, WP_Error object otherwise.
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*/
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public function get_items_permissions_check( $request ) {
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if ( current_user_can( 'edit_posts' ) ) {
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return true;
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}
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foreach ( get_post_types( array( 'show_in_rest' => true ), 'objects' ) as $post_type ) {
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if ( current_user_can( $post_type->cap->edit_posts ) ) {
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return true;
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}
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}
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return new WP_Error(
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'rest_pattern_directory_cannot_view',
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__( 'Sorry, you are not allowed to browse the local block pattern directory.' ),
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array( 'status' => rest_authorization_required_code() )
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);
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}
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/**
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* Search and retrieve block patterns metadata
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*
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* @since 5.8.0
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*
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* @param WP_REST_Request $request Full details about the request.
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* @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
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*/
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public function get_items( $request ) {
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/*
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* Include an unmodified `$wp_version`, so the API can craft a response that's tailored to
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* it. Some plugins modify the version in a misguided attempt to improve security by
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* obscuring the version, which can cause invalid requests.
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*/
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require ABSPATH . WPINC . '/version.php';
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$query_args = array(
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'locale' => get_user_locale(),
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'wp-version' => $wp_version,
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);
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$category_id = $request['category'];
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$keyword_id = $request['keyword'];
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$search_term = $request['search'];
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if ( $category_id ) {
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$query_args['pattern-categories'] = $category_id;
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}
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if ( $keyword_id ) {
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$query_args['pattern-keywords'] = $keyword_id;
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}
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if ( $search_term ) {
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$query_args['search'] = $search_term;
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}
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/*
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* Include a hash of the query args, so that different requests are stored in
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* separate caches.
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*
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* MD5 is chosen for its speed, low-collision rate, universal availability, and to stay
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* under the character limit for `_site_transient_timeout_{...}` keys.
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*
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* @link https://stackoverflow.com/questions/3665247/fastest-hash-for-non-cryptographic-uses
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*/
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$transient_key = 'wp_remote_block_patterns_' . md5( implode( '-', $query_args ) );
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/*
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* Use network-wide transient to improve performance. The locale is the only site
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* configuration that affects the response, and it's included in the transient key.
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*/
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$raw_patterns = get_site_transient( $transient_key );
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if ( ! $raw_patterns ) {
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$api_url = add_query_arg(
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array_map( 'rawurlencode', $query_args ),
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'http://api.wordpress.org/patterns/1.0/'
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);
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if ( wp_http_supports( array( 'ssl' ) ) ) {
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$api_url = set_url_scheme( $api_url, 'https' );
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}
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/*
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* Default to a short TTL, to mitigate cache stampedes on high-traffic sites.
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* This assumes that most errors will be short-lived, e.g., packet loss that causes the
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* first request to fail, but a follow-up one will succeed. The value should be high
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* enough to avoid stampedes, but low enough to not interfere with users manually
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* re-trying a failed request.
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*/
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$cache_ttl = 5;
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$wporg_response = wp_remote_get( $api_url );
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$raw_patterns = json_decode( wp_remote_retrieve_body( $wporg_response ) );
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if ( is_wp_error( $wporg_response ) ) {
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$raw_patterns = $wporg_response;
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} elseif ( ! is_array( $raw_patterns ) ) {
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// HTTP request succeeded, but response data is invalid.
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$raw_patterns = new WP_Error(
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'pattern_api_failed',
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sprintf(
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/* translators: %s: Support forums URL. */
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__( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
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__( 'https://wordpress.org/support/forums/' )
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),
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array(
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'response' => wp_remote_retrieve_body( $wporg_response ),
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)
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);
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} else {
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// Response has valid data.
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$cache_ttl = HOUR_IN_SECONDS;
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}
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set_site_transient( $transient_key, $raw_patterns, $cache_ttl );
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}
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if ( is_wp_error( $raw_patterns ) ) {
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$raw_patterns->add_data( array( 'status' => 500 ) );
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return $raw_patterns;
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}
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$response = array();
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if ( $raw_patterns ) {
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foreach ( $raw_patterns as $pattern ) {
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$response[] = $this->prepare_response_for_collection(
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$this->prepare_item_for_response( $pattern, $request )
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);
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}
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}
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return new WP_REST_Response( $response );
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}
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/**
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* Prepare a raw pattern before it's output in an API response.
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*
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* @since 5.8.0
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*
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* @param object $raw_pattern A pattern from api.wordpress.org, before any changes.
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* @param WP_REST_Request $request Request object.
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* @return WP_REST_Response
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*/
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public function prepare_item_for_response( $raw_pattern, $request ) {
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$prepared_pattern = array(
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'id' => absint( $raw_pattern->id ),
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'title' => sanitize_text_field( $raw_pattern->title->rendered ),
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'content' => wp_kses_post( $raw_pattern->pattern_content ),
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'categories' => array_map( 'sanitize_title', $raw_pattern->category_slugs ),
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'keywords' => array_map( 'sanitize_text_field', explode( ',', $raw_pattern->meta->wpop_keywords ) ),
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'description' => sanitize_text_field( $raw_pattern->meta->wpop_description ),
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'viewport_width' => absint( $raw_pattern->meta->wpop_viewport_width ),
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);
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$prepared_pattern = $this->add_additional_fields_to_object( $prepared_pattern, $request );
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$response = new WP_REST_Response( $prepared_pattern );
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/**
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* Filters the REST API response for a pattern.
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*
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* @since 5.8.0
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*
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* @param WP_REST_Response $response The response object.
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* @param object $raw_pattern The unprepared pattern.
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* @param WP_REST_Request $request The request object.
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*/
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return apply_filters( 'rest_prepare_block_pattern', $response, $raw_pattern, $request );
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}
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/**
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* Retrieves the pattern's schema, conforming to JSON Schema.
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*
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* @since 5.8.0
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*
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* @return array Item schema data.
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*/
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public function get_item_schema() {
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if ( $this->schema ) {
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return $this->add_additional_fields_schema( $this->schema );
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}
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$this->schema = array(
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'$schema' => 'http://json-schema.org/draft-04/schema#',
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'title' => 'pattern-directory-item',
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'type' => 'object',
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'properties' => array(
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'id' => array(
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'description' => __( 'The pattern ID.' ),
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'type' => 'integer',
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'minimum' => 1,
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'context' => array( 'view', 'embed' ),
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),
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'title' => array(
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'description' => __( 'The pattern title, in human readable format.' ),
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'type' => 'string',
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'minLength' => 1,
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'context' => array( 'view', 'embed' ),
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),
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'content' => array(
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'description' => __( 'The pattern content.' ),
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'type' => 'string',
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'minLength' => 1,
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'context' => array( 'view', 'embed' ),
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),
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'categories' => array(
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'description' => __( "The pattern's category slugs." ),
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'type' => 'array',
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'uniqueItems' => true,
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'items' => array( 'type' => 'string' ),
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'context' => array( 'view', 'embed' ),
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),
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'keywords' => array(
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'description' => __( "The pattern's keywords." ),
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'type' => 'array',
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'uniqueItems' => true,
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'items' => array( 'type' => 'string' ),
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'context' => array( 'view', 'embed' ),
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),
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'description' => array(
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'description' => __( 'A description of the pattern.' ),
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'type' => 'string',
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'minLength' => 1,
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'context' => array( 'view', 'embed' ),
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),
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'viewport_width' => array(
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'description' => __( 'The preferred width of the viewport when previewing a pattern, in pixels.' ),
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'type' => 'integer',
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'context' => array( 'view', 'embed' ),
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),
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),
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);
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return $this->add_additional_fields_schema( $this->schema );
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}
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/**
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* Retrieves the search params for the patterns collection.
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*
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* @since 5.8.0
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*
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* @return array Collection parameters.
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*/
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public function get_collection_params() {
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$query_params = parent::get_collection_params();
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// Pagination is not supported.
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unset( $query_params['page'] );
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unset( $query_params['per_page'] );
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$query_params['search']['minLength'] = 1;
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$query_params['context']['default'] = 'view';
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$query_params['category'] = array(
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'description' => __( 'Limit results to those matching a category ID.' ),
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'type' => 'integer',
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'minimum' => 1,
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);
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$query_params['keyword'] = array(
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'description' => __( 'Limit results to those matching a keyword ID.' ),
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'type' => 'integer',
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'minimum' => 1,
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);
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/**
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* Filter collection parameters for the pattern directory controller.
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*
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* @since 5.8.0
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*
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* @param array $query_params JSON Schema-formatted collection parameters.
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*/
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return apply_filters( 'rest_pattern_directory_collection_params', $query_params );
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}
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}
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