<?php
/**
* REST API: WP_REST_Search_Controller class
*
* @package WordPress
* @subpackage REST_API
* @since 5.0.0
*/
/**
* Core class to search through all WordPress content via the REST API.
*
* @since 5.0.0
*
* @see WP_REST_Controller
*/
class WP_REST_Search_Controller extends WP_REST_Controller {
/**
* ID property name.
*/
const PROP_ID = 'id';
/**
* Title property name.
*/
const PROP_TITLE = 'title';
/**
* URL property name.
*/
const PROP_URL = 'url';
/**
* Type property name.
*/
const PROP_TYPE = 'type';
/**
* Subtype property name.
*/
const PROP_SUBTYPE = 'subtype';
/**
* Identifier for the 'any' type.
*/
const TYPE_ANY = 'any';
/**
* Search handlers used by the controller.
*
* @since 5.0.0
* @var WP_REST_Search_Handler[]
*/
protected $search_handlers = array();
/**
* Constructor.
*
* @since 5.0.0
*
* @param array $search_handlers List of search handlers to use in the controller. Each search
* handler instance must extend the `WP_REST_Search_Handler` class.
*/
public function __construct( array $search_handlers ) {
$this->namespace = 'wp/v2';
$this->rest_base = 'search';
foreach ( $search_handlers as $search_handler ) {
if ( ! $search_handler instanceof WP_REST_Search_Handler ) {
_doing_it_wrong(
__METHOD__,
/* translators: %s: PHP class name. */
sprintf( __( 'REST search handlers must extend the %s class.' ), 'WP_REST_Search_Handler' ),
'5.0.0'
);
continue;
}
$this->search_handlers[ $search_handler->get_type() ] = $search_handler;
}
}
/**
* Registers the routes for the search controller.
*
* @since 5.0.0
*
* @see register_rest_route()
*/
public function register_routes() {
register_rest_route(
$this->namespace,
'/' . $this->rest_base,
array(
array(
'methods' => WP_REST_Server::READABLE,
'callback' => array( $this, 'get_items' ),
'permission_callback' => array( $this, 'get_items_permission_check' ),
'args' => $this->get_collection_params(),
),
'schema' => array( $this, 'get_public_item_schema' ),
)
);
}
/**
* Checks if a given request has access to search content.
*
* @since 5.0.0
*
* @param WP_REST_Request $request Full details about the request.
* @return true|WP_Error True if the request has search access, WP_Error object otherwise.
*/
public function get_items_permission_check( $request ) {
return true;
}
/**
* Retrieves a collection of search results.
*
* @since 5.0.0
*
* @param WP_REST_Request $request Full details about the request.
* @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
*/
public function get_items( $request ) {
$handler = $this->get_search_handler( $request );
if ( is_wp_error( $handler ) ) {
return $handler;
}
$result = $handler->search_items( $request );
if ( ! isset( $result[ WP_REST_Search_Handler::RESULT_IDS ] ) || ! is_array( $result[ WP_REST_Search_Handler::RESULT_IDS ] ) || ! isset( $result[ WP_REST_Search_Handler::RESULT_TOTAL ] ) ) {
return new WP_Error(
'rest_search_handler_error',
__( 'Internal search handler error.' ),
array( 'status' => 500 )
);
}
$ids = $result[ WP_REST_Search_Handler::RESULT_IDS ];
$is_head_request = $request->is_method( 'HEAD' );
if ( ! $is_head_request ) {
$results = array();
foreach ( $ids as $id ) {
$data = $this->prepare_item_for_response( $id, $request );
$results[] = $this->prepare_response_for_collection( $data );
}
}
$total = (int) $result[ WP_REST_Search_Handler::RESULT_TOTAL ];
$page = (int) $request['page'];
$per_page = (int) $request['per_page'];
$max_pages = (int) ceil( $total / $per_page );
if ( $page > $max_pages && $total > 0 ) {
return new WP_Error(
'rest_search_invalid_page_number',
__( 'The page number requested is larger than the number of pages available.' ),
array( 'status' => 400 )
);
}
$response = $is_head_request ? new WP_REST_Response( array() ) : rest_ensure_response( $results );
$response->header( 'X-WP-Total', $total );
$response->header( 'X-WP-TotalPages', $max_pages );
$request_params = $request->get_query_params();
$base = add_query_arg( urlencode_deep( $request_params ), rest_url( sprintf( '%s/%s', $this->namespace, $this->rest_base ) ) );
if ( $page > 1 ) {
$prev_link = add_query_arg( 'page', $page - 1, $base );
$response->link_header( 'prev', $prev_link );
}
if ( $page < $max_pages ) {
$next_link = add_query_arg( 'page', $page + 1, $base );
$response->link_header( 'next', $next_link );
}
return $response;
}
/**
* Prepares a single search result for response.
*
* @since 5.0.0
* @since 5.6.0 The `$id` parameter can accept a string.
* @since 5.9.0 Renamed `$id` to `$item` to match parent class for PHP 8 named parameter support.
*
* @param int|string $item ID of the item to prepare.
* @param WP_REST_Request $request Request object.
* @return WP_REST_Response Response object.
*/
public function prepare_item_for_response( $item, $request ) {
// Restores the more descriptive, specific name for use within this method.
$item_id = $item;
$handler = $this->get_search_handler( $request );
if ( is_wp_error( $handler ) ) {
return new WP_REST_Response();
}
$fields = $this->get_fields_for_response( $request );
$data = $handler->prepare_item( $item_id, $fields );
$data = $this->add_additional_fields_to_object( $data, $request );
$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
$data = $this->filter_response_by_context( $data, $context );
$response = rest_ensure_response( $data );
if ( rest_is_field_included( '_links', $fields ) || rest_is_field_included( '_embedded', $fields ) ) {
$links = $handler->prepare_item_links( $item_id );
$links['collection'] = array(
'href' => rest_url( sprintf( '%s/%s', $this->namespace, $this->rest_base ) ),
);
$response->add_links( $links );
}
return $response;
}
/**
* Retrieves the item schema, conforming to JSON Schema.
*
* @since 5.0.0
*
* @return array Item schema data.
*/
public function get_item_schema() {
if ( $this->schema ) {
return $this->add_additional_fields_schema( $this->schema );
}
$types = array();
$subtypes = array();
foreach ( $this->search_handlers as $search_handler ) {
$types[] = $search_handler->get_type();
$subtypes = array_merge( $subtypes, $search_handler->get_subtypes() );
}
$types = array_unique( $types );
$subtypes = array_unique( $subtypes );
$schema = array(
'$schema' => 'http://json-schema.org/draft-04/schema#',
'title' => 'search-result',
'type' => 'object',
'properties' => array(
self::PROP_ID => array(
'description' => __( 'Unique identifier for the object.' ),
'type' => array( 'integer', 'string' ),
'context' => array( 'view', 'embed' ),
'readonly' => true,
),
self::PROP_TITLE => array(
'description' => __( 'The title for the object.' ),
'type' => 'string',
'context' => array( 'view', 'embed' ),
'readonly' => true,
),
self::PROP_URL => array(
'description' => __( 'URL to the object.' ),
'type' => 'string',
'format' => 'uri',
'context' => array( 'view', 'embed' ),
'readonly' => true,
),
self::PROP_TYPE => array(
'description' => __( 'Object type.' ),
'type' => 'string',
'enum' => $types,
'context' => array( 'view', 'embed' ),
'readonly' => true,
),
self::PROP_SUBTYPE => array(
'description' => __( 'Object subtype.' ),
'type' => 'string',
'enum' => $subtypes,
'context' => array( 'view', 'embed' ),
'readonly' => true,
),
),
);
$this->schema = $schema;
return $this->add_additional_fields_schema( $this->schema );
}
/**
* Retrieves the query params for the search results collection.
*
* @since 5.0.0
*
* @return array Collection parameters.
*/
public function get_collection_params() {
$types = array();
$subtypes = array();
foreach ( $this->search_handlers as $search_handler ) {
$types[] = $search_handler->get_type();
$subtypes = array_merge( $subtypes, $search_handler->get_subtypes() );
}
$types = array_unique( $types );
$subtypes = array_unique( $subtypes );
$query_params = parent::get_collection_params();
$query_params['context']['default'] = 'view';
$query_params[ self::PROP_TYPE ] = array(
'default' => $types[0],
'description' => __( 'Limit results to items of an object type.' ),
'type' => 'string',
'enum' => $types,
);
$query_params[ self::PROP_SUBTYPE ] = array(
'default' => self::TYPE_ANY,
'description' => __( 'Limit results to items of one or more object subtypes.' ),
'type' => 'array',
'items' => array(
'enum' => array_merge( $subtypes, array( self::TYPE_ANY ) ),
'type' => 'string',
),
'sanitize_callback' => array( $this, 'sanitize_subtypes' ),
);
$query_params['exclude'] = array(
'description' => __( 'Ensure result set excludes specific IDs.' ),
'type' => 'array',
'items' => array(
'type' => 'integer',
),
'default' => array(),
);
$query_params['include'] = array(
'description' => __( 'Limit result set to specific IDs.' ),
'type' => 'array',
'items' => array(
'type' => 'integer',
),
'default' => array(),
);
return $query_params;
}
/**
* Sanitizes the list of subtypes, to ensure only subtypes of the passed type are included.
*
* @since 5.0.0
*
* @param string|array $subtypes One or more subtypes.
* @param WP_REST_Request $request Full details about the request.
* @param string $parameter Parameter name.
* @return string[]|WP_Error List of valid subtypes, or WP_Error object on failure.
*/
public function sanitize_subtypes( $subtypes, $request, $parameter ) {
$subtypes = wp_parse_slug_list( $subtypes );
$subtypes = rest_parse_request_arg( $subtypes, $request, $parameter );
if ( is_wp_error( $subtypes ) ) {
return $subtypes;
}
// 'any' overrides any other subtype.
if ( in_array( self::TYPE_ANY, $subtypes, true ) ) {
return array( self::TYPE_ANY );
}
$handler = $this->get_search_handler( $request );
if ( is_wp_error( $handler ) ) {
return $handler;
}
return array_intersect( $subtypes, $handler->get_subtypes() );
}
/**
* Gets the search handler to handle the current request.
*
* @since 5.0.0
*
* @param WP_REST_Request $request Full details about the request.
* @return WP_REST_Search_Handler|WP_Error Search handler for the request type, or WP_Error object on failure.
*/
protected function get_search_handler( $request ) {
$type = $request->get_param( self::PROP_TYPE );
if ( ! $type || ! is_string( $type ) || ! isset( $this->search_handlers[ $type ] ) ) {
return new WP_Error(
'rest_search_invalid_type',
__( 'Invalid type parameter.' ),
array( 'status' => 400 )
);
}
return $this->search_handlers[ $type ];
}
}