665 lines
18 KiB
PHP
665 lines
18 KiB
PHP
<?php
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/**
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* REST API: WP_REST_Controller class
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*
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* @package WordPress
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* @subpackage REST_API
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* @since 4.7.0
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*/
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/**
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* Core base controller for managing and interacting with REST API items.
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*
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* @since 4.7.0
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*/
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#[AllowDynamicProperties]
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abstract class WP_REST_Controller {
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/**
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* The namespace of this controller's route.
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*
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* @since 4.7.0
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* @var string
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*/
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protected $namespace;
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/**
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* The base of this controller's route.
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*
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* @since 4.7.0
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* @var string
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*/
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protected $rest_base;
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/**
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* Cached results of get_item_schema.
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*
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* @since 5.3.0
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* @var array
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*/
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protected $schema;
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/**
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* Registers the routes for the objects of the controller.
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*
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* @since 4.7.0
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*
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* @see register_rest_route()
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*/
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public function register_routes() {
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_doing_it_wrong(
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'WP_REST_Controller::register_routes',
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/* translators: %s: register_routes() */
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sprintf( __( "Method '%s' must be overridden." ), __METHOD__ ),
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'4.7.0'
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);
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}
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/**
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* Checks if a given request has access to get items.
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*
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* @since 4.7.0
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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 read access, WP_Error object otherwise.
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*/
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public function get_items_permissions_check( $request ) {
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return new WP_Error(
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'invalid-method',
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/* translators: %s: Method name. */
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sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ),
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array( 'status' => 405 )
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);
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}
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/**
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* Retrieves a collection of items.
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*
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* @since 4.7.0
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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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return new WP_Error(
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'invalid-method',
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/* translators: %s: Method name. */
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sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ),
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array( 'status' => 405 )
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);
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}
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/**
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* Checks if a given request has access to get a specific item.
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*
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* @since 4.7.0
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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 read access for the item, WP_Error object otherwise.
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*/
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public function get_item_permissions_check( $request ) {
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return new WP_Error(
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'invalid-method',
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/* translators: %s: Method name. */
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sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ),
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array( 'status' => 405 )
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);
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}
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/**
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* Retrieves one item from the collection.
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*
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* @since 4.7.0
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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_item( $request ) {
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return new WP_Error(
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'invalid-method',
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/* translators: %s: Method name. */
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sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ),
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array( 'status' => 405 )
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);
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}
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/**
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* Checks if a given request has access to create items.
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*
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* @since 4.7.0
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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 access to create items, WP_Error object otherwise.
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*/
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public function create_item_permissions_check( $request ) {
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return new WP_Error(
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'invalid-method',
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/* translators: %s: Method name. */
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sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ),
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array( 'status' => 405 )
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);
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}
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/**
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* Creates one item from the collection.
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*
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* @since 4.7.0
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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 create_item( $request ) {
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return new WP_Error(
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'invalid-method',
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/* translators: %s: Method name. */
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sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ),
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array( 'status' => 405 )
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);
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}
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/**
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* Checks if a given request has access to update a specific item.
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*
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* @since 4.7.0
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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 access to update the item, WP_Error object otherwise.
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*/
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public function update_item_permissions_check( $request ) {
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return new WP_Error(
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'invalid-method',
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/* translators: %s: Method name. */
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sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ),
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array( 'status' => 405 )
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);
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}
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/**
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* Updates one item from the collection.
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*
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* @since 4.7.0
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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 update_item( $request ) {
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return new WP_Error(
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'invalid-method',
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/* translators: %s: Method name. */
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sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ),
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array( 'status' => 405 )
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);
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}
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/**
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* Checks if a given request has access to delete a specific item.
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*
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* @since 4.7.0
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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 access to delete the item, WP_Error object otherwise.
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*/
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public function delete_item_permissions_check( $request ) {
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return new WP_Error(
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'invalid-method',
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/* translators: %s: Method name. */
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sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ),
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array( 'status' => 405 )
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);
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}
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/**
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* Deletes one item from the collection.
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*
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* @since 4.7.0
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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 delete_item( $request ) {
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return new WP_Error(
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'invalid-method',
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/* translators: %s: Method name. */
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sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ),
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array( 'status' => 405 )
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);
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}
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/**
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* Prepares one item for create or update operation.
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*
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* @since 4.7.0
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*
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* @param WP_REST_Request $request Request object.
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* @return object|WP_Error The prepared item, or WP_Error object on failure.
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*/
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protected function prepare_item_for_database( $request ) {
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return new WP_Error(
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'invalid-method',
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/* translators: %s: Method name. */
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sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ),
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array( 'status' => 405 )
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);
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}
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/**
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* Prepares the item for the REST response.
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*
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* @since 4.7.0
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*
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* @param mixed $item WordPress representation of the item.
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* @param WP_REST_Request $request Request object.
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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 prepare_item_for_response( $item, $request ) {
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return new WP_Error(
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'invalid-method',
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/* translators: %s: Method name. */
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sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ),
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array( 'status' => 405 )
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);
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}
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/**
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* Prepares a response for insertion into a collection.
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*
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* @since 4.7.0
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*
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* @param WP_REST_Response $response Response object.
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* @return array|mixed Response data, ready for insertion into collection data.
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*/
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public function prepare_response_for_collection( $response ) {
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if ( ! ( $response instanceof WP_REST_Response ) ) {
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return $response;
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}
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$data = (array) $response->get_data();
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$server = rest_get_server();
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$links = $server::get_compact_response_links( $response );
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if ( ! empty( $links ) ) {
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$data['_links'] = $links;
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}
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return $data;
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}
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/**
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* Filters a response based on the context defined in the schema.
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*
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* @since 4.7.0
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*
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* @param array $data Response data to filter.
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* @param string $context Context defined in the schema.
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* @return array Filtered response.
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*/
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public function filter_response_by_context( $data, $context ) {
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$schema = $this->get_item_schema();
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return rest_filter_response_by_context( $data, $schema, $context );
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}
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/**
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* Retrieves the item's schema, conforming to JSON Schema.
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*
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* @since 4.7.0
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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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return $this->add_additional_fields_schema( array() );
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}
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/**
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* Retrieves the item's schema for display / public consumption purposes.
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*
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* @since 4.7.0
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*
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* @return array Public item schema data.
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*/
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public function get_public_item_schema() {
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$schema = $this->get_item_schema();
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if ( ! empty( $schema['properties'] ) ) {
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foreach ( $schema['properties'] as &$property ) {
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unset( $property['arg_options'] );
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}
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}
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return $schema;
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}
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/**
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* Retrieves the query params for the collections.
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*
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* @since 4.7.0
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*
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* @return array Query parameters for the collection.
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*/
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public function get_collection_params() {
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return array(
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'context' => $this->get_context_param(),
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'page' => array(
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'description' => __( 'Current page of the collection.' ),
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'type' => 'integer',
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'default' => 1,
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'sanitize_callback' => 'absint',
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'validate_callback' => 'rest_validate_request_arg',
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'minimum' => 1,
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),
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'per_page' => array(
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'description' => __( 'Maximum number of items to be returned in result set.' ),
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'type' => 'integer',
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'default' => 10,
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'minimum' => 1,
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'maximum' => 100,
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'sanitize_callback' => 'absint',
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'validate_callback' => 'rest_validate_request_arg',
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),
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'search' => array(
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'description' => __( 'Limit results to those matching a string.' ),
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'type' => 'string',
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'sanitize_callback' => 'sanitize_text_field',
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'validate_callback' => 'rest_validate_request_arg',
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),
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);
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}
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/**
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* Retrieves the magical context param.
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*
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* Ensures consistent descriptions between endpoints, and populates enum from schema.
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*
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* @since 4.7.0
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*
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* @param array $args Optional. Additional arguments for context parameter. Default empty array.
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* @return array Context parameter details.
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*/
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public function get_context_param( $args = array() ) {
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$param_details = array(
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'description' => __( 'Scope under which the request is made; determines fields present in response.' ),
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'type' => 'string',
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'sanitize_callback' => 'sanitize_key',
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'validate_callback' => 'rest_validate_request_arg',
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);
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$schema = $this->get_item_schema();
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if ( empty( $schema['properties'] ) ) {
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return array_merge( $param_details, $args );
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}
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$contexts = array();
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foreach ( $schema['properties'] as $attributes ) {
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if ( ! empty( $attributes['context'] ) ) {
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$contexts = array_merge( $contexts, $attributes['context'] );
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}
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}
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if ( ! empty( $contexts ) ) {
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$param_details['enum'] = array_unique( $contexts );
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rsort( $param_details['enum'] );
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}
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return array_merge( $param_details, $args );
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}
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/**
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* Adds the values from additional fields to a data object.
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*
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* @since 4.7.0
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*
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* @param array $prepared Prepared response array.
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* @param WP_REST_Request $request Full details about the request.
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* @return array Modified data object with additional fields.
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*/
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protected function add_additional_fields_to_object( $prepared, $request ) {
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$additional_fields = $this->get_additional_fields();
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$requested_fields = $this->get_fields_for_response( $request );
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foreach ( $additional_fields as $field_name => $field_options ) {
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if ( ! $field_options['get_callback'] ) {
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continue;
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}
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if ( ! rest_is_field_included( $field_name, $requested_fields ) ) {
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continue;
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}
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$prepared[ $field_name ] = call_user_func( $field_options['get_callback'], $prepared, $field_name, $request, $this->get_object_type() );
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}
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return $prepared;
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}
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/**
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* Updates the values of additional fields added to a data object.
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*
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* @since 4.7.0
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*
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* @param object $object Data model like WP_Term or WP_Post.
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* @param WP_REST_Request $request Full details about the request.
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* @return true|WP_Error True on success, WP_Error object if a field cannot be updated.
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*/
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protected function update_additional_fields_for_object( $object, $request ) {
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$additional_fields = $this->get_additional_fields();
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foreach ( $additional_fields as $field_name => $field_options ) {
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if ( ! $field_options['update_callback'] ) {
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continue;
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}
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// Don't run the update callbacks if the data wasn't passed in the request.
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if ( ! isset( $request[ $field_name ] ) ) {
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continue;
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}
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$result = call_user_func( $field_options['update_callback'], $request[ $field_name ], $object, $field_name, $request, $this->get_object_type() );
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if ( is_wp_error( $result ) ) {
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return $result;
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}
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}
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return true;
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}
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/**
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* Adds the schema from additional fields to a schema array.
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*
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* The type of object is inferred from the passed schema.
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*
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* @since 4.7.0
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*
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* @param array $schema Schema array.
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* @return array Modified Schema array.
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*/
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protected function add_additional_fields_schema( $schema ) {
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if ( empty( $schema['title'] ) ) {
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return $schema;
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}
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// Can't use $this->get_object_type otherwise we cause an inf loop.
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$object_type = $schema['title'];
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$additional_fields = $this->get_additional_fields( $object_type );
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foreach ( $additional_fields as $field_name => $field_options ) {
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if ( ! $field_options['schema'] ) {
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continue;
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}
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$schema['properties'][ $field_name ] = $field_options['schema'];
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}
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return $schema;
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}
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/**
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* Retrieves all of the registered additional fields for a given object-type.
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*
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* @since 4.7.0
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*
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* @global array $wp_rest_additional_fields Holds registered fields, organized by object type.
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*
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* @param string $object_type Optional. The object type.
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* @return array Registered additional fields (if any), empty array if none or if the object type
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* could not be inferred.
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*/
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protected function get_additional_fields( $object_type = null ) {
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global $wp_rest_additional_fields;
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if ( ! $object_type ) {
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$object_type = $this->get_object_type();
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}
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if ( ! $object_type ) {
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return array();
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}
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if ( ! $wp_rest_additional_fields || ! isset( $wp_rest_additional_fields[ $object_type ] ) ) {
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return array();
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}
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return $wp_rest_additional_fields[ $object_type ];
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}
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/**
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* Retrieves the object type this controller is responsible for managing.
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*
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* @since 4.7.0
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*
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* @return string Object type for the controller.
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*/
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protected function get_object_type() {
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$schema = $this->get_item_schema();
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if ( ! $schema || ! isset( $schema['title'] ) ) {
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return null;
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}
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return $schema['title'];
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}
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/**
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* Gets an array of fields to be included on the response.
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*
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* Included fields are based on item schema and `_fields=` request argument.
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*
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* @since 4.9.6
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*
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* @param WP_REST_Request $request Full details about the request.
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* @return string[] Fields to be included in the response.
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*/
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public function get_fields_for_response( $request ) {
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$schema = $this->get_item_schema();
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$properties = isset( $schema['properties'] ) ? $schema['properties'] : array();
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$additional_fields = $this->get_additional_fields();
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foreach ( $additional_fields as $field_name => $field_options ) {
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// For back-compat, include any field with an empty schema
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// because it won't be present in $this->get_item_schema().
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if ( is_null( $field_options['schema'] ) ) {
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$properties[ $field_name ] = $field_options;
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}
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}
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// Exclude fields that specify a different context than the request context.
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$context = $request['context'];
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if ( $context ) {
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foreach ( $properties as $name => $options ) {
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if ( ! empty( $options['context'] ) && ! in_array( $context, $options['context'], true ) ) {
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unset( $properties[ $name ] );
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}
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}
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}
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$fields = array_keys( $properties );
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/*
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* '_links' and '_embedded' are not typically part of the item schema,
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* but they can be specified in '_fields', so they are added here as a
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* convenience for checking with rest_is_field_included().
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*/
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$fields[] = '_links';
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if ( $request->has_param( '_embed' ) ) {
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$fields[] = '_embedded';
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}
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$fields = array_unique( $fields );
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if ( ! isset( $request['_fields'] ) ) {
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return $fields;
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}
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$requested_fields = wp_parse_list( $request['_fields'] );
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if ( 0 === count( $requested_fields ) ) {
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return $fields;
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}
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// Trim off outside whitespace from the comma delimited list.
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$requested_fields = array_map( 'trim', $requested_fields );
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// Always persist 'id', because it can be needed for add_additional_fields_to_object().
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if ( in_array( 'id', $fields, true ) ) {
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$requested_fields[] = 'id';
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}
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// Return the list of all requested fields which appear in the schema.
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return array_reduce(
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$requested_fields,
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static function( $response_fields, $field ) use ( $fields ) {
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if ( in_array( $field, $fields, true ) ) {
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$response_fields[] = $field;
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return $response_fields;
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}
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// Check for nested fields if $field is not a direct match.
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$nested_fields = explode( '.', $field );
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// A nested field is included so long as its top-level property
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// is present in the schema.
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if ( in_array( $nested_fields[0], $fields, true ) ) {
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$response_fields[] = $field;
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}
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return $response_fields;
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},
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array()
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);
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}
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/**
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* Retrieves an array of endpoint arguments from the item schema for the controller.
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*
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* @since 4.7.0
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*
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* @param string $method Optional. HTTP method of the request. The arguments for `CREATABLE` requests are
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* checked for required values and may fall-back to a given default, this is not done
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* on `EDITABLE` requests. Default WP_REST_Server::CREATABLE.
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* @return array Endpoint arguments.
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*/
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public function get_endpoint_args_for_item_schema( $method = WP_REST_Server::CREATABLE ) {
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return rest_get_endpoint_args_for_schema( $this->get_item_schema(), $method );
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}
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/**
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* Sanitizes the slug value.
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*
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* @since 4.7.0
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*
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* @internal We can't use sanitize_title() directly, as the second
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* parameter is the fallback title, which would end up being set to the
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* request object.
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*
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* @see https://github.com/WP-API/WP-API/issues/1585
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*
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* @todo Remove this in favour of https://core.trac.wordpress.org/ticket/34659
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*
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* @param string $slug Slug value passed in request.
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* @return string Sanitized value for the slug.
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*/
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public function sanitize_slug( $slug ) {
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return sanitize_title( $slug );
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}
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}
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