View file File name : class-wp-rest-autosaves-controller.php Content :<?php /** * REST API: WP_REST_Autosaves_Controller class. * * @package WordPress * @subpackage REST_API * @since 5.0.0 */ /** * Core class used to access autosaves via the REST API. * * @since 5.0.0 * * @see WP_REST_Revisions_Controller * @see WP_REST_Controller */ class WP_REST_Autosaves_Controller extends WP_REST_Revisions_Controller { /** * Parent post type. * * @since 5.0.0 * @var string */ private $parent_post_type; /** * Parent post controller. * * @since 5.0.0 * @var WP_REST_Controller */ private $parent_controller; /** * Revision controller. * * @since 5.0.0 * @var WP_REST_Revisions_Controller */ private $revisions_controller; /** * The base of the parent controller's route. * * @since 5.0.0 * @var string */ private $parent_base; /** * Constructor. * * @since 5.0.0 * * @param string $parent_post_type Post type of the parent. */ public function __construct( $parent_post_type ) { $this->parent_post_type = $parent_post_type; $post_type_object = get_post_type_object( $parent_post_type ); $parent_controller = $post_type_object->get_rest_controller(); if ( ! $parent_controller ) { $parent_controller = new WP_REST_Posts_Controller( $parent_post_type ); } $this->parent_controller = $parent_controller; $this->revisions_controller = new WP_REST_Revisions_Controller( $parent_post_type ); $this->rest_base = 'autosaves'; $this->parent_base = ! empty( $post_type_object->rest_base ) ? $post_type_object->rest_base : $post_type_object->name; $this->namespace = ! empty( $post_type_object->rest_namespace ) ? $post_type_object->rest_namespace : 'wp/v2'; } /** * Registers the routes for autosaves. * * @since 5.0.0 * * @see register_rest_route() */ public function register_routes() { register_rest_route( $this->namespace, '/' . $this->parent_base . '/(?P<id>[\d]+)/' . $this->rest_base, array( 'args' => array( 'parent' => array( 'description' => __( 'The ID for the parent of the autosave.' ), 'type' => 'integer', ), ), array( 'methods' => WP_REST_Server::READABLE, 'callback' => array( $this, 'get_items' ), 'permission_callback' => array( $this, 'get_items_permissions_check' ), 'args' => $this->get_collection_params(), ), array( 'methods' => WP_REST_Server::CREATABLE, 'callback' => array( $this, 'create_item' ), 'permission_callback' => array( $this, 'create_item_permissions_check' ), 'args' => $this->parent_controller->get_endpoint_args_for_item_schema( WP_REST_Server::EDITABLE ), ), 'schema' => array( $this, 'get_public_item_schema' ), ) ); register_rest_route( $this->namespace, '/' . $this->parent_base . '/(?P<parent>[\d]+)/' . $this->rest_base . '/(?P<id>[\d]+)', array( 'args' => array( 'parent' => array( 'description' => __( 'The ID for the parent of the autosave.' ), 'type' => 'integer', ), 'id' => array( 'description' => __( 'The ID for the autosave.' ), 'type' => 'integer', ), ), array( 'methods' => WP_REST_Server::READABLE, 'callback' => array( $this, 'get_item' ), 'permission_callback' => array( $this->revisions_controller, 'get_item_permissions_check' ), 'args' => array( 'context' => $this->get_context_param( array( 'default' => 'view' ) ), ), ), 'schema' => array( $this, 'get_public_item_schema' ), ) ); } /** * Get the parent post. * * @since 5.0.0 * * @param int $parent_id Supplied ID. * @return WP_Post|WP_Error Post object if ID is valid, WP_Error otherwise. */ protected function get_parent( $parent_id ) { return $this->revisions_controller->get_parent( $parent_id ); } /** * Checks if a given request has access to get autosaves. * * @since 5.0.0 * * @param WP_REST_Request $request Full details about the request. * @return true|WP_Error True if the request has read access, WP_Error object otherwise. */ public function get_items_permissions_check( $request ) { $parent = $this->get_parent( $request['id'] ); if ( is_wp_error( $parent ) ) { return $parent; } if ( ! current_user_can( 'edit_post', $parent->ID ) ) { return new WP_Error( 'rest_cannot_read', __( 'Sorry, you are not allowed to view autosaves of this post.' ), array( 'status' => rest_authorization_required_code() ) ); } return true; } /** * Checks if a given request has access to create an autosave revision. * * Autosave revisions inherit permissions from the parent post, * check if the current user has permission to edit the post. * * @since 5.0.0 * * @param WP_REST_Request $request Full details about the request. * @return true|WP_Error True if the request has access to create the item, WP_Error object otherwise. */ public function create_item_permissions_check( $request ) { $id = $request->get_param( 'id' ); if ( empty( $id ) ) { return new WP_Error( 'rest_post_invalid_id', __( 'Invalid item ID.' ), array( 'status' => 404 ) ); } return $this->parent_controller->update_item_permissions_check( $request ); } /** * Creates, updates or deletes an autosave revision. * * @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 create_item( $request ) { if ( ! defined( 'DOING_AUTOSAVE' ) ) { define( 'DOING_AUTOSAVE', true ); } $post = get_post( $request['id'] ); if ( is_wp_error( $post ) ) { return $post; } $prepared_post = $this->parent_controller->prepare_item_for_database( $request ); $prepared_post->ID = $post->ID; $user_id = get_current_user_id(); // We need to check post lock to ensure the original author didn't leave their browser tab open. if ( ! function_exists( 'wp_check_post_lock' ) ) { require_once ABSPATH . 'wp-admin/includes/post.php'; } $post_lock = wp_check_post_lock( $post->ID ); $is_draft = 'draft' === $post->post_status || 'auto-draft' === $post->post_status; if ( $is_draft && (int) $post->post_author === $user_id && ! $post_lock ) { /* * Draft posts for the same author: autosaving updates the post and does not create a revision. * Convert the post object to an array and add slashes, wp_update_post() expects escaped array. */ $autosave_id = wp_update_post( wp_slash( (array) $prepared_post ), true ); } else { // Non-draft posts: create or update the post autosave. $autosave_id = $this->create_post_autosave( (array) $prepared_post ); } if ( is_wp_error( $autosave_id ) ) { return $autosave_id; } $autosave = get_post( $autosave_id ); $request->set_param( 'context', 'edit' ); $response = $this->prepare_item_for_response( $autosave, $request ); $response = rest_ensure_response( $response ); return $response; } /** * Get the autosave, if the ID is valid. * * @since 5.0.0 * * @param WP_REST_Request $request Full details about the request. * @return WP_Post|WP_Error Revision post object if ID is valid, WP_Error otherwise. */ public function get_item( $request ) { $parent_id = (int) $request->get_param( 'parent' ); if ( $parent_id <= 0 ) { return new WP_Error( 'rest_post_invalid_id', __( 'Invalid post parent ID.' ), array( 'status' => 404 ) ); } $autosave = wp_get_post_autosave( $parent_id ); if ( ! $autosave ) { return new WP_Error( 'rest_post_no_autosave', __( 'There is no autosave revision for this post.' ), array( 'status' => 404 ) ); } $response = $this->prepare_item_for_response( $autosave, $request ); return $response; } /** * Gets a collection of autosaves using wp_get_post_autosave. * * Contains the user's autosave, for empty if it doesn't exist. * * @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 ) { $parent = $this->get_parent( $request['id'] ); if ( is_wp_error( $parent ) ) { return $parent; } $response = array(); $parent_id = $parent->ID; $revisions = wp_get_post_revisions( $parent_id, array( 'check_enabled' => false ) ); foreach ( $revisions as $revision ) { if ( str_contains( $revision->post_name, "{$parent_id}-autosave" ) ) { $data = $this->prepare_item_for_response( $revision, $request ); $response[] = $this->prepare_response_for_collection( $data ); } } return rest_ensure_response( $response ); } /** * Retrieves the autosave's 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 ); } $schema = $this->revisions_controller->get_item_schema(); $schema['properties']['preview_link'] = array( 'description' => __( 'Preview link for the post.' ), 'type' => 'string', 'format' => 'uri', 'context' => array( 'edit' ), 'readonly' => true, ); $this->schema = $schema; return $this->add_additional_fields_schema( $this->schema ); } /** * Creates autosave for the specified post. * * From wp-admin/post.php. * * @since 5.0.0 * * @param array $post_data Associative array containing the post data. * @return mixed The autosave revision ID or WP_Error. */ public function create_post_autosave( $post_data ) { $post_id = (int) $post_data['ID']; $post = get_post( $post_id ); if ( is_wp_error( $post ) ) { return $post; } // Only create an autosave when it is different from the saved post. $autosave_is_different = false; $new_autosave = _wp_post_revision_data( $post_data, true ); foreach ( array_intersect( array_keys( $new_autosave ), array_keys( _wp_post_revision_fields( $post ) ) ) as $field ) { if ( normalize_whitespace( $new_autosave[ $field ] ) !== normalize_whitespace( $post->$field ) ) { $autosave_is_different = true; break; } } $user_id = get_current_user_id(); // Store one autosave per author. If there is already an autosave, overwrite it. $old_autosave = wp_get_post_autosave( $post_id, $user_id ); if ( ! $autosave_is_different && $old_autosave ) { // Nothing to save, return the existing autosave. return $old_autosave->ID; } if ( $old_autosave ) { $new_autosave['ID'] = $old_autosave->ID; $new_autosave['post_author'] = $user_id; /** This filter is documented in wp-admin/post.php */ do_action( 'wp_creating_autosave', $new_autosave ); // wp_update_post() expects escaped array. return wp_update_post( wp_slash( $new_autosave ) ); } // Create the new autosave as a special post revision. return _wp_put_post_revision( $post_data, true ); } /** * Prepares the revision for the REST response. * * @since 5.0.0 * @since 5.9.0 Renamed `$post` to `$item` to match parent class for PHP 8 named parameter support. * * @param WP_Post $item Post revision object. * @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. $post = $item; $response = $this->revisions_controller->prepare_item_for_response( $post, $request ); $fields = $this->get_fields_for_response( $request ); if ( in_array( 'preview_link', $fields, true ) ) { $parent_id = wp_is_post_autosave( $post ); $preview_post_id = false === $parent_id ? $post->ID : $parent_id; $preview_query_args = array(); if ( false !== $parent_id ) { $preview_query_args['preview_id'] = $parent_id; $preview_query_args['preview_nonce'] = wp_create_nonce( 'post_preview_' . $parent_id ); } $response->data['preview_link'] = get_preview_post_link( $preview_post_id, $preview_query_args ); } $context = ! empty( $request['context'] ) ? $request['context'] : 'view'; $response->data = $this->add_additional_fields_to_object( $response->data, $request ); $response->data = $this->filter_response_by_context( $response->data, $context ); /** * Filters a revision returned from the REST API. * * Allows modification of the revision right before it is returned. * * @since 5.0.0 * * @param WP_REST_Response $response The response object. * @param WP_Post $post The original revision object. * @param WP_REST_Request $request Request used to generate the response. */ return apply_filters( 'rest_prepare_autosave', $response, $post, $request ); } /** * Retrieves the query params for the autosaves collection. * * @since 5.0.0 * * @return array Collection parameters. */ public function get_collection_params() { return array( 'context' => $this->get_context_param( array( 'default' => 'view' ) ), ); } }