464 lines
13 KiB
PHP
464 lines
13 KiB
PHP
<?php
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/**
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* REST API: WP_REST_Autosaves_Controller class.
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*
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* @package WordPress
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* @subpackage REST_API
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* @since 5.0.0
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*/
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/**
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* Core class used to access autosaves via the REST API.
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*
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* @since 5.0.0
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*
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* @see WP_REST_Revisions_Controller
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* @see WP_REST_Controller
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*/
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class WP_REST_Autosaves_Controller extends WP_REST_Revisions_Controller {
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/**
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* Parent post type.
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*
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* @since 5.0.0
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* @var string
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*/
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private $parent_post_type;
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/**
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* Parent post controller.
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*
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* @since 5.0.0
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* @var WP_REST_Controller
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*/
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private $parent_controller;
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/**
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* Revision controller.
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*
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* @since 5.0.0
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* @var WP_REST_Revisions_Controller
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*/
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private $revisions_controller;
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/**
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* The base of the parent controller's route.
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*
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* @since 5.0.0
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* @var string
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*/
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private $parent_base;
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/**
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* Constructor.
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*
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* @since 5.0.0
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*
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* @param string $parent_post_type Post type of the parent.
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*/
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public function __construct( $parent_post_type ) {
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$this->parent_post_type = $parent_post_type;
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$post_type_object = get_post_type_object( $parent_post_type );
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$parent_controller = $post_type_object->get_rest_controller();
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if ( ! $parent_controller ) {
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$parent_controller = new WP_REST_Posts_Controller( $parent_post_type );
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}
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$this->parent_controller = $parent_controller;
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$this->revisions_controller = new WP_REST_Revisions_Controller( $parent_post_type );
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$this->rest_base = 'autosaves';
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$this->namespace = ! empty( $post_type_object->rest_namespace ) ? $post_type_object->rest_namespace : 'wp/v2';
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$this->parent_base = ! empty( $post_type_object->rest_base ) ? $post_type_object->rest_base : $post_type_object->name;
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}
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/**
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* Registers the routes for autosaves.
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*
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* @since 5.0.0
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*
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* @see register_rest_route()
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*/
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public function register_routes() {
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register_rest_route(
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$this->namespace,
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'/' . $this->parent_base . '/(?P<id>[\d]+)/' . $this->rest_base,
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array(
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'args' => array(
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'parent' => array(
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'description' => __( 'The ID for the parent of the autosave.' ),
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'type' => 'integer',
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),
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),
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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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array(
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'methods' => WP_REST_Server::CREATABLE,
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'callback' => array( $this, 'create_item' ),
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'permission_callback' => array( $this, 'create_item_permissions_check' ),
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'args' => $this->parent_controller->get_endpoint_args_for_item_schema( WP_REST_Server::EDITABLE ),
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),
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'schema' => array( $this, 'get_public_item_schema' ),
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)
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);
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register_rest_route(
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$this->namespace,
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'/' . $this->parent_base . '/(?P<parent>[\d]+)/' . $this->rest_base . '/(?P<id>[\d]+)',
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array(
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'args' => array(
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'parent' => array(
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'description' => __( 'The ID for the parent of the autosave.' ),
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'type' => 'integer',
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),
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'id' => array(
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'description' => __( 'The ID for the autosave.' ),
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'type' => 'integer',
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),
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),
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array(
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'methods' => WP_REST_Server::READABLE,
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'callback' => array( $this, 'get_item' ),
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'permission_callback' => array( $this->revisions_controller, 'get_item_permissions_check' ),
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'args' => array(
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'context' => $this->get_context_param( array( 'default' => 'view' ) ),
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),
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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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* Get the parent post.
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*
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* @since 5.0.0
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*
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* @param int $parent_id Supplied ID.
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* @return WP_Post|WP_Error Post object if ID is valid, WP_Error otherwise.
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*/
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protected function get_parent( $parent_id ) {
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return $this->revisions_controller->get_parent( $parent_id );
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}
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/**
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* Checks if a given request has access to get autosaves.
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*
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* @since 5.0.0
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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( $request ) {
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$parent = $this->get_parent( $request['id'] );
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if ( is_wp_error( $parent ) ) {
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return $parent;
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}
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if ( ! current_user_can( 'edit_post', $parent->ID ) ) {
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return new WP_Error(
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'rest_cannot_read',
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__( 'Sorry, you are not allowed to view autosaves of this post.' ),
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array( 'status' => rest_authorization_required_code() )
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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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* Checks if a given request has access to create an autosave revision.
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*
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* Autosave revisions inherit permissions from the parent post,
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* check if the current user has permission to edit the post.
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*
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* @since 5.0.0
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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 the item, WP_Error object otherwise.
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*/
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public function create_item_permissions_check( $request ) {
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$id = $request->get_param( 'id' );
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if ( empty( $id ) ) {
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return new WP_Error(
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'rest_post_invalid_id',
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__( 'Invalid item ID.' ),
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array( 'status' => 404 )
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);
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}
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return $this->parent_controller->update_item_permissions_check( $request );
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}
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/**
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* Creates, updates or deletes an autosave revision.
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*
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* @since 5.0.0
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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( $request ) {
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if ( ! defined( 'DOING_AUTOSAVE' ) ) {
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define( 'DOING_AUTOSAVE', true );
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}
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$post = get_post( $request['id'] );
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if ( is_wp_error( $post ) ) {
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return $post;
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}
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$prepared_post = $this->parent_controller->prepare_item_for_database( $request );
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$prepared_post->ID = $post->ID;
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$user_id = get_current_user_id();
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// We need to check post lock to ensure the original author didn't leave their browser tab open.
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if ( ! function_exists( 'wp_check_post_lock' ) ) {
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require_once ABSPATH . 'wp-admin/includes/post.php';
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}
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$post_lock = wp_check_post_lock( $post->ID );
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$is_draft = 'draft' === $post->post_status || 'auto-draft' === $post->post_status;
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if ( $is_draft && (int) $post->post_author === $user_id && ! $post_lock ) {
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// Draft posts for the same author: autosaving updates the post and does not create a revision.
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// Convert the post object to an array and add slashes, wp_update_post() expects escaped array.
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$autosave_id = wp_update_post( wp_slash( (array) $prepared_post ), true );
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} else {
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// Non-draft posts: create or update the post autosave.
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$autosave_id = $this->create_post_autosave( (array) $prepared_post );
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}
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if ( is_wp_error( $autosave_id ) ) {
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return $autosave_id;
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}
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$autosave = get_post( $autosave_id );
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$request->set_param( 'context', 'edit' );
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$response = $this->prepare_item_for_response( $autosave, $request );
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$response = rest_ensure_response( $response );
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return $response;
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}
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/**
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* Get the autosave, if the ID is valid.
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*
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* @since 5.0.0
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*
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* @param WP_REST_Request $request Full details about the request.
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* @return WP_Post|WP_Error Revision post object if ID is valid, WP_Error otherwise.
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*/
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public function get_item( $request ) {
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$parent_id = (int) $request->get_param( 'parent' );
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if ( $parent_id <= 0 ) {
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return new WP_Error(
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'rest_post_invalid_id',
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__( 'Invalid post parent ID.' ),
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array( 'status' => 404 )
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);
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}
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$autosave = wp_get_post_autosave( $parent_id );
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if ( ! $autosave ) {
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return new WP_Error(
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'rest_post_no_autosave',
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__( 'There is no autosave revision for this post.' ),
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array( 'status' => 404 )
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);
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}
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$response = $this->prepare_item_for_response( $autosave, $request );
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return $response;
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}
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/**
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* Gets a collection of autosaves using wp_get_post_autosave.
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*
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* Contains the user's autosave, for empty if it doesn't exist.
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*
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* @since 5.0.0
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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( $request ) {
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$parent = $this->get_parent( $request['id'] );
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if ( is_wp_error( $parent ) ) {
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return $parent;
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}
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$response = array();
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$parent_id = $parent->ID;
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$revisions = wp_get_post_revisions( $parent_id, array( 'check_enabled' => false ) );
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foreach ( $revisions as $revision ) {
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if ( false !== strpos( $revision->post_name, "{$parent_id}-autosave" ) ) {
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$data = $this->prepare_item_for_response( $revision, $request );
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$response[] = $this->prepare_response_for_collection( $data );
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}
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}
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return rest_ensure_response( $response );
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}
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/**
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* Retrieves the autosave's schema, conforming to JSON Schema.
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*
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* @since 5.0.0
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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( $this->schema );
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}
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$schema = $this->revisions_controller->get_item_schema();
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$schema['properties']['preview_link'] = array(
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'description' => __( 'Preview link for the post.' ),
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'type' => 'string',
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'format' => 'uri',
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'context' => array( 'edit' ),
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'readonly' => true,
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);
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$this->schema = $schema;
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return $this->add_additional_fields_schema( $this->schema );
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}
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/**
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* Creates autosave for the specified post.
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*
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* From wp-admin/post.php.
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*
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* @since 5.0.0
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*
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* @param array $post_data Associative array containing the post data.
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* @return mixed The autosave revision ID or WP_Error.
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*/
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public function create_post_autosave( $post_data ) {
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$post_id = (int) $post_data['ID'];
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$post = get_post( $post_id );
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if ( is_wp_error( $post ) ) {
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return $post;
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}
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$user_id = get_current_user_id();
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// Store one autosave per author. If there is already an autosave, overwrite it.
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$old_autosave = wp_get_post_autosave( $post_id, $user_id );
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if ( $old_autosave ) {
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$new_autosave = _wp_post_revision_data( $post_data, true );
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$new_autosave['ID'] = $old_autosave->ID;
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$new_autosave['post_author'] = $user_id;
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// If the new autosave has the same content as the post, delete the autosave.
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$autosave_is_different = false;
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foreach ( array_intersect( array_keys( $new_autosave ), array_keys( _wp_post_revision_fields( $post ) ) ) as $field ) {
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if ( normalize_whitespace( $new_autosave[ $field ] ) !== normalize_whitespace( $post->$field ) ) {
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$autosave_is_different = true;
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break;
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}
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}
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if ( ! $autosave_is_different ) {
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wp_delete_post_revision( $old_autosave->ID );
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return new WP_Error(
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'rest_autosave_no_changes',
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__( 'There is nothing to save. The autosave and the post content are the same.' ),
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array( 'status' => 400 )
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);
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}
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/** This filter is documented in wp-admin/post.php */
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do_action( 'wp_creating_autosave', $new_autosave );
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// wp_update_post() expects escaped array.
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return wp_update_post( wp_slash( $new_autosave ) );
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}
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// Create the new autosave as a special post revision.
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return _wp_put_post_revision( $post_data, true );
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}
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/**
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* Prepares the revision for the REST response.
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*
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* @since 5.0.0
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* @since 5.9.0 Renamed `$post` to `$item` to match parent class for PHP 8 named parameter support.
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*
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* @param WP_Post $item Post revision object.
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* @param WP_REST_Request $request Request object.
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* @return WP_REST_Response Response object.
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*/
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public function prepare_item_for_response( $item, $request ) {
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// Restores the more descriptive, specific name for use within this method.
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$post = $item;
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$response = $this->revisions_controller->prepare_item_for_response( $post, $request );
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$fields = $this->get_fields_for_response( $request );
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if ( in_array( 'preview_link', $fields, true ) ) {
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$parent_id = wp_is_post_autosave( $post );
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$preview_post_id = false === $parent_id ? $post->ID : $parent_id;
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$preview_query_args = array();
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if ( false !== $parent_id ) {
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$preview_query_args['preview_id'] = $parent_id;
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$preview_query_args['preview_nonce'] = wp_create_nonce( 'post_preview_' . $parent_id );
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}
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$response->data['preview_link'] = get_preview_post_link( $preview_post_id, $preview_query_args );
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}
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$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
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$response->data = $this->add_additional_fields_to_object( $response->data, $request );
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$response->data = $this->filter_response_by_context( $response->data, $context );
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/**
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* Filters a revision returned from the REST API.
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*
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* Allows modification of the revision right before it is returned.
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*
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* @since 5.0.0
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*
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* @param WP_REST_Response $response The response object.
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* @param WP_Post $post The original revision object.
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* @param WP_REST_Request $request Request used to generate the response.
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*/
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return apply_filters( 'rest_prepare_autosave', $response, $post, $request );
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}
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/**
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* Retrieves the query params for the autosaves collection.
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*
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* @since 5.0.0
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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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return array(
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'context' => $this->get_context_param( array( 'default' => 'view' ) ),
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);
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}
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}
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