--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/rest-api/endpoints/class-wp-rest-autosaves-controller.php Mon Oct 14 18:28:13 2019 +0200
@@ -0,0 +1,427 @@
+<?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_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_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 );
+
+ // Ensure that post type-specific controller logic is available.
+ $parent_controller_class = ! empty( $post_type_object->rest_controller_class ) ? $post_type_object->rest_controller_class : 'WP_REST_Posts_Controller';
+
+ $this->parent_controller = new $parent_controller_class( $post_type_object->name );
+ $this->revisions_controller = new WP_REST_Revisions_Controller( $parent_post_type );
+ $this->rest_namespace = 'wp/v2';
+ $this->rest_base = 'autosaves';
+ $this->parent_base = ! empty( $post_type_object->rest_base ) ? $post_type_object->rest_base : $post_type_object->name;
+ }
+
+ /**
+ * Registers routes for autosaves.
+ *
+ * @since 5.0.0
+ *
+ * @see register_rest_route()
+ */
+ public function register_routes() {
+ register_rest_route(
+ $this->rest_namespace,
+ '/' . $this->parent_base . '/(?P<id>[\d]+)/' . $this->rest_base,
+ array(
+ 'args' => array(
+ 'parent' => array(
+ 'description' => __( 'The ID for the parent of the object.' ),
+ '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->rest_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 object.' ),
+ 'type' => 'integer',
+ ),
+ 'id' => array(
+ 'description' => __( 'The ID for the object.' ),
+ '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 data 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;
+ }
+
+ $parent_post_type_obj = get_post_type_object( $parent->post_type );
+ if ( ! current_user_can( $parent_post_type_obj->cap->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();
+
+ if ( ( 'draft' === $post->post_status || 'auto-draft' === $post->post_status ) && $post->post_author == $user_id ) {
+ // 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 data 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 parent post 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 data 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 ( false !== strpos( $revision->post_name, "{$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() {
+ $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,
+ );
+
+ return $schema;
+ }
+
+ /**
+ * Creates autosave for the specified post.
+ *
+ * From wp-admin/post.php.
+ *
+ * @since 5.0.0
+ *
+ * @param mixed $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;
+ }
+
+ $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 ( $old_autosave ) {
+ $new_autosave = _wp_post_revision_data( $post_data, true );
+ $new_autosave['ID'] = $old_autosave->ID;
+ $new_autosave['post_author'] = $user_id;
+
+ // If the new autosave has the same content as the post, delete the autosave.
+ $autosave_is_different = false;
+
+ 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;
+ }
+ }
+
+ if ( ! $autosave_is_different ) {
+ wp_delete_post_revision( $old_autosave->ID );
+ return new WP_Error( 'rest_autosave_no_changes', __( 'There is nothing to save. The autosave and the post content are the same.' ), array( 'status' => 400 ) );
+ }
+
+ /**
+ * 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
+ *
+ * @param WP_Post $post Post revision object.
+ * @param WP_REST_Request $request Request object.
+ *
+ * @return WP_REST_Response Response object.
+ */
+ public function prepare_item_for_response( $post, $request ) {
+
+ $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 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' ) ),
+ );
+ }
+}