--- /dev/null
+<?php
+/**
+ * REST API: WP_REST_Revisions_Controller class
+ *
+ * @package WordPress
+ * @subpackage REST_API
+ * @since 4.7.0
+ */
+
+/**
+ * Core class used to access revisions via the REST API.
+ *
+ * @since 4.7.0
+ *0
+ * @see WP_REST_Controller
+ */
+class WP_REST_Revisions_Controller extends WP_REST_Controller {
+
+ /**
+ * Parent post type.
+ *
+ * @since 4.7.0
+ * @access private
+ * @var string
+ */
+ private $parent_post_type;
+
+ /**
+ * Parent controller.
+ *
+ * @since 4.7.0
+ * @access private
+ * @var WP_REST_Controller
+ */
+ private $parent_controller;
+
+ /**
+ * The base of the parent controller's route.
+ *
+ * @since 4.7.0
+ * @access private
+ * @var string
+ */
+ private $parent_base;
+
+ /**
+ * Constructor.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @param string $parent_post_type Post type of the parent.
+ */
+ public function __construct( $parent_post_type ) {
+ $this->parent_post_type = $parent_post_type;
+ $this->parent_controller = new WP_REST_Posts_Controller( $parent_post_type );
+ $this->namespace = 'wp/v2';
+ $this->rest_base = 'revisions';
+ $post_type_object = get_post_type_object( $parent_post_type );
+ $this->parent_base = ! empty( $post_type_object->rest_base ) ? $post_type_object->rest_base : $post_type_object->name;
+ }
+
+ /**
+ * Registers routes for revisions based on post types supporting revisions.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @see register_rest_route()
+ */
+ public function register_routes() {
+
+ register_rest_route( $this->namespace, '/' . $this->parent_base . '/(?P<parent>[\d]+)/' . $this->rest_base, array(
+ array(
+ 'methods' => WP_REST_Server::READABLE,
+ 'callback' => array( $this, 'get_items' ),
+ 'permission_callback' => array( $this, 'get_items_permissions_check' ),
+ 'args' => $this->get_collection_params(),
+ ),
+ '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(
+ array(
+ 'methods' => WP_REST_Server::READABLE,
+ 'callback' => array( $this, 'get_item' ),
+ 'permission_callback' => array( $this, 'get_item_permissions_check' ),
+ 'args' => array(
+ 'context' => $this->get_context_param( array( 'default' => 'view' ) ),
+ ),
+ ),
+ array(
+ 'methods' => WP_REST_Server::DELETABLE,
+ 'callback' => array( $this, 'delete_item' ),
+ 'permission_callback' => array( $this, 'delete_item_permissions_check' ),
+ 'args' => array(
+ 'force' => array(
+ 'type' => 'boolean',
+ 'default' => false,
+ 'description' => __( 'Required to be true, as revisions do not support trashing.' ),
+ ),
+ ),
+ ),
+ 'schema' => array( $this, 'get_public_item_schema' ),
+ ));
+
+ }
+
+ /**
+ * Checks if a given request has access to get revisions.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @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 = get_post( $request['parent'] );
+ if ( ! $parent ) {
+ return true;
+ }
+ $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 revisions of this post.' ), array( 'status' => rest_authorization_required_code() ) );
+ }
+
+ return true;
+ }
+
+ /**
+ * Gets a collection of revisions.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @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 = get_post( $request['parent'] );
+ if ( ! $request['parent'] || ! $parent || $this->parent_post_type !== $parent->post_type ) {
+ return new WP_Error( 'rest_post_invalid_parent', __( 'Invalid post parent ID.' ), array( 'status' => 404 ) );
+ }
+
+ $revisions = wp_get_post_revisions( $request['parent'] );
+
+ $response = array();
+ foreach ( $revisions as $revision ) {
+ $data = $this->prepare_item_for_response( $revision, $request );
+ $response[] = $this->prepare_response_for_collection( $data );
+ }
+ return rest_ensure_response( $response );
+ }
+
+ /**
+ * Checks if a given request has access to get a specific revision.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @param WP_REST_Request $request Full data about the request.
+ * @return bool|WP_Error True if the request has read access for the item, WP_Error object otherwise.
+ */
+ public function get_item_permissions_check( $request ) {
+ return $this->get_items_permissions_check( $request );
+ }
+
+ /**
+ * Retrieves one revision from the collection.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @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_item( $request ) {
+ $parent = get_post( $request['parent'] );
+ if ( ! $request['parent'] || ! $parent || $this->parent_post_type !== $parent->post_type ) {
+ return new WP_Error( 'rest_post_invalid_parent', __( 'Invalid post parent ID.' ), array( 'status' => 404 ) );
+ }
+
+ $revision = get_post( $request['id'] );
+ if ( ! $revision || 'revision' !== $revision->post_type ) {
+ return new WP_Error( 'rest_post_invalid_id', __( 'Invalid revision ID.' ), array( 'status' => 404 ) );
+ }
+
+ $response = $this->prepare_item_for_response( $revision, $request );
+ return rest_ensure_response( $response );
+ }
+
+ /**
+ * Checks if a given request has access to delete a revision.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @param WP_REST_Request $request Full details about the request.
+ * @return bool|WP_Error True if the request has access to delete the item, WP_Error object otherwise.
+ */
+ public function delete_item_permissions_check( $request ) {
+
+ $response = $this->get_items_permissions_check( $request );
+ if ( ! $response || is_wp_error( $response ) ) {
+ return $response;
+ }
+
+ $post = get_post( $request['id'] );
+ if ( ! $post ) {
+ return new WP_Error( 'rest_post_invalid_id', __( 'Invalid revision ID.' ), array( 'status' => 404 ) );
+ }
+ $post_type = get_post_type_object( 'revision' );
+ return current_user_can( $post_type->cap->delete_post, $post->ID );
+ }
+
+ /**
+ * Deletes a single revision.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @param WP_REST_Request $request Full details about the request.
+ * @return true|WP_Error True on success, or WP_Error object on failure.
+ */
+ public function delete_item( $request ) {
+ $force = isset( $request['force'] ) ? (bool) $request['force'] : false;
+
+ // We don't support trashing for revisions.
+ if ( ! $force ) {
+ return new WP_Error( 'rest_trash_not_supported', __( 'Revisions do not support trashing. Set force=true to delete.' ), array( 'status' => 501 ) );
+ }
+
+ $revision = get_post( $request['id'] );
+ $previous = $this->prepare_item_for_response( $revision, $request );
+
+ $result = wp_delete_post( $request['id'], true );
+
+ /**
+ * Fires after a revision is deleted via the REST API.
+ *
+ * @since 4.7.0
+ *
+ * @param (mixed) $result The revision object (if it was deleted or moved to the trash successfully)
+ * or false (failure). If the revision was moved to to the trash, $result represents
+ * its new state; if it was deleted, $result represents its state before deletion.
+ * @param WP_REST_Request $request The request sent to the API.
+ */
+ do_action( 'rest_delete_revision', $result, $request );
+
+ if ( ! $result ) {
+ return new WP_Error( 'rest_cannot_delete', __( 'The post cannot be deleted.' ), array( 'status' => 500 ) );
+ }
+
+ $response = new WP_REST_Response();
+ $response->set_data( array( 'deleted' => true, 'previous' => $previous->get_data() ) );
+ return $response;
+ }
+
+ /**
+ * Prepares the revision for the REST response.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @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 ) {
+
+ $schema = $this->get_item_schema();
+
+ $data = array();
+
+ if ( ! empty( $schema['properties']['author'] ) ) {
+ $data['author'] = $post->post_author;
+ }
+
+ if ( ! empty( $schema['properties']['date'] ) ) {
+ $data['date'] = $this->prepare_date_response( $post->post_date_gmt, $post->post_date );
+ }
+
+ if ( ! empty( $schema['properties']['date_gmt'] ) ) {
+ $data['date_gmt'] = $this->prepare_date_response( $post->post_date_gmt );
+ }
+
+ if ( ! empty( $schema['properties']['id'] ) ) {
+ $data['id'] = $post->ID;
+ }
+
+ if ( ! empty( $schema['properties']['modified'] ) ) {
+ $data['modified'] = $this->prepare_date_response( $post->post_modified_gmt, $post->post_modified );
+ }
+
+ if ( ! empty( $schema['properties']['modified_gmt'] ) ) {
+ $data['modified_gmt'] = $this->prepare_date_response( $post->post_modified_gmt );
+ }
+
+ if ( ! empty( $schema['properties']['parent'] ) ) {
+ $data['parent'] = (int) $post->post_parent;
+ }
+
+ if ( ! empty( $schema['properties']['slug'] ) ) {
+ $data['slug'] = $post->post_name;
+ }
+
+ if ( ! empty( $schema['properties']['guid'] ) ) {
+ $data['guid'] = array(
+ /** This filter is documented in wp-includes/post-template.php */
+ 'rendered' => apply_filters( 'get_the_guid', $post->guid ),
+ 'raw' => $post->guid,
+ );
+ }
+
+ if ( ! empty( $schema['properties']['title'] ) ) {
+ $data['title'] = array(
+ 'raw' => $post->post_title,
+ 'rendered' => get_the_title( $post->ID ),
+ );
+ }
+
+ if ( ! empty( $schema['properties']['content'] ) ) {
+
+ $data['content'] = array(
+ 'raw' => $post->post_content,
+ /** This filter is documented in wp-includes/post-template.php */
+ 'rendered' => apply_filters( 'the_content', $post->post_content ),
+ );
+ }
+
+ if ( ! empty( $schema['properties']['excerpt'] ) ) {
+ $data['excerpt'] = array(
+ 'raw' => $post->post_excerpt,
+ 'rendered' => $this->prepare_excerpt_response( $post->post_excerpt, $post ),
+ );
+ }
+
+ $context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+ $data = $this->add_additional_fields_to_object( $data, $request );
+ $data = $this->filter_response_by_context( $data, $context );
+ $response = rest_ensure_response( $data );
+
+ if ( ! empty( $data['parent'] ) ) {
+ $response->add_link( 'parent', rest_url( sprintf( '%s/%s/%d', $this->namespace, $this->parent_base, $data['parent'] ) ) );
+ }
+
+ /**
+ * Filters a revision returned from the API.
+ *
+ * Allows modification of the revision right before it is returned.
+ *
+ * @since 4.7.0
+ *
+ * @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_revision', $response, $post, $request );
+ }
+
+ /**
+ * Checks the post_date_gmt or modified_gmt and prepare any post or
+ * modified date for single post output.
+ *
+ * @since 4.7.0
+ * @access protected
+ *
+ * @param string $date_gmt GMT publication time.
+ * @param string|null $date Optional. Local publication time. Default null.
+ * @return string|null ISO8601/RFC3339 formatted datetime, otherwise null.
+ */
+ protected function prepare_date_response( $date_gmt, $date = null ) {
+ if ( '0000-00-00 00:00:00' === $date_gmt ) {
+ return null;
+ }
+
+ if ( isset( $date ) ) {
+ return mysql_to_rfc3339( $date );
+ }
+
+ return mysql_to_rfc3339( $date_gmt );
+ }
+
+ /**
+ * Retrieves the revision's schema, conforming to JSON Schema.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @return array Item schema data.
+ */
+ public function get_item_schema() {
+ $schema = array(
+ '$schema' => 'http://json-schema.org/schema#',
+ 'title' => "{$this->parent_post_type}-revision",
+ 'type' => 'object',
+ // Base properties for every Revision.
+ 'properties' => array(
+ 'author' => array(
+ 'description' => __( 'The ID for the author of the object.' ),
+ 'type' => 'integer',
+ 'context' => array( 'view', 'edit', 'embed' ),
+ ),
+ 'date' => array(
+ 'description' => __( "The date the object was published, in the site's timezone." ),
+ 'type' => 'string',
+ 'format' => 'date-time',
+ 'context' => array( 'view', 'edit', 'embed' ),
+ ),
+ 'date_gmt' => array(
+ 'description' => __( 'The date the object was published, as GMT.' ),
+ 'type' => 'string',
+ 'format' => 'date-time',
+ 'context' => array( 'view', 'edit' ),
+ ),
+ 'guid' => array(
+ 'description' => __( 'GUID for the object, as it exists in the database.' ),
+ 'type' => 'string',
+ 'context' => array( 'view', 'edit' ),
+ ),
+ 'id' => array(
+ 'description' => __( 'Unique identifier for the object.' ),
+ 'type' => 'integer',
+ 'context' => array( 'view', 'edit', 'embed' ),
+ ),
+ 'modified' => array(
+ 'description' => __( "The date the object was last modified, in the site's timezone." ),
+ 'type' => 'string',
+ 'format' => 'date-time',
+ 'context' => array( 'view', 'edit' ),
+ ),
+ 'modified_gmt' => array(
+ 'description' => __( 'The date the object was last modified, as GMT.' ),
+ 'type' => 'string',
+ 'format' => 'date-time',
+ 'context' => array( 'view', 'edit' ),
+ ),
+ 'parent' => array(
+ 'description' => __( 'The ID for the parent of the object.' ),
+ 'type' => 'integer',
+ 'context' => array( 'view', 'edit', 'embed' ),
+ ),
+ 'slug' => array(
+ 'description' => __( 'An alphanumeric identifier for the object unique to its type.' ),
+ 'type' => 'string',
+ 'context' => array( 'view', 'edit', 'embed' ),
+ ),
+ ),
+ );
+
+ $parent_schema = $this->parent_controller->get_item_schema();
+
+ if ( ! empty( $parent_schema['properties']['title'] ) ) {
+ $schema['properties']['title'] = $parent_schema['properties']['title'];
+ }
+
+ if ( ! empty( $parent_schema['properties']['content'] ) ) {
+ $schema['properties']['content'] = $parent_schema['properties']['content'];
+ }
+
+ if ( ! empty( $parent_schema['properties']['excerpt'] ) ) {
+ $schema['properties']['excerpt'] = $parent_schema['properties']['excerpt'];
+ }
+
+ if ( ! empty( $parent_schema['properties']['guid'] ) ) {
+ $schema['properties']['guid'] = $parent_schema['properties']['guid'];
+ }
+
+ return $this->add_additional_fields_schema( $schema );
+ }
+
+ /**
+ * Retrieves the query params for collections.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @return array Collection parameters.
+ */
+ public function get_collection_params() {
+ return array(
+ 'context' => $this->get_context_param( array( 'default' => 'view' ) ),
+ );
+ }
+
+ /**
+ * Checks the post excerpt and prepare it for single post output.
+ *
+ * @since 4.7.0
+ * @access protected
+ *
+ * @param string $excerpt The post excerpt.
+ * @param WP_Post $post Post revision object.
+ * @return string Prepared excerpt or empty string.
+ */
+ protected function prepare_excerpt_response( $excerpt, $post ) {
+
+ /** This filter is documented in wp-includes/post-template.php */
+ $excerpt = apply_filters( 'the_excerpt', $excerpt, $post );
+
+ if ( empty( $excerpt ) ) {
+ return '';
+ }
+
+ return $excerpt;
+ }
+}
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