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+<?php
+/**
+ * REST API: WP_REST_Global_Styles_Revisions_Controller class
+ *
+ * @package WordPress
+ * @subpackage REST_API
+ * @since 6.3.0
+ */
+
+/**
+ * Core class used to access global styles revisions via the REST API.
+ *
+ * @since 6.3.0
+ *
+ * @see WP_REST_Controller
+ */
+class WP_REST_Global_Styles_Revisions_Controller extends WP_REST_Controller {
+ /**
+ * Parent post type.
+ *
+ * @since 6.3.0
+ * @var string
+ */
+ protected $parent_post_type;
+
+ /**
+ * The base of the parent controller's route.
+ *
+ * @since 6.3.0
+ * @var string
+ */
+ protected $parent_base;
+
+ /**
+ * Constructor.
+ *
+ * @since 6.3.0
+ */
+ public function __construct() {
+ $this->parent_post_type = 'wp_global_styles';
+ $this->rest_base = 'revisions';
+ $this->parent_base = 'global-styles';
+ $this->namespace = 'wp/v2';
+ }
+
+ /**
+ * Registers the controller's routes.
+ *
+ * @since 6.3.0
+ */
+ public function register_routes() {
+ register_rest_route(
+ $this->namespace,
+ '/' . $this->parent_base . '/(?P<parent>[\d]+)/' . $this->rest_base,
+ array(
+ 'args' => array(
+ 'parent' => array(
+ 'description' => __( 'The ID for the parent of the revision.' ),
+ 'type' => 'integer',
+ ),
+ ),
+ array(
+ 'methods' => WP_REST_Server::READABLE,
+ 'callback' => array( $this, 'get_items' ),
+ 'permission_callback' => array( $this, 'get_item_permissions_check' ),
+ 'args' => $this->get_collection_params(),
+ ),
+ 'schema' => array( $this, 'get_public_item_schema' ),
+ )
+ );
+ }
+
+ /**
+ * Retrieves the query params for collections.
+ *
+ * Inherits from WP_REST_Controller::get_collection_params(),
+ * also reflects changes to return value WP_REST_Revisions_Controller::get_collection_params().
+ *
+ * @since 6.3.0
+ *
+ * @return array Collection parameters.
+ */
+ public function get_collection_params() {
+ $collection_params = parent::get_collection_params();
+ $collection_params['context']['default'] = 'view';
+ $collection_params['offset'] = array(
+ 'description' => __( 'Offset the result set by a specific number of items.' ),
+ 'type' => 'integer',
+ );
+ unset( $collection_params['search'] );
+ unset( $collection_params['per_page']['default'] );
+
+ return $collection_params;
+ }
+
+ /**
+ * Returns decoded JSON from post content string,
+ * or a 404 if not found.
+ *
+ * @since 6.3.0
+ *
+ * @param string $raw_json Encoded JSON from global styles custom post content.
+ * @return Array|WP_Error
+ */
+ protected function get_decoded_global_styles_json( $raw_json ) {
+ $decoded_json = json_decode( $raw_json, true );
+
+ if ( is_array( $decoded_json ) && isset( $decoded_json['isGlobalStylesUserThemeJSON'] ) && true === $decoded_json['isGlobalStylesUserThemeJSON'] ) {
+ return $decoded_json;
+ }
+
+ return new WP_Error(
+ 'rest_global_styles_not_found',
+ __( 'Cannot find user global styles revisions.' ),
+ array( 'status' => 404 )
+ );
+ }
+
+ /**
+ * Returns paginated revisions of the given global styles config custom post type.
+ *
+ * The bulk of the body is taken from WP_REST_Revisions_Controller->get_items,
+ * but global styles does not require as many parameters.
+ *
+ * @since 6.3.0
+ *
+ * @param WP_REST_Request $request The request instance.
+ * @return WP_REST_Response|WP_Error
+ */
+ public function get_items( $request ) {
+ $parent = $this->get_parent( $request['parent'] );
+
+ if ( is_wp_error( $parent ) ) {
+ return $parent;
+ }
+
+ $global_styles_config = $this->get_decoded_global_styles_json( $parent->post_content );
+
+ if ( is_wp_error( $global_styles_config ) ) {
+ return $global_styles_config;
+ }
+
+ if ( wp_revisions_enabled( $parent ) ) {
+ $registered = $this->get_collection_params();
+ $query_args = array(
+ 'post_parent' => $parent->ID,
+ 'post_type' => 'revision',
+ 'post_status' => 'inherit',
+ 'posts_per_page' => -1,
+ 'orderby' => 'date ID',
+ 'order' => 'DESC',
+ );
+
+ $parameter_mappings = array(
+ 'offset' => 'offset',
+ 'page' => 'paged',
+ 'per_page' => 'posts_per_page',
+ );
+
+ foreach ( $parameter_mappings as $api_param => $wp_param ) {
+ if ( isset( $registered[ $api_param ], $request[ $api_param ] ) ) {
+ $query_args[ $wp_param ] = $request[ $api_param ];
+ }
+ }
+
+ $revisions_query = new WP_Query();
+ $revisions = $revisions_query->query( $query_args );
+ $offset = isset( $query_args['offset'] ) ? (int) $query_args['offset'] : 0;
+ $page = (int) $query_args['paged'];
+ $total_revisions = $revisions_query->found_posts;
+
+ if ( $total_revisions < 1 ) {
+ // Out-of-bounds, run the query again without LIMIT for total count.
+ unset( $query_args['paged'], $query_args['offset'] );
+ $count_query = new WP_Query();
+ $count_query->query( $query_args );
+
+ $total_revisions = $count_query->found_posts;
+ }
+
+ if ( $revisions_query->query_vars['posts_per_page'] > 0 ) {
+ $max_pages = ceil( $total_revisions / (int) $revisions_query->query_vars['posts_per_page'] );
+ } else {
+ $max_pages = $total_revisions > 0 ? 1 : 0;
+ }
+ if ( $total_revisions > 0 ) {
+ if ( $offset >= $total_revisions ) {
+ return new WP_Error(
+ 'rest_revision_invalid_offset_number',
+ __( 'The offset number requested is larger than or equal to the number of available revisions.' ),
+ array( 'status' => 400 )
+ );
+ } elseif ( ! $offset && $page > $max_pages ) {
+ return new WP_Error(
+ 'rest_revision_invalid_page_number',
+ __( 'The page number requested is larger than the number of pages available.' ),
+ array( 'status' => 400 )
+ );
+ }
+ }
+ } else {
+ $revisions = array();
+ $total_revisions = 0;
+ $max_pages = 0;
+ $page = (int) $request['page'];
+ }
+
+ $response = array();
+
+ foreach ( $revisions as $revision ) {
+ $data = $this->prepare_item_for_response( $revision, $request );
+ $response[] = $this->prepare_response_for_collection( $data );
+ }
+
+ $response = rest_ensure_response( $response );
+
+ $response->header( 'X-WP-Total', (int) $total_revisions );
+ $response->header( 'X-WP-TotalPages', (int) $max_pages );
+
+ $request_params = $request->get_query_params();
+ $base_path = rest_url( sprintf( '%s/%s/%d/%s', $this->namespace, $this->parent_base, $request['parent'], $this->rest_base ) );
+ $base = add_query_arg( urlencode_deep( $request_params ), $base_path );
+
+ if ( $page > 1 ) {
+ $prev_page = $page - 1;
+
+ if ( $prev_page > $max_pages ) {
+ $prev_page = $max_pages;
+ }
+
+ $prev_link = add_query_arg( 'page', $prev_page, $base );
+ $response->link_header( 'prev', $prev_link );
+ }
+ if ( $max_pages > $page ) {
+ $next_page = $page + 1;
+ $next_link = add_query_arg( 'page', $next_page, $base );
+
+ $response->link_header( 'next', $next_link );
+ }
+
+ return $response;
+ }
+
+ /**
+ * Checks the post_date_gmt or modified_gmt and prepare any post or
+ * modified date for single post output.
+ *
+ * Duplicate of WP_REST_Revisions_Controller::prepare_date_response.
+ *
+ * @since 6.3.0
+ *
+ * @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 );
+ }
+
+ /**
+ * Prepares the revision for the REST response.
+ *
+ * @since 6.3.0
+ *
+ * @param WP_Post $post Post revision object.
+ * @param WP_REST_Request $request Request object.
+ * @return WP_REST_Response|WP_Error Response object.
+ */
+ public function prepare_item_for_response( $post, $request ) {
+ $parent = $this->get_parent( $request['parent'] );
+ $global_styles_config = $this->get_decoded_global_styles_json( $post->post_content );
+
+ if ( is_wp_error( $global_styles_config ) ) {
+ return $global_styles_config;
+ }
+
+ $fields = $this->get_fields_for_response( $request );
+ $data = array();
+
+ if ( ! empty( $global_styles_config['styles'] ) || ! empty( $global_styles_config['settings'] ) ) {
+ $global_styles_config = ( new WP_Theme_JSON( $global_styles_config, 'custom' ) )->get_raw_data();
+ if ( rest_is_field_included( 'settings', $fields ) ) {
+ $data['settings'] = ! empty( $global_styles_config['settings'] ) ? $global_styles_config['settings'] : new stdClass();
+ }
+ if ( rest_is_field_included( 'styles', $fields ) ) {
+ $data['styles'] = ! empty( $global_styles_config['styles'] ) ? $global_styles_config['styles'] : new stdClass();
+ }
+ }
+
+ if ( rest_is_field_included( 'author', $fields ) ) {
+ $data['author'] = (int) $post->post_author;
+ }
+
+ if ( rest_is_field_included( 'date', $fields ) ) {
+ $data['date'] = $this->prepare_date_response( $post->post_date_gmt, $post->post_date );
+ }
+
+ if ( rest_is_field_included( 'date_gmt', $fields ) ) {
+ $data['date_gmt'] = $this->prepare_date_response( $post->post_date_gmt );
+ }
+
+ if ( rest_is_field_included( 'id', $fields ) ) {
+ $data['id'] = (int) $post->ID;
+ }
+
+ if ( rest_is_field_included( 'modified', $fields ) ) {
+ $data['modified'] = $this->prepare_date_response( $post->post_modified_gmt, $post->post_modified );
+ }
+
+ if ( rest_is_field_included( 'modified_gmt', $fields ) ) {
+ $data['modified_gmt'] = $this->prepare_date_response( $post->post_modified_gmt );
+ }
+
+ if ( rest_is_field_included( 'parent', $fields ) ) {
+ $data['parent'] = (int) $parent->ID;
+ }
+
+ $context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+ $data = $this->add_additional_fields_to_object( $data, $request );
+ $data = $this->filter_response_by_context( $data, $context );
+
+ return rest_ensure_response( $data );
+ }
+
+ /**
+ * Retrieves the revision's schema, conforming to JSON Schema.
+ *
+ * @since 6.3.0
+ *
+ * @return array Item schema data.
+ */
+ public function get_item_schema() {
+ if ( $this->schema ) {
+ return $this->add_additional_fields_schema( $this->schema );
+ }
+
+ $schema = array(
+ '$schema' => 'http://json-schema.org/draft-04/schema#',
+ 'title' => "{$this->parent_post_type}-revision",
+ 'type' => 'object',
+ // Base properties for every revision.
+ 'properties' => array(
+
+ /*
+ * Adds settings and styles from the WP_REST_Revisions_Controller item fields.
+ * Leaves out GUID as global styles shouldn't be accessible via URL.
+ */
+ 'author' => array(
+ 'description' => __( 'The ID for the author of the revision.' ),
+ 'type' => 'integer',
+ 'context' => array( 'view', 'edit', 'embed' ),
+ ),
+ 'date' => array(
+ 'description' => __( "The date the revision was published, in the site's timezone." ),
+ 'type' => 'string',
+ 'format' => 'date-time',
+ 'context' => array( 'view', 'edit', 'embed' ),
+ ),
+ 'date_gmt' => array(
+ 'description' => __( 'The date the revision was published, as GMT.' ),
+ 'type' => 'string',
+ 'format' => 'date-time',
+ 'context' => array( 'view', 'edit' ),
+ ),
+ 'id' => array(
+ 'description' => __( 'Unique identifier for the revision.' ),
+ 'type' => 'integer',
+ 'context' => array( 'view', 'edit', 'embed' ),
+ ),
+ 'modified' => array(
+ 'description' => __( "The date the revision was last modified, in the site's timezone." ),
+ 'type' => 'string',
+ 'format' => 'date-time',
+ 'context' => array( 'view', 'edit' ),
+ ),
+ 'modified_gmt' => array(
+ 'description' => __( 'The date the revision was last modified, as GMT.' ),
+ 'type' => 'string',
+ 'format' => 'date-time',
+ 'context' => array( 'view', 'edit' ),
+ ),
+ 'parent' => array(
+ 'description' => __( 'The ID for the parent of the revision.' ),
+ 'type' => 'integer',
+ 'context' => array( 'view', 'edit', 'embed' ),
+ ),
+
+ // Adds settings and styles from the WP_REST_Global_Styles_Controller parent schema.
+ 'styles' => array(
+ 'description' => __( 'Global styles.' ),
+ 'type' => array( 'object' ),
+ 'context' => array( 'view', 'edit' ),
+ ),
+ 'settings' => array(
+ 'description' => __( 'Global settings.' ),
+ 'type' => array( 'object' ),
+ 'context' => array( 'view', 'edit' ),
+ ),
+ ),
+ );
+
+ $this->schema = $schema;
+
+ return $this->add_additional_fields_schema( $this->schema );
+ }
+
+ /**
+ * Checks if a given request has access to read a single global style.
+ *
+ * @since 6.3.0
+ *
+ * @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_item_permissions_check( $request ) {
+ $post = $this->get_parent( $request['parent'] );
+ if ( is_wp_error( $post ) ) {
+ return $post;
+ }
+
+ /*
+ * The same check as WP_REST_Global_Styles_Controller::get_item_permissions_check.
+ */
+ if ( ! current_user_can( 'read_post', $post->ID ) ) {
+ return new WP_Error(
+ 'rest_cannot_view',
+ __( 'Sorry, you are not allowed to view revisions for this global style.' ),
+ array( 'status' => rest_authorization_required_code() )
+ );
+ }
+
+ return true;
+ }
+
+ /**
+ * Gets the parent post, if the ID is valid.
+ *
+ * Duplicate of WP_REST_Revisions_Controller::get_parent.
+ *
+ * @since 6.3.0
+ *
+ * @param int $parent_post_id Supplied ID.
+ * @return WP_Post|WP_Error Post object if ID is valid, WP_Error otherwise.
+ */
+ protected function get_parent( $parent_post_id ) {
+ $error = new WP_Error(
+ 'rest_post_invalid_parent',
+ __( 'Invalid post parent ID.' ),
+ array( 'status' => 404 )
+ );
+
+ if ( (int) $parent_post_id <= 0 ) {
+ return $error;
+ }
+
+ $parent_post = get_post( (int) $parent_post_id );
+
+ if ( empty( $parent_post ) || empty( $parent_post->ID )
+ || $this->parent_post_type !== $parent_post->post_type
+ ) {
+ return $error;
+ }
+
+ return $parent_post;
+ }
+}