diff -r 7b1b88e27a20 -r 48c4eec2b7e6 wp/wp-includes/rest-api/endpoints/class-wp-rest-global-styles-revisions-controller.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/rest-api/endpoints/class-wp-rest-global-styles-revisions-controller.php	Fri Sep 05 18:40:08 2025 +0200
@@ -0,0 +1,394 @@
+<?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_Revisions_Controller {
+	/**
+	 * Parent controller.
+	 *
+	 * @since 6.6.0
+	 * @var WP_REST_Controller
+	 */
+	private $parent_controller;
+
+	/**
+	 * The base of the parent controller's route.
+	 *
+	 * @since 6.3.0
+	 * @var string
+	 */
+	protected $parent_base;
+
+	/**
+	 * Parent post type.
+	 *
+	 * @since 6.6.0
+	 * @var string
+	 */
+	protected $parent_post_type;
+
+	/**
+	 * Constructor.
+	 *
+	 * @since 6.3.0
+	 * @since 6.6.0 Extends class from WP_REST_Revisions_Controller.
+	 *
+	 * @param string $parent_post_type Post type of the parent.
+	 */
+	public function __construct( $parent_post_type = 'wp_global_styles' ) {
+		parent::__construct( $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_Global_Styles_Controller( $parent_post_type );
+		}
+
+		$this->parent_controller = $parent_controller;
+		$this->rest_base         = 'revisions';
+		$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 controller's routes.
+	 *
+	 * @since 6.3.0
+	 * @since 6.6.0 Added route to fetch individual global styles revisions.
+	 */
+	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_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(
+				'args'   => array(
+					'parent' => array(
+						'description' => __( 'The ID for the parent of the global styles revision.' ),
+						'type'        => 'integer',
+					),
+					'id'     => array(
+						'description' => __( 'Unique identifier for the global styles revision.' ),
+						'type'        => 'integer',
+					),
+				),
+				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' ) ),
+					),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * 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 = (int) 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;
+	}
+
+	/**
+	 * Prepares the revision for the REST response.
+	 *
+	 * @since 6.3.0
+	 * @since 6.6.0 Added resolved URI links to the response.
+	 *
+	 * @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();
+		$theme_json = null;
+
+		if ( ! empty( $global_styles_config['styles'] ) || ! empty( $global_styles_config['settings'] ) ) {
+			$theme_json           = new WP_Theme_JSON( $global_styles_config, 'custom' );
+			$global_styles_config = $theme_json->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 );
+		$response            = rest_ensure_response( $data );
+		$resolved_theme_uris = WP_Theme_JSON_Resolver::get_resolved_theme_uris( $theme_json );
+
+		if ( ! empty( $resolved_theme_uris ) ) {
+			$response->add_links(
+				array(
+					'https://api.w.org/theme-file' => $resolved_theme_uris,
+				)
+			);
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Retrieves the revision's schema, conforming to JSON Schema.
+	 *
+	 * @since 6.3.0
+	 * @since 6.6.0 Merged parent and parent controller schema data.
+	 *
+	 * @return array Item schema data.
+	 */
+	public function get_item_schema() {
+		if ( $this->schema ) {
+			return $this->add_additional_fields_schema( $this->schema );
+		}
+
+		$schema               = parent::get_item_schema();
+		$parent_schema        = $this->parent_controller->get_item_schema();
+		$schema['properties'] = array_merge( $schema['properties'], $parent_schema['properties'] );
+
+		unset(
+			$schema['properties']['guid'],
+			$schema['properties']['slug'],
+			$schema['properties']['meta'],
+			$schema['properties']['content'],
+			$schema['properties']['title']
+		);
+
+			$this->schema = $schema;
+
+		return $this->add_additional_fields_schema( $this->schema );
+	}
+
+	/**
+	 * Retrieves the query params for collections.
+	 * Removes params that are not supported by global styles revisions.
+	 *
+	 * @since 6.6.0
+	 *
+	 * @return array Collection parameters.
+	 */
+	public function get_collection_params() {
+		$query_params = parent::get_collection_params();
+		unset(
+			$query_params['exclude'],
+			$query_params['include'],
+			$query_params['search'],
+			$query_params['order'],
+			$query_params['orderby']
+		);
+		return $query_params;
+	}
+}