diff -r be944660c56a -r 3d72ae0968f4 wp/wp-includes/rest-api/endpoints/class-wp-rest-block-pattern-categories-controller.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/rest-api/endpoints/class-wp-rest-block-pattern-categories-controller.php	Tue Sep 27 16:37:53 2022 +0200
@@ -0,0 +1,150 @@
+<?php
+/**
+ * REST API: WP_REST_Block_Pattern_Catergories_Controller class
+ *
+ * @package    WordPress
+ * @subpackage REST_API
+ * @since      6.0.0
+ */
+
+/**
+ * Core class used to access block pattern categories via the REST API.
+ *
+ * @since 6.0.0
+ *
+ * @see WP_REST_Controller
+ */
+class WP_REST_Block_Pattern_Categories_Controller extends WP_REST_Controller {
+
+	/**
+	 * Constructs the controller.
+	 *
+	 * @since 6.0.0
+	 */
+	public function __construct() {
+		$this->namespace = 'wp/v2';
+		$this->rest_base = 'block-patterns/categories';
+	}
+
+	/**
+	 * Registers the routes for the objects of the controller.
+	 *
+	 * @since 6.0.0
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_items' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Checks whether a given request has permission to read block patterns.
+	 *
+	 * @since 6.0.0
+	 *
+	 * @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_items_permissions_check( $request ) {
+		if ( current_user_can( 'edit_posts' ) ) {
+			return true;
+		}
+
+		foreach ( get_post_types( array( 'show_in_rest' => true ), 'objects' ) as $post_type ) {
+			if ( current_user_can( $post_type->cap->edit_posts ) ) {
+				return true;
+			}
+		}
+
+		return new WP_Error(
+			'rest_cannot_view',
+			__( 'Sorry, you are not allowed to view the registered block pattern categories.' ),
+			array( 'status' => rest_authorization_required_code() )
+		);
+	}
+
+	/**
+	 * Retrieves all block pattern categories.
+	 *
+	 * @since 6.0.0
+	 *
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|WP_REST_Response Response object on success, or WP_Error object on failure.
+	 */
+	public function get_items( $request ) {
+		$response   = array();
+		$categories = WP_Block_Pattern_Categories_Registry::get_instance()->get_all_registered();
+		foreach ( $categories as $category ) {
+			$prepared_category = $this->prepare_item_for_response( $category, $request );
+			$response[]        = $this->prepare_response_for_collection( $prepared_category );
+		}
+
+		return rest_ensure_response( $response );
+	}
+
+	/**
+	 * Prepare a raw block pattern category before it gets output in a REST API response.
+	 *
+	 * @since 6.0.0
+	 *
+	 * @param array           $item    Raw category as registered, before any changes.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
+	 */
+	public function prepare_item_for_response( $item, $request ) {
+		$fields = $this->get_fields_for_response( $request );
+		$keys   = array( 'name', 'label' );
+		$data   = array();
+		foreach ( $keys as $key ) {
+			if ( rest_is_field_included( $key, $fields ) ) {
+				$data[ $key ] = $item[ $key ];
+			}
+		}
+
+		$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 block pattern category schema, conforming to JSON Schema.
+	 *
+	 * @since 6.0.0
+	 *
+	 * @return array Item schema data.
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'block-pattern-category',
+			'type'       => 'object',
+			'properties' => array(
+				'name'  => array(
+					'description' => __( 'The category name.' ),
+					'type'        => 'string',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit', 'embed' ),
+				),
+				'label' => array(
+					'description' => __( 'The category label, in human readable format.' ),
+					'type'        => 'string',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit', 'embed' ),
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+}