Rest API: move hook that handles wp_navigation post type schema to WP_Navigation_Fallback

src/wp-includes/class-wp-navigation-fallback.php

@@ -16,6 +16,44 @@
  * @since 6.3.0
  */
 class WP_Navigation_Fallback {
+	/**
+	 * Updates the wp_navigation custom post type schema,
+	 * in order to expose additional fields in the
+	 * embeddable links of WP_REST_Navigation_Fallback_Controller.
+	 * Used with the `rest_wp_navigation_item_schema` hook.
+	 *
+	 * @since 6.3.0
+	 *
+	 * @param array $schema the schema for the `wp_navigation` post.
+	 * @return array the modified schema.
+	 */
+	public static function update_wp_navigation_post_schema( $schema ) {
+		// Expose top level fields.
+		$schema['properties']['status']['context']  = array_merge( $schema['properties']['status']['context'], array( 'embed' ) );
+		$schema['properties']['content']['context'] = array_merge( $schema['properties']['content']['context'], array( 'embed' ) );
+
+		/*
+		 * Exposes sub properties of content field.
+		 * These sub properties aren't exposed by the posts controller by default,
+		 * for requests where context is `embed`.
+		 *
+		 * @see WP_REST_Posts_Controller::get_item_schema()
+		 */
+		$schema['properties']['content']['properties']['raw']['context']           = array_merge( $schema['properties']['content']['properties']['raw']['context'], array( 'embed' ) );
+		$schema['properties']['content']['properties']['rendered']['context']      = array_merge( $schema['properties']['content']['properties']['rendered']['context'], array( 'embed' ) );
+		$schema['properties']['content']['properties']['block_version']['context'] = array_merge( $schema['properties']['content']['properties']['block_version']['context'], array( 'embed' ) );
+
+		/*
+		 * Exposes sub properties of title field.
+		 * These sub properties aren't exposed by the posts controller by default,
+		 * for requests where context is `embed`.
+		 *
+		 * @see WP_REST_Posts_Controller::get_item_schema()
+		 */
+		$schema['properties']['title']['properties']['raw']['context'] = array_merge( $schema['properties']['title']['properties']['raw']['context'], array( 'embed' ) );
+
+		return $schema;
+	}
 
 	/**
 	 * Gets (and/or creates) an appropriate fallback Navigation Menu.
@@ -25,7 +63,6 @@ class WP_Navigation_Fallback {
 	 * @return WP_Post|null the fallback Navigation Post or null.
 	 */
 	public static function get_fallback() {
-
 		/**
 		 * Filters whether or not a fallback should be created.
 		 *

src/wp-includes/default-filters.php

@@ -711,6 +711,9 @@
 add_action( 'setup_theme', 'wp_enable_block_templates' );
 add_action( 'wp_loaded', '_add_template_loader_filters' );
 
+// wp_navigation post type.
+add_filter( 'rest_wp_navigation_item_schema', array( 'WP_Navigation_Fallback', 'update_wp_navigation_post_schema' ), 22 );
+
 // Fluid typography.
 add_filter( 'render_block', 'wp_render_typography_support', 10, 2 );
 

src/wp-settings.php

@@ -354,7 +354,6 @@
 require ABSPATH . WPINC . '/block-supports/spacing.php';
 require ABSPATH . WPINC . '/block-supports/typography.php';
 require ABSPATH . WPINC . '/block-supports/settings.php';
-require ABSPATH . WPINC . '/navigation-fallback.php';
 require ABSPATH . WPINC . '/style-engine.php';
 require ABSPATH . WPINC . '/style-engine/class-wp-style-engine.php';
 require ABSPATH . WPINC . '/style-engine/class-wp-style-engine-css-declarations.php';