add a menu endpoint to the wordpress rest api

wordpress-api-menu.php

/**
 * 
 * @param  array $data       options
 * @return array|null       an array of links
 */
function find_menu( WP_REST_Request $data ) {

	$menu = wp_get_nav_menu_items( $data['name'] );


	if ( empty( $menu ) ) {
		return rest_ensure_response(new WP_Error( 'no menu', 'Invalid menu', array( 'status' => 404 )));
	}

	// @todo
	// $response = new WP_REST_Response( $menu );
	// $response->set_status( 201 );
	// $response->header( 'Location', 'http://google.com' );

	return rest_ensure_response($menu);
}

add_action( 'rest_api_init', function() {
	register_rest_route( 'find/v1', '/menu', array(
		'methods' => 'GET',
		'callback' => 'find_menu',
		'args' => array(
			'name' => array(
				'validate_callback' => function( $param, $request, $key ) {
					return is_string( $param );
				},
				//'sanitize_callback' => 'absint'
			)
		)
	) );
} );