AngularJS: resources that handle PUT call for modifications

gistfile1.js

// Inspired from: http://kirkbushell.me/angular-js-using-ng-resource-in-a-more-restful-manner/

var resource = angular.module('Resource', ['ngResource']);
resource.factory('Resource', ['$resource', function($resource) {
	return function(url, params, methods) {
		var defaults = {
			update: { method: 'put', isArray: false },
			create: { method: 'post' }
		};

		methods = angular.extend(defaults, methods);

		var resource = $resource(url, params, methods);

		resource.prototype.$save = function(success, error) {
			if (!this.id) {
				return this.$create(success, error);
			}
			else {
				return this.$update(success, error);
			}
		};

		return resource;
	};
}]);


// HOW TO USE

var services = angular.module('services', ['Resource']);

services.factory('User', ['Resource', function($resource) {
	return $resource('/api/user/:id', {id: '@id'});
}]);

// In controllers: it works the same way as ngResource