angular

// service.js
app
	.factory('authService', ['$http', function ($http) {
		var auth = {
			isAuth: false,
			user: null
		};

		$http
			.get('/api/session')
			.success(function (data) {
				auth.isAuth = data.value.isAuth;
				auth.user = data.value.user;
				return auth;
			});
	}]);
	
// app.js
app.run(function ($location, $rootScope, $route, authService) {
	$rootScope.$on('$routeChangeStart', function(evt, next, current) {
		if (next.requireAuth && !authService.isAuth) {
			next.templateUrl = 'views/special/403.html';
		}
	});
});

app.config(['$routeProvider', function ($routeProvider) {
	$routeProvider.when('/user/:user_id/group', {requireAuth: true, controller: 'groupIndexCtrl', templateUrl: 'views/group/index.html'});
	$routeProvider.when('/group/new',           {requireAuth: true, controller: 'groupNewCtrl',   templateUrl: 'views/group/new.html'});
}]);