Angularjs watching for route change

app_routechange.js

app.run(function($rootScope, $location) {
    $rootScope.$on( "$routeChangeStart", function(event, next, current) {
      if ($rootScope.loggedInUser == null) {
        // no logged user, redirect to /login
        if ( next.templateUrl === "partials/login.html") {
        } else {
          $location.path("/login");
        }
      }
    });