AngularJS - Need some combination of $routeChangeStart and $locationChangeStart

Question

My problem is actually very similar to the one found here:

AngularJs - cancel route change event

In short, I'm using $routeChangeStart and trying to change the current route using $location. When I do, the console shows me that the original page is still loads and is quickly overwritten by the new page.

The solution provided was to use $locationChangeStart instead of $routeChangeStart, which should work for preventing the extra redirect. Unfortunately, I'm using additional data in the $routeprovider that I need to access while changing the route (I use it to track page restrictions). Here's an example...

$routeProvider.
    when('/login', { controller: 'LoginCtrl', templateUrl: '/app/partial/login.html', access: false}).
    when('/home', { controller: 'HomeCtrl', templateUrl: '/app/partial/home.html', access: true}).
    otherwise({ redirectTo: '/login' });


$rootScope.$on('$routeChangeStart', function(event, next, current) {
    if(next.access){
        //Do Stuff
    }
    else{
        $location.path("/login");
        //This will load the current route first (ie: '/home'), and then
        //redirect the user to the correct 'login' route.
    }
});

With $routeChangeStart, I can use the "next" and "current" parameters (see AngularJS - $route) as objects to retrieve my 'access' values. With $locationChangeStart, those two parameters return url strings, not objects. So there seems to be no way to retrieve my 'access' values.

Is there any way I can combine the redirect-stopping power of $locationChangeStart with the object-flexibility of $routeChangeStart to achieve what I need?

Answer 1

One approach that comes to mind is trying to use the resolve parameter for this:

var resolver = function(access) {
  return {
    load: function($q) {
      if (access) { // fire $routeChangeSuccess
        var deferred = $q.defer();
        deferred.resolve();
        return deferred.promise;
      } else { // fire $routeChangeError
        return $q.reject("/login");
      }
    }
  }
}

$routeProvider.
  when('/login', { controller: 'LoginCtrl', templateUrl: '/app/partial/login.html', resolve: resolver(false)}).
  when('/home', { controller: 'HomeCtrl', templateUrl: '/app/partial/home.html', resolve: resolver(true)}).
  otherwise({ redirectTo: '/login' });

Please note that I haven't tested the code above but I'm doing similar stuff in my projects.