AngularFire - Wait until user data is retrieved in controller

Question

The user registers with username, email, and password. I authenticate using FirebaseSimpleLogin with the email, take the user id, and then load my user using the user id: ``` var ref = new Firebase(FIREBASE_URL + 'users'); // data containing user information var users = $firebase(ref); $rootScope.$on('$firebaseSimpleLogin:login', function (e, authUser) { // wait until authenticated var query = $firebase(ref.startAt(authUser.uid).endAt(authUser.uid)); // find user by uid query.$on('loaded', function () { setCurrentUser(query.$getIndex()[0]); // get username from query }); }); function setCurrentUser (username) { $rootScope.currentUser = User.findByUsername(username); } ``` Now, my problem is that I would like to redirect to the user profile page if I am logged in in my HomeCtrl: ``` app.controller('HomeCtrl', function ($rootScope, $scope, $location, Auth, User) { // wait for current user to be set // if signed in // location.path('/user/' + currentUser.username); }); ``` Unfortunately,…

Accepted Answer

Try resolving the route for your users. Take the plunker demo below for example.

Plunker Demo

The app is just a simple login page to a profile page. It has a `HomeCtrl` that navigates to a `ResolveCtrl` (which is the profile page) after a login.

The `HomeCtrl` just manages a login view. When a user is successfully logged in we navigate to the profile page. (The Auth object is a custom wrapper I made available in the Plunker).

```
.controller('HomeCtrl', function($scope, Auth, $window) {
  $scope.user = {
    email: 'bob@email.com',
    password: 'password'
  };
  $scope.login = function() {
    Auth.login('password', $scope.user);
  };
  
  Auth.onLogin(function(e, user) {
    console.log('logged in!');
    $window.location.href = '#/resolve';
  });
  
})
```

Now that we're logged in we'll go the `ResolveCtrl`. This controller resolves the current user before it has been loaded. That's the `data` parameter.

```
.controller('ResolveCtrl', function($scope, $route, data) {
  $scope.user = data;
})
```

But where is that parameter coming from? We can set a resolve object in our $routeProvider. This tells the `ResolveCtrl` it can't load until we've resolved this promise. Since the Auth.getCurrentUser() returns a promise we just need to return that and it will get resolved for us.

```
.config(['$routeProvider',
  function($routeProvider) {
    $routeProvider
      .when('/', {
        templateUrl: '_home.html',
        controller: 'HomeCtrl',
      })
      .when('/resolve', {
        templateUrl: '_resolve.html',
        controller: 'ResolveCtrl',
        resolve: {
          data: function(Auth) {
           // load the user before the view is loaded
           return Auth.getCurrentUser();
          }
        }
      })
      .otherwise({
        redirectTo: '/'
      });
  }
])
```

Now when the page gets loaded we know that the user will be there.

AngularFire - Wait until user data is retrieved in controller

Solution

Problem