Angular js state authentication

app.js

//config.js

for every state you want to check if user has logged in or not set requireLogin to true.

...,
 data : {
        requireLogin : true
        },
.....


// app.js

app.run(function ($rootScope) {

  $rootScope.$on('$stateChangeStart', function (event, toState, toParams) {
    var requireLogin = toState.data.requireLogin;

    if (requireLogin && typeof $rootScope.currentUser === 'undefined') {
      
      console.log('login required');
      event.preventDefault();
      
    }
  });

});

// services.js

    .service('Auth', function ($modal, $rootScope) {

      function assignCurrentUser (user) {
        $rootScope.currentUser = user;
        return user;
      }

      return function() {
        var instance = $modal.open({
          templateUrl: 'views/loginModalTemplate.html',
          controller: 'LoginModalCtrl',
          controllerAs: 'LoginModalCtrl'
        })

        return instance.result.then(assignCurrentUser);
      };

    })