errors http interceptor

gistfile1.js

angular.module('myapp').config([ '$httpProvider', function ($httpProvider) {
    $httpProvider.interceptors.push('globalErrorInterceptor');
}]);
angular.module('myapp').factory('globalErrorInterceptor', ['$q', '$rootScope', '$cookieStore', '$injector', '$location', 'PathService', 'AlertService',
  function ($q, $rootScope, $cookieStore, $injector, $location, Path,  Alert) {
    $rootScope.showSpinner = false;
    $rootScope.http = null;
    return {
      'response': function (response) {
        return response || $q.when(response)
      },
      'responseError': function (rejection) {
        switch (rejection.status) {
          case 401:
            $location.path("/login")
            $cookieStore.put('currentUser', undefined)
            Alert.add("warning", 'You must be logged in to perform that action', 1400 )
            break;
          case 404:
            Alert.add("danger", 'The requested resource couldn\'t be located', 1400 )
            break;
          case 422:
            var validationErrors = [];
            angular.forEach(rejection.data.errors, function(value, key){
              validationErrors.push(key + " " +  value.join(', '))
            });
            console.log(validationErrors.join(', ') )
            Alert.add('danger', validationErrors.join(', ') )
            break;
          case 500:
            Alert.add("danger",'Server internal error: ' + rejection.data)
            break;
        }
        return $q.reject(rejection);
      }
    }
  }
]);