Linkshortener initialize AngularJS app

app.js

(function(angular) {
  var linkApp = angular.module('linkApp', []);
}(angular));

LinkController.js

(function (angular) {
  'use strict';

  angular
    .module('linkApp')
    .controller('LinkController', ['$scope', '$log', 'LinkService', function LinkController($scope, $log, LinkService) {
      $scope.longUrl = null;
      $scope.link = null;

      $scope.shorten = function (url) {

        if (url) {
          $log.log('Try to shorten: ' + url);
          var promise = LinkService.shorten(url);

          promise.then(function (link) {
            $scope.link = link;
          });

        }

      };
    }]);
})(angular);

LinkService.js

(function (angular) {
  'use strict';

  angular
    .module('linkApp')
    .service('LinkService', ['$http', '$q', '$log', function LinkService($http, $q, $log) {

      return {

        shorten: function (url) {
          var deferred = $q.defer();

          $http.get('/links?longUrl='+url)
            .success(function(data) {
              return deferred.resolve(data);
            }).error(function(data) {
              return deferred.resolve(data);
            });

          return deferred.promise;
        }
      };
    }]);
})(angular);