Ionic Google OAuth Authentication, Firebase 3 and (ngCordovaOauth plugin or cordova-plugin-googleplus)

app.js

angular.module('App', ['ionic', 'ngCordova', 'ngAnimate', 'ngCordovaOauth', 'firebase'])

.run(['$ionicPlatform', 
      '$rootScope',
      '$firebaseAuth',
      function($ionicPlatform, $rootScope, $firebaseAuth) {

  $ionicPlatform.ready(function() {
    if(window.cordova && window.cordova.plugins.Keyboard) {
      // Hide the accessory bar by default (remove this to show the accessory bar above the keyboard
      // for form inputs)
      cordova.plugins.Keyboard.hideKeyboardAccessoryBar(true);

      // Don't remove this line unless you know what you are doing. It stops the viewport
      // from snapping when text inputs are focused. Ionic handles this internally for
      // a much nicer keyboard experience.
      cordova.plugins.Keyboard.disableScroll(true);
    }
    if(window.StatusBar) {
      StatusBar.styleDefault();
    }
  });

  $firebaseAuth().$onAuthStateChanged(function(user) {
      $rootScope.user = user;
  });
}])

auth-new.js

//https://github.com/EddyVerbruggen/cordova-plugin-googleplus

(function(firebase) {
'use strict';

    angular
        .module('App')
        .factory('Auth', Auth);

    Auth.$inject = ['$q', 'myConfig'];
    function Auth($q, myConfig) {
        
        var _nativeLogin = function(){
          return $q(function(resolve, reject) {
            window.plugins.googleplus.login(
              {
                'scopes': 'email profile',
                'webClientId': myConfig.googleClientId
                'offline': true,
              },
              function (obj) {
                resolve(obj)
              },
              function (msg) {
                reject(msg);
              }
            );
          });
        }
      
        return {
            login : function () {
                if(ionic.Platform.isWebView()){
                    return _nativeLogin().then(function (result) {
                        var credential = firebase.auth.GoogleAuthProvider.credential(result.idToken);
                        return firebase.auth().signInWithCredential(credential);
                    });
                }
                else{
                    var provider = new firebase.auth.GoogleAuthProvider();
                    provider.addScope('email');
                    provider.addScope('profile');
                    return firebase.auth().signInWithPopup(provider);
                }
            }
        };
    }
})(firebase);

auth-old.js

//Google scopes - https://developers.google.com/identity/protocols/googlescopes
//myConfig - Angular constants
(function(firebase) {
'use strict';

    angular
        .module('App')
        .factory('Auth', Auth);

    Auth.$inject = ['$cordovaOauth', 'myConfig'];
    function Auth($cordovaOauth, myConfig) {
        
        return {
            login : function () {
                if(ionic.Platform.isWebView()){
                    return $cordovaOauth.google(myConfig.googleClientId + '&include_profile=true', ["email", "profile"]).then(function (result) {
                        var credential = firebase.auth.GoogleAuthProvider.credential(result.id_token);
                        return firebase.auth().signInWithCredential(credential);
                    });
                }
                else{
                    var provider = new firebase.auth.GoogleAuthProvider();
                    provider.addScope('email');
                    provider.addScope('profile');
                    return firebase.auth().signInWithPopup(provider);
                }
            }
        };
    }
})(firebase);

@ilman it's a pleasure!
@enklenke Hola man, es por eso que en mi ejemplo estoy utilizando un plugin de cordova cuando la aplicación se abre en el móvil, por lo cual funciona tanto en desktop como en el móvil! 👍

hola @jdnichollsc, el código funciona perfecto, tienes idea de como funciona el login anonimo?

I don't know about Anonymous login. Guys, my example was updated using the native way with cordova-plugin-googleplus

Where were you 6 months ago!, haha great plugin thank you for your work!.

@alxanthony haha you're welcome!