service for $cordovaGoogleAnalytics

example_usage_in_controllers.js

GA.startTrackerWithId('UA-70824422-1');
GA.trackView('News');
GA.addCustomDimension('Type', 'tips');

services.js

/**
 * The $cordovaGoogleAnalytics can't be used directly in controllers until analytics is available.
 * So I package $cordovaGoogleAnalytics into a GA service.
 * For every $cordovaGoogleAnalytics method, this service ensure the core analytics is available.
 * The problem is I found I repeat myself a lot for every method.
 * Is there a better implementation for this service??
 */
angular.module('app.services', [])
.factory('GA', function($q, $cordovaGoogleAnalytics) {
  var service = {
    _initCount: 0,
    /**
     * Initialize $cordovaGoogleAnalytics when analytics is available
     * @return {Promise}
     */
    _init: function(){
      var d = $q.defer();
      if(typeof analytics !== 'undefined'){
        service._initCount = 0;
        d.resolve();
      }else if(service._initCount > 50){
        d.reject();
      }else{
        service._initCount ++;
        setTimeout(function(){
          d.resolve(service._init());
        },500);
      }
      return d.promise;
    },
    startTrackerWithId: function(ID) {
      var d = $q.defer();
      service._init().then(function() {
        var r = $cordovaGoogleAnalytics.startTrackerWithId(ID);
        d.resolve(r);
      });
      return d.promise;
    },
    setUserId: function(username) {
      var d = $q.defer();
      service._init().then(function() {
        d.resolve($cordovaGoogleAnalytics.setUserId(username));
      });
      return d.promise;
    },
    trackView: function(name) {
      var d = $q.defer();
      service._init().then(function() {
        var r = $cordovaGoogleAnalytics.trackView(name);
        d.resolve(r);
      });
      return d.promise;
    },
    addCustomDimension: function(field, value) {
      var d = $q.defer();
      service._init().then(function() {
        d.resolve($cordovaGoogleAnalytics.addCustomDimension(field, value));
      });
      return d.promise;
    }
  };
  return service;
})
;