Facebook loader ember RSVP promises

gistfile1.txt

var FacebookLoader = Ember.Object.create({
  setup: function(settings) {
    this.loadScript().then(function(fb) {
      console.log('in setup callabck');
    });
  },
  loadScript: function() {
    return new Ember.RSVP.Promise(function(resolve) {
      window.fbAsyncInit = function() {
        resolve();
        console.log('in fbAsyncInit');
      };
      (function(d){
       var js, id = 'facebook-jssdk', ref = d.getElementsByTagName('script')[0];
       if (d.getElementById(id)) {return;}
       js = d.createElement('script'); js.id = id; js.async = true;
       js.src = "//connect.facebook.net/en_US/all.js";
       ref.parentNode.insertBefore(js, ref);
      }(document));
    });
  }
});