gistfile1.js

var FBSIY = {
  postTemplateId:null,
  favoriteTemplateId:null,
  
  init:function(){
    FB_RequireFeatures(["XFBML"], function()
    {
        FB.Facebook.init(window.api_key, "/facebook_sessions/finish_login/xd_receiver.htm");    
    });
  },
  
  ensure_init: function(callback) {
    if(!window.api_key) {
      window.alert("api_key is not set");
    }
  
    if(window.is_initialized) {
      callback();
    } else {
      FB_RequireFeatures(["XFBML"], function() {
          // FB.FBDebug.logLevel = 4;
    //       FB.FBDebug.isEnabled = true;
          
          FB.Facebook.init(window.api_key, "/facebook_sessions/facebook_finish/xd_receiver.htm");
  
          window.is_initialized = true;
          callback();
        });
    }
  },
  
  showFeedDialog: function(){
    this.ensure_init(function() {      
      FB.Connect.showFeedDialog("39681117843", {'description':'some description'});      
    });
  },
  
  postToFeed: function(data){          
    FB.Connect.showFeedDialog(this.postTemplateId, data);          
  },
  
  favoriteToFeed: function(data){    
    FB.Connect.showFeedDialog(this.favoriteTemplateId, data);
  },  
 
 login: function() {
    FB.Connect.requireSession();
    this.ensure_init(function() {      
      FB.Facebook.get_sessionState().waitUntilReady(function() {
          var user = FB.Facebook.apiClient.get_session() ? FB.Facebook.apiClient.get_session().uid : null;
          window.location = '/facebook_sessions/authenticate';
        });
    });
  }
}