sfFacebookConnect = function(api_key, signin_url)
{
  this.xd_receiver_path = "/sfFacebookConnectPlugin/xd_receiver.htm";
  this.api_key = api_key;
  this.signin_url = signin_url;
  this.callback = '';
  this.forward = '';
  
  this.init();
};
sfFacebookConnect.prototype.init = function()
{
  FB.init(this.api_key,this.xd_receiver_path, {
    permsToRequestOnConnect : "email,publish_stream"
    });
}
sfFacebookConnect.prototype.getSigninUrl = function()
{
  t_signin_url = this.signin_url;
  if(this.forward != undefined && this.forward != '')
  {
    t_signin_url += '?forward=' + this.forward; 
  }
  
  return t_signin_url;
}
sfFacebookConnect.prototype.gotoLoginPage = function()
{
  //console.log(this.getSigninUrl());
  document.location.href= this.getSigninUrl();
};
function facebook_prompt_permission(permission, callbackFunc) {
  FB.ensureInit(function() {
    //check is user already granted for this permission or not
    FB.Facebook.apiClient.users_hasAppPermission(permission,
     function(result) {
        // prompt offline permission
        if (result == 0) {
            // render the permission dialog
            FB.Connect.showPermissionDialog(permission, callbackFunc);
        } else {
            // permission already granted.
            callbackFunc(true);
        }
    });
  });
}
sfFacebookConnect.prototype.requireSession = function(forward, callback)
{
  this.forward = forward;
  if (callback==undefined)
  {
	var current_obj = this;
	callback = function(){current_obj.gotoLoginPage()};
  }
	FB.ensureInit(function(){FB.Connect.requireSession(callback)});

	/*facebook_prompt_permission('publish_stream', function(accepted) {
            if(accepted) {
							FB.ensureInit(function(){FB.Connect.requireSession(callback)});
            }else {
							FB.ensureInit(function(){FB.Connect.requireSession(callback)});
						}
    });*/
};

/*
 * Show the feed form. This would be typically called in response to the
 * onclick handler of a "Publish" button, or in the onload event after
 * the user submits a form with info that should be published.
 *
 */
sfFacebookConnect.prototype.publishFeedStory = function(form_bundle_id, template_data)
{
  // Load the feed form
  FB.ensureInit(
    function()
    {
      FB.Connect.showFeedDialog(form_bundle_id, template_data);
      //FB.Connect.showFeedDialog(form_bundle_id, template_data, null, null, FB.FeedStorySize.shortStory, FB.RequireConnect.promptConnect);
      
      // hide the "Loading feed story ..." div
      //ge('feed_loading').style.visibility = "hidden";
    }
  );
};

sfFacebookConnect.prototype.showPermissionsDialog = function (permissions, callback)
{
  FB.ensureInit(
    function()
    {
      FB.Connect.showPermissionDialog(permissions, callback);
    }
  );
}

sfFacebookConnect.prototype.streamPublish = function (message, attachment, action_links)
{
  FB.ensureInit(
    function()
    {
      FB.Connect.streamPublish(message, attachment, action_links);
    }
  );
}