private function post_facebook($data=null){
        $result = "";
        require_once (ROOT. "/apps/configuration/models/ConfigurationItem.php");
        require_once (ROOT . "/components/facebook/facebook.php");
        
        $this->ConfigurationItem = new ConfigurationItem($this->getContext());

        $row=$this->ConfigurationItem->findByCatKeyItemKey('system','facebook_login');
        $apiid=$row['value'];

        $row=$this->ConfigurationItem->findByCatKeyItemKey('system','facebook_pass');
        $secret=$row['value'];
        
        $facebook = new Facebook(array(
          'appId'  => $apiid,
          'secret' => $secret,
          'cookie' => true,
        ));
        
        //Facebook zainicjowany
        
        //Pobierz status sesji
        $session = $facebook->getSession();
        $me = null;
        if ($session) {
            try {
                $uid = $facebook->getUser();
                $me = $facebook->api('/me');
            } catch (FacebookApiException $e) {
                error_log($e);
            }
            $message=$data['facebook_text'];
            $attachment = array(
                'message' => $data['facebook_text'],
                'name' => $data['name'],
                'link' => $this->getLinkToLatestNews(),
                'description' => '',
            );
            
            if($data['thumb_file_tree_id'] !== NULL) $attachment['picture'] = 'http://'.$_SERVER['HTTP_HOST']."media/file/image_by_id/".$data['thumb_file_tree_id']."/?w=400&h=500";
            
            try {
                $facebook->api('/162618213751448/feed/', 'post', $attachment);
                $result = "Facebook: Poprawnie wysłano";
            } catch (FacebookApiException $e) {
                $result = "Facebook: Nie wysłano";
                error_log($e);
            }
        } else {
            $login_url = $facebook->getLoginUrl();
            header("Location: ".$login_url);
            exit;
        }
        
        return $result;

    }