helper.php

<?php
/**
 * @version     1.0.0
 * @package     mod_steamlogin
 * @copyright   Copyright (C) 2013. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 * @author      DZ Team <dev@dezign.vn> - dezign.vn
 */

// no direct access
defined( '_JEXEC' ) or die( 'Restricted access' );

abstract class modSteamLoginHelper
{
    public static function getReturnURL($params, $type)
    {
        $app    = JFactory::getApplication();
        $router = $app->getRouter();
        $url = null;
        if ($itemid = $params->get($type))
        {
            $db     = JFactory::getDbo();
            $query  = $db->getQuery(true)
                ->select($db->quoteName('link'))
                ->from($db->quoteName('#__menu'))
                ->where($db->quoteName('published') . '=1')
                ->where($db->quoteName('id') . '=' . $db->quote($itemid));

            $db->setQuery($query);
            if ($link = $db->loadResult())
            {
                if ($router->getMode() == JROUTER_MODE_SEF)
                {
                    $url = 'index.php?Itemid='.$itemid;
                }
                else {
                    $url = $link.'&Itemid='.$itemid;
                }
            }
        }
        if (!$url)
        {
            $url = self::getCurrentUrl();
        }

        return $url;
    }

    public static function getCurrentUrl()
    {
        $url = null;

        // Stay on the same page
        $uri = clone JUri::getInstance();
        $app    = JFactory::getApplication();
        $router = $app->getRouter();
        $vars = $router->parse($uri);
        unset($vars['lang']);
        if ($router->getMode() == JROUTER_MODE_SEF)
        {
            if (isset($vars['Itemid']))
            {
                $itemid = $vars['Itemid'];
                $menu = $app->getMenu();
                $item = $menu->getItem($itemid);
                unset($vars['Itemid']);
                if (isset($item) && $vars == $item->query)
                {
                    $url = 'index.php?Itemid='.$itemid;
                }
                else {
                    $url = 'index.php?'.JUri::buildQuery($vars).'&Itemid='.$itemid;
                }
            }
            else
            {
                $url = 'index.php?'.JUri::buildQuery($vars);
            }
        }
        else
        {
            $url = 'index.php?'.JUri::buildQuery($vars);
        }

        return $url;
    }

    public static function getType()
    {
        $user = JFactory::getUser();
        return (!$user->get('guest')) ? 'logout' : 'login';
    }
}