<?php
/**
 * @package     Joomla.Site
 * @subpackage  mod_languages
 *
 * @copyright   Copyright (C) 2005 - 2014 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

defined('_JEXEC') or die;

JLoader::register('MenusHelper', JPATH_ADMINISTRATOR . '/components/com_menus/helpers/menus.php');

/**
 * Helper for mod_languages
 *
 * @package     Joomla.Site
 * @subpackage  mod_languages
 *
 * @since       1.6.0
 */
abstract class ModLanguagesHelper
{
	/**
	 * Gets a list of available languages
	 *
	 * @param   JRegistry  &$params  module params
	 *
	 * @return  array
	 */
	public static function getList(&$params)
	{
		$user	= JFactory::getUser();
		$lang 	= JFactory::getLanguage();
		$app	= JFactory::getApplication();
		$menu 	= $app->getMenu();

		// Get menu home items
		$homes = array();

		foreach ($menu->getMenu() as $item)
		{
			if ($item->home)
			{
				$homes[$item->language] = $item;
			}
		}

		// Load associations
		$assoc = JLanguageAssociations::isEnabled();

		if ($assoc)
		{
			$active = $menu->getActive();

			if ($active)
			{
				$associations = MenusHelper::getAssociations($active->id);
			}

			// Load component associations
			$option = $app->input->get('option');
			$eName = JString::ucfirst(JString::str_ireplace('com_', '', $option));
			$cName = JString::ucfirst($eName . 'HelperAssociation');
			JLoader::register($cName, JPath::clean(JPATH_COMPONENT_SITE . '/helpers/association.php'));

			if (class_exists($cName) && is_callable(array($cName, 'getAssociations')))
			{
				$cassociations = call_user_func(array($cName, 'getAssociations'));
			}
		}

		$levels		= $user->getAuthorisedViewLevels();
		$languages	= JLanguageHelper::getLanguages();
		$activeLanguage = JFactory::getLanguage()->getTag();

		// Filter allowed languages
		foreach ($languages as $i => &$language)
		{
			// Do not display language without frontend UI
			if (!JLanguage::exists($language->lang_code))
			{
				unset($languages[$i]);
			}
			// Do not display language without specific home menu
			elseif (!isset($homes[$language->lang_code]))
			{
				unset($languages[$i]);
			}
			// Do not display language without authorized access level
			elseif (isset($language->access) && $language->access && !in_array($language->access, $levels))
			{
				unset($languages[$i]);
			}
			else
			{
				$language->active = $language->lang_code == $lang->getTag();

				if (JLanguageMultilang::isEnabled())
				{
					if (isset($cassociations[$language->lang_code]))
					{
						$language->link = JRoute::_($cassociations[$language->lang_code] . '&lang=' . $language->sef);
					}
					elseif (isset($associations[$language->lang_code]) && $menu->getItem($associations[$language->lang_code]))
					{
						$itemid = $associations[$language->lang_code];

						if ($app->get('sef') == '1')
						{
							$language->link = JRoute::_('index.php?lang=' . $language->sef . '&Itemid=' . $itemid);
						}
						else
						{
							$language->link = 'index.php?lang=' . $language->sef . '&amp;Itemid=' . $itemid;
						}
					}
					else
					{
						if ($language->lang_code == $activeLanguage)
						{
							$language->link = JUri::current();
						}
						elseif ($app->get('sef') == '1')
						{
							$itemid = isset($homes[$language->lang_code]) ? $homes[$language->lang_code]->id : $homes['*']->id;
							$language->link = JRoute::_('index.php?lang=' . $language->sef . '&Itemid=' . $itemid);
						}
						else
						{
							$language->link = 'index.php?lang=' . $language->sef;
						}
					}
				}
				else
				{
					$language->link = JRoute::_('&Itemid=' . $homes['*']->id);
				}
			}
		}

		return $languages;
	}
}
