1<?php
2/**
3 * @package     Joomla.Site
4 * @subpackage  mod_languages
5 *
6 * @copyright   Copyright (C) 2005 - 2020 Open Source Matters, Inc. All rights reserved.
7 * @license     GNU General Public License version 2 or later; see LICENSE.txt
8 */
9
10defined('_JEXEC') or die;
11
12JLoader::register('MenusHelper', JPATH_ADMINISTRATOR . '/components/com_menus/helpers/menus.php');
13
14/**
15 * Helper for mod_languages
16 *
17 * @since  1.6
18 */
19abstract class ModLanguagesHelper
20{
21	/**
22	 * Gets a list of available languages
23	 *
24	 * @param   \Joomla\Registry\Registry  &$params  module params
25	 *
26	 * @return  array
27	 */
28	public static function getList(&$params)
29	{
30		$user		= JFactory::getUser();
31		$lang		= JFactory::getLanguage();
32		$languages	= JLanguageHelper::getLanguages();
33		$app		= JFactory::getApplication();
34		$menu		= $app->getMenu();
35		$active		= $menu->getActive();
36
37		// Get menu home items
38		$homes = array();
39		$homes['*'] = $menu->getDefault('*');
40
41		foreach ($languages as $item)
42		{
43			$default = $menu->getDefault($item->lang_code);
44
45			if ($default && $default->language === $item->lang_code)
46			{
47				$homes[$item->lang_code] = $default;
48			}
49		}
50
51		// Load associations
52		$assoc = JLanguageAssociations::isEnabled();
53
54		if ($assoc)
55		{
56			if ($active)
57			{
58				$associations = MenusHelper::getAssociations($active->id);
59			}
60
61			// Load component associations
62			$option = $app->input->get('option');
63			$class = ucfirst(str_replace('com_', '', $option)) . 'HelperAssociation';
64			\JLoader::register($class, JPATH_SITE . '/components/' . $option . '/helpers/association.php');
65
66			if (class_exists($class) && is_callable(array($class, 'getAssociations')))
67			{
68				$cassociations = call_user_func(array($class, 'getAssociations'));
69			}
70		}
71
72		$levels    = $user->getAuthorisedViewLevels();
73		$sitelangs = JLanguageHelper::getInstalledLanguages(0);
74		$multilang = JLanguageMultilang::isEnabled();
75
76		// Filter allowed languages
77		foreach ($languages as $i => &$language)
78		{
79			// Do not display language without frontend UI
80			if (!array_key_exists($language->lang_code, $sitelangs))
81			{
82				unset($languages[$i]);
83			}
84			// Do not display language without specific home menu
85			elseif (!isset($homes[$language->lang_code]))
86			{
87				unset($languages[$i]);
88			}
89			// Do not display language without authorized access level
90			elseif (isset($language->access) && $language->access && !in_array($language->access, $levels))
91			{
92				unset($languages[$i]);
93			}
94			else
95			{
96				$language->active = ($language->lang_code === $lang->getTag());
97
98				// Fetch language rtl
99				// If loaded language get from current JLanguage metadata
100				if ($language->active)
101				{
102					$language->rtl = $lang->isRtl();
103				}
104				// If not loaded language fetch metadata directly for performance
105				else
106				{
107					$languageMetadata = JLanguageHelper::getMetadata($language->lang_code);
108					$language->rtl    = $languageMetadata['rtl'];
109				}
110
111				if ($multilang)
112				{
113					if (isset($cassociations[$language->lang_code]))
114					{
115						$language->link = JRoute::_($cassociations[$language->lang_code] . '&lang=' . $language->sef);
116					}
117					elseif (isset($associations[$language->lang_code]) && $menu->getItem($associations[$language->lang_code]))
118					{
119						$itemid = $associations[$language->lang_code];
120						$language->link = JRoute::_('index.php?lang=' . $language->sef . '&Itemid=' . $itemid);
121					}
122					elseif ($active && $active->language == '*')
123					{
124						$language->link = JRoute::_('index.php?lang=' . $language->sef . '&Itemid=' . $active->id);
125					}
126					else
127					{
128						if ($language->active)
129						{
130							$language->link = JUri::getInstance()->toString(array('path', 'query'));
131						}
132						else
133						{
134							$itemid = isset($homes[$language->lang_code]) ? $homes[$language->lang_code]->id : $homes['*']->id;
135							$language->link = JRoute::_('index.php?lang=' . $language->sef . '&Itemid=' . $itemid);
136						}
137					}
138				}
139				else
140				{
141					$language->link = JRoute::_('&Itemid=' . $homes['*']->id);
142				}
143			}
144		}
145
146		return $languages;
147	}
148}
149