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<?php
/**
* @package Joomla.Libraries
* @subpackage Language
*
* @copyright Copyright (C) 2005 - 2016 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
defined('JPATH_PLATFORM') or die;
use Joomla\Registry\Registry;
/**
* Utitlity class for associations in multilang
*
* @since 3.1
*/
class JLanguageAssociations
{
/**
* Get the associations.
*
* @param string $extension The name of the component.
* @param string $tablename The name of the table.
* @param string $context The context
* @param integer $id The primary key value.
* @param string $pk The name of the primary key in the given $table.
* @param string $aliasField If the table has an alias field set it here. Null to not use it
* @param string $catField If the table has a catid field set it here. Null to not use it
*
* @return array The associated items
*
* @since 3.1
*
* @throws Exception
*/
public static function getAssociations($extension, $tablename, $context, $id, $pk = 'id', $aliasField = 'alias', $catField = 'catid')
{
// To avoid doing duplicate database queries.
static $multilanguageAssociations = array();
// Multilanguage association array key. If the key is already in the array we don't need to run the query again, just return it.
$queryKey = implode('|', func_get_args());
if (!isset($multilanguageAssociations[$queryKey]))
{
$multilanguageAssociations[$queryKey] = array();
$db = JFactory::getDbo();
$categoriesExtraSql = (($tablename === '#__categories') ? ' AND c2.extension = ' . $db->quote($extension) : '');
$query = $db->getQuery(true)
->select($db->quoteName('c2.language'))
->from($db->quoteName($tablename, 'c'))
->join('INNER', $db->quoteName('#__associations', 'a') . ' ON a.id = c.' . $db->quoteName($pk) . ' AND a.context=' . $db->quote($context))
->join('INNER', $db->quoteName('#__associations', 'a2') . ' ON a.key = a2.key')
->join('INNER', $db->quoteName($tablename, 'c2') . ' ON a2.id = c2.' . $db->quoteName($pk) . $categoriesExtraSql);
// Use alias field ?
if (!empty($aliasField))
{
$query->select(
$query->concatenate(
array(
$db->quoteName('c2.' . $pk),
$db->quoteName('c2.' . $aliasField),
),
':'
) . ' AS ' . $db->quoteName($pk)
);
}
else
{
$query->select($db->quoteName('c2.' . $pk));
}
// Use catid field ?
if (!empty($catField))
{
$query->join(
'INNER',
$db->quoteName('#__categories', 'ca') . ' ON ' . $db->quoteName('c2.' . $catField) . ' = ca.id AND ca.extension = ' . $db->quote($extension)
)
->select(
$query->concatenate(
array('ca.id', 'ca.alias'),
':'
) . ' AS ' . $db->quoteName($catField)
);
}
$query->where('c.' . $pk . ' = ' . (int) $id);
if ($tablename === '#__categories')
{
$query->where('c.extension = ' . $db->quote($extension));
}
$db->setQuery($query);
try
{
$items = $db->loadObjectList('language');
}
catch (RuntimeException $e)
{
throw new Exception($e->getMessage(), 500, $e);
}
if ($items)
{
foreach ($items as $tag => $item)
{
// Do not return itself as result
if ((int) $item->{$pk} != $id)
{
$multilanguageAssociations[$queryKey][$tag] = $item;
}
}
}
}
return $multilanguageAssociations[$queryKey];
}
/**
* Method to determine if the language filter Items Associations parameter is enabled.
* This works for both site and administrator.
*
* @return boolean True if the parameter is implemented; false otherwise.
*
* @since 3.2
*/
public static function isEnabled()
{
// Flag to avoid doing multiple database queries.
static $tested = false;
// Status of language filter parameter.
static $enabled = false;
if (JLanguageMultilang::isEnabled())
{
// If already tested, don't test again.
if (!$tested)
{
$plugin = JPluginHelper::getPlugin('system', 'languagefilter');
if (!empty($plugin))
{
$params = new Registry($plugin->params);
$enabled = (boolean) $params->get('item_associations', true);
}
$tested = true;
}
}
return $enabled;
}
}
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