first commit

libraries/cms/language/multilang.php

@@ -0,0 +1,66 @@
+<?php
+/**
+ * @package     Joomla.Libraries
+ * @subpackage  Language
+ *
+ * @copyright   Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+defined('JPATH_PLATFORM') or die;
+
+/**
+ * Utitlity class for multilang
+ *
+ * @package     Joomla.Libraries
+ * @subpackage  Language
+ * @since       2.5.4
+ */
+class JLanguageMultilang
+{
+	/**
+	 * Method to determine if the language filter plugin is enabled.
+	 * This works for both site and administrator.
+	 *
+	 * @return  boolean  True if site is supporting multiple languages; false otherwise.
+	 *
+	 * @since   2.5.4
+	 */
+	public static function isEnabled()
+	{
+		// Flag to avoid doing multiple database queries.
+		static $tested = false;
+
+		// Status of language filter plugin.
+		static $enabled = false;
+
+		// Get application object.
+		$app = JFactory::getApplication();
+
+		// If being called from the front-end, we can avoid the database query.
+		if ($app->isSite())
+		{
+			$enabled = $app->getLanguageFilter();
+			return $enabled;
+		}
+
+		// If already tested, don't test again.
+		if (!$tested)
+		{
+			// Determine status of language filter plug-in.
+			$db = JFactory::getDbo();
+			$query = $db->getQuery(true)
+				->select('enabled')
+				->from($db->quoteName('#__extensions'))
+				->where($db->quoteName('type') . ' = ' . $db->quote('plugin'))
+				->where($db->quoteName('folder') . ' = ' . $db->quote('system'))
+				->where($db->quoteName('element') . ' = ' . $db->quote('languagefilter'));
+			$db->setQuery($query);
+
+			$enabled = $db->loadResult();
+			$tested = true;
+		}
+
+		return $enabled;
+	}
+}