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<?php
/* --------------------------------------------------------------
   LanguageHelperInterface.inc.php 2015-12-09 gm
   Gambio GmbH
   http://www.gambio.de
   Copyright (c) 2015 Gambio GmbH
   Released under the GNU General Public License (Version 2)
   [http://www.gnu.org/licenses/gpl-2.0.html]
   --------------------------------------------------------------
*/

/**
 * Class LanguageHelperInterface
 *
 * @category   System
 * @package    Extensions
 * @subpackage Helpers
 */
interface LanguageHelperInterface
{
    /**
     * Gets the corresponding language code for the given ID
     * 
     * @param IdType $id
     *
     * @return LanguageCode
     */
    public function getLanguageCodeById(IdType $id);
    
    
    /**
     * Gets all language codes in a KeyValueCollection with language ID as key
     *
     * @param BoolType $onlyActiveLanguages
     * 
     * @return KeyValueCollection
     */
    public function getLanguageCodes(BoolType $onlyActiveLanguages = null);
    
    
    /**
     * Gets the language codes of all active languages in a KeyValueCollection
     * 
     * @return KeyValueCollection
     */
    public function getActiveLanguageCodes();
}