class.ilLanguageFactory.php

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<?php

declare(strict_types=1);

class ilLanguageFactory
{
    private static array $languages = array();

    public static function _getLanguage(string $a_lang_key = ''): ilLanguage
    {
        global $DIC;
        $lng = $DIC->language();

        if (!$a_lang_key) {
            if (is_object($lng)) {
                $a_lang_key = $lng->getDefaultLanguage();
            } else {
                $a_lang_key = "en";
            }
        }

        return self::$languages[$a_lang_key] ?? (self::$languages[$a_lang_key] = new ilLanguage($a_lang_key));
    }

    public static function _getLanguageOfUser(int $a_usr_id): ilLanguage
    {
        return self::_getLanguage(ilObjUser::_lookupLanguage($a_usr_id));
    }
}