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<?php
class Lang {
    
    private $lang = array();
    
    // Hold an instance of the class
    private static $instance;

    private function __construct() {
        $lang = array();
        if (!isset($_GET['lang']) && isset($_POST['lang'])){
            $_GET['lang'] = $_POST['lang'];
        }
        if(isset($_GET['lang'])){
            $language = $_GET['lang'];
            
            // register the session and set the cookie
            $_SESSION['lang'] = $language;
            setcookie("lang", $language, time() + (3600 * 24 * 30),'/',false);
            
        }else if(isSet($_SESSION['lang'])){
            $language = $_SESSION['lang'];
        }else if(isSet($_COOKIE['lang'])){
            $language = $_COOKIE['lang'];
        }else{
            global $da;
            
            $settingDao = new GenericDao('crud_settings', $da);
            
            $params = array();
            $params['conditions'] = array('setting_key = ?', array(sha1('general')));
            $setting = $settingDao->findFirst($params);
            $setting = unserialize($setting['setting_value']);
            
            $language = $setting['default_language'];
        }
        if (file_exists(APP.'/languages/lang.'.$language.'.php')){
            require_once APP.'/languages/lang.'.$language.'.php';
        }
        
        if (empty($lang)){
            require_once APP.'/languages/lang.default.php';
        }
        
        $this->lang = $lang;
    }

    // The singleton method
    public static function singleton(){
        if (!isset(self::$instance)){
            $c = __CLASS__;
            self::$instance = new $c;
        }

        return self::$instance;
    }
    
    public function line($line = ''){
        
        return (isset(self::$instance->lang[$line]))?self::$instance->lang[$line]:$line;
        
    }
}