/**
* calls and sets the parent instance method, and if !MULTIPROVIDER
* checks if module_login_providers table is in the provider db.
*
* If found, use the provider DB else use the common
*
* @param string $dsn
*/
static function instance($dsn = null)
{
if (!MULTIPROVIDER && is_null($dsn)) {
$dsn = MultiPort::getDSN($GLOBALS['user_provider']);
}
$theInstance = parent::instance($dsn);
if (is_null(self::$dbToUse)) {
self::$dbToUse = AMA_Common_DataHandler::instance();
if (!MULTIPROVIDER && !is_null($dsn)) {
// must check if passed $dsn has the module login tables
// execute this dummy query, if result is not an error table is there
$sql = 'SELECT NULL FROM `' . self::$PREFIX . 'providers`';
// must use AMA_DataHandler because we are not able to
// query AMALoginDataHandelr in this method!
$ok = AMA_DataHandler::instance($dsn)->getOnePrepared($sql);
if (!AMA_DB::isError($ok)) {
self::$dbToUse = $theInstance;
}
}
}
return $theInstance;
}
