function sendRequest($userId, $usernames, $messageInfo, $shieldType = 'notice_website', $typeName = null)
{
$usernames = M::_getUnShieldUsers($usernames, $shieldType);
if (!$usernames) {
return false;
}
$messageServer = L::loadClass("message", 'message');
$typeName = $typeName ? $typeName : 'request_friend';
$typeId = $messageServer->getConst($typeName);
return $messageServer->sendRequest($userId, $usernames, $messageInfo, $typeId);
}