CXMPPUtility::GetUserByJId

static function GetUserByJId($jId)
{
	if ($jId == '')
		return false;

	$pos = mb_strpos($jId, "@");
	if ($pos !== false)
		$login = mb_substr($jId, 0, $pos);
	else
		$login = $jId;

	if ($login == '')
		return false;

	$dbUsers = CUser::GetList("ID", "desc", array("LOGIN_EQUAL_EXACT" => $login, "!UF_DEPARTMENT" => false));
	$arUser = $dbUsers->Fetch();
	if (!$arUser)
		return false;

	return $arUser;
}