CAllVoteChannel::GetGroupPermission

static function GetGroupPermission($channel_id, $arGroups=false, $params = array())
{
	global $DB, $USER, $CACHE_MANAGER, $APPLICATION;
	$err_mess = (CAllVoteChannel::err_mess())."
Function: GetGroupPermission
Line: ";
	$channel_id = trim($channel_id);
	$arGroups = ($arGroups === false ? $USER->GetUserGroupArray() : $arGroups);
	$arGroups = ((!is_array($arGroups) || empty($arGroups)) ? array(2) : $arGroups);
	$groups = implode(",", $arGroups);
	$params = is_array($params) ? $params : array("get_from_database" => $params);

	$cache = array(
		"channel_id" => $channel_id,
		"groups" => $arGroups,
		"get_from_database" => $params["get_from_database"] ?? null);
	$cache_id = "b_vote_perm_".md5(serialize($cache));
	$permission = 0;

	if (VOTE_CACHE_TIME !== false && $CACHE_MANAGER->Read(VOTE_CACHE_TIME, $cache_id, "b_vote_perm"))
	{
		$permission = intval($CACHE_MANAGER->Get($cache_id));
	}
	else
	{
		if ($params["get_from_database"] ?? null != "Y")
			$permission = ((in_array(1, $USER->GetUserGroupArray()) || $APPLICATION->GetGroupRight("vote") >= "W") ? 4 : $permission);

		if ($permission <= 0 && !empty($groups))
		{
			$strSql =
				"SELECT BVC2G.CHANNEL_ID, BVC.SYMBOLIC_NAME CHANNEL_SID, MAX(BVC2G.PERMISSION) as PERMISSION
			FROM b_vote_channel_2_group BVC2G
			INNER JOIN b_vote_channel BVC ON (BVC2G.CHANNEL_ID = BVC.ID)
			WHERE ".($params["CHANNEL_SID"] != "Y" ? "BVC2G.CHANNEL_ID" : "BVC.SYMBOLIC_NAME").
					"='".$DB->ForSql($channel_id)."' and GROUP_ID in ($groups)
			GROUP BY BVC2G.CHANNEL_ID, BVC.SYMBOLIC_NAME";
			$db_res = $DB->Query($strSql, false, $err_mess.__LINE__);
			if ($db_res && ($res = $db_res->Fetch()))
			{
				$permission = intval($res["PERMISSION"]);
				if (VOTE_CACHE_TIME !== false)
				{
					$cache["channel_id"] = $res["CHANNEL_SID"];
					$cache_id = "b_vote_perm_".md5(serialize($cache));
					$CACHE_MANAGER->Set($cache_id, $permission);
					$cache["channel_id"] = trim($res["CHANNEL_ID"]);
				}
			}
		}
		if (VOTE_CACHE_TIME !== false)
		{
			$cache_id = "b_vote_perm_".md5(serialize($cache));
			$CACHE_MANAGER->Set($cache_id, $permission);
		}
	}
	return $permission;
}