CTasks::GetAllowedGroups

static function GetAllowedGroups($arParams = [])
{
	global $DB;
	static $ALLOWED_GROUPS = [];

	$userId = null;

	if (is_array($arParams) && isset($arParams['USER_ID']))
	{
		$userId = $arParams['USER_ID'];
	}
	else
	{
		$userId = User::getId();
	}

	if (!($userId >= 1))
	{
		$userId = 0;
	}

	if (!isset($ALLOWED_GROUPS[$userId]) && CModule::IncludeModule("socialnetwork"))
	{
		// bottleneck
		$strSql = "SELECT DISTINCT(T.GROUP_ID) FROM b_tasks T WHERE T.GROUP_ID IS NOT NULL";

		$rsGroups = $DB->Query($strSql, false, "File: " . __FILE__ . "
Line: " . __LINE__);
		$ALLOWED_GROUPS[$userId] = $arGroupsWithTasks = [];
		while ($arGroup = $rsGroups->Fetch())
		{
			$arGroupsWithTasks[] = $arGroup["GROUP_ID"];
		}
		if (is_array($arGroupsWithTasks) && sizeof($arGroupsWithTasks))
		{
			if ($userId === 0)
			{
				$featurePerms = CSocNetFeaturesPerms::CurrentUserCanPerformOperation(
					SONET_ENTITY_GROUP,
					$arGroupsWithTasks,
					"tasks",
					"view_all"
				);
			}
			else
			{
				$featurePerms = CSocNetFeaturesPerms::CanPerformOperation(
					$userId,
					SONET_ENTITY_GROUP,
					$arGroupsWithTasks,
					"tasks",
					"view_all"
				);
			}

			if (is_array($featurePerms))
			{
				$ALLOWED_GROUPS[$userId] = array_keys(array_filter($featurePerms));
			}
		}
	}

	return $ALLOWED_GROUPS[$userId];
}