ProjectProcessor::getUserGroups

private function getUserGroups(int $userId): array
{
	if (array_key_exists($userId, $this->userGroups))
	{
		return $this->userGroups[$userId];
	}

	$query = WorkgroupTable::query();
	$query->setSelect(['ID']);
	$query->registerRuntimeField(
		new Reference(
			'MY_PROJECT',
			UserToGroupTable::class,
			Join::on('this.ID', 'ref.GROUP_ID')
				->where('ref.USER_ID', $userId)
				->where(
					'ref.ROLE',
					'<=',
					UserToGroupTable::ROLE_USER
				),
			["join_type" => "INNER"]
		)
	);
	$projects = $query->exec()->fetchCollection();
	$res = ProjectProvider::filterByFeatures($projects, ['tasks' => 'view_all'], $userId, $this->getSiteId());

	$groupIds = [];
	foreach ($res as $row)
	{
		$groupIds[] = (int)$row['ID'];
	}

	$this->userGroups[$userId] = $groupIds;

	return $this->userGroups[$userId];
}