DepartmentRepository::getAllUserDepartmentIds

public function getAllUserDepartmentIds($userId)
{
	$userDepartmentsIds = $this->getDirectParentIdsByUserId($userId);
	foreach ($userDepartmentsIds as $userDep)
	{
		$userDepartmentsIds = array_merge($this->getAllParentDepartmentsIds($userDep), $userDepartmentsIds);
	}
	return array_unique($userDepartmentsIds);
}