CLDAP::GetDepartmentIdForADUser

public function GetDepartmentIdForADUser($department, $managerDN, $username, &$cache=FALSE, $iblockId = FALSE, $names = FALSE)
{
	global $USER_FIELD_MANAGER;

	// check for loops in manager structure, if loop is found - quit
	// should be done before cache lookup
	if ($names && isset($names[$username]))
		return false;

	// if department id for this user is already stored in cache
	if ($cache)
	{
		$departmentCached = $cache[$username];
		// if user was not set as head earlier, then do not get his id from cache
		if ($departmentCached)
			return $departmentCached;
	}

	// if it is a first call in recursive chain
	if (!$iblockId)
	{
		// check module inclusions
		if (!IsModuleInstalled('intranet') || !CModule::IncludeModule('iblock'))
			return false;

		// get structure's iblock id
		$iblockId=COption::GetOptionInt("intranet", "iblock_structure",  false, false);
		if (!$iblockId)
			return false;

		$names = array();
	}

	// save current username as already visited
	$names[$username] = true;

	$arManagerDep = null;
	$mgrDepartment = null;

	// if there's a manager - query it
	if ($managerDN)
	{
		preg_match('/^((CN|uid)=.*?)(,){1}([^,])*(=){1}/i', $managerDN, $matches); //Extract "CN=User Name" from full name
		$user = isset($matches[1]) ? str_replace('\', '',$matches[1]) : "";
		$userArr = $this->GetUserArray($user);

		if (is_array($userArr) && count($userArr) > 0)
		{
			foreach($userArr as $possibleManager)
			{
				if(!isset($possibleManager['dn']) || $managerDN != $possibleManager['dn'])
				{
					continue;
				}

				// contents of userArr are already in local encoding, no need for conversion here
				$mgrDepartment = $possibleManager[$this->arFields['USER_DEPARTMENT_ATTR']];
				if ($mgrDepartment && trim($mgrDepartment)!='')
				{
					// if manager's department name is set - then get it's id
					$mgrManagerDN = $possibleManager[$this->arFields['USER_MANAGER_ATTR']];
					$mgrUserName = $possibleManager[$this->arFields['USER_ID_ATTR']];
					$arManagerDep = $this->GetDepartmentIdForADUser($mgrDepartment, $mgrManagerDN, $mgrUserName, $cache, $iblockId, $names);
					// fill in cache
					if ($cache && $arManagerDep)
						$cache[$mgrUserName] = $arManagerDep;
				}
			}
		}
	}

	// prepare result and create department (if needed)
	$arResult = array(
		'IS_HEAD' => ($this->arFields['SET_DEPARTMENT_HEAD'] == 'Y')
	);

	if ($arManagerDep)
	{
		// if got manager's data correctly
		if ($department && trim($department)!='' && ($mgrDepartment!=$department))
		{
			// if our department is set && differs from manager's, set manager's as parent
			$parentSectionId = $arManagerDep['ID'];
		}
		else
		{
			// - if user has no department, but somehow have manager - then he is assumed to be in manager's department
			// - if user has same department name as manager - then he is not head
			// here we can return manager's department id immediately
			$arResult = $arManagerDep;
			$arResult['IS_HEAD'] = false;
			return $arResult;
		}
	}
	else
	{
		// if there's no manager's data
		if ($department && trim($department)!='')
		{
			$parentSectionId = $this->arFields['ROOT_DEPARTMENT'];
		}
		else
		{
			// if have no manager's department and no own department:
			// - use default as our department and root as parent section if default is set
			// - or just root if default has empty value
			// - or return false, if setting of default department is turned off
			if ($this->arFields['STRUCT_HAVE_DEFAULT'] && $this->arFields['STRUCT_HAVE_DEFAULT'] == "Y")
			{
				// if can use default department
				$department = $this->arFields['DEFAULT_DEPARTMENT_NAME'];
				if ($department && trim($department)!='')
				{
					// if department is not empty
					$parentSectionId = $this->arFields['ROOT_DEPARTMENT'];
				}
				else
				{
					// if it is empty - return parent
					return array('ID' => $this->arFields['ROOT_DEPARTMENT']);
				}
			}
			else
			{
				// if have no department in AD and no default - then do not set a department
				return false;
			}
		}
	}
	// 3. if there's no department set for this user, this means there was no default department name (which substituted in *) - then there's no need to set department id for this user at all
	if (!$department || trim($department)=='')
		return false;

	// 4. detect this user's department ID, using parent id and department name string, which we certainly have now (these 2 parameters are required to get an ID)

	// see if this department already exists
	$bs = new CIBlockSection();
	$dbExistingSections = GetIBlockSectionList(
		$iblockId,
		($parentSectionId >= 0 ? $parentSectionId : false),
		$arOrder = Array("left_margin" => "asc"),
		$cnt = 0,
		$arFilter = Array('NAME' => $department)
	);

	$departmentId = false;
	if($arItem = $dbExistingSections->GetNext())
		$departmentId = $arItem['ID'];
	if (!$departmentId)
	{
		//create new department
		$arNewSectFields = Array(
			"ACTIVE" => "Y",
			"IBLOCK_ID" => $iblockId,
			"NAME" => $department
		);
		if ($parentSectionId>=0)
			$arNewSectFields["IBLOCK_SECTION_ID"] = $parentSectionId;
		// and get it's Id
		$departmentId = $bs->Add($arNewSectFields);
	}

	$arElement = $USER_FIELD_MANAGER->GetUserFields(
		'IBLOCK_'.$iblockId.'_SECTION',
		$departmentId
	);

	// if the head of the department is already set, do not change it
	if (!empty($arElement['UF_HEAD']['VALUE']))
		$arResult['IS_HEAD'] = false;

	$arResult['ID'] = $departmentId;
	return $arResult;
}