CWebDavIblock::SetRootSection

function SetRootSection($id, $force=false, $enableRedirect = true)
{

	$id = intval($id);
	$this->CACHE_PATH = $this->cachePathBase;
	$this->arRootSection = false;

	if ($id <= 0)
	{
		return true;
	}

	if($force && isset(self::$arSectionCache[$id]))
	{
		unset(self::$arSectionCache[$id]);
	}

	if(isset(self::$arSectionCache[$id]))
	{
		$this->arRootSection = self::$arSectionCache[$id];
	}
	elseif(!$force)
	{
		$res = $this->GetCache($id, "root_section", true);
		if($res["result"])
		{
			$this->arRootSection = $res["data"];
		}
	}

	if($this->arRootSection === false)
	{

		$arFilter = array(
			"IBLOCK_ID" => $this->IBLOCK_ID,
			"ID" => $id,
			"CHECK_PERMISSIONS" => "N"
		);
		$db_res = CIBlockSection::GetList(array(), $arFilter, false, array_merge(array('UF_USE_EXT_SERVICES'), self::getUFNamesForSectionLink()));

		if ($db_res && $res = $db_res->Fetch())
		{
			//fixes
			if (CModule::IncludeModule('socialnetwork'))
			{
				// fix an old bug, folder don't contain group name
				if ($res['NAME'] == GetMessage("SONET_GROUP_PREFIX"))
				{
					$arGroup = CSocNetGroup::GetByID(intval($res['SOCNET_GROUP_ID']));
					if($arGroup !== false)
					{
						$res['NAME'] = GetMessage("SONET_GROUP_PREFIX").$arGroup['NAME'];
						$ibs = new CIBlockSection();
						$ibs->Update($res['ID'], array('NAME' => $res['NAME']));
					}
				}
			}

			// fix incorrect iblock settings for socnet
			if (!$this->_symlinkMode &&
				IsModuleInstalled("bizproc") &&
				(CIBlock::GetArrayByID($this->IBLOCK_ID, "BIZPROC") == "N")
			)
			{
				$ib = new CIBlock;
				$res = $ib->Update($this->IBLOCK_ID, array(
					'BIZPROC' => 'Y',
					'WORKFLOW' => 'N'
				));
				if($enableRedirect)
				{
					LocalRedirect($GLOBALS['APPLICATION']->GetCurPageParam());
				}
			}
			//fixes end

			$this->arRootSection = $res;
			self::$arSectionCache[$id] = $res;
			$arTags = array("iblock_id_" . $this->IBLOCK_ID);
			$this->SetCache($id, "root_section", self::$arSectionCache[$id], $arTags, true);
		}
		else
		{
			return false;
		}

	}
	$this->CACHE_PATH = $this->cachePathBase . intval($id).'/';
	return true;
}