CWebDavIblock::_delete_section

function _delete_section($sectionID)
{
	static $onDeleteEventSet = false;

	$result = true;

	if ($onDeleteEventSet == false && ($this->workflow == 'bizproc' || $this->workflow == 'bizproc_limited'))
	{
		AddEventHandler("iblock", "OnBeforeIBlockElementDelete", Array($this, "_onDeleteElement"));
		AddEventHandler("iblock", "OnBeforeIBlockSectionDelete", Array($this, "_onDeleteSection"));
	}

	$arSections = array();
	$sectionID = intval($sectionID);

	$s = CIBlockSection::GetList(array(),
		array(
			"ID" => $sectionID,
			'CHECK_PERMISSIONS' => 'N'
		),
		false,
		array('ID', 'NAME', 'LEFT_MARGIN', 'RIGHT_MARGIN', 'DEPTH_LEVEL', 'IBLOCK_ID')
	);
	if ($arParentSection = $s->Fetch())
	{
		CWebDavSymlinkHelper::setSectionOriginalName($sectionID, $arParentSection['NAME']);
		if (! $this->GetPermission('SECTION', $sectionID, 'section_delete', false)) // check perms on target folder
		{
			$result = GetMessage('WD_ERR_DELETE_FOLDER_NO_PERMS', array(
				'ID' => $sectionID, //$arSection['ID'],
				'NAME' => "", //htmlspecialcharsbx($arSection['NAME'])
			));
		}
		else
		{
			$arSections[] = $sectionID;

			$rSection = CIBlockSection::GetList( // get all subsections
				array('LEFT_MARGIN' => 'DESC'),
				array(
					'CHECK_PERMISSIONS' => 'N',
					'IBLOCK_ID' => $arParentSection['IBLOCK_ID'],
					'>LEFT_MARGIN' => $arParentSection['LEFT_MARGIN'],
					' $arParentSection['RIGHT_MARGIN'],
					'>DEPTH_LEVEL' => $arParentSection['DEPTH_LEVEL']
				),
				false,
				array('ID', 'NAME')
			);

			if ($rSection)
			{
				while ($arSection = $rSection->Fetch())
				{
					if (! $this->GetPermission('SECTION', $arSection['ID'], 'section_delete')) // check perms on subsection
					{
						$result = GetMessage('WD_ERR_DELETE_FOLDER_NO_PERMS', array(
							'ID' => $arSection['ID'],
							'NAME' => htmlspecialcharsbx($arSection['NAME'])
						));
						break;
					}
					else
					{
						$arSections[] = $arSection['ID'];
					}
				}
			}
		}
		if ($result === true) // no errors
		{
			$se = new CIBlockSection();
			if (!$se->Delete($arParentSection['ID'], false)) // delete each section in separate transaction
			{
				$result = GetMessage('WD_FILE_ERROR16');
			}
		}

	}
	return (($result === true) ? $result : $this->ThrowError("423 Locked", "423", $result));
}