CIBlockCMLImport::ImportElements

public function ImportElements($start_time, $interval)
{
	global $DB;
	$counter = array(
		"ADD" => 0,
		"UPD" => 0,
		"DEL" => 0,
		"DEA" => 0,
		"ERR" => 0,
		"CRC" => 0,
	);
	if($this->next_step["XML_ELEMENTS_PARENT"])
	{
		IblockPropertyIndexManager::enableDeferredIndexing();
		if ($this->bCatalog)
			CatalogProductSku::enableDeferredCalculation();
		$this->activeStores = $this->getActiveStores();

		$obElement = new CIBlockElement();
		$obElement->CancelWFSetMove();
		$bWF = Loader::includeModule("workflow");
		$filter = [
			'PARENT_ID' => $this->next_step['XML_ELEMENTS_PARENT'],
		];
		if (isset($this->next_step['XML_LAST_ID']))
		{
			$filter['>ID'] = $this->next_step['XML_LAST_ID'];
		}
		$rsParents = $this->_xml_file->GetList(
			array("ID" => "asc"),
			$filter,
			array("ID", "LEFT_MARGIN", "RIGHT_MARGIN")
		);
		while($arParent = $rsParents->Fetch())
		{
			if (!$arParent["RIGHT_MARGIN"])
				continue;

			$counter["CRC"]++;

			$arXMLElement = $this->_xml_file->GetAllChildrenArray($arParent);
			$hashPosition = strrpos($arXMLElement[$this->mess["IBLOCK_XML2_ID"]], "#");

			if(!$this->next_step["bOffer"] && $this->use_offers)
			{
				if($hashPosition !== false)
				{
					$this->next_step["XML_LAST_ID"] = $arParent["ID"];
					continue;
				}
			}
			if(array_key_exists($this->mess["IBLOCK_XML2_STATUS"], $arXMLElement) && ($arXMLElement[$this->mess["IBLOCK_XML2_STATUS"]] == $this->mess["IBLOCK_XML2_DELETED"]))
			{
				$ID = $this->GetElementByXML_ID($this->next_step["IBLOCK_ID"], $arXMLElement[$this->mess["IBLOCK_XML2_ID"]]);
				if($ID && $obElement->Update($ID, array("ACTIVE"=>"N"), $bWF))
				{
					if($this->use_offers)
						$this->ChangeOffersStatus($ID, "N", $bWF);
					$counter["DEA"]++;
				}
				else
				{
					$counter["ERR"]++;
				}
			}
			elseif(array_key_exists($this->mess["IBLOCK_XML2_BX_TAGS"], $arXMLElement))
			{
				//This is our export file
				$ID = $this->ImportElement($arXMLElement, $counter, $bWF, $arParent);
			}
			else
			{
				$this->arFileDescriptionsMap = array();
				$this->arElementFilesId = array();
				$this->arElementFiles = array();
				//offers.xml
				if ($this->next_step["bOffer"])
				{
					if (!$this->use_offers)
					{
						//We have only one information block
						$ID = $this->ImportElementPrices($arXMLElement, $counter, $arParent);
					}
					elseif ($hashPosition === false && !$this->force_offers)
					{
						//We have separate offers iblock and there is element price
						$ID = $this->ImportElementPrices($arXMLElement, $counter, $arParent);
					}
					else
					{
						$xmlKeys = array_keys($arXMLElement);
						if ($xmlKeys == array($this->mess["IBLOCK_XML2_ID"], $this->mess["IBLOCK_XML2_PRICES"]))
						{
							//prices.xml
							$ID = $this->ImportElementPrices($arXMLElement, $counter, $arParent);
						}
						elseif ($xmlKeys == array($this->mess["IBLOCK_XML2_ID"], $this->mess["IBLOCK_XML2_RESTS"]))
						{
							//rests.xml
							$ID = $this->ImportElementPrices($arXMLElement, $counter, $arParent);
						}
						else
						{
							//It's an offer in offers iblock
							$ID = $this->ImportElement($arXMLElement, $counter, $bWF, $arParent);
						}
					}
				}
				//import.xml
				else
				{
					$ID = $this->ImportElement($arXMLElement, $counter, $bWF, $arParent);
				}
			}

			if($ID)
			{
				$ipropValues = new BitrixIblockInheritedPropertyElementValues($this->next_step["IBLOCK_ID"], $ID);
				$ipropValues->clearValues();

				$DB->Query("UPDATE b_iblock_element SET TIMESTAMP_X = ".$DB->CurrentTimeFunction()." WHERE ID=".$ID);
				$this->_xml_file->Add(array("PARENT_ID" => 0, "LEFT_MARGIN" => $ID));
			}

			$this->next_step["XML_LAST_ID"] = $arParent["ID"];

			if($interval > 0 && (time()-$start_time) > (2*$interval/3))
				break;
		}
		if ($this->bCatalog)
		{
			CatalogProductSku::disableDeferredCalculation();
			CatalogProductSku::calculate();
		}
		IblockPropertyIndexManager::disableDeferredIndexing();
		IblockPropertyIndexManager::runDeferredIndexing($this->next_step["IBLOCK_ID"]);
	}
	$this->CleanTempFiles();
	return $counter;
}