Sku::calculateOfferChange

static function calculateOfferChange(int $elementId, int $iblockId): void
{
	if (!isset(self::$offers[$elementId]))
		return;

	$iblockData = CCatalogSku::GetInfoByOfferIBlock($iblockId);
	if (!empty($iblockData))
	{
		$offerDescr = self::$offers[$elementId];
		$existCurrentProduct = ($offerDescr['CURRENT_PRODUCT'] > 0);
		$existNewProduct = ($offerDescr['NEW_PRODUCT'] > 0);
		if ($existCurrentProduct)
		{
			self::calculateComplete(
				$offerDescr['CURRENT_PRODUCT'],
				$iblockData['PRODUCT_IBLOCK_ID'],
				CatalogProductTable::TYPE_SKU
			);
		}
		if ($existNewProduct)
		{
			self::calculateComplete(
				$offerDescr['NEW_PRODUCT'],
				$iblockData['PRODUCT_IBLOCK_ID'],
				CatalogProductTable::TYPE_SKU
			);
		}
		if (!$existCurrentProduct || !$existNewProduct)
		{
			self::disableUpdateAvailable();
			$type = (
				$existNewProduct
				? CatalogProductTable::TYPE_OFFER
				: CatalogProductTable::TYPE_FREE_OFFER
			);
			$result = CatalogModelProduct::update($elementId, array('TYPE' => $type));
			unset($result);
			self::enableUpdateAvailable();
		}
		unset($existNewProduct, $existCurrentProduct);
		unset($offerDescr);
	}
	unset(self::$offers[$elementId]);
}