Sku::getOfferState

static function getOfferState($productId, $iblockId = 0)
{
	$result = self::OFFERS_ERROR;
	$productId = (int)$productId;
	if ($productId <= 0)
		return $result;
	$iblockId = (int)$iblockId;
	if ($iblockId <= 0)
		$iblockId = (int)CIBlockElement::GetIBlockByID($productId);
	if ($iblockId <= 0)
		return $result;

	$result = self::OFFERS_NOT_EXIST;
	$offerList = CCatalogSku::getOffersList($productId, $iblockId, array(), array('ID', 'ACTIVE'));
	if (!empty($offerList[$productId]))
	{
		$result = self::OFFERS_NOT_AVAILABLE;
		$activeOffers = array_filter($offerList[$productId], 'BitrixCatalogProductSku::filterActive');
		if (!empty($activeOffers))
		{
			$existOffers = CatalogProductTable::getList(array(
				'select' => array('ID', 'AVAILABLE'),
				'filter' => array('@ID' => array_keys($activeOffers), '=AVAILABLE' => CatalogProductTable::STATUS_YES),
				'limit' => 1
			))->fetch();
			if (!empty($existOffers))
				$result = self::OFFERS_AVAILABLE;
			unset($existOffers);
		}
		unset($activeOffers);
	}
	unset($offerList);

	return $result;
}