BasketBuilder::obtainCatalogProductsData

protected function obtainCatalogProductsData(array $fields = array())
{
	if(empty($this->catalogProductsIds))
		return;

	$order = $this->getOrder();
	//$this->catalogProductsIds = array();

	foreach($this->catalogProductsIds as  $id)
	{
		$details = OrderEdit::getProductDetails($id, $order->getUserId(), $order->getSiteId());

		if($details !== false)
			$this->catalogProductsData[$id] = $details;
	}

	$noCachedProductIds = array_diff($this->catalogProductsIds, array_keys($this->catalogProductsData));

	if(!empty($noCachedProductIds))
	{
		$noCachedData = BitrixSaleHelpersAdminProduct::getData($noCachedProductIds, $order->getSiteId(), array_keys($fields));

		foreach($noCachedData as $productId => $productData)
		{
			$this->catalogProductsData[$productId] = $productData;
			OrderEdit::setProductDetails($productId, $order->getUserId(), $order->getSiteId(), $this->catalogProductsData[$productId]);
		}

		$emptyData = array_diff($this->catalogProductsIds, array_keys($this->catalogProductsData));

		foreach($emptyData as $productId)
			$this->catalogProductsData[$productId] = array();
	}
}