Base::calculateItemPrices

protected function calculateItemPrices(array &$items)
{
	if (empty($items))
		return;

	$enableCompatible = $this->isEnableCompatible();

	if ($enableCompatible)
		$this->initCompatibleFields($items);

	foreach (array_keys($items) as $index)
	{
		$id = $items[$index]['ID'];
		if (!isset($this->calculatePrices[$id]))
			continue;
		if (empty($this->prices[$id]))
			continue;
		$productPrices = $this->prices[$id];
		$result = array(
			'ITEM_PRICE_MODE' => null,
			'ITEM_PRICES' => array(),
			'ITEM_PRICES_CAN_BUY' => false
		);
		if ($this->arParams['FILL_ITEM_ALL_PRICES'])
			$result['ITEM_ALL_PRICES'] = array();
		$priceBlockIndex = 0;
		if (!empty($productPrices['QUANTITY']))
		{
			$result['ITEM_PRICE_MODE'] = CatalogProductTable::PRICE_MODE_QUANTITY;
			$ratio = current($this->ratios[$id]);
			foreach ($this->quantityRanges[$id] as $range)
			{
				$priceBlock = $this->calculatePriceBlock(
					$items[$index],
					$productPrices['QUANTITY'][$range['HASH']],
					$ratio['RATIO'],
					$this->arParams['USE_PRICE_COUNT'] || $this->checkQuantityRange($range)
				);
				if (!empty($priceBlock))
				{
					$minimalPrice = ($this->arParams['FILL_ITEM_ALL_PRICES']
						? $priceBlock['MINIMAL_PRICE']
						: $priceBlock
					);
					if ($minimalPrice['QUANTITY_FROM'] === null)
					{
						$minimalPrice['MIN_QUANTITY'] = $ratio['RATIO'];
					}
					else
					{
						$minimalPrice['MIN_QUANTITY'] = $ratio['RATIO'] * ((int)($minimalPrice['QUANTITY_FROM']/$ratio['RATIO']));
						if ($minimalPrice['MIN_QUANTITY'] < $minimalPrice['QUANTITY_FROM'])
							$minimalPrice['MIN_QUANTITY'] += $ratio['RATIO'];
					}
					$result['ITEM_PRICES'][$priceBlockIndex] = $minimalPrice;
					if (isset($this->storage['PRICES_CAN_BUY'][$minimalPrice['PRICE_TYPE_ID']]))
						$result['ITEM_PRICES_CAN_BUY'] = true;
					if ($this->arParams['FILL_ITEM_ALL_PRICES'])
					{
						$priceBlock['ALL_PRICES']['MIN_QUANTITY'] = $minimalPrice['MIN_QUANTITY'];
						$result['ITEM_ALL_PRICES'][$priceBlockIndex] = $priceBlock['ALL_PRICES'];
					}
					unset($minimalPrice);
					$priceBlockIndex++;
				}
				unset($priceBlock);
			}
			unset($range);
			unset($ratio);
		}
		if (!empty($productPrices['SIMPLE']))
		{
			$result['ITEM_PRICE_MODE'] = CatalogProductTable::PRICE_MODE_SIMPLE;
			$ratio = current($this->ratios[$id]);
			$priceBlock = $this->calculatePriceBlock(
				$items[$index],
				$productPrices['SIMPLE'],
				$ratio['RATIO'],
				true
			);
			if (!empty($priceBlock))
			{
				$minimalPrice = ($this->arParams['FILL_ITEM_ALL_PRICES']
					? $priceBlock['MINIMAL_PRICE']
					: $priceBlock
				);
				$minimalPrice['MIN_QUANTITY'] = $ratio['RATIO'];
				$result['ITEM_PRICES'][$priceBlockIndex] = $minimalPrice;
				if (isset($this->storage['PRICES_CAN_BUY'][$minimalPrice['PRICE_TYPE_ID']]))
					$result['ITEM_PRICES_CAN_BUY'] = true;
				if ($this->arParams['FILL_ITEM_ALL_PRICES'])
				{
					$priceBlock['ALL_PRICES']['MIN_QUANTITY'] = $minimalPrice['MIN_QUANTITY'];
					$result['ITEM_ALL_PRICES'][$priceBlockIndex] = $priceBlock['ALL_PRICES'];
				}
				unset($minimalPrice);
				$priceBlockIndex++;
			}
			unset($priceBlock);
			unset($ratio);
		}
		$this->prices[$id] = $result;

		if (isset($items[$index]['ACTIVE']) && $items[$index]['ACTIVE'] === 'N')
		{
			$items[$index]['CAN_BUY'] = false;
		}
		else
		{
			$items[$index]['CAN_BUY'] = $result['ITEM_PRICES_CAN_BUY'] && $items[$index]['PRODUCT']['AVAILABLE'] === 'Y';
		}

		unset($priceBlockIndex, $result);
		unset($productPrices);

		if ($enableCompatible)
			$this->resortOldPrices($id);
	}
	unset($index);
}