batchmanager.php

См. документацию.

<?php
namespace Bitrix\Catalog\Product\Store;
 
use Bitrix\Catalog\EO_StoreBatch;
use Bitrix\Catalog\EO_StoreBatch_Collection;
use Bitrix\Catalog\StoreBatchTable;
use Bitrix\Currency\CurrencyManager;
use Bitrix\Main\ArgumentException;
use Bitrix\Main\Loader;
use Bitrix\Main\ObjectPropertyException;
use Bitrix\Main\SystemException;

class BatchManager
{
    private int $productId;
 
    public function __construct(int $productId)
    {
        $this->productId = $productId;
    }

    public function getProductId(): int
    {
        return $this->productId;
    }

    public function getStoreCollection(array $filter = null): EO_StoreBatch_Collection
    {
        $filter['=ELEMENT_ID'] = $this->getProductId();
 
        return StoreBatchTable::getList([
                'filter' => $filter,
                'order' => ['ID' => 'ASC'],
            ])
            ->fetchCollection()
        ;
    }

    public function getAvailableStoreCollection(int $storeId): EO_StoreBatch_Collection
    {
        return $this->getStoreCollection([
            '>AVAILABLE_AMOUNT' => 0,
            '=STORE_ID' => $storeId,
        ]);
    }

    public function calculateCostPrice(float $quantity, int $storeId, string $currency = null): float
    {
        if (empty($currency) && Loader::includeModule('currency'))
        {
            $currency = CurrencyManager::getBaseCurrency();
        }
 
        return (new CostPriceCalculator($this))->calculate($quantity, $storeId, $currency);
    }
}