balancer.php

<?php
namespace Bitrix\Catalog\Product\Store\BatchBalancer;
 
use Bitrix\Catalog\Product\Store\CostPriceCalculator;
use Bitrix\Main\Result;
use Bitrix\Main\Type\DateTime;
 
final class Balancer
{
    private int $productId;
 
    private ?DateTime $start = null;
 
    public function __construct(int $productId)
    {
        $this->productId = $productId;
    }
 
    public function getProductId(): int
    {
        return $this->productId;
    }
 
    public function setStartDate(DateTime $start): self
    {
        $this->start = $start;
 
        return $this;
    }
 
    public function getStartDate(): ?DateTime
    {
        return $this->start;
    }
 
    public function fill(): Result
    {
        if (CostPriceCalculator::getMethod() === CostPriceCalculator::METHOD_FIFO)
        {
            $method = new Method\Fifo($this);
        }
        else
        {
            $method = new Method\Average($this);
        }
 
        return $method->fill();
    }
}