SkuCollection.php

<?php
 
namespace Bitrix\Catalog\v2\Sku;
 
use Bitrix\Catalog\v2\BaseCollection;
use Bitrix\Catalog\v2\BaseEntity;
use Bitrix\Catalog\v2\IoC\ContainerContract;
use Bitrix\Catalog\v2\IoC\Dependency;
 
class SkuCollection extends BaseCollection
{
    protected $container;
    protected $factory;
 
    public function __construct(ContainerContract $container, SkuFactory $factory)
    {
        $this->container = $container;
        $this->factory = $factory;
    }
 
    public function create(): BaseSku
    {
        $parent = $this->getParent();
 
        if ($parent && $parent->isSimple())
        {
            $converter = $this->container->get(Dependency::PRODUCT_CONVERTER);
            $converter->convert($parent, $converter::SKU_PRODUCT);
        }
 
        $sku = $this->createEntity();
        $this->add($sku);
 
        if (!$sku->hasName() && $parent->hasName())
        {
            $sku->setName($parent->getName());
        }
 
        return $sku;
    }
 
    protected function createEntity(): BaseSku
    {
        $parent = $this->getParent();
 
        if ($parent && $parent->isSimple())
        {
            $type = SkuFactory::SIMPLE_SKU;
        }
        else
        {
            $type = SkuFactory::SKU;
        }
 
        return $this->factory->createEntity($type);
    }
 
    protected function getAlreadyLoadedFilter(): array
    {
        $filter = parent::getAlreadyLoadedFilter();
 
        foreach ($this->items as $item)
        {
            if (!$item->isNew())
            {
                $filter['!ID'][] = $item->getId();
            }
        }
 
        return $filter;
    }
 
    public function getFirst(callable $callback = null): ?BaseEntity
    {
        return parent::getFirst($callback);
    }
}