PHP Decode

<?php
/**
 * Copyright  Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
declare(strict_types=1);

namespace Magento\CatalogGraphQl\Model\Resolver\Products\DataProvider\Product\CollectionProcessor;

use Magento\Catalog\Model\ResourceModel\Product\Collection;
use Magento\CatalogGraphQl\Model\Resolver\Products\DataProvider\Product\CollectionProcessorInterface;
use Magento\Framework\Api\SearchCriteriaInterface;
use Magento\CatalogInventory\Api\StockConfigurationInterface;
use Magento\CatalogInventory\Model\ResourceModel\Stock\Status as StockStatusResource;
use Magento\GraphQl\Model\Query\ContextInterface;

/**
 * Add stock filtering if configuration requires it.
 *
 * {@inheritdoc}
 */
class StockProcessor implements CollectionProcessorInterface
{
    /**
     * @var StockConfigurationInterface
     */
    private $stockConfig;

    /**
     * @var StockStatusResource
     */
    private $stockStatusResource;

    /**
     * @param StockConfigurationInterface $stockConfig
     * @param StockStatusResource $stockStatusResource
     */
    public function __construct(StockConfigurationInterface $stockConfig, StockStatusResource $stockStatusResource)
    {
        $this->stockConfig = $stockConfig;
        $this->stockStatusResource = $stockStatusResource;
    }

    /**
     * Process collection to add additional joins, attributes, and clauses to a product collection.
     *
     * @param Collection $collection
     * @param SearchCriteriaInterface $searchCriteria
     * @param array $attributeNames
     * @param ContextInterface|null $context
     * @return Collection
     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
     */
    public function process(
        Collection $collection,
        SearchCriteriaInterface $searchCriteria,
        array $attributeNames,
        ContextInterface $context = null
    ): Collection {
        $stockFlag = 'has_stock_status_filter';
        if (!$collection->hasFlag($stockFlag)) {
            $this->stockStatusResource->addStockDataToCollection($collection, !$this->stockConfig->isShowOutOfStock());
            $collection->setFlag($stockFlag, true);
        }

        return $collection;
    }
}
 ?>