ApiPlatform\Core\Graphql\Resolver\ItemResolver

Complexity

Total Complexity

5

Size/Duplication

Total Lines	38
Duplicated Lines	0 %

Coupling/Cohesion

Components	0
Dependencies	5

Importance

Changes

0

2 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	6	1
B	__invoke()	0	22	4

<?php

/*
 * This file is part of the API Platform project.
 *
 * (c) Kévin Dunglas <dunglas@gmail.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

declare(strict_types=1);

namespace ApiPlatform\Core\Graphql\Resolver;

use ApiPlatform\Core\Api\IriConverterInterface;
use ApiPlatform\Core\Exception\ItemNotFoundException;
use ApiPlatform\Core\Graphql\Serializer\ItemNormalizer;
use ApiPlatform\Core\Metadata\Resource\Factory\ResourceMetadataFactoryInterface;
use ApiPlatform\Core\Util\ClassInfoTrait;
use GraphQL\Type\Definition\ResolveInfo;
use Symfony\Component\Serializer\Normalizer\NormalizerInterface;

/**
 * Creates a function retrieving an item to resolve a GraphQL query.
 *
 * @experimental
 *
 * @author Alan Poulain <contact@alanpoulain.eu>
 * @author Kévin Dunglas <dunglas@gmail.com>
 */
final class ItemResolver
{
    use ClassInfoTrait;

    private $iriConverter;
    private $normalizer;
    private $resourceMetadataFactory;

    public function __construct(IriConverterInterface $iriConverter, NormalizerInterface $normalizer, ResourceMetadataFactoryInterface $resourceMetadataFactory)
    {
        $this->iriConverter = $iriConverter;
        $this->normalizer = $normalizer;
        $this->resourceMetadataFactory = $resourceMetadataFactory;
    }

    public function __invoke($source, $args, $context, ResolveInfo $info)
    {
        // Data already fetched and normalized (field or nested resource)
        if (isset($source[$info->fieldName])) {
            return $source[$info->fieldName];
        }

        if (!isset($args['id'])) {
            return null;
        }

        // TODO: initialize the EagerLoading extension
        try {
            $item = $this->iriConverter->getItemFromIri($args['id']);
        } catch (ItemNotFoundException $e) {
            return null;
        }

        $normalizationContext = $this->resourceMetadataFactory->create($this->getObjectClass($item))->getGraphqlAttribute('query', 'normalization_context', [], true);

        return $this->normalizer->normalize($item, ItemNormalizer::FORMAT, $normalizationContext + ['attributes' => $info->getFieldSelection(PHP_INT_MAX)]);
    }
}