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<?php |
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/* |
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* This file is part of the API Platform project. |
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* |
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* (c) Kévin Dunglas <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace ApiPlatform\Core\GraphQl\Resolver\Factory; |
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use ApiPlatform\Core\GraphQl\Resolver\QueryItemResolverInterface; |
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use ApiPlatform\Core\GraphQl\Resolver\Stage\DenyAccessStageInterface; |
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use ApiPlatform\Core\GraphQl\Resolver\Stage\ReadStageInterface; |
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use ApiPlatform\Core\GraphQl\Resolver\Stage\SerializeStageInterface; |
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use ApiPlatform\Core\Metadata\Resource\Factory\ResourceMetadataFactoryInterface; |
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use ApiPlatform\Core\Util\ClassInfoTrait; |
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use ApiPlatform\Core\Util\CloneTrait; |
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use GraphQL\Error\Error; |
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use GraphQL\Type\Definition\ResolveInfo; |
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use Psr\Container\ContainerInterface; |
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/** |
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* Creates a function retrieving an item to resolve a GraphQL query. |
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* |
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* @experimental |
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* |
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* @author Alan Poulain <[email protected]> |
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* @author Kévin Dunglas <[email protected]> |
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*/ |
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final class ItemResolverFactory implements ResolverFactoryInterface |
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{ |
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use CloneTrait; |
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use ClassInfoTrait; |
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private $readStage; |
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private $denyAccessStage; |
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private $serializeStage; |
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private $queryResolverLocator; |
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private $resourceMetadataFactory; |
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public function __construct(ReadStageInterface $readStage, DenyAccessStageInterface $denyAccessStage, SerializeStageInterface $serializeStage, ContainerInterface $queryResolverLocator, ResourceMetadataFactoryInterface $resourceMetadataFactory) |
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{ |
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$this->readStage = $readStage; |
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$this->denyAccessStage = $denyAccessStage; |
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$this->serializeStage = $serializeStage; |
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$this->queryResolverLocator = $queryResolverLocator; |
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$this->resourceMetadataFactory = $resourceMetadataFactory; |
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} |
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public function __invoke(?string $resourceClass = null, ?string $rootClass = null, ?string $operationName = null): callable |
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{ |
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return function (?array $source, array $args, $context, ResolveInfo $info) use ($resourceClass, $rootClass, $operationName) { |
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// Data already fetched and normalized (field or nested resource) |
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if (isset($source[$info->fieldName])) { |
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return $source[$info->fieldName]; |
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} |
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$operationName = $operationName ?? 'query'; |
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$resolverContext = ['source' => $source, 'args' => $args, 'info' => $info, 'is_collection' => false, 'is_mutation' => false]; |
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$item = ($this->readStage)($resourceClass, $rootClass, $operationName, $resolverContext); |
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if (null !== $item && !\is_object($item)) { |
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throw new \LogicException('Item from read stage should be a nullable object.'); |
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} |
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$resourceClass = $this->getResourceClass($item, $resourceClass, $info); |
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$resourceMetadata = $this->resourceMetadataFactory->create($resourceClass); |
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$queryResolverId = $resourceMetadata->getGraphqlAttribute($operationName, 'item_query'); |
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if (null !== $queryResolverId) { |
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/** @var QueryItemResolverInterface $queryResolver */ |
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$queryResolver = $this->queryResolverLocator->get($queryResolverId); |
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$item = $queryResolver($item, ['source' => $source, 'args' => $args, 'info' => $info]); |
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$resourceClass = $this->getResourceClass($item, $resourceClass, $info, sprintf('Custom query resolver "%s"', $queryResolverId).' has to return an item of class %s but returned an item of class %s.'); |
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} |
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($this->denyAccessStage)($resourceClass, $operationName, $resolverContext + [ |
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'extra_variables' => [ |
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'object' => $item, |
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'previous_object' => $this->clone($item), |
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], |
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]); |
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return ($this->serializeStage)($item, $resourceClass, $operationName, $resolverContext); |
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}; |
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} |
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/** |
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* @param object|null $item |
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* |
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* @throws Error |
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*/ |
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private function getResourceClass($item, ?string $resourceClass, ResolveInfo $info, string $errorMessage = 'Resolver only handles items of class %s but retrieved item is of class %s.'): string |
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{ |
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if (null === $item) { |
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if (null === $resourceClass) { |
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throw Error::createLocatedError('Resource class cannot be determined.', $info->fieldNodes, $info->path); |
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} |
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return $resourceClass; |
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} |
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$itemClass = $this->getObjectClass($item); |
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if (null === $resourceClass) { |
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return $itemClass; |
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} |
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if ($resourceClass !== $itemClass) { |
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throw Error::createLocatedError(sprintf($errorMessage, (new \ReflectionClass($resourceClass))->getShortName(), (new \ReflectionClass($itemClass))->getShortName()), $info->fieldNodes, $info->path); |
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} |
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return $resourceClass; |
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} |
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} |
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api-platform /
core
