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<?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\GraphQl\Resolver\Factory;
use ApiPlatform\GraphQl\Resolver\Stage\ReadStageInterface;
use ApiPlatform\GraphQl\Resolver\Stage\SecurityStageInterface;
use ApiPlatform\GraphQl\Resolver\Stage\SerializeStageInterface;
use ApiPlatform\GraphQl\Subscription\MercureSubscriptionIriGeneratorInterface;
use ApiPlatform\GraphQl\Subscription\SubscriptionManagerInterface;
use ApiPlatform\Metadata\GraphQl\Operation;
use ApiPlatform\Util\ClassInfoTrait;
use ApiPlatform\Util\CloneTrait;
use GraphQL\Type\Definition\ResolveInfo;
/**
* Creates a function resolving a GraphQL subscription of an item.
*
* @author Alan Poulain <contact@alanpoulain.eu>
*/
final class ItemSubscriptionResolverFactory implements ResolverFactoryInterface
{
use ClassInfoTrait;
use CloneTrait;
private $readStage;
private $securityStage;
private $serializeStage;
private $subscriptionManager;
private $mercureSubscriptionIriGenerator;
public function __construct(ReadStageInterface $readStage, SecurityStageInterface $securityStage, SerializeStageInterface $serializeStage, SubscriptionManagerInterface $subscriptionManager, ?MercureSubscriptionIriGeneratorInterface $mercureSubscriptionIriGenerator)
{
$this->readStage = $readStage;
$this->securityStage = $securityStage;
$this->serializeStage = $serializeStage;
$this->subscriptionManager = $subscriptionManager;
$this->mercureSubscriptionIriGenerator = $mercureSubscriptionIriGenerator;
}
public function __invoke(?string $resourceClass = null, ?string $rootClass = null, ?Operation $operation = null): callable
{
return function (?array $source, array $args, $context, ResolveInfo $info) use ($resourceClass, $rootClass, $operation) {
if (null === $resourceClass || null === $operation) {
return null;
}
$resolverContext = ['source' => $source, 'args' => $args, 'info' => $info, 'is_collection' => false, 'is_mutation' => false, 'is_subscription' => true];
$item = ($this->readStage)($resourceClass, $rootClass, $operation, $resolverContext);
if (null !== $item && !\is_object($item)) {
throw new \LogicException('Item from read stage should be a nullable object.');
}
($this->securityStage)($resourceClass, $operation, $resolverContext + [
'extra_variables' => [
'object' => $item,
],
]);
$result = ($this->serializeStage)($item, $resourceClass, $operation, $resolverContext);
$subscriptionId = $this->subscriptionManager->retrieveSubscriptionId($resolverContext, $result);
if ($subscriptionId && ($mercure = $operation->getMercure())) {
if (!$this->mercureSubscriptionIriGenerator) {
throw new \LogicException('Cannot use Mercure for subscriptions when MercureBundle is not installed. Try running "composer require mercure".');
}
$hub = \is_array($mercure) ? ($mercure['hub'] ?? null) : null;
$result['mercureUrl'] = $this->mercureSubscriptionIriGenerator->generateMercureUrl($subscriptionId, $hub);
}
return $result;
};
}
}