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<?php |
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/******************************************************************************* |
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* This file is part of the GraphQL Bundle package. |
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* |
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* (c) YnloUltratech <[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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namespace Ynlo\GraphQLBundle\Subscription; |
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use Symfony\Component\EventDispatcher\EventSubscriberInterface; |
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use Symfony\Component\HttpFoundation\RequestStack; |
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use Symfony\Component\HttpFoundation\Session\Session; |
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use Symfony\Component\Security\Core\AuthenticationEvents; |
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use Symfony\Component\Security\Core\Event\AuthenticationEvent; |
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use Ynlo\GraphQLBundle\Definition\Registry\Endpoint; |
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use Ynlo\GraphQLBundle\Events\GraphQLEvents; |
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use Ynlo\GraphQLBundle\Events\GraphQLOperationEvent; |
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use Ynlo\GraphQLBundle\Resolver\ResolverContext; |
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use Ynlo\GraphQLBundle\Util\Uuid; |
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/** |
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* The subscriber is a resolver that resolve subscriptions and return a subscription link |
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* act as a middleware before the real subscription resolver is executed |
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*/ |
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class Subscriber implements EventSubscriberInterface |
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{ |
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/** |
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* @var string |
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*/ |
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protected $mercureHubUrl; |
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/** |
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* @var SubscriptionManager |
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*/ |
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protected $subscriptionManager; |
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/** |
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* @var RequestStack |
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*/ |
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protected $requestStack; |
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/** |
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* @var string |
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*/ |
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protected $username; |
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/** |
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* @var Endpoint |
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*/ |
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protected $endpoint; |
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/** |
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* Subscriber constructor. |
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* |
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* @param RequestStack $requestStack |
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* @param SubscriptionManager $subscriptionManager |
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*/ |
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public function __construct(RequestStack $requestStack, ?SubscriptionManager $subscriptionManager = null) |
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{ |
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$this->requestStack = $requestStack; |
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$this->subscriptionManager = $subscriptionManager; |
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} |
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/** |
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* @param array $mercureHubsUrls |
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* @param string $hub |
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*/ |
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public function setMercureHubUrl(array $mercureHubsUrls, $hub) |
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{ |
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$this->mercureHubUrl = $mercureHubsUrls[$hub]; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public static function getSubscribedEvents(): array |
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{ |
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return [ |
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GraphQLEvents::OPERATION_START => 'operationStart', |
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AuthenticationEvents::AUTHENTICATION_SUCCESS => 'onSymfonyAuthSuccess', |
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]; |
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} |
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/** |
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* @param AuthenticationEvent $event |
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*/ |
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public function onSymfonyAuthSuccess(AuthenticationEvent $event): void |
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{ |
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$this->username = $event->getAuthenticationToken()->getUsername(); |
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} |
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/** |
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* @param GraphQLOperationEvent $event |
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*/ |
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public function operationStart(GraphQLOperationEvent $event): void |
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{ |
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$this->endpoint = $event->getEndpoint(); |
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} |
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/** |
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* @param ResolverContext $context |
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* @param array $args |
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* |
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* @return SubscriptionLink |
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* |
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* @throws \Exception |
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*/ |
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public function __invoke(ResolverContext $context, $args = []) |
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{ |
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$request = $this->requestStack->getCurrentRequest(); |
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if (!$request) { |
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throw new \RuntimeException('Missing required request'); |
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} |
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if ($request->getSession()) { |
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//clear session |
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$request->setSession(new Session()); |
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} |
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// subscriptions are created with a very lowest expiration date |
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// if the client does not connect to given subscription in x seconds the subscription is automatically deleted |
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$expireAt = new \DateTime('+10seconds'); |
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$id = Uuid::createFromData( |
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[ |
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$this->username, |
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$this->endpoint, |
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$request->getUri(), |
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$request->getContent(), |
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] |
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); |
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$subscriptionName = $this->endpoint->getSubscriptionNameForResolver($context->getDefinition()->getResolver()); |
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$this->subscriptionManager->subscribe($id, $subscriptionName, $args, $request, $expireAt); |
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return new SubscriptionLink(sprintf('%s?topic=%s', $this->mercureHubUrl, $id)); |
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} |
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} |
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ynloultratech /
graphql-bundle
