Extract receiver and sender from transport

src/Messenger/NsqSender.php

@@ -0,0 +1,70 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Nsq\NsqBundle\Messenger;
+
+use Nsq\Config\ClientConfig;
+use Nsq\Producer;
+use Psr\Log\LoggerInterface;
+use Symfony\Component\Messenger\Envelope;
+use Symfony\Component\Messenger\Stamp\DelayStamp;
+use Symfony\Component\Messenger\Transport\Sender\SenderInterface;
+use Symfony\Component\Messenger\Transport\Serialization\SerializerInterface;
+use function Amp\Promise\wait;
+use function json_encode;
+use const JSON_THROW_ON_ERROR;
+
+final class NsqSender implements SenderInterface
+{
+    private ?Producer $producer = null;
+
+    public function __construct(
+        private string $address,
+        private string $topic,
+        private ClientConfig $clientConfig,
+        private SerializerInterface $serializer,
+        private LoggerInterface $logger,
+    ) {
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function send(Envelope $envelope): Envelope
+    {
+        $producer = $this->getProducer();
+
+        $encodedMessage = $this->serializer->encode($envelope->withoutAll(NsqReceivedStamp::class));
+        $encodedMessage = json_encode($encodedMessage, JSON_THROW_ON_ERROR | JSON_UNESCAPED_UNICODE);
+
+        /** @var DelayStamp|null $delayStamp */
+        $delayStamp = $envelope->last(DelayStamp::class);
+        $delay = null !== $delayStamp ? $delayStamp->getDelay() : null;
+
+        if (null === $delay) {
+            $promise = $producer->publish($this->topic, $encodedMessage);
+        } else {
+            $promise = $producer->defer($this->topic, $encodedMessage, $delay);
+        }
+
+        wait($promise);
+
+        return $envelope;
+    }
+
+    private function getProducer(): Producer
+    {
+        if (null === $this->producer) {
+            $this->producer = new Producer(
+                $this->address,
+                $this->clientConfig,
+                $this->logger,
+            );
+        }
+
+        wait($this->producer->connect());
+
+        return $this->producer;
+    }
+}