Extracted middleware and handlers

src/Http/Middleware/WebSocketHandler.php

@@ -0,0 +1,71 @@
+<?php
+
+namespace NoccyLabs\Mercureact\Http\Middleware;
+
+use NoccyLabs\Mercureact\Broker\TopicManager;
+use NoccyLabs\Mercureact\Configuration;
+use NoccyLabs\React\WebSocket\WebSocketConnection;
+use NoccyLabs\React\WebSocket\WebSocketMiddleware;
+use Psr\Http\Message\ServerRequestInterface;
+use React\EventLoop\Loop;
+use React\EventLoop\LoopInterface;
+use React\Promise\Promise;
+use React\Promise\PromiseInterface;
+use SplObjectStorage;
+
+class WebSocketHandler
+{
+    private LoopInterface $loop;
+
+    private WebSocketMiddleware $webSocket;
+
+    public function __construct(
+        private Configuration $config,
+        private SplObjectStorage $webSocketClients,
+        private TopicManager $topicManager,
+        ?LoopInterface $loop=null
+    )
+    {
+        $this->loop = $loop ?? Loop::get();
+
+        $this->webSocket = new WebSocketMiddleware();
+        $this->webSocket->on(WebSocketMiddleware::EVENT_CONNECTION, $this->onWebSocketConnection(...));
+    }
+
+    /**
+     * 
+     * 
+     * @param ServerRequestInterface $request
+     * @param callable $next
+     * @return PromiseInterface
+     */
+    public function __invoke(ServerRequestInterface $request, callable $next): PromiseInterface
+    {
+        return new Promise(
+            function (callable $resolve, callable $reject) use ($next, $request) {
+                if ($request->getUri()->getPath() == "/.well-known/mercure")
+                    $resolve(call_user_func($this->webSocket, $request, $next));
+                else 
+                    $resolve($next($request));
+            }
+        );
+    }
+
+    /**
+     * 
+     * 
+     */
+    private function onWebSocketConnection(WebSocketConnection $connection)
+    {
+        $this->webSocketClients->attach($connection);
+
+        $connection->on('close', function () use ($connection) {
+            $this->webSocketClients->detach($connection);
+        });
+
+        $request = $connection->getServerRequest();
+        $topic = $request->getQueryParams()['topic'][0]??'';
+        $connection->setGroup($topic);
+    }
+
+}