Lots of frame stubs

src/Http2Middleware.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace NoccyLabs\React\Http2;
+
+use NoccyLabs\React\Http2\Connection\Http2Connection;
+use NoccyLabs\React\Http2\Frame\SettingsFrame;
+use Psr\Http\Message\ServerRequestInterface;
+use React\Stream\DuplexResourceStream;
+use React\Stream\DuplexStreamInterface;
+use React\Stream\ThroughStream;
+use SplObjectStorage;
+
+class Http2Middleware
+{
+    /** @var SplObjectStorage<Http2Connection> Active connections */
+    private SplObjectStorage $connections;
+
+    public function __construct()
+    {
+        $this->connections = new SplObjectStorage();
+    }
+
+    public function __invoke(ServerRequestInterface $request, ?callable $next=null)
+    {
+
+    }
+
+    private function parseSettingsFromBase64String(string $settings): SettingsFrame
+    {
+        $decoded = base64_decode($settings);
+        $frame = new SettingsFrame();
+        $frame->parseFrame($decoded);
+        return $frame;
+    }
+
+    private function setupConnection(ServerRequestInterface $request): Http2Connection
+    {
+        $stream = new ThroughStream();
+        $connection = new Http2Connection($stream);
+
+        $this->connections->attach($connection);
+        $connection->on('close', function () use ($connection) {
+            $this->connections->detach($connection);
+        });
+
+        return $connection;
+    }
+}