Add ability to expose TCP connections (#123)

app/Server/Http/Controllers/Admin/ListTcpConnectionsController.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace App\Server\Http\Controllers\Admin;
+
+use App\Contracts\ConnectionManager;
+use App\Server\Configuration;
+use App\Server\Connections\TcpControlConnection;
+use Illuminate\Http\Request;
+use Ratchet\ConnectionInterface;
+
+class ListTcpConnectionsController extends AdminController
+{
+    /** @var ConnectionManager */
+    protected $connectionManager;
+    /** @var Configuration */
+    protected $configuration;
+
+    public function __construct(ConnectionManager $connectionManager, Configuration $configuration)
+    {
+        $this->connectionManager = $connectionManager;
+        $this->configuration = $configuration;
+    }
+
+    public function handle(Request $request, ConnectionInterface $httpConnection)
+    {
+        $sites = $this->getView($httpConnection, 'server.tcp.index', [
+            'scheme' => $this->configuration->port() === 443 ? 'https' : 'http',
+            'configuration' => $this->configuration,
+            'connections' => collect($this->connectionManager->getConnections())
+                ->filter(function ($connection) {
+                    return get_class($connection) === TcpControlConnection::class;
+                })
+                ->map(function ($connection, $connectionId) {
+                    $connection = $connection->toArray();
+                    $connection['id'] = $connectionId;
+
+                    return $connection;
+                })
+                ->values(),
+        ]);
+
+        $httpConnection->send(
+            respond_html($sites)
+        );
+    }
+}