Add statistic tracking

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

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Server\Http\Controllers\Admin;
+
+use App\Contracts\ConnectionManager;
+use App\Contracts\StatisticsRepository;
+use App\Contracts\UserRepository;
+use App\Server\Configuration;
+use App\Server\Connections\ControlConnection;
+use Illuminate\Http\Request;
+use Ratchet\ConnectionInterface;
+
+class GetStatisticsController extends AdminController
+{
+    protected $keepConnectionOpen = true;
+
+    /** @var StatisticsRepository */
+    protected $statisticsRepository;
+
+    public function __construct(StatisticsRepository $statisticsRepository)
+    {
+        $this->statisticsRepository = $statisticsRepository;
+    }
+
+    public function handle(Request $request, ConnectionInterface $httpConnection)
+    {
+        $from = today()->subWeek()->toDateString();
+        $until = today()->toDateString();
+
+        $this->statisticsRepository->getStatistics($request->get('from', $from), $request->get('until', $until))
+            ->then(function ($statistics) use ($httpConnection) {
+                $httpConnection->send(
+                    respond_json([
+                        'statistics' => $statistics,
+                    ])
+                );
+
+                $httpConnection->close();
+            });
+    }
+}