Add statistic tracking

app/Contracts/StatisticsCollector.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Contracts;
+
+interface StatisticsCollector
+{
+    public function siteShared($authToken = null);
+
+    public function portShared($authToken = null);
+
+    public function incomingRequest();
+
+    public function flush();
+
+    public function save();
+
+    public function shouldCollectStatistics(): bool;
+}

app/Contracts/StatisticsRepository.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace App\Contracts;
+
+use React\Promise\PromiseInterface;
+
+interface StatisticsRepository
+{
+    public function getStatistics($from, $until): PromiseInterface;
+}

app/Contracts/UserRepository.php

@@ -19,4 +19,6 @@ interface UserRepository
     public function deleteUser($id): PromiseInterface;
 
     public function getUsersByTokens(array $authTokens): PromiseInterface;
+
+    public function updateLastSharedAt($id): PromiseInterface;
 }