allowing configurable flood gate (#1411)

* allowing configurable flood gate

* fixed review comments

src/Post/Event/CheckingForFlooding.php

@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * (c) Toby Zerner <toby.zerner@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Flarum\Post\Event;
+
+use Flarum\User\User;
+
+class CheckingForFlooding
+{
+    /**
+     * @var User
+     */
+    public $actor;
+
+    /**
+     * @param User|null $actor
+     */
+    public function __construct(User $actor = null)
+    {
+        $this->actor = $actor;
+    }
+}

src/Post/Floodgate.php

@@ -12,14 +12,26 @@
 namespace Flarum\Post;
 
 use DateTime;
+use Flarum\Post\Event\CheckingForFlooding;
 use Flarum\Post\Exception\FloodingException;
 use Flarum\User\User;
+use Illuminate\Contracts\Events\Dispatcher;
 
 class Floodgate
 {
+    /**
+     * @var Dispatcher
+     */
+    protected $events;
+
+    public function __construct(Dispatcher $events)
+    {
+        $this->events = $events;
+    }
+
     /**
      * @param User $actor
-     * @throws \Flarum\Post\Exception\FloodingException
+     * @throws FloodingException
      */
     public function assertNotFlooding(User $actor)
     {
@@ -32,8 +44,12 @@ class Floodgate
      * @param User $actor
      * @return bool
      */
-    public function isFlooding(User $actor)
+    public function isFlooding(User $actor): bool
     {
-        return Post::where('user_id', $actor->id)->where('time', '>=', new DateTime('-10 seconds'))->exists();
+        $isFlooding = $this->events->until(
+            new CheckingForFlooding($actor)
+        );
+
+        return $isFlooding ?? Post::where('user_id', $actor->id)->where('time', '>=', new DateTime('-10 seconds'))->exists();
     }
 }