Add WillReactToPost event (#61)

* remove dead code

* Add `WillReactToPost` event

* fix code style

* fix import order

src/Event/WillReactToPost.php

@@ -0,0 +1,54 @@
+<?php
+
+/*
+ * This file is part of fof/reactions.
+ *
+ * Copyright (c) FriendsOfFlarum.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace FoF\Reactions\Event;
+
+use Flarum\Post\Post;
+use Flarum\User\User;
+use FoF\Reactions\Reaction;
+
+class WillReactToPost
+{
+    /**
+     * @var Post
+     */
+    public $post;
+
+    /**
+     * @var User
+     */
+    public $user;
+
+    /**
+     * @var Reaction
+     */
+    public $reaction;
+
+    /**
+     * @var bool
+     */
+    public $changed;
+
+    /**
+     * WillReactToPost constructor.
+     *
+     * @param Post $post
+     * @param User $user
+     * @param $reaction
+     * @param bool $changed
+     */
+    public function __construct(Post $post, User $user, Reaction $reaction, $changed = false)
+    {
+        $this->post = $post;
+        $this->user = $user;
+        $this->reaction = $reaction;
+    }
+}

src/Listener/SaveReactionsToDatabase.php

@@ -21,8 +21,10 @@
 use FoF\Gamification\Listeners\SaveVotesToDatabase;
 use FoF\Reactions\Event\PostWasReacted;
 use FoF\Reactions\Event\PostWasUnreacted;
+use FoF\Reactions\Event\WillReactToPost;
 use FoF\Reactions\PostReaction;
 use FoF\Reactions\Reaction;
+use Illuminate\Contracts\Events\Dispatcher;
 use Illuminate\Support\Arr;
 use Pusher;
 use Symfony\Contracts\Translation\TranslatorInterface;
@@ -44,11 +46,17 @@ class SaveReactionsToDatabase
      */
     protected $extensions;
 
-    public function __construct(SettingsRepositoryInterface $settings, TranslatorInterface $translator, ExtensionManager $extensions)
+    /**
+     * @var Dispatcher
+     */
+    protected $events;
+
+    public function __construct(SettingsRepositoryInterface $settings, TranslatorInterface $translator, ExtensionManager $extensions, Dispatcher $events)
     {
         $this->settings = $settings;
         $this->translator = $translator;
         $this->extensions = $extensions;
+        $this->events = $events;
     }
 
     /**
@@ -66,12 +74,13 @@ public function handle(Saving $event)
             $actor = $event->actor;
 
             $reactionId = Arr::get($data, 'attributes.reaction');
-            $reactionIdentifier = null;
 
             $actor->assertCan('react', $post);
 
             $reaction = !is_null($reactionId) ? Reaction::where('id', $reactionId)->first() : null;
 
+            $this->events->dispatch(new WillReactToPost($post, $actor, $reaction));
+
             $gamification = $this->extensions->isEnabled('fof-gamification');
             $likes = $this->extensions->isEnabled('flarum-likes');