Use event extender where possible

filter extender will eliminate the last callback-style extender before stable.

extensions/sticky/extend.php

@@ -9,8 +9,12 @@
 
 use Flarum\Api\Controller\ListDiscussionsController;
 use Flarum\Api\Serializer\DiscussionSerializer;
+use Flarum\Discussion\Event\Saving;
 use Flarum\Extend;
+use Flarum\Sticky\Event\DiscussionWasStickied;
+use Flarum\Sticky\Event\DiscussionWasUnstickied;
 use Flarum\Sticky\Listener;
+use Flarum\Sticky\Listener\SaveStickyToDatabase;
 use Flarum\Sticky\Post\DiscussionStickiedPost;
 use Illuminate\Contracts\Events\Dispatcher;
 
@@ -38,9 +42,13 @@ return [
 
     new Extend\Locales(__DIR__.'/locale'),
 
+    (new Extend\Event())
+        ->listen(Saving::class, SaveStickyToDatabase::class)
+        ->listen(DiscussionWasStickied::class, [Listener\CreatePostWhenDiscussionIsStickied::class, 'whenDiscussionWasStickied'])
+        ->listen(DiscussionWasUnstickied::class, [Listener\CreatePostWhenDiscussionIsStickied::class, 'whenDiscussionWasUnstickied']),
+
     function (Dispatcher $events) {
-        $events->subscribe(Listener\CreatePostWhenDiscussionIsStickied::class);
+        // Replace with Filter extender before stable
         $events->subscribe(Listener\PinStickiedDiscussionsToTop::class);
-        $events->subscribe(Listener\SaveStickyToDatabase::class);
     },
 ];

extensions/sticky/src/Listener/CreatePostWhenDiscussionIsStickied.php

@@ -14,25 +14,15 @@ use Flarum\Sticky\Event\DiscussionWasStickied;
 use Flarum\Sticky\Event\DiscussionWasUnstickied;
 use Flarum\Sticky\Post\DiscussionStickiedPost;
 use Flarum\User\User;
-use Illuminate\Contracts\Events\Dispatcher;
 
 class CreatePostWhenDiscussionIsStickied
 {
-    /**
-     * @param Dispatcher $events
-     */
-    public function subscribe(Dispatcher $events)
-    {
-        $events->listen(DiscussionWasStickied::class, [$this, 'whenDiscussionWasStickied']);
-        $events->listen(DiscussionWasUnstickied::class, [$this, 'whenDiscussionWasUnstickied']);
-    }
-
     /**
      * @param DiscussionWasStickied $event
      */
     public function whenDiscussionWasStickied(DiscussionWasStickied $event)
     {
-        $this->stickyChanged($event->discussion, $event->user, true);
+        static::stickyChanged($event->discussion, $event->user, true);
     }
 
     /**
@@ -40,7 +30,7 @@ class CreatePostWhenDiscussionIsStickied
      */
     public function whenDiscussionWasUnstickied(DiscussionWasUnstickied $event)
     {
-        $this->stickyChanged($event->discussion, $event->user, false);
+        static::stickyChanged($event->discussion, $event->user, false);
     }
 
     /**
@@ -48,7 +38,7 @@ class CreatePostWhenDiscussionIsStickied
      * @param User $user
      * @param bool $isSticky
      */
-    protected function stickyChanged(Discussion $discussion, User $user, $isSticky)
+    protected static function stickyChanged(Discussion $discussion, User $user, $isSticky)
     {
         $post = DiscussionStickiedPost::reply(
             $discussion->id,

extensions/sticky/src/Listener/SaveStickyToDatabase.php

@@ -12,22 +12,13 @@ namespace Flarum\Sticky\Listener;
 use Flarum\Discussion\Event\Saving;
 use Flarum\Sticky\Event\DiscussionWasStickied;
 use Flarum\Sticky\Event\DiscussionWasUnstickied;
-use Illuminate\Contracts\Events\Dispatcher;
 
 class SaveStickyToDatabase
 {
-    /**
-     * @param Dispatcher $events
-     */
-    public function subscribe(Dispatcher $events)
-    {
-        $events->listen(Saving::class, [$this, 'whenSaving']);
-    }
-
     /**
      * @param Saving $event
      */
-    public function whenSaving(Saving $event)
+    public function handle(Saving $event)
     {
         if (isset($event->data['attributes']['isSticky'])) {
             $isSticky = (bool) $event->data['attributes']['isSticky'];