Implement push notifications

extensions/pusher/src/Api/AuthAction.php

@@ -0,0 +1,37 @@
+<?php namespace Flarum\Pusher\Api;
+
+use Flarum\Api\Actions\JsonApiAction;
+use Flarum\Api\Request;
+use Flarum\Core\Settings\SettingsRepository;
+use Zend\Diactoros\Response\JsonResponse;
+use Zend\Diactoros\Response\EmptyResponse;
+use Pusher;
+
+class AuthAction extends JsonApiAction
+{
+    protected $settings;
+
+    public function __construct(SettingsRepository $settings)
+    {
+        $this->settings = $settings;
+    }
+
+    protected function respond(Request $request)
+    {
+        $userChannel = 'private-user' . $request->actor->id;
+
+        if ($request->get('channel_name') === $userChannel) {
+            $pusher = new Pusher(
+                $this->settings->get('pusher.app_key'),
+                $this->settings->get('pusher.app_secret'),
+                $this->settings->get('pusher.app_id')
+            );
+
+            $payload = json_decode($pusher->socket_auth($userChannel, $request->get('socket_id')), true);
+
+            return new JsonResponse($payload);
+        }
+
+        return new EmptyResponse(403);
+    }
+}

extensions/pusher/src/Listeners/AddApiAttributes.php

@@ -1,6 +1,7 @@
 <?php namespace Flarum\Pusher\Listeners;
 
 use Flarum\Events\ApiAttributes;
+use Flarum\Events\RegisterApiRoutes;
 use Illuminate\Contracts\Events\Dispatcher;
 use Flarum\Api\Serializers\ForumSerializer;
 
@@ -9,6 +10,7 @@ class AddApiAttributes
     public function subscribe(Dispatcher $events)
     {
         $events->listen(ApiAttributes::class, [$this, 'addAttributes']);
+        $events->listen(RegisterApiRoutes::class, [$this, 'addRoutes']);
     }
 
     public function addAttributes(ApiAttributes $event)
@@ -17,4 +19,9 @@ class AddApiAttributes
             $event->attributes['pusherKey'] = app('Flarum\Core\Settings\SettingsRepository')->get('pusher.app_key');
         }
     }
+
+    public function addRoutes(RegisterApiRoutes $event)
+    {
+        $event->post('/pusher/auth', 'pusher.auth', 'Flarum\Pusher\Api\AuthAction');
+    }
 }

extensions/pusher/src/Listeners/PushNewPosts.php

@@ -1,6 +1,7 @@
 <?php namespace Flarum\Pusher\Listeners;
 
 use Flarum\Events\PostWasPosted;
+use Flarum\Events\NotificationWillBeSent;
 use Illuminate\Contracts\Events\Dispatcher;
 use Flarum\Core\Settings\SettingsRepository;
 use Flarum\Core\Users\Guest;
@@ -19,16 +20,13 @@ class PushNewPosts
     public function subscribe(Dispatcher $events)
     {
         $events->listen(PostWasPosted::class, [$this, 'pushNewPost']);
+        $events->listen(NotificationWillBeSent::class, [$this, 'pushNotification']);
     }
 
     public function pushNewPost(PostWasPosted $event)
     {
         if ($event->post->isVisibleTo(new Guest)) {
-            $pusher = new Pusher(
-                $this->settings->get('pusher.app_key'),
-                $this->settings->get('pusher.app_secret'),
-                $this->settings->get('pusher.app_id')
-            );
+            $pusher = $this->getPusher();
 
             $pusher->trigger('public', 'newPost', [
                 'postId' => $event->post->id,
@@ -37,4 +35,25 @@ class PushNewPosts
             ]);
         }
     }
+
+    public function pushNotification(NotificationWillBeSent $event)
+    {
+        $pusher = $this->getPusher();
+        $blueprint = $event->blueprint;
+
+        foreach ($event->users as $user) {
+            if ($user->shouldAlert($blueprint::getType())) {
+                $pusher->trigger('private-user' . $user->id, 'notification', null);
+            }
+        }
+    }
+
+    protected function getPusher()
+    {
+        return new Pusher(
+            $this->settings->get('pusher.app_key'),
+            $this->settings->get('pusher.app_secret'),
+            $this->settings->get('pusher.app_id')
+        );
+    }
 }