update notification

app/Http/Controllers/NotificationController.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use Illuminate\Http\Request;
+use Illuminate\Notifications\DatabaseNotification;
+
+class NotificationController extends Controller
+{
+    public function markAsRead($id)
+    {
+        $n = DatabaseNotification::find($id);
+        $n->read_at = date('Y-m-d h:i:s');
+        $n->save();
+    }
+
+    public function markAllAsRead()
+    {
+        $notifications = \Auth::user()->unreadNotifications;
+        foreach ($notifications as $n)
+        {
+            $n->read_at = date('Y-m-d h:i:s');
+            $n->save();
+        }
+        return $notifications;
+    }
+}