Cronjobs implemented

app/Tasks/CloseEvent.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Tasks;
+
+use App\Models\Event;
+use App\Repositories\EventRepository;
+
+class CloseEvent implements CronTask {
+    public function handle(): void
+    {
+        $now = now();
+        $eventRepository = new EventRepository();
+        /** @var Event $event */
+        foreach ($eventRepository->getAvailable(false) as $event) {
+            if ($event->registration_final_end < $now ) {
+                $event->registration_allowed = false;
+                $event->save();
+            }
+        }
+    }
+}