Cronjobs implemented

app/Tasks/CloseCostUnit.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Tasks;
+
+use App\Models\CostUnit;
+use App\Repositories\CostUnitRepository;
+
+class CloseCostUnit implements CronTask {
+    public function handle(): void
+    {
+        $now = now();
+        $costUnitRepository = new CostUnitRepository();
+        /** @var CostUnit $costUnit */
+        foreach ($costUnitRepository->getCurrentEvents() as $costUnit) {
+            if (\DateTime::createFromFormat('Y-m-d', $costUnit->billing_deadline) < $now ) {
+                $costUnit->allow_new = false;
+                $costUnit->save();
+            }
+        }
+    }
+}