Event Listeners MetaModels Contao Frontend Editing Permission Owner

event_listeners.php

<?php

use ContaoCommunityAlliance\DcGeneral\Event\PreEditModelEvent;
use ContaoCommunityAlliance\DcGeneral\Event\PrePersistModelEvent;

// Copy-replace following vars:
// 'mm_employee'
// 'owner'

return [
   PreEditModelEvent::NAME => [
       function (PreEditModelEvent $event) {
           if ('FE' !== TL_MODE
               || 'mm_employee' !== $event->getEnvironment()
                   ->getDataDefinition()
                   ->getBasicDefinition()
                   ->getDataProvider()) {
               return;
           }
           /** @var \MetaModels\DcGeneral\Data\Model $model */
           $model = $event->getModel();

           if ($model->getItem()->get('owner') !== \Contao\FrontendUser::getInstance()->id) {
               die_nicely('be_forbidden', 'Forbidden');
           }
       },
   ],
   PrePersistModelEvent::NAME => [
       function (PrePersistModelEvent $event) {
           if ('FE' !== TL_MODE
               || 'mm_employee' !== $event->getEnvironment()
                   ->getDataDefinition()
                   ->getBasicDefinition()
                   ->getDataProvider()) {
               return;
           }
           /** @var \MetaModels\DcGeneral\Data\Model $model */
           $model = $event->getModel();

           if (null === $model->getItem()->get('owner')) {
               $model->getItem()->set('owner', \Contao\FrontendUser::getInstance()->id);
           }
       },
   ],
];