Feature: #107382 - PSR-14 before form deletion 

Description 

A new PSR-14 event BeforeFormIsDeletedEvent has been introduced. It serves as a direct replacement for the now removed hook $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['ext/form']['beforeFormDelete'] .

The new event is dispatched immediately before a form is deleted in the backend.

The event provides the following public properties:

• $formPersistenceIdentifier: The form persistence identifier (read-only)
• $preventDeletion: A boolean flag that can be set to true to prevent the deletion of the form

The new event is stoppable. As soon as $preventDeletion is set to true, no further listener is called.

Example 

An example event listener could look like this:

namespace MyVendor\MyExtension\Form\EventListener;

use TYPO3\CMS\Core\Attribute\AsEventListener;
use TYPO3\CMS\Form\Event\BeforeFormIsDeletedEvent;

final class BeforeFormIsDeletedEventListener
{
    #[AsEventListener('my_extension/before-form-is-deleted')]
    public function __invoke(BeforeFormIsDeletedEvent $event): void
    {
        $event->preventDeletion = true;
        $persistenceIdentifier = $event->formPersistenceIdentifier;
        // Do something with the persistence identifier
    }
}

Impact 

With the new BeforeFormIsDeletedEvent , it is now possible to prevent the deletion of a form and to add custom logic based on the delete action.