rng-3.x-dev/src/Form/EventTypeDeleteForm.php

<?php

namespace Drupal\rng\Form;

use Drupal\Core\Entity\EntityConfirmFormBase;
use Drupal\Core\Url;
use Drupal\Core\Form\FormStateInterface;

/**
 * Form controller to delete event configs.
 */
class EventTypeDeleteForm extends EntityConfirmFormBase {

  /**
   * {@inheritdoc}
   */
  public function getQuestion() {
    return $this->t('Are you sure you want to delete event type %label?', [
      '%label' => $this->entity->label(),
    ]);
  }

  /**
   * {@inheritdoc}
   */
  public function getConfirmText() {
    return $this->t('Delete');
  }

  /**
   * {@inheritdoc}
   */
  public function getCancelUrl() {
    return new Url('rng.rng_event_type.overview');
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    $this->entity->delete();
    $this->messenger()->addMessage(t('Event type %label was deleted.', [
      '%label' => $this->entity->label(),
    ]));
    $form_state->setRedirectUrl($this->getCancelUrl());
  }

}