WorkflowDeleteForm.php

<?php

namespace Drupal\workflows\Form;

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

/**
 * Builds the form to delete Workflow entities.
 *
 * @internal
 */
class WorkflowDeleteForm extends EntityConfirmFormBase {
  
  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {
    if ($this->entity
      ->getTypePlugin()
      ->workflowHasData($this->entity)) {
      $form['#title'] = $this->getQuestion();
      $form['description'] = [
        '#markup' => $this->t('This workflow is in use. You cannot remove this workflow until you have removed all content using it.'),
      ];
      return $form;
    }
    return parent::buildForm($form, $form_state);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getQuestion() {
    return $this->t('Are you sure you want to delete %name?', [
      '%name' => $this->entity
        ->label(),
    ]);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getCancelUrl() {
    return new Url('entity.workflow.collection');
  }
  
  /**
   * {@inheritdoc}
   */
  public function getConfirmText() {
    return $this->t('Delete');
  }
  
  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    $this->entity
      ->delete();
    $this->messenger()
      ->addStatus($this->t('Workflow %label deleted.', [
      '%label' => $this->entity
        ->label(),
    ]));
    $form_state->setRedirectUrl($this->getCancelUrl());
  }

}