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());
    }

}