flexiform-8.x-1.x-dev/contrib/wizard/src/Form/WizardForm.php

<?php

namespace Drupal\flexiform_wizard\Form;

use Drupal\Core\Entity\EntityForm;
use Drupal\Core\Form\FormStateInterface;

/**
 * Form to configure flexiform wizards.
 */
class WizardForm extends EntityForm {

  /**
   * {@inheritdoc}
   */
  public function form(array $form, FormStateInterface $form_state) {
    $entity = $this->entity;

    $form['label'] = [
      '#type' => 'textfield',
      '#title' => $this->t('Wizard Name'),
      '#default_value' => $entity->label(),
      '#size' => 30,
      '#required' => TRUE,
      '#maxlength' => 64,
      '#description' => $this->t('The name of this wizard.'),
    ];
    $form['id'] = [
      '#type' => 'machine_name',
      '#default_value' => $entity->id(),
      '#required' => TRUE,
      '#disabled' => !$entity->isNew(),
      '#size' => 30,
      '#maxlength' => 64,
      '#machine_name' => [
        'exists' => ['\Drupal\flexiform_wizard\Entity\Wizard', 'load'],
      ],
    ];
    $form['path'] = [
      '#type' => 'textfield',
      '#title' => $this->t('Path'),
      '#default_value' => $entity->get('path'),
      '#required' => TRUE,
      '#description' => $this->t('The path the wizard should reside at.'),
    ];

    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    parent::submitForm($form, $form_state);

    $form_state->setRedirect('entity.flexiform_wizard.edit_form', ['flexiform_wizard' => $this->entity->id()]);
  }

}