quiz-6.0.0-alpha4/src/Form/QuizFeedbackTypeForm.php

<?php

namespace Drupal\quiz\Form;

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

/**
 * Edit form for feedback types.
 */
class QuizFeedbackTypeForm extends EntityForm {

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

    $form['label'] = [
      '#title' => $this->t('Label'),
      '#type' => 'textfield',
      '#default_value' => $this->entity->label(),
      '#description' => $this->t('The admin-facing name.'),
      '#required' => TRUE,
    ];

    $form['id'] = [
      '#type' => 'machine_name',
      '#default_value' => $this->entity->id(),
      '#maxlength' => EntityTypeInterface::BUNDLE_MAX_LENGTH,
      '#machine_name' => [
        'exists' => get_class($this->entity) . '::load',
        'source' => ['label'],
      ],
    ];

    $form['description'] = [
      '#title' => $this->t('Description'),
      '#type' => 'textarea',
      '#default_value' => $this->entity->get('description'),
    ];

    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function save(array $form, FormStateInterface $form_state): int {
    $saved = parent::save($form, $form_state);
    $form_state->setRedirect('entity.quiz_feedback_type.collection');
    return $saved;
  }

}