cc-1.0.x-dev/modules/cc_account/src/Form/CcAccountTypeForm.php

<?php

namespace Drupal\cc_account\Form;

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

/**
 * Form handler for cryptocurrency account type forms.
 */
class CcAccountTypeForm extends BundleEntityFormBase {

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

    $entity_type = $this->entity;
    if ($this->operation == 'add') {
      $form['#title'] = $this->t('Add cryptocurrency account type');
    }
    else {
      $form['#title'] = $this->t('Edit %label cryptocurrency account type', ['%label' => $entity_type->label()]);
    }

    $form['label'] = [
      '#title' => $this->t('Label'),
      '#type' => 'textfield',
      '#default_value' => $entity_type->label(),
      '#description' => $this->t('The human-readable name of this cryptocurrency account type.'),
      '#required' => TRUE,
      '#size' => 30,
    ];

    $form['id'] = [
      '#type' => 'machine_name',
      '#default_value' => $entity_type->id(),
      '#maxlength' => 32,
      '#disabled' => !$entity_type->isNew(),
      '#machine_name' => [
        'exists' => ['Drupal\cc_account\Entity\CcAccountType', 'load'],
        'source' => ['label'],
      ],
      '#description' => $this->t('A unique machine-readable name for this cryptocurrency account type. It must only contain lowercase letters, numbers, and underscores.'),
    ];

    $form['description'] = [
      '#title' => $this->t('Description'),
      '#type' => 'textarea',
      '#default_value' => $entity_type->getDescription(),
      '#description' => $this->t('A brief description of this cryptocurrency account type.'),
    ];

    return $this->protectBundleIdElement($form);
  }

  /**
   * {@inheritdoc}
   */
  protected function actions(array $form, FormStateInterface $form_state) {
    $actions = parent::actions($form, $form_state);
    $actions['submit']['#value'] = $this->t('Save account type');
    $actions['delete']['#value'] = $this->t('Delete account type');
    return $actions;
  }

  /**
   * {@inheritdoc}
   */
  public function save(array $form, FormStateInterface $form_state) {
    $entity_type = $this->entity;
    $status = $entity_type->save();
    $message_arguments = ['%label' => $entity_type->label()];

    if ($status == SAVED_UPDATED) {
      $message = $this->t('The cryptocurrency account type %label has been updated.', $message_arguments);
    }
    else {
      $message = $this->t('The cryptocurrency account type %label has been added.', $message_arguments);
    }

    $this->messenger()->addStatus($message);
    $form_state->setRedirectUrl($entity_type->toUrl('collection'));

    return $status;
  }

}