--- /dev/null
+<?php
+
+namespace Drupal\{{ machine_name }}\Form;
+
+use Drupal\Core\Entity\BundleEntityFormBase;
+use Drupal\Core\Entity\EntityManagerInterface;
+use Drupal\Core\Entity\EntityTypeInterface;
+use Drupal\Core\Form\FormStateInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Form handler for {{ entity_type_label|lower }} type forms.
+ */
+class {{ class_prefix }}TypeForm extends BundleEntityFormBase {
+
+ /**
+ * The entity manager.
+ *
+ * @var \Drupal\Core\Entity\EntityManagerInterface
+ */
+ protected $entityManager;
+
+ /**
+ * Constructs the {{ class_prefix }}TypeForm object.
+ *
+ * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
+ * The entity manager.
+ */
+ public function __construct(EntityManagerInterface $entity_manager) {
+ $this->entityManager = $entity_manager;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container) {
+ return new static(
+ $container->get('entity.manager')
+ );
+ }
+
+ /**
+ * {@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 {{ entity_type_label|lower }} type');
+ }
+ else {
+ $form['#title'] = $this->t(
+ 'Edit %label {{ entity_type_label|lower }} 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 {{ entity_type_label|lower }} type.'),
+ '#required' => TRUE,
+ '#size' => 30,
+ ];
+
+ $form['id'] = [
+ '#type' => 'machine_name',
+ '#default_value' => $entity_type->id(),
+ '#maxlength' => EntityTypeInterface::BUNDLE_MAX_LENGTH,
+ '#machine_name' => [
+ 'exists' => ['Drupal\{{ machine_name }}\Entity\{{ class_prefix }}Type', 'load'],
+ 'source' => ['label'],
+ ],
+ '#description' => $this->t('A unique machine-readable name for this {{ entity_type_label|lower }} type. It must only contain lowercase letters, numbers, and underscores.'),
+ ];
+
+ 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 {{ entity_type_label|lower }} type');
+ $actions['delete']['#value'] = $this->t('Delete {{ entity_type_label|lower }} type');
+ return $actions;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function save(array $form, FormStateInterface $form_state) {
+ $entity_type = $this->entity;
+
+ $entity_type->set('id', trim($entity_type->id()));
+ $entity_type->set('label', trim($entity_type->label()));
+
+ $status = $entity_type->save();
+
+ $t_args = ['%name' => $entity_type->label()];
+
+ if ($status == SAVED_UPDATED) {
+ $message = 'The {{ entity_type_label|lower }} type %name has been updated.';
+ }
+ elseif ($status == SAVED_NEW) {
+ $message = 'The {{ entity_type_label|lower }} type %name has been added.';
+ }
+ drupal_set_message($this->t($message, $t_args));
+
+ $this->entityManager->clearCachedFieldDefinitions();
+ $form_state->setRedirectUrl($entity_type->urlInfo('collection'));
+ }
+
+}