--- /dev/null
+<?php
+
+namespace Drupal\menu_link_content\Form;
+
+use Drupal\Component\Datetime\TimeInterface;
+use Drupal\Core\Entity\ContentEntityForm;
+use Drupal\Core\Entity\EntityManagerInterface;
+use Drupal\Core\Entity\EntityTypeBundleInfoInterface;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Language\LanguageManagerInterface;
+use Drupal\Core\Menu\MenuParentFormSelectorInterface;
+use Drupal\Core\Path\PathValidatorInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Provides a form to add/update content menu links.
+ */
+class MenuLinkContentForm extends ContentEntityForm {
+
+ /**
+ * The content menu link.
+ *
+ * @var \Drupal\menu_link_content\MenuLinkContentInterface
+ */
+ protected $entity;
+
+ /**
+ * The parent form selector service.
+ *
+ * @var \Drupal\Core\Menu\MenuParentFormSelectorInterface
+ */
+ protected $menuParentSelector;
+
+ /**
+ * The path validator.
+ *
+ * @var \Drupal\Core\Path\PathValidatorInterface
+ */
+ protected $pathValidator;
+
+ /**
+ * Constructs a MenuLinkContentForm object.
+ *
+ * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
+ * The entity manager.
+ * @param \Drupal\Core\Menu\MenuParentFormSelectorInterface $menu_parent_selector
+ * The menu parent form selector service.
+ * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
+ * The language manager.
+ * @param \Drupal\Core\Path\PathValidatorInterface $path_validator
+ * The path validator.
+ * @param \Drupal\Core\Entity\EntityTypeBundleInfoInterface $entity_type_bundle_info
+ * The entity type bundle service.
+ * @param \Drupal\Component\Datetime\TimeInterface $time
+ * The time service.
+ */
+ public function __construct(EntityManagerInterface $entity_manager, MenuParentFormSelectorInterface $menu_parent_selector, LanguageManagerInterface $language_manager, PathValidatorInterface $path_validator, EntityTypeBundleInfoInterface $entity_type_bundle_info = NULL, TimeInterface $time = NULL) {
+ parent::__construct($entity_manager, $entity_type_bundle_info, $time);
+ $this->menuParentSelector = $menu_parent_selector;
+ $this->pathValidator = $path_validator;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container) {
+ return new static(
+ $container->get('entity.manager'),
+ $container->get('menu.parent_form_selector'),
+ $container->get('language_manager'),
+ $container->get('path.validator'),
+ $container->get('entity_type.bundle.info'),
+ $container->get('datetime.time')
+ );
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function form(array $form, FormStateInterface $form_state) {
+ $form = parent::form($form, $form_state);
+
+ $default = $this->entity->getMenuName() . ':' . $this->entity->getParentId();
+ $id = $this->entity->isNew() ? '' : $this->entity->getPluginId();
+ $form['menu_parent'] = $this->menuParentSelector->parentSelectElement($default, $id);
+ $form['menu_parent']['#weight'] = 10;
+ $form['menu_parent']['#title'] = $this->t('Parent link');
+ $form['menu_parent']['#description'] = $this->t('The maximum depth for a link and all its children is fixed. Some menu links may not be available as parents if selecting them would exceed this limit.');
+ $form['menu_parent']['#attributes']['class'][] = 'menu-title-select';
+
+ return $form;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function actions(array $form, FormStateInterface $form_state) {
+ $element = parent::actions($form, $form_state);
+ $element['submit']['#button_type'] = 'primary';
+ $element['delete']['#access'] = $this->entity->access('delete');
+
+ return $element;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildEntity(array $form, FormStateInterface $form_state) {
+ /** @var \Drupal\menu_link_content\MenuLinkContentInterface $entity */
+ $entity = parent::buildEntity($form, $form_state);
+
+ list($menu_name, $parent) = explode(':', $form_state->getValue('menu_parent'), 2);
+
+ $entity->parent->value = $parent;
+ $entity->menu_name->value = $menu_name;
+ $entity->enabled->value = (!$form_state->isValueEmpty(['enabled', 'value']));
+ $entity->expanded->value = (!$form_state->isValueEmpty(['expanded', 'value']));
+
+ return $entity;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function save(array $form, FormStateInterface $form_state) {
+ // The entity is rebuilt in parent::submit().
+ $menu_link = $this->entity;
+ $saved = $menu_link->save();
+
+ if ($saved) {
+ drupal_set_message($this->t('The menu link has been saved.'));
+ $form_state->setRedirect(
+ 'entity.menu_link_content.canonical',
+ ['menu_link_content' => $menu_link->id()]
+ );
+ }
+ else {
+ drupal_set_message($this->t('There was an error saving the menu link.'), 'error');
+ $form_state->setRebuild();
+ }
+ }
+
+}