class MenuFormController

class MenuFormController extends EntityFormController {

  /**
   * Overrides Drupal\Core\Entity\EntityFormController::form().
   */
  public function form(array $form, array &$form_state) {
    $form = parent::form($form, $form_state);
    $menu = $this->entity;
    $system_menus = menu_list_system_menus();
    $form_state['menu'] =& $menu;
    $form['label'] = array(
      '#type' => 'textfield',
      '#title' => t('Title'),
      '#default_value' => $menu
        ->label(),
      '#required' => TRUE,
    );
    $form['id'] = array(
      '#type' => 'machine_name',
      '#title' => t('Menu name'),
      '#default_value' => $menu
        ->id(),
      '#maxlength' => MENU_MAX_MENU_NAME_LENGTH_UI,
      '#description' => t('A unique name to construct the URL for the menu. It must only contain lowercase letters, numbers and hyphens.'),
      '#machine_name' => array(
        'exists' => 'menu_edit_menu_name_exists',
        'source' => array(
          'label',
        ),
        'replace_pattern' => '[^a-z0-9-]+',
        'replace' => '-',
      ),
      // A menu's machine name cannot be changed.
      '#disabled' => !$menu
        ->isNew() || isset($system_menus[$menu
        ->id()]),
    );
    $form['description'] = array(
      '#type' => 'textfield',
      '#title' => t('Administrative summary'),
      '#maxlength' => 512,
      '#default_value' => $menu->description,
    );

    // Add menu links administration form for existing menus.
    if (!$menu
      ->isNew() || isset($system_menus[$menu
      ->id()])) {

      // Form API supports constructing and validating self-contained sections
      // within forms, but does not allow to handle the form section's submission
      // equally separated yet. Therefore, we use a $form_state key to point to
      // the parents of the form section.
      // @see menu_overview_form_submit()
      $form_state['menu_overview_form_parents'] = array(
        'links',
      );
      $form['links'] = array();
      $form['links'] = menu_overview_form($form['links'], $form_state);
    }
    return $form;
  }

  /**
   * Overrides Drupal\Core\Entity\EntityFormController::actions().
   */
  protected function actions(array $form, array &$form_state) {
    $actions = parent::actions($form, $form_state);
    $menu = $this->entity;
    $system_menus = menu_list_system_menus();
    $actions['delete']['#access'] = !$menu
      ->isNew() && !isset($system_menus[$menu
      ->id()]);
    return $actions;
  }

  /**
   * Overrides Drupal\Core\Entity\EntityFormController::save().
   */
  public function save(array $form, array &$form_state) {
    $menu = $this->entity;
    $system_menus = menu_list_system_menus();
    if (!$menu
      ->isNew() || isset($system_menus[$menu
      ->id()])) {
      menu_overview_form_submit($form, $form_state);
    }
    if ($menu
      ->isNew()) {

      // Add 'menu-' to the menu name to help avoid name-space conflicts.
      $menu
        ->set('id', 'menu-' . $menu
        ->id());
    }
    $status = $menu
      ->save();
    $uri = $menu
      ->uri();
    if ($status == SAVED_UPDATED) {
      drupal_set_message(t('Menu %label has been updated.', array(
        '%label' => $menu
          ->label(),
      )));
      watchdog('menu', 'Menu %label has been updated.', array(
        '%label' => $menu
          ->label(),
      ), WATCHDOG_NOTICE, l(t('Edit'), $uri['path'] . '/edit'));
    }
    else {
      drupal_set_message(t('Menu %label has been added.', array(
        '%label' => $menu
          ->label(),
      )));
      watchdog('menu', 'Menu %label has been added.', array(
        '%label' => $menu
          ->label(),
      ), WATCHDOG_NOTICE, l(t('Edit'), $uri['path'] . '/edit'));
    }
    $form_state['redirect'] = 'admin/structure/menu/manage/' . $menu
      ->id();
  }

  /**
   * Overrides Drupal\Core\Entity\EntityFormController::delete().
   */
  public function delete(array $form, array &$form_state) {
    $menu = $this->entity;
    $form_state['redirect'] = 'admin/structure/menu/manage/' . $menu
      ->id() . '/delete';
  }

}