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<?php
/**
 * @file
 * Contains \Drupal\action\ActionFormBase.
 */
namespace Drupal\action;
use Drupal\Core\Entity\EntityForm;
use Drupal\Core\Entity\EntityStorageInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Plugin\PluginFormInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
/**
 * Provides a base form for action forms.
 */
abstract class ActionFormBase extends EntityForm {
  /**
   * The action plugin being configured.
   *
   * @var \Drupal\Core\Action\ActionInterface
   */
  protected $plugin;
  /**
   * The action storage.
   *
   * @var \Drupal\Core\Entity\EntityStorageInterface
   */
  protected $storage;
  /**
   * Constructs a new action form.
   *
   * @param \Drupal\Core\Entity\EntityStorageInterface $storage
   *   The action storage.
   */
  public function __construct(EntityStorageInterface $storage) {
    $this->storage = $storage;
  }
  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static(
      $container->get('entity.manager')->getStorage('action')
    );
  }
  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {
    $this->plugin = $this->entity->getPlugin();
    return parent::buildForm($form, $form_state);
  }
  /**
   * {@inheritdoc}
   */
  public function form(array $form, FormStateInterface $form_state) {
    $form['label'] = array(
      '#type' => 'textfield',
      '#title' => $this->t('Label'),
      '#default_value' => $this->entity->label(),
      '#maxlength' => '255',
      '#description' => $this->t('A unique label for this advanced action. This label will be displayed in the interface of modules that integrate with actions.'),
    );
    $form['id'] = array(
      '#type' => 'machine_name',
      '#default_value' => $this->entity->id(),
      '#disabled' => !$this->entity->isNew(),
      '#maxlength' => 64,
      '#description' => $this->t('A unique name for this action. It must only contain lowercase letters, numbers and underscores.'),
      '#machine_name' => array(
        'exists' => array($this, 'exists'),
      ),
    );
    $form['plugin'] = array(
      '#type' => 'value',
      '#value' => $this->entity->get('plugin'),
    );
    $form['type'] = array(
      '#type' => 'value',
      '#value' => $this->entity->getType(),
    );
    if ($this->plugin instanceof PluginFormInterface) {
      $form += $this->plugin->buildConfigurationForm($form, $form_state);
    }
    return parent::form($form, $form_state);
  }
  /**
   * Determines if the action already exists.
   *
   * @param string $id
   *   The action ID
   *
   * @return bool
   *   TRUE if the action exists, FALSE otherwise.
   */
  public function exists($id) {
    $action = $this->storage->load($id);
    return !empty($action);
  }
  /**
   * {@inheritdoc}
   */
  protected function actions(array $form, FormStateInterface $form_state) {
    $actions = parent::actions($form, $form_state);
    unset($actions['delete']);
    return $actions;
  }
  /**
   * {@inheritdoc}
   */
  public function validateForm(array &$form, FormStateInterface $form_state) {
    parent::validateForm($form, $form_state);
    if ($this->plugin instanceof PluginFormInterface) {
      $this->plugin->validateConfigurationForm($form, $form_state);
    }
  }
  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    parent::submitForm($form, $form_state);
    if ($this->plugin instanceof PluginFormInterface) {
      $this->plugin->submitConfigurationForm($form, $form_state);
    }
  }
  /**
   * {@inheritdoc}
   */
  public function save(array $form, FormStateInterface $form_state) {
    $this->entity->save();
    drupal_set_message($this->t('The action has been successfully saved.'));
    $form_state->setRedirect('entity.action.collection');
  }
}