class FilterFormatListBuilder

class FilterFormatListBuilder extends DraggableListBuilder {
  
  /**
   * {@inheritdoc}
   */
  protected $entitiesKey = 'formats';
  
  /**
   * The config factory service.
   *
   * @var \Drupal\Core\Config\ConfigFactoryInterface
   */
  protected $configFactory;
  
  /**
   * The messenger.
   *
   * @var \Drupal\Core\Messenger\MessengerInterface
   */
  protected $messenger;
  
  /**
   * Constructs a new FilterFormatListBuilder.
   *
   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
   *   The entity type definition.
   * @param \Drupal\Core\Entity\EntityStorageInterface $storage
   *   The entity storage class.
   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
   *   The config factory.
   * @param \Drupal\Core\Messenger\MessengerInterface $messenger
   *   The messenger.
   */
  public function __construct(EntityTypeInterface $entity_type, EntityStorageInterface $storage, ConfigFactoryInterface $config_factory, MessengerInterface $messenger) {
    parent::__construct($entity_type, $storage);
    $this->configFactory = $config_factory;
    $this->messenger = $messenger;
  }
  
  /**
   * {@inheritdoc}
   */
  public static function createInstance(ContainerInterface $container, EntityTypeInterface $entity_type) {
    return new static($entity_type, $container->get('entity_type.manager')
      ->getStorage($entity_type->id()), $container->get('config.factory'), $container->get('messenger'));
  }
  
  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'filter_admin_overview';
  }
  
  /**
   * {@inheritdoc}
   */
  public function buildHeader() {
    $header['label'] = $this->t('Name');
    $header['roles'] = $this->t('Roles');
    $header['status'] = $this->t('Status');
    return $header + parent::buildHeader();
  }
  
  /**
   * {@inheritdoc}
   */
  public function buildRow(EntityInterface $entity) {
    // Check whether this is the fallback text format. This format is available
    // to all roles and cannot be disabled via the admin interface.
    $row['label'] = $entity->label();
    $row['roles'] = [];
    if ($entity->isFallbackFormat()) {
      $fallback_choice = $this->configFactory
        ->get('filter.settings')
        ->get('always_show_fallback_choice');
      if ($fallback_choice) {
        $row['roles']['#markup'] = $this->t('All roles may use this format');
      }
      else {
        $row['roles']['#markup'] = $this->t('This format is shown when no other formats are available');
      }
      // Emphasize the fallback role text since it is important to understand
      // how it works which configuring filter formats. Additionally, it is not
      // a list of roles unlike the other values in this column.
      $row['roles']['#prefix'] = '<em>';
      $row['roles']['#suffix'] = '</em>';
    }
    else {
      $row['roles'] = [
        '#theme' => 'item_list',
        '#items' => filter_get_roles_by_format($entity),
        '#empty' => $this->t('No roles may use this format'),
        '#context' => [
          'list_style' => 'comma-list',
        ],
      ];
    }
    if ($entity->status()) {
      $status = $this->t('Enabled');
    }
    else {
      $status = $this->t('Disabled');
    }
    $row['status']['#markup'] = $status;
    return $row + parent::buildRow($entity);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getDefaultOperations(EntityInterface $entity) {
    $operations = parent::getDefaultOperations($entity);
    if (isset($operations['edit'])) {
      $operations['edit']['title'] = $this->t('Configure');
    }
    // The fallback format may not be disabled.
    if ($entity->isFallbackFormat()) {
      unset($operations['disable']);
    }
    // Remove disable and edit operations for disabled formats.
    if (!$entity->status()) {
      if (isset($operations['disable'])) {
        unset($operations['disable']);
      }
      if (isset($operations['edit'])) {
        unset($operations['edit']);
      }
    }
    return $operations;
  }
  
  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {
    $form = parent::buildForm($form, $form_state);
    $form['actions']['submit']['#value'] = $this->t('Save');
    return $form;
  }
  
  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    parent::submitForm($form, $form_state);
    filter_formats_reset();
    $this->messenger
      ->addStatus($this->t('The text format ordering has been saved.'));
  }

}