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 load() {
        // Only list enabled filters.
        return array_filter(parent::load(), function ($entity) {
            return $entity->status();
        });
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildHeader() {
        $header['label'] = $this->t('Name');
        $header['roles'] = $this->t('Roles');
        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',
                ],
            ];
        }
        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']);
        }
        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.'));
    }

}