UserBulkForm.php

<?php

/**
 * @file
 * Contains \Drupal\user\Plugin\views\field\UserBulkForm.
 */
namespace Drupal\user\Plugin\views\field;

use Drupal\Component\Annotation\PluginID;
use Drupal\Core\Entity\EntityManager;
use Drupal\system\Plugin\views\field\BulkFormBase;
use Drupal\user\UserInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Defines a user operations bulk form element.
 *
 * @PluginID("user_bulk_form")
 */
class UserBulkForm extends BulkFormBase {

  /**
   * {@inheritdoc}
   */
  public function __construct(array $configuration, $plugin_id, array $plugin_definition, EntityManager $manager) {
    parent::__construct($configuration, $plugin_id, $plugin_definition, $manager);

    // Filter the actions to only include those for the 'user' entity type.
    $this->actions = array_filter($this->actions, function ($action) {
      return $action
        ->getType() == 'user';
    });
  }

  /**
   * {@inheritdoc}
   *
   * Provide a more useful title to improve the accessibility.
   */
  public function views_form(&$form, &$form_state) {
    parent::views_form($form, $form_state);
    if (!empty($this->view->result)) {
      foreach ($this->view->result as $row_index => $result) {
        $account = $result->_entity;
        if ($account instanceof UserInterface) {
          $form[$this->options['id']][$row_index]['#title'] = t('Update the user %name', array(
            '%name' => $account
              ->label(),
          ));
        }
      }
    }
  }

  /**
   * {@inheritdoc}
   */
  public function views_form_validate(&$form, &$form_state) {
    $selected = array_filter($form_state['values'][$this->options['id']]);
    if (empty($selected)) {
      form_set_error('', t('No users selected.'));
    }
  }

}