class UserMultipleCancelConfirm

class UserMultipleCancelConfirm extends ConfirmFormBase {
    
    /**
     * The temp store factory.
     *
     * @var \Drupal\Core\TempStore\PrivateTempStoreFactory
     */
    protected $tempStoreFactory;
    
    /**
     * The user storage.
     *
     * @var \Drupal\user\UserStorageInterface
     */
    protected $userStorage;
    
    /**
     * The entity type manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * Constructs a new UserMultipleCancelConfirm.
     *
     * @param \Drupal\Core\TempStore\PrivateTempStoreFactory $temp_store_factory
     *   The temp store factory.
     * @param \Drupal\user\UserStorageInterface $user_storage
     *   The user storage.
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity type manager.
     */
    public function __construct(PrivateTempStoreFactory $temp_store_factory, UserStorageInterface $user_storage, EntityTypeManagerInterface $entity_type_manager) {
        $this->tempStoreFactory = $temp_store_factory;
        $this->userStorage = $user_storage;
        $this->entityTypeManager = $entity_type_manager;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('tempstore.private'), $container->get('entity_type.manager')
            ->getStorage('user'), $container->get('entity_type.manager'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function getFormId() {
        return 'user_multiple_cancel_confirm';
    }
    
    /**
     * {@inheritdoc}
     */
    public function getQuestion() {
        return $this->t('Are you sure you want to cancel these user accounts?');
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCancelUrl() {
        return new Url('entity.user.collection');
    }
    
    /**
     * {@inheritdoc}
     */
    public function getConfirmText() {
        return $this->t('Confirm');
    }
    
    /**
     * {@inheritdoc}
     */
    public function getDescription() {
        return '';
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildForm(array $form, FormStateInterface $form_state) {
        // Retrieve the accounts to be canceled from the temp store.
        
        /** @var \Drupal\user\Entity\User[] $accounts */
        $accounts = $this->tempStoreFactory
            ->get('user_user_operations_cancel')
            ->get($this->currentUser()
            ->id());
        if (!$accounts) {
            return $this->redirect('entity.user.collection');
        }
        $root = NULL;
        $names = [];
        $form['accounts'] = [
            '#tree' => TRUE,
        ];
        foreach ($accounts as $account) {
            $uid = $account->id();
            $names[$uid] = $account->label();
            // Prevent user 1 from being canceled.
            if ($uid <= 1) {
                $root = intval($uid) === 1 ? $account : $root;
                continue;
            }
            $form['accounts'][$uid] = [
                '#type' => 'hidden',
                '#value' => $uid,
            ];
        }
        $form['account']['names'] = [
            '#theme' => 'item_list',
            '#items' => $names,
        ];
        // Output a notice that user 1 cannot be canceled.
        if (isset($root)) {
            $redirect = count($accounts) == 1;
            $message = $this->t('The user account %name cannot be canceled.', [
                '%name' => $root->label(),
            ]);
            $this->messenger()
                ->addMessage($message, $redirect ? MessengerInterface::TYPE_ERROR : MessengerInterface::TYPE_WARNING);
            // If only user 1 was selected, redirect to the overview.
            if ($redirect) {
                return $this->redirect('entity.user.collection');
            }
        }
        $form['operation'] = [
            '#type' => 'hidden',
            '#value' => 'cancel',
        ];
        // Display account cancellation method selection, if allowed.
        $user = $this->currentUser();
        $selectCancel = $user->hasPermission('administer users') || $user->hasPermission('select account cancellation method');
        $form['user_cancel_method'] = [
            '#type' => 'radios',
            '#title' => $this->t('Cancellation method'),
            '#access' => $selectCancel,
        ];
        $form['user_cancel_method'] += user_cancel_methods();
        if (!$selectCancel) {
            // Display an item to inform the user of the setting.
            $default_method = $form['user_cancel_method']['#default_value'];
            $form['user_cancel_method_show'] = [
                '#type' => 'item',
                '#title' => $this->t('When cancelling these accounts'),
                '#plain_text' => $form['user_cancel_method']['#options'][$default_method],
            ];
        }
        // Allow to send the account cancellation confirmation mail.
        $form['user_cancel_confirm'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Require email confirmation'),
            '#default_value' => FALSE,
            '#description' => $this->t('When enabled, the user must confirm the account cancellation via email.'),
        ];
        // Also allow to send account canceled notification mail, if enabled.
        $form['user_cancel_notify'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Notify user when account is canceled'),
            '#default_value' => FALSE,
            '#access' => $this->config('user.settings')
                ->get('notify.status_canceled'),
            '#description' => $this->t('When enabled, the user will receive an email notification after the account has been canceled.'),
        ];
        $form = parent::buildForm($form, $form_state);
        return $form;
    }
    
    /**
     * {@inheritdoc}
     */
    public function submitForm(array &$form, FormStateInterface $form_state) {
        $current_user_id = $this->currentUser()
            ->id();
        // Clear out the accounts from the temp store.
        $this->tempStoreFactory
            ->get('user_user_operations_cancel')
            ->delete($current_user_id);
        if ($form_state->getValue('confirm')) {
            foreach ($form_state->getValue('accounts') as $uid => $value) {
                // Prevent programmatic form submissions from cancelling user 1.
                if ($uid <= 1) {
                    continue;
                }
                // Prevent user administrators from deleting themselves without confirmation.
                if ($uid == $current_user_id) {
                    $admin_form_mock = [];
                    $admin_form_state = $form_state;
                    $admin_form_state->unsetValue('user_cancel_confirm');
                    // The $user global is not a complete user entity, so load the full
                    // entity.
                    $account = $this->userStorage
                        ->load($uid);
                    $admin_form = $this->entityTypeManager
                        ->getFormObject('user', 'cancel');
                    $admin_form->setEntity($account);
                    // Calling this directly required to init form object with $account.
                    $admin_form->buildForm($admin_form_mock, $admin_form_state);
                    $admin_form->submitForm($admin_form_mock, $admin_form_state);
                }
                else {
                    user_cancel($form_state->getValues(), $uid, $form_state->getValue('user_cancel_method'));
                }
            }
        }
        $form_state->setRedirect('entity.user.collection');
    }

}