Issue #3306414 by mandclu: Add argument handler to support tokens

# Schema for the Smart Date views default arguments.

views.argument_default.date_token:

  type: mapping

  label: 'Date Token'

  mapping:

    token:

      type: string

      label: 'Token value'

<?php

namespace Drupal\smart_date\Plugin\views\argument_default;

use Drupal\Core\Cache\Cache;

use Drupal\Core\Cache\CacheableDependencyInterface;

use Drupal\Core\Form\FormStateInterface;

use Drupal\views\Plugin\views\argument_default\ArgumentDefaultPluginBase;

/**

 * The date token argument default handler.

 *

 * @ingroup views_argument_default_plugins

 *

 * @ViewsArgumentDefault(

 *   id = "date_token",

 *   title = @Translation("Date Token")

 * )

 */

class DateToken extends ArgumentDefaultPluginBase implements CacheableDependencyInterface {

  /**

   * {@inheritdoc}

   */

  protected function defineOptions() {

    $options = parent::defineOptions();

    $options['token'] = ['default' => ''];

    return $options;

  }

  /**

   * {@inheritdoc}

   */

  public function buildOptionsForm(&$form, FormStateInterface $form_state) {

    parent::buildOptionsForm($form, $form_state);

    $form['token'] = [

      '#type' => 'textfield',

      '#title' => $this->t('Token'),

      '#default_value' => $this->options['token'],

    ];

  }

  /**

   * {@inheritdoc}

   */

  public function getArgument() {

    $token_service = \Drupal::token();

    $value = $token_service->replace($this->options['token']);

    return $value;

  }

  /**

   * {@inheritdoc}

   */

  public function getCacheMaxAge() {

    return Cache::PERMANENT;

  }

  /**

   * {@inheritdoc}

   */

  public function getCacheContexts() {

    return [];

  }

}