eca-1.0.x-dev/modules/form/src/Plugin/Action/FormFieldGetDefaultValue.php

<?php

namespace Drupal\eca_form\Plugin\Action;

use Drupal\Core\Action\Attribute\Action;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\eca\Attribute\EcaAction;

/**
 * Get the default value of a form field.
 */
#[Action(
  id: 'eca_form_field_get_default_value',
  label: new TranslatableMarkup('Form field: get default value'),
  type: 'form',
)]
#[EcaAction(
  description: new TranslatableMarkup('Get the default value of a form field and store it as a token.'),
  version_introduced: '2.0.0',
)]
class FormFieldGetDefaultValue extends FormFieldActionBase {

  /**
   * {@inheritdoc}
   */
  protected bool $useFilters = FALSE;

  /**
   * {@inheritdoc}
   */
  protected bool $supportsMultiple = FALSE;

  /**
   * {@inheritdoc}
   */
  protected function doExecute(): void {
    $element = &$this->getTargetElement();
    $this->tokenService->addTokenData(
      $this->configuration['token_name'],
      $element['#default_value'] ?? NULL
    );
  }

  /**
   * {@inheritdoc}
   */
  public function defaultConfiguration(): array {
    return [
      'token_name' => '',
    ] + parent::defaultConfiguration();
  }

  /**
   * {@inheritdoc}
   */
  public function buildConfigurationForm(array $form, FormStateInterface $form_state): array {
    $form['token_name'] = [
      '#type' => 'textfield',
      '#title' => $this->t('Name of token'),
      '#description' => $this->t('Provide the name of a token where the value should be stored.'),
      '#default_value' => $this->configuration['token_name'],
      '#weight' => -10,
      '#eca_token_reference' => TRUE,
    ];
    return parent::buildConfigurationForm($form, $form_state);
  }

  /**
   * {@inheritdoc}
   */
  public function submitConfigurationForm(array &$form, FormStateInterface $form_state): void {
    $this->configuration['token_name'] = $form_state->getValue('token_name');
    parent::submitConfigurationForm($form, $form_state);
  }

}