commerce-8.x-2.8/modules/product/src/Plugin/Commerce/Condition/ProductTypeTrait.php

<?php

namespace Drupal\commerce_product\Plugin\Commerce\Condition;

use Drupal\Core\Form\FormStateInterface;

/**
 * Provides common configuration for the product type conditions.
 */
trait ProductTypeTrait {

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

  /**
   * {@inheritdoc}
   */
  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
    $form = parent::buildConfigurationForm($form, $form_state);

    $form['product_types'] = [
      '#type' => 'commerce_entity_select',
      '#title' => $this->t('Product types'),
      '#default_value' => $this->configuration['product_types'],
      '#target_type' => 'commerce_product_type',
      '#hide_single_entity' => FALSE,
      '#autocomplete_threshold' => 10,
      '#multiple' => TRUE,
      '#required' => TRUE,
    ];

    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
    parent::submitConfigurationForm($form, $form_state);

    $values = $form_state->getValue($form['#parents']);
    $this->configuration['product_types'] = $values['product_types'];
  }

}