commerce_amws-8.x-1.x-dev/modules/order/src/Plugin/EntitySync/FieldTransformer/OrderItemUnitPrice.php

<?php

namespace Drupal\commerce_amws_order\Plugin\EntitySync\FieldTransformer;

use Drupal\commerce_amws\Utilities;
use Drupal\entity_sync\FieldTransformer\PluginBase;
use Drupal\Core\Entity\ContentEntityInterface;

/**
 * Transformer that sets the unit price for order items.
 *
 * @EntitySyncFieldTransformer(
 *   id = "commerce_amws_order_item_unit_price"
 * )
 */
class OrderItemUnitPrice extends PluginBase {

  /**
   * {@inheritdoc}
   */
  public function defaultConfiguration() {
    return [
      // Using the unit price setter method will trigger recalculating the order
      // item's total price as well.
      'setter' => 'setUnitPrice',
    ] + parent::defaultConfiguration();
  }

  /**
   * {@inheritdoc}
   */
  public function transformImportedValue(
    $original_value,
    \stdClass $remote_entity,
    ContentEntityInterface $local_entity,
    array $field_info,
    array $context
  ) {
    $total_price = Utilities::amwsPriceToDrupalPrice($original_value);

    // Subtract any promotion discount as well.
    // We might develop a feature of connecting Drupal promotions with Amazon
    // MWS promotions, but that needs a bit more thinking. For now, don't create
    // an adjustment.
    if (!empty($remote_entity->PromotionDiscount)) {
      $total_price = $total_price->subtract(
        Utilities::amwsPriceToDrupalPrice($remote_entity->PromotionDiscount)
      );
    }

    return $total_price->divide($remote_entity->QuantityOrdered);
  }

}