OrderPercentageOff.php in Commerce Core 8.2

Namespace

Drupal\commerce_promotion\Plugin\Commerce\PromotionOffer

File

modules/promotion/src/Plugin/Commerce/PromotionOffer/OrderPercentageOff.php

<?php

namespace Drupal\commerce_promotion\Plugin\Commerce\PromotionOffer;

use Drupal\commerce_order\Adjustment;
use Drupal\commerce_promotion\Entity\PromotionInterface;
use Drupal\Core\Entity\EntityInterface;

/**
 * Provides the percentage off offer for orders.
 *
 * The discount is split between order items, to simplify VAT taxes and refunds.
 *
 * @CommercePromotionOffer(
 *   id = "order_percentage_off",
 *   label = @Translation("Percentage off the order subtotal"),
 *   entity_type = "commerce_order",
 * )
 */
class OrderPercentageOff extends OrderPromotionOfferBase {
  use PercentageOffTrait;

  /**
   * {@inheritdoc}
   */
  public function apply(EntityInterface $entity, PromotionInterface $promotion) {
    $this
      ->assertEntity($entity);

    /** @var \Drupal\commerce_order\Entity\OrderInterface $order */
    $order = $entity;
    $percentage = $this
      ->getPercentage();

    // Calculate the order-level discount and split it between order items.
    $amount = $order
      ->getSubtotalPrice()
      ->multiply($percentage);
    $amount = $this->rounder
      ->round($amount);
    $total_price = $order
      ->getTotalPrice();
    if ($total_price && $amount
      ->greaterThan($total_price)) {
      $amount = $total_price;
    }

    // Skip applying the promotion if there's no amount to discount.
    if ($amount
      ->isZero()) {
      return;
    }
    $amounts = $this->splitter
      ->split($order, $amount, $percentage);
    foreach ($order
      ->getItems() as $order_item) {
      if (isset($amounts[$order_item
        ->id()])) {
        $order_item
          ->addAdjustment(new Adjustment([
          'type' => 'promotion',
          'label' => $promotion
            ->getDisplayName() ?: $this
            ->t('Discount'),
          'amount' => $amounts[$order_item
            ->id()]
            ->multiply('-1'),
          'percentage' => $percentage,
          'source_id' => $promotion
            ->id(),
        ]));
      }
    }
  }

}

Classes

Name	Description
OrderPercentageOff	Provides the percentage off offer for orders.