public function OrderFixedAmountOff::apply in Commerce Core 8.2

Applies the offer to the given entity.

Parameters

\Drupal\Core\Entity\EntityInterface $entity: The entity.

\Drupal\commerce_promotion\Entity\PromotionInterface $promotion: THe parent promotion.

Overrides PromotionOfferInterface::apply

File

modules/promotion/src/Plugin/Commerce/PromotionOffer/OrderFixedAmountOff.php, line 27

Class

OrderFixedAmountOff

Provides the fixed amount off offer for orders.

Namespace

Drupal\commerce_promotion\Plugin\Commerce\PromotionOffer

Code

public function apply(EntityInterface $entity, PromotionInterface $promotion) {
  $this
    ->assertEntity($entity);

  /** @var \Drupal\commerce_order\Entity\OrderInterface $order */
  $order = $entity;
  $subtotal_price = $order
    ->getSubTotalPrice();
  $amount = $this
    ->getAmount();
  if ($subtotal_price
    ->getCurrencyCode() != $amount
    ->getCurrencyCode()) {
    return;
  }
  $total_price = $order
    ->getTotalPrice();

  // The promotion amount can't be larger than the total, to avoid
  // potentially having a negative order total.
  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;
  }

  // Split the amount between order items.
  $amounts = $this->splitter
    ->split($order, $amount);
  foreach ($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'),
        'source_id' => $promotion
          ->id(),
      ]));
    }
  }
}