protected function BuyXGetY::sliceQuantities in Commerce Core 8.2

Takes a slice from the given quantity list.

For example, ['1' => '10', '2' => '5'] sliced for total quantity '11' will produce a ['1' => '10', '2' => '1'] slice, leaving ['2' => '4'] in the original list.

Parameters

array $quantities: The quantity list. Modified by reference.

string $total_quantity: The total quantity of the new slice.

Return value

array The quantity list slice.

2 calls to BuyXGetY::sliceQuantities()

BuyXGetY::apply in modules/promotion/src/Plugin/Commerce/PromotionOffer/BuyXGetY.php

Applies the offer to the given entity.

BuyXGetY::calculateExpectedGetQuantity in modules/promotion/src/Plugin/Commerce/PromotionOffer/BuyXGetY.php

Calculates the expected get quantity.

File

modules/promotion/src/Plugin/Commerce/PromotionOffer/BuyXGetY.php, line 690

Class

BuyXGetY

Provides the "Buy X Get Y" offer for orders.

Namespace

Drupal\commerce_promotion\Plugin\Commerce\PromotionOffer

Code

protected function sliceQuantities(array &$quantities, $total_quantity) {
  $remaining_quantity = $total_quantity;
  $slice = [];
  foreach ($quantities as $order_item_id => $quantity) {
    if ($quantity <= $remaining_quantity) {
      $remaining_quantity = Calculator::subtract($remaining_quantity, $quantity);
      $slice[$order_item_id] = $quantity;
      unset($quantities[$order_item_id]);
      if ($remaining_quantity === '0') {
        break;
      }
    }
    else {
      $slice[$order_item_id] = $remaining_quantity;
      $quantities[$order_item_id] = Calculator::subtract($quantity, $remaining_quantity);
      break;
    }
  }
  return $slice;
}