/**
* @param \Magento\SalesRule\Model\Rule $rule
* @param \Magento\Sales\Model\Quote\Item\AbstractItem $item
* @param float $qty
* @return \Magento\SalesRule\Model\Rule\Action\Discount\Data
*/
public function calculate($rule, $item, $qty)
{
/** @var \Magento\SalesRule\Model\Rule\Action\Discount\Data $discountData */
$discountData = $this->discountFactory->create();
$itemPrice = $this->validator->getItemPrice($item);
$baseItemPrice = $this->validator->getItemBasePrice($item);
$itemOriginalPrice = $this->validator->getItemOriginalPrice($item);
$baseItemOriginalPrice = $this->validator->getItemBaseOriginalPrice($item);
$x = $rule->getDiscountStep();
$y = $rule->getDiscountAmount();
if (!$x || $y > $x) {
return $discountData;
}
$buyAndDiscountQty = $x + $y;
$fullRuleQtyPeriod = floor($qty / $buyAndDiscountQty);
$freeQty = $qty - $fullRuleQtyPeriod * $buyAndDiscountQty;
$discountQty = $fullRuleQtyPeriod * $y;
if ($freeQty > $x) {
$discountQty += $freeQty - $x;
}
$discountData->setAmount($discountQty * $itemPrice);
$discountData->setBaseAmount($discountQty * $baseItemPrice);
$discountData->setOriginalAmount($discountQty * $itemOriginalPrice);
$discountData->setBaseOriginalAmount($discountQty * $baseItemOriginalPrice);
return $discountData;
}
/**
* @param float $qty
* @param \Magento\SalesRule\Model\Rule $rule
* @return float
*/
public function fixQuantity($qty, $rule)
{
$step = $rule->getDiscountStep();
if ($step) {
$qty = floor($qty / $step) * $step;
}
return $qty;
}
