public function perform(PromotionSubjectInterface $subject)
{
if ($this->isValid()) {
$discountedTotal = $subject->getOrderTotal() - $this->amount;
if ($discountedTotal < 0) {
// Modify amount to make the order total non-negative and stop at 0.
$this->amount -= abs($discountedTotal);
}
$subject->addOrderDiscount($this->amount);
}
}
public function getValidationResult(PromotionSubjectInterface $subject)
{
return version_compare($subject->getOrderTotal(), $this->value, $this->operator);
}
