/**
* Create vouchers on order payment success event
*/
public function onPayment()
{
parent::onPayment();
if ($this->Coupons()->Count() < $this->Quantity) {
$remaining = $this->Quantity - $this->Coupons()->Count();
for ($i = 0; $i < $remaining; $i++) {
if ($coupon = $this->createCoupon()) {
$this->sendVoucher($coupon);
}
}
}
}
