public function willRefundCharge(PhabricatorUser $actor, PhortunePaymentProvider $provider, PhortuneCharge $charge, PhortuneCurrency $amount)
{
if (!$amount->isPositive()) {
throw new Exception(pht('Trying to refund non-positive amount of money!'));
}
if ($amount->isGreaterThan($charge->getAmountRefundableAsCurrency())) {
throw new Exception(pht('Trying to refund more money than remaining on charge!'));
}
if ($charge->getRefundedChargePHID()) {
throw new Exception(pht('Trying to refund a refund!'));
}
if ($charge->getStatus() !== PhortuneCharge::STATUS_CHARGED && $charge->getStatus() !== PhortuneCharge::STATUS_HOLD) {
throw new Exception(pht('Trying to refund an uncharged charge!'));
}
$refund_charge = PhortuneCharge::initializeNewCharge()->setAccountPHID($this->getAccount()->getPHID())->setCartPHID($this->getPHID())->setAuthorPHID($actor->getPHID())->setMerchantPHID($this->getMerchant()->getPHID())->setProviderPHID($provider->getProviderConfig()->getPHID())->setPaymentMethodPHID($charge->getPaymentMethodPHID())->setRefundedChargePHID($charge->getPHID())->setAmountAsCurrency($amount->negate());
$charge->openTransaction();
$charge->beginReadLocking();
$copy = clone $charge;
$copy->reload();
if ($copy->getRefundingPHID() !== null) {
throw new Exception(pht('Trying to refund a charge which is already refunding!'));
}
$refund_charge->save();
$charge->setRefundingPHID($refund_charge->getPHID());
$charge->save();
$charge->endReadLocking();
$charge->saveTransaction();
return $refund_charge;
}