private PurchaseInfo(MoneyAmount grossAmount, MoneyAmount netAmount, MoneyAmount vatAmount, VatRate vatRate)
{
GrossAmount = grossAmount;
NetAmount = netAmount;
VatAmount = vatAmount;
VatRate = vatRate;
}
private static void ThrowIfInputNull(VatRate vatRate, MoneyAmount amount)
{
if (vatRate == null)
{
throw new ArgumentException(nameof(vatRate));
}
if (amount == null)
{
throw new ArgumentException(nameof(amount));
}
}
public static PurchaseInfo CreateWithVatAmount(VatRate vatRate, MoneyAmount vatAmount)
{
ThrowIfInputNull(vatRate, vatAmount);
decimal netAmount = vatAmount.Value / vatRate.Value;
decimal grossAmount = netAmount + vatAmount.Value;
var netAmountResult = MoneyAmount.Create(netAmount);
var grossAmountResult = MoneyAmount.Create(grossAmount);
if (netAmountResult.IsFailure || grossAmountResult.IsFailure)
{
throw new ArgumentException();
}
return(new PurchaseInfo(grossAmountResult.Value, netAmountResult.Value, vatAmount, vatRate));
}