public virtual IEnumerable <int> CashOut(Banknote banknote)
{
if (!IsAvailable(banknote))
{
foreach (var banknoteObject in _nextHandler.CashOut(banknote))
{
yield return(banknoteObject);
}
yield break;
}
var nominal = banknote.Nominal;
var quotient = nominal / Value;
var remainder = nominal % Value;
foreach (var banknoteObject in Enumerable.Repeat(Value, quotient))
{
yield return(banknoteObject);
}
if (remainder == 0)
{
yield break;
}
foreach (var banknoteObject in _nextHandler.CashOut(new Banknote
{
Currency = banknote.Currency,
Nominal = remainder
}))
{
yield return(banknoteObject);
}
}
public IEnumerable <Banknote> CashOut(string banknote)
{
var banknoteObject = GetBanknote(banknote);
if (!_handler.Validate(banknoteObject))
{
throw new ArgumentException();
}
var nominals = _handler.CashOut(banknoteObject);
return(nominals.Select(x => new Banknote
{
Currency = banknoteObject.Currency,
Nominal = x
}));
}
