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);
}
}
private Banknote GetBanknote(string banknote)
{
var bankNote = new Banknote
{
Currency = ParseCurrency(banknote),
Nominal = ParseValue(banknote)
};
return(bankNote);
}
public virtual bool Validate(Banknote banknote)
{
if (!IsAvailable(banknote))
{
return(_nextHandler != null && _nextHandler.Validate(banknote));
}
var remainder = banknote.Nominal % Value;
if (remainder == 0)
{
return(true);
}
var transformed = new Banknote
{
Currency = banknote.Currency,
Nominal = remainder
};
return(_nextHandler != null && _nextHandler.Validate(transformed));
}
protected bool IsAvailable(Banknote banknote)
{
return(AcceptableCurrencies.Contains(banknote.Currency));
}
