public CurrencyRate(CurrencyCode code, double rate)
{
if (rate < 0)
{
throw new ArgumentException("rate can't be less than zero!", nameof(rate));
}
Code = code;
Rate = rate;
}
public double Exchange(double sourceAmount, CurrencyCode sourceCurrencyCode, CurrencyCode destCurrencyCode)
{
CurrencyRate sr = this[sourceCurrencyCode];
CurrencyRate dr = this[destCurrencyCode];
double relativeRate = dr.Rate / sr.Rate;
return(sourceAmount * relativeRate);
}
public CurrencyRate this[CurrencyCode code]
{
get
{
if (!_data.TryGetValue(code, out var result))
{
throw new ArgumentException("Unknown Currency:" + code, nameof(code));
}
return(result);
}
}
public CurrencyTimeSeries(CurrencyCode currencyCode, IEnumerable<double> data)
{
CurrencyCode = currencyCode;
_data = data.ToArray();
}
public CurrencyTimeSeries this[CurrencyCode code] => _data[code];