public double GetExchangeRate(string from, string to, DateTime date, double amount = 1)
{
if (string.IsNullOrWhiteSpace(from) || string.IsNullOrWhiteSpace(to))
{
return(0);
}
if (from.Equals("EUR", StringComparison.InvariantCultureIgnoreCase) && to.Equals("EUR", StringComparison.InvariantCultureIgnoreCase))
{
return(amount);
}
try
{
var toRate = _currenciesRepository.GetCurrencyRateInEuro(to, date);
var fromRate = _currenciesRepository.GetCurrencyRateInEuro(from, date);
if (from.Equals("EUR", StringComparison.InvariantCultureIgnoreCase) && toRate.HasValue)
{
return(amount * toRate.Value);
}
if (to.Equals("EUR", StringComparison.InvariantCultureIgnoreCase) && fromRate.HasValue)
{
return(amount / fromRate.Value);
}
if (toRate.HasValue && fromRate.HasValue && fromRate.Value > 0)
{
return(amount * toRate.Value / fromRate.Value);
}
}
catch { return(0); }
return(0);
}
