public ActionResult <decimal> Exchange([FromQuery, Required] string from,
[FromQuery, Required] string to,
[FromQuery, Required] decimal amount,
[FromQuery] string date)
{
if (!ModelState.IsValid)
{
return(BadRequest(ModelState));
}
try
{
decimal exchangeRate;
if (date != null)
{
DateTime parsedDate = ParseISODate(date);
if (parsedDate > DateTime.Now)
{
return(DateAfterTodayError("date"));
}
exchangeRate = Fixer.GetExchangeRate(from, to, parsedDate);
}
else
{
exchangeRate = Fixer.GetExchangeRate(from, to);
}
return(Ok(amount * exchangeRate));
}
catch (FormatException)
{
return(DateFormatError("date"));
}
catch (FixerException ex)
{
if (ex.ErrorCode == FixerErrorCode.InvalidCurrency)
{
return(BadRequest(ex.Message));
}
logger.LogError(ex, "{Controller}.Exchange({From}, {To}, {Amount}, {Date})", nameof(ExchangeRatesController), from, to, amount, date);
return(StatusCode(502, "Something went wrong."));
}
}
private static void Main(string[] args)
{
bool retry = true;
while (retry)
{
string sourceCurrency = PromptForCode("Source currency code: ");
string targetCurrency = PromptForCode("Target currency code: ");
decimal amount = PromptForAmount("Currency amount: ");
try
{
decimal exchangeRate;
Console.WriteLine();
if (QuestionPrompt("Would you like to check for a particular date? "))
{
exchangeRate = Fixer.GetExchangeRate(sourceCurrency, targetCurrency, PromptForDate("Date: "));
}
else
{
exchangeRate = Fixer.GetExchangeRate(sourceCurrency, targetCurrency);
}
Console.WriteLine("\n" + amount + " " + sourceCurrency + " = " + (amount * exchangeRate) + " " + targetCurrency);
retry = false;
}
catch (FixerException ex)
{
Console.WriteLine("ERROR: " + ex.Message + "\n");
retry = QuestionPrompt("Would you like to try again? ");
}
catch (WebException ex)
{
Console.WriteLine("ERROR: Internet connection problem. (" + ex.Message + ")\n");
retry = QuestionPrompt("Would you like to try again? ");
}
}
}
