public async Task <ConvertedCurrencyValue> ConvertCurrencyAsync(PriceConversionRequest priceConversionRequest)
{
if (priceConversionRequest == null)
{
throw new ArgumentNullException("Price Conversion request is null");
}
await _priceConversionRequestValidator.ValidateAndThrowAsync(priceConversionRequest);
var exchangeRateApiUrlSection = _configuration.GetSection("ExchangeRateApiUrl");
if (string.IsNullOrEmpty(exchangeRateApiUrlSection?.Value))
{
var error = "Exchange rates API not configured";
_logger.LogError(error);
throw new Exception(error);
}
var exchangeRateApiUrl = $"{exchangeRateApiUrlSection.Value}/{priceConversionRequest.SourceCurrency}.json";
var cancellationToken = new CancellationTokenSource().Token;
var response = await _clientWrapper.GetAsync <ExchangeRatesResponse>(exchangeRateApiUrl, cancellationToken).ConfigureAwait(false);
if (!response.Success || response.Data?.Rates == null)
{
return(null);
}
var rates = response.Data.Rates;
double convertedPrice;
switch (priceConversionRequest.TargetCurrency.ToUpper())
{
case "USD":
convertedPrice = priceConversionRequest.Price * rates.USD;
break;
case "EUR":
convertedPrice = priceConversionRequest.Price * rates.EUR;
break;
case "GBP":
convertedPrice = priceConversionRequest.Price * rates.GBP;
break;
default: return(null);
}
if (DateTime.TryParse(response.Data.Date, out var lastUpdated))
{
var time = new TimeSpan(response.Data.TimeLastUpdated);
lastUpdated = lastUpdated.Add(time);
}
return(new ConvertedCurrencyValue
{
NewPrice = convertedPrice,
ConvertedFromCurrency = priceConversionRequest.SourceCurrency,
ConvertedToCurrency = priceConversionRequest.TargetCurrency,
LastUpdated = lastUpdated
});
}
public async Task <ActionResult <ConvertedCurrencyValue> > Get(PriceConversionRequest priceConversionRequest)
{
try
{
var result = await _priceConversionService.ConvertCurrencyAsync(priceConversionRequest)
.ConfigureAwait(false);
if (result == null)
{
return(NotFound("Currency Not Supported"));
}
return(Ok(result));
}
catch (Exception)
{
return(StatusCode(500, "Server Error"));
}
}