public ActionResult RangeRoot(ExchangeRangeViewModel exchangeRange)
{
Trace.WriteLine("RangeRoot for exchangeRange.");
if (ModelState.IsValid)
{
Trace.WriteLine("Model is valid. Be ready to request the range.");
return(RedirectToAction("Range", exchangeRange.ToRouteValues()));
}
Trace.WriteLine("Model is not valid.");
return(View(exchangeRange));
}
public ActionResult RangeRoot()
{
Trace.WriteLine("RANGE W/O arguments.");
var endDate = DateTime.Now;
var startDate = DateTime.Now.Subtract(TimeSpan.FromDays(14));
var currencyCode = "RUB";
var model = new ExchangeRangeViewModel {
StartDate = startDate, EndDate = endDate, TargetCurrencyCode = currencyCode
};
return(View(model));
}
/*
* Returns rates for a given currencyCode from startDate to endDate inclusive.
* GET: Exchanges/Range/2014-02-25/2014-02-27/RUB
**/
public ActionResult Range(ExchangeRangeViewModel exchangeRange)
{
Trace.WriteLine("RANGE for " + exchangeRange + ".");
var startDate = exchangeRange.StartDate;
var endDate = exchangeRange.EndDate;
var targetCurrencyCode = exchangeRange.TargetCurrencyCode;
var maxNumberOfDaysInRange = 62;
Trace.WriteLine(
String.Format(
"Range requested for: {0}-{1} {2}",
startDate, endDate, targetCurrencyCode
)
);
var numberOfDaysInRange = (endDate - startDate).Days + 1; // Inclusive.
if (!(0 < numberOfDaysInRange && numberOfDaysInRange <= maxNumberOfDaysInRange))
{
return(new HttpStatusCodeResult(HttpStatusCode.RequestedRangeNotSatisfiable,
String.Format("Number of days in a range must be positive and less than {0}.", maxNumberOfDaysInRange)));
}
IEnumerable <Exchange> exchanges;
try
{
exchanges = exchangeContext.ExchangeRepository.GetRange(startDate, endDate, targetCurrencyCode);
Trace.WriteLine("Retrieved range of responses without errors.");
}
catch (ExchangeResource.BaseException resEx)
{
Trace.WriteLine("ExchangeResource exception caught with " + resEx.GetFailedDates().Count() + " failed dates. Specifying type...");
var failedDatesString = String.Join(", ", resEx.GetFailedDates().Select(d => d.ToString("yyyy-MM-dd")));
var header = String.Format(
"Couldn't supply information about {0} on these dates: {1}. Reason:<br/>",
targetCurrencyCode,
failedDatesString
);
header = header.Replace("\r", "").Replace("\n", "<br/>"); // Linebreaks are not allowed in http headers.
try {
throw;
}
catch (ExchangeResource.TryLaterException)
{
return(new HttpStatusCodeResult(
HttpStatusCode.ServiceUnavailable,
header + "Temporary fail. The application has temporary difficulties with specified currency and dates. Try a bit later."
));
}
catch (ExchangeResource.TryRequestingOtherDatesOrCurrency requestEx)
{
return(new HttpStatusCodeResult(
HttpStatusCode.NotFound,
header + "The application has no information about this currency on dates requested."
+ "<br/>" + requestEx.Message
));
}
catch (ExchangeResource.BaseException)
{
Trace.WriteLine("Some base resource exception caught. Header for response: <" + header + ">");
return(new HttpStatusCodeResult(
HttpStatusCode.ServiceUnavailable,
header + "The application can't complete your request for specified currency and dates due to some internal conflicts."
));
}
}
Trace.WriteLine("Now we have all exchanges and ready to render a view.");
return(View(exchanges));
}
