private static TripDetails ParseTripDetails(XElement trip)
{
TripDetails tripDetails = new TripDetails();
tripDetails.tripId = SafeGetValue(trip.Element("tripId"));
XElement statusElement;
if (trip.Element("tripStatus") != null)
{
// ArrivalsForStop returns the status element as 'tripStatus'
statusElement = trip.Element("tripStatus");
}
else if (trip.Element("status") != null)
{
// The TripDetails query returns 'status'
statusElement = trip.Element("status");
}
else
{
// No status available, stop parsing here
return tripDetails;
}
// TODO: Log a warning for when the serviceDate is invalid. This might be a OBA bug, but I don't
// have the debugging info to prove it
string serviceDate = SafeGetValue(statusElement.Element("serviceDate"));
if (string.IsNullOrEmpty(serviceDate) == false)
{
long serviceDateLong;
bool success = long.TryParse(serviceDate, out serviceDateLong);
if (success)
{
tripDetails.serviceDate = UnixTimeToDateTime(serviceDateLong);
if (string.IsNullOrEmpty(SafeGetValue(statusElement.Element("predicted"))) == false
&& bool.Parse(SafeGetValue(statusElement.Element("predicted"))) == true)
{
tripDetails.scheduleDeviationInSec = int.Parse(SafeGetValue(statusElement.Element("scheduleDeviation")));
tripDetails.closestStopId = SafeGetValue(statusElement.Element("closestStop"));
tripDetails.closestStopTimeOffset = int.Parse(SafeGetValue(statusElement.Element("closestStopTimeOffset")));
if (statusElement.Element("position") != null)
{
tripDetails.location = new GeoCoordinate(
double.Parse(SafeGetValue(statusElement.Element("position").Element("lat")), NumberFormatInfo.InvariantInfo),
double.Parse(SafeGetValue(statusElement.Element("position").Element("lon")), NumberFormatInfo.InvariantInfo)
);
}
}
}
}
return tripDetails;
}
public override void ParseResults(XDocument xmlDoc, Exception error)
{
TripDetails tripDetail = new TripDetails();
if (xmlDoc == null || error != null)
{
callback(tripDetail, error);
}
else
{
try
{
tripDetail =
(from trip in xmlDoc.Descendants("entry")
select ParseTripDetails(trip)).First();
}
catch (WebserviceResponseException ex)
{
error = ex;
}
catch (Exception ex)
{
error = new WebserviceParsingException(requestUrl, xmlDoc.ToString(), ex);
}
}
Debug.Assert(error == null);
callback(tripDetail, error);
}