public static async Task <TransitStop[]> GetTransitStopsForArea(LatLonRect area, CancellationToken cancellationToken)
{
if (area.Span.Latitude > 1 || area.Span.Longitude > 1)
{
return(null);
}
List <TransitStop> result = new List <TransitStop>();
var responseString = await SendRequest("stops-for-location", new Dictionary <string, string>() { ["lat"] = area.Center.Latitude.ToString(), ["lon"] = area.Center.Longitude.ToString(), ["latSpan"] = area.Span.Latitude.ToString(), ["lonSpan"] = area.Span.Longitude.ToString() }, false, cancellationToken);
if (cancellationToken.IsCancellationRequested)
{
return(null);
}
StringReader reader = new StringReader(responseString);
XDocument xDoc = XDocument.Load(reader);
//XElement el = (XElement)xDoc.Nodes().First(d => d.NodeType == XmlNodeType.Element && ((XElement)d).Name.LocalName == "response");
XElement el = xDoc.Element("response").Element("data");
XElement elList = el.Element("list");
foreach (XElement el1 in elList.Elements("stop"))
{
result.Add(ParseTransitStop(el1));
}
return(result.ToArray());
}
public override Task <RetrievedData <IEnumerable <TransitStop> > > GetTransitStopsForArea(LatLonRect area, CancellationToken cancellationToken)
{
var result = MemoryCache.QueryStops(stop => area.ContainsLatLon(stop.Position));
return(Task.FromResult(new RetrievedData <IEnumerable <TransitStop> >(result)));
}
public MapView(LatLonRect area)
{
Area = area;
}
public override async Task <RetrievedData <IEnumerable <TransitStop> > > GetTransitStopsForArea(LatLonRect area, CancellationToken cancellationToken)
{
try
{
if (area.Span.Latitude > 1 || area.Span.Longitude > 1)
{
return(null);
}
var responseString = await SendRequest("stops-for-location", new Dictionary <string, string>() { ["lat"] = area.Center.Latitude.ToString(), ["lon"] = area.Center.Longitude.ToString(), ["latSpan"] = area.Span.Latitude.ToString(), ["lonSpan"] = area.Span.Longitude.ToString() }, false, cancellationToken);
if (cancellationToken.IsCancellationRequested)
{
throw new OperationCanceledException();
}
StringReader reader = new StringReader(responseString);
XDocument xDoc = XDocument.Load(reader);
//XElement el = (XElement)xDoc.Nodes().First(d => d.NodeType == XmlNodeType.Element && ((XElement)d).Name.LocalName == "response");
XElement el = xDoc.Element("response").Element("data");
XElement elList = el.Element("list");
return(new RetrievedData <IEnumerable <TransitStop> >(ParseList(elList, "stop", ParseTransitStop)));
}
catch (OperationCanceledException)
{
return(new RetrievedData <IEnumerable <TransitStop> >());
}
catch (Exception ex)
{
return(new RetrievedData <IEnumerable <TransitStop> >(ex));
}
}
public override Task <RetrievedData <IEnumerable <TransitStop> > > GetTransitStopsForArea(LatLonRect area, CancellationToken cancellationToken)
{
return(Task.FromResult(new RetrievedData <IEnumerable <TransitStop> >(Stops.Where(stop => area.ContainsLatLon(stop.Position)))));
}
public abstract Task <RetrievedData <IEnumerable <TransitStop> > > GetTransitStopsForArea(LatLonRect area, CancellationToken cancellationToken);
public static RetrievedData <IEnumerable <TransitStop> > GetTransitStopsForArea(LatLonRect area, DataSourcePreference preference) => RunSync(() => GetTransitStopsForAreaAsync(area, preference, CancellationToken.None));
public static async Task <RetrievedData <IEnumerable <TransitStop> > > GetTransitStopsForAreaAsync(LatLonRect area, DataSourcePreference preference, CancellationToken cancellationToken)
{
IEnumerable <TransitStop> resultStops = null;
List <string> resultErrors = new List <string>();
List <Exception> resultExceptions = new List <Exception>();
foreach (var source in Sources)
{
if (cancellationToken.IsCancellationRequested)
{
throw new OperationCanceledException();
}
if (!source.IsQualified(preference))
{
continue;
}
if (source.CanGetTransitStopsForArea)
{
var sResult = await source.GetTransitStopsForArea(area, cancellationToken);
if (sResult.HasData)
{
if (resultStops == null)
{
resultStops = sResult.Data;
}
else
{
resultStops = resultStops.Union(sResult.Data);
}
}
if (sResult.ErrorMessage != null)
{
resultErrors.Add(sResult.ErrorMessage);
}
if (sResult.CaughtException != null)
{
resultExceptions.Add(sResult.CaughtException);
}
}
}
if (resultStops == null)
{
resultStops = new TransitStop[] { }
}
;
return(new RetrievedData <IEnumerable <TransitStop> >(resultStops, resultErrors.Count == 0 ? null : resultErrors.Aggregate("", (acc, err) => (acc == "" ? "" : ", ") + err), resultExceptions.Count == 0 ? null : new AggregateException(resultExceptions)));
}
