/// <summary>
/// Loads the data.
/// </summary>
/// <param name="destination">The destination.</param>
public void LoadData(string destination)
{
this.IsDataLoading = true;
var observable = this._houstonTranstarService.GetTravelTime(destination);
observable
.ObserveOnDispatcher()
.Subscribe(tt =>
{
if (tt != null)
{
this.TravelTime = tt;
}
}, ex =>
{
this._dataRetrievalErrorInteractionRequest.Raise(new InteractionReq.Notification()
{
Title = "Error",
Content = "Unable to retrieve traffic data."
});
this.IsDataLoading = false;
}, () =>
{
this.IsDataLoading = false;
});
}
/// <summary>
/// Gets the travel time.
/// </summary>
/// <param name="destination">The destination.</param>
/// <returns></returns>
public IObservable<TravelTime> GetTravelTime(string destination)
{
return new AnonymousObservable<TravelTime>(observer =>
{
IObservable<string> observable = ObservableHelper.TextFromUri(new Uri(HoustonTranstarUri.BaseUri + destination));
observable.Subscribe(result =>
{
if (result != null)
{
int tableStart = result.IndexOf("<span id=\"RoadwayList\"");
int tableEnd = result.IndexOf("</span>", tableStart);
XElement xmlDoc = XElement.Parse(result.Substring(tableStart, (tableEnd + 7) - tableStart));
int i = 0;
TravelTime travelTime = new TravelTime();
foreach (var node in xmlDoc.Nodes())
{
switch (i)
{
case 4:
travelTime.Roadway = node.ToString();
break;
case 6:
travelTime.Route = node.ToString();
break;
case 8:
travelTime.Distance = node.ToString();
break;
case 10:
travelTime.Time = node.ToString().Replace("Travel Time (mm:ss) - ", "");
break;
case 12:
travelTime.Speed = node.ToString();
break;
}
i++;
}
observer.OnNext(travelTime);
}
observer.OnCompleted();
}, ex =>
{
observer.OnError(new Exception("Unable to retrieve traffic data.", ex));
});
return Disposable.Empty;
});
}