public static async Task<List<Route>> ParsePredictionsAsync(XDocument document)
{
var routes = new List<Route>();
string routeNum;
IEnumerable<XElement> rootElements;
//If there was an error getting the xml, return an empty list
if (document.Root == null) return routes;
rootElements = document.Element("body").Elements("predictions");
foreach(XElement predictionElement in rootElements)
{
string routeTitle = predictionElement.Attribute("routeTitle").Value;
routeNum = ParseRouteNum(predictionElement);
//Check to see if the route has already been added to the collection
if (!routes.Any(r => r.RouteNumber == routeNum))
{
Route newRoute = new Route(routeTitle, routeNum);
var subElement = predictionElement.Element("direction");
if (subElement != null)
{
var dirTitle = subElement.Attribute("title").Value;
var times = ParseTimes(subElement);
newRoute.Directions.Add(new RouteDirection(dirTitle, times));
routes.Add(newRoute);
}
}
else
{
Route tempRoute = routes.Find(r => r.RouteNumber == routeNum);
var subElement = predictionElement.Element("direction");
if (subElement != null)
{
var dirTitle = subElement.Attribute("title").Value;
var times = ParseTimes(subElement);
tempRoute.Directions.Add(new RouteDirection(dirTitle, times));
}
}
}
return routes;
}
public static async Task<XDocument> GetSearchPredictionsAsync(Stop stop, Route route)
{
var url = baseUrls["searchPrediction"] + stop.stopId + "&routeTag=" + route.RouteNumber;
//Make sure to pull from the network and not cache everytime predictions are refreshed
client.DefaultRequestHeaders.IfModifiedSince = DateTime.Now;
try
{
var response = await client.GetAsync(new Uri(url));
response.EnsureSuccessStatusCode();
var reader = await response.Content.ReadAsStringAsync();
xmlDoc = XDocument.Parse(reader);
}
catch (Exception)
{
await ErrorHandler.NetworkError("Error getting predictions. Check network connection and try again.");
throw;
}
return xmlDoc;
}
public async static Task<XDocument> GetBusLocationsAsync(Route route)
{
//Because the API requires an epoch time offset for some reason...
TimeSpan epoch = (DateTime.UtcNow - new DateTime(1970, 1, 1));
var timestamp = (long)epoch.TotalMilliseconds - TimeSpan.FromMinutes(5).TotalMilliseconds;
//if (route.Equals("Powell/Mason Cable Car")) route = "59";
//else if (route.Equals("Powell/Hyde Cable Car")) route = "60";
//else if (route.Equals("California Cable Car")) route = "61";
//else if (route.Contains('-'))
//{
// route = route.Substring(0, route.IndexOf('-'));
//}
var url = baseUrls["busLocations"] + route.RouteNumber + "&t=" + timestamp;
try
{
var response = await client.GetAsync(new Uri(url));
response.EnsureSuccessStatusCode();
string reader = await response.Content.ReadAsStringAsync();
xmlDoc = await Task.Run(() => XDocument.Parse(reader));
}
catch (Exception)
{
await ErrorHandler.NetworkError("Error getting route info. Check network connection and try again.");
return null;
}
return xmlDoc;
}
public async Task<List<List<BasicGeoposition>>> GetRoutePathAsync(Route route)
{
var xmlDoc = await WebHelper.GetRoutePathAsync(route.RouteNumber);
return await Task.Run(() => MapHelper.ParseRoutePath(xmlDoc));
}
public async Task LoadDirectionsAsync(Route route)
{
SelectedRoute = route;
SelectedStop = null;
//if (route.Equals("Powell/Mason Cable Car")) route = "59";
//else if (route.Equals("Powell/Hyde Cable Car")) route = "60";
//else if (route.Equals("California Cable Car")) route = "61";
//else
//{
// route = route.Substring(0, route.IndexOf('-'));
//}
try {
var xmlDoc = await WebHelper.GetRouteDirections(route.RouteNumber);
if (xmlDoc != null)
{
DirectionsList = await Task.Run(() => ParseHelper.ParseDirections(xmlDoc));
allStopsList = await Task.Run(() => ParseHelper.ParseStops(xmlDoc));
await Task.Run(() => ParseHelper.ParseStopTags(xmlDoc, inboundStops, outboundStops));
}
}
catch (Exception)
{
throw;
}
}
public RouteMapViewModel(Route route)
{
SelectedRoute = route;
}