public static double Distance(GpsLocation location1, GpsLocation location2)
{
return Distance(location1.Latitude, location1.Longitude, location2.Latitude, location2.Longitude);
}
public async Task <IEnumerable <BusStop> > GetBusStopsInCircleAsync(GpsLocation location, double radius)
{
var requestUrl = new StringBuilder(serviceUrl);
requestUrl.AppendFormat("?StopAlso=True&Circle={0},{1},{2}&ReturnList=StopPointName,StopID,StopCode1,StopCode2,StopPointIndicator,StopPointState,Towards,Latitude,Longitude,LineName", location.Latitude, location.Longitude, radius);
var client = new System.Net.Http.HttpClient();
var response = Deserialize(await client.GetStringAsync(requestUrl.ToString()));
var busStopLineInfo = new Dictionary <string, HashSet <string> >();
var busStops = new List <BusStop>();
foreach (var item in response)
{
var itemType = Convert.ToInt32(item[0]);
// read bus stop info
if (itemType == 0)
{
var busStop = new BusStop
{
Name = item[1] as string,
Id = item[2] as string,
Code = item[3] as string,
Code2 = item[4] as string,
Towards = item[5] as string,
Indicator = item[6] as string,
State = Convert.ToInt32(item[7]),
Location = new GpsLocation(Convert.ToDouble(item[8]), Convert.ToDouble(item[9]))
};
// filter out ghost stops (without any codes or buses)
if (busStop.Code != null || busStop.Code2 != null)
{
busStops.Add(busStop);
}
}
// read line info
if (itemType == 1)
{
var lineInfo = item[10] as string;
if (!string.IsNullOrEmpty(lineInfo))
{
var stopId = item[2] as string;
HashSet <string> linesInfo;
if (!busStopLineInfo.TryGetValue(stopId, out linesInfo))
{
linesInfo = new HashSet <string>();
busStopLineInfo.Add(stopId, linesInfo);
}
linesInfo.Add(lineInfo);
}
}
}
// add line info to bus stops
foreach (var busStop in busStops)
{
if (busStopLineInfo.ContainsKey(busStop.Id))
{
var lineInfo = string.Concat(busStopLineInfo[busStop.Id].OrderBy(i => i, busRouteComparer).Select(i => i + ","));
busStop.LineInfo = lineInfo.Remove(lineInfo.Length - 1, 1);
}
}
return(busStops);
}
public static double Distance(GpsLocation location1, GpsLocation location2)
{
return(Distance(location1.Latitude, location1.Longitude, location2.Latitude, location2.Longitude));
}
