public static void GoToNextCheckpoint(BusOnRoad bor)
{
var svc = BusHelper.BusSvcs [bor.routeName];
if (bor.nextCheckpointEnumerator == null)
{
bor.nextCheckpointEnumerator = svc.checkpoints.GetEnumerator();
}
double longitude = BusHelper.BusStops [svc.firstStop].longitude;
double latitude = BusHelper.BusStops [svc.firstStop].latitude;
// update position based on checkpoint
if (bor.nextCheckpointEnumerator.MoveNext())
{
longitude = (double)bor.nextCheckpointEnumerator.Current;
}
else
{
BusHelper.RemoveBusOnRoad(bor.vehiclePlate);
return;
}
if (bor.nextCheckpointEnumerator.MoveNext())
{
latitude = (double)bor.nextCheckpointEnumerator.Current;
}
bor.longitude = longitude;
bor.latitude = latitude;
}
public App()
{
// load bus data
BusHelper.LoadBusData();
// Display the main page of your application
MainPage = new NUSBusMap.MainPage();
}
private async void UpdatePublicBusPins()
{
while (true)
{
// skip update pins if map is freezed (user clicks on pin)
if (!FreezeMap)
{
// remove all bus pins
foreach (CustomPin p in map.PublicBusPins)
{
map.Pins.Remove(p.Pin);
}
map.PublicBusPins.Clear();
// get list of bus stops to call based on enabled public bus svcs on map
List <string> busStopCodes = new List <string> ();
foreach (string serviceNo in BusHelper.PublicBusSvcOnMap)
{
busStopCodes = busStopCodes.Union(BusHelper.PublicBusSvcStops [serviceNo]).ToList();
}
// get public bus real-time location (by calling API)
List <PublicBusOnRoad> publicBuses = new List <PublicBusOnRoad> ();
foreach (string busStopCode in busStopCodes)
{
// get buses passing by bus stop (ignore same bus)
var thisPublicBuses = await BusHelper.GetPublicBuses(busStopCode);
publicBuses.AddRange(thisPublicBuses.Where(b1 => !publicBuses.Any(b2 => b2.IsSameBus(b1, MARGIN_OF_ERROR))));
}
// add pin if bus has location
foreach (PublicBusOnRoad bus in publicBuses.Where(bus =>
(bus.Latitude.HasValue && !bus.Latitude.Value.Equals(0)) &&
(bus.Longitude.HasValue && !bus.Longitude.Value.Equals(0))))
{
var description = "Start: " + BusHelper.PublicBusStopCodeName[bus.OriginatingID] + "\n" +
"End: " + BusHelper.PublicBusStopCodeName[bus.TerminatingID] + "\n";
var pin = new Pin {
Type = PinType.Place,
Position = new Xamarin.Forms.Maps.Position(bus.Latitude.Value, bus.Longitude.Value),
Label = bus.ServiceNo,
Address = description
};
var busPin = new CustomPin {
Pin = pin,
Id = bus.ServiceNo,
Url = bus.ServiceNo + ".png"
};
map.Pins.Add(pin);
map.PublicBusPins.Add(busPin);
}
}
// continue after interval
await Task.Delay(TimeSpan.FromSeconds(SettingsVars.Variables ["REFRESH_PUBLIC_BUS_INTERVAL"].value));
}
}
private static async void DispatchBasedOnTime(BusSvc bs)
{
while (BusHelper.IsWithinServiceTiming(bs.routeName))
{
BusHelper.AddBusOnRoad(bs.routeName + "-" + BusHelper.ActiveBuses.Count, bs.routeName);
// dispatch again after freq
await Task.Delay(TimeSpan.FromMinutes(bs.freq [BusHelper.GetTimeOfDay(bs.routeName)]));
}
}
private async void UpdateBusPins()
{
while (true)
{
// skip update pins if map is freezed (user clicks on pin)
if (!FreezeMap)
{
// remove all bus pins
foreach (CustomPin p in map.BusPins)
{
map.Pins.Remove(p.Pin);
}
map.BusPins.Clear();
foreach (BusOnRoad bor in BusHelper.ActiveBuses.Values)
{
// move bus to next checkpoint on the route for simulation
// actual deployment: get real-time position of bus
BusSimulator.GoToNextCheckpoint(bor);
// add pin to map if service is to be shown on map
if (BusHelper.BusSvcs [bor.routeName].showOnMap)
{
var description = "Start: " + BusHelper.BusStops [bor.firstStop].name + "\n" +
"End: " + BusHelper.BusStops [bor.lastStop].name + "\n" +
"Approaching: " + BusHelper.BusStops [(string)bor.nextStopEnumerator.Current].name + "\n" +
"In: " + BusHelper.GetArrivalTiming(bor.vehiclePlate) + "\n";
var pin = new Pin {
Type = PinType.Place,
Position = new Xamarin.Forms.Maps.Position(bor.latitude, bor.longitude),
Label = bor.routeName,
Address = description
};
var bus = new CustomPin {
Pin = pin,
Id = bor.routeName,
Url = bor.routeName + ".png"
};
map.Pins.Add(pin);
map.BusPins.Add(bus);
}
}
// remove buses which has finished plying
List <BusOnRoad> finishedBuses = BusHelper.ActiveBuses.Values.Where(bor => bor.finished).ToList();
foreach (BusOnRoad bor in finishedBuses)
{
BusHelper.RemoveBusOnRoad(bor.vehiclePlate);
}
}
// continue after interval
await Task.Delay(TimeSpan.FromSeconds(SettingsVars.Variables ["REFRESH_BUS_INTERVAL"].value));
}
}
// private static double avgSpeedPeak = 4.0; // in m/s
// private static double avgSpeedNonPeak = 5.0; // in m/s
// private static double avgBoardingTimePeak = 30; // in secs
// private static double avgBoardingTimeNonPeak = 15; // in secs
public static void DispatchBuses()
{
// set timer for each bus service to dispatch bus at freq (if within service timing)
foreach (BusSvc bs in BusHelper.BusSvcs.Values)
{
Device.StartTimer(TimeSpan.FromMinutes(bs.freq [(int)Days.WEEKDAY]), () => {
BusHelper.AddBusOnRoad(bs.routeName + "-" + BusHelper.ActiveBuses.Count, bs.routeName);
return(IsWithinServiceTiming(bs.routeName));
});
}
}
private bool UpdatePositions()
{
// skip update pins if map is freezed
if (FreezeMap)
{
return(true);
}
// remove all bus pins
foreach (CustomPin p in map.BusPins)
{
map.Pins.Remove(p.Pin);
}
map.BusPins.Clear();
foreach (BusOnRoad bor in BusHelper.ActiveBuses.Values)
{
// temp change position randomly for test
// bor.latitude += rand.NextDouble () * 0.0001 - 0.00005;
// bor.longitude += rand.NextDouble () * 0.0001 - 0.00005;
// move bus to next checkpoint on the route for simulation
BusSimulator.GoToNextCheckpoint(bor);
// add pin to map if svc show on map
if (BusHelper.BusSvcs [bor.routeName].showOnMap)
{
var description = "Start: " + BusHelper.BusStops [bor.firstStop].name + "\n" +
"End: " + BusHelper.BusStops [bor.lastStop].name + "\n" +
"Approaching: " + BusHelper.BusStops [(string)bor.nextStopEnumerator.Current].name + "\n" +
"In: " + BusHelper.GetArrivalTiming((string)bor.nextStopEnumerator.Current, bor.routeName);
var pin = new Pin {
Type = PinType.Place,
Position = new Xamarin.Forms.Maps.Position(bor.latitude, bor.longitude),
Label = bor.routeName,
Address = description
};
var bus = new CustomPin {
Pin = pin,
Id = bor.routeName,
Url = bor.routeName + ".png"
};
map.Pins.Add(pin);
map.BusPins.Add(bus);
}
}
return(true);
}
public SvcInfoPage(string busSvcName)
{
Title = busSvcName + " Route Information";
// show only for nus buses
if (!BusHelper.IsPublic(busSvcName))
{
Label header = new Label {
Text = busSvcName,
FontSize = Device.GetNamedSize(NamedSize.Large, typeof(Label)),
FontAttributes = FontAttributes.Bold,
HorizontalOptions = LayoutOptions.Center
};
var view = new TableView()
{
Intent = TableIntent.Data
};
var root = new TableRoot();
var section = new TableSection();
foreach (string busStopCode in BusHelper.BusSvcs[busSvcName].stops)
{
section.Add(new BusStopCell(busStopCode));
}
root.Add(section);
view.Root = root;
Content = new StackLayout {
Children =
{
header,
view
}
};
}
else
{
Content = new Label {
Text = "Page under construction"
};
}
}
private async void CheckAlertTiming()
{
while (true)
{
// check each stop and each svc that are enabled
// incl public bus
foreach (string busStopCode in enabledStops)
{
foreach (string routeName in enabledSvcs)
{
var stop = BusHelper.BusStops [busStopCode];
if (stop.services.Union(stop.publicServices).Contains(routeName))
{
// get arrival timing of svc in stop and display alert if below alert minutes
var arrivalTimingStr = (stop.services.Contains(routeName)) ?
BusHelper.GetArrivalTiming(busStopCode, routeName) :
await BusHelper.GetPublicBusesArrivalTiming(busStopCode, routeName);
var nextTimingStr = Regex.Match(arrivalTimingStr, @"\d+").Value;
if (!nextTimingStr.Equals(String.Empty))
{
var nextTiming = Int32.Parse(nextTimingStr);
if (nextTiming == 0)
{
await DisplayAlert("Bus Alert", routeName + " is arriving " + stop.name + "!", "OK", "Cancel");
}
else if (nextTiming <= SettingsVars.Variables ["ALERT_MINUTES"].value)
{
await DisplayAlert("Bus Alert", routeName + " is arriving " + stop.name + " at " + nextTiming + " min.", "OK", "Cancel");
}
}
else if (arrivalTimingStr.Contains("Arr"))
{
await DisplayAlert("Bus Alert", routeName + " is arriving " + stop.name + "!", "OK", "Cancel");
}
}
}
}
// continue after interval
await Task.Delay(TimeSpan.FromSeconds(SettingsVars.Variables ["REFRESH_ALERT_INTERVAL"].value));
}
}
private void OnClickRoute(object sender, EventArgs e)
{
var routeName = ((Button)sender).StyleId;
// take the correct list for public/nus bus
var busSvcStops = (BusHelper.IsPublic(routeName)) ? BusHelper.PublicBusSvcStops[routeName] : BusHelper.BusSvcs [routeName].stops;
if (((Button)sender).Opacity.Equals(0.3))
{
// activate bus service
// add all stops from bus service into list if list does not contains bus stop
((Button)sender).Opacity = 1;
enabledSvcs.Add(routeName);
foreach (string busStopCode in busSvcStops)
{
if (!stops.Contains(BusHelper.BusStops[busStopCode]))
{
stops.Add(BusHelper.BusStops[busStopCode]);
}
}
}
else
{
// deactivate bus service
// remove bus stop of bus service from list if no other enabled bus service shares the same bus stop
// incl public bus
((Button)sender).Opacity = 0.3;
enabledSvcs.Remove(routeName);
foreach (string busStopCode in busSvcStops)
{
var stop = BusHelper.BusStops [busStopCode];
var otherEnabledSvcsInStop = enabledSvcs.Intersect(stop.services.Union(stop.publicServices)).ToList();
if (otherEnabledSvcsInStop.Count == 0)
{
stops.Remove(stop);
}
}
}
}
public MapPage()
{
// map with default centre at NUS
var NUSCenter = new Xamarin.Forms.Maps.Position(1.2966, 103.7764);
map = new BusMap(
MapSpan.FromCenterAndRadius(NUSCenter, Distance.FromKilometers(DEFAULT_RADIUS)))
{
IsShowingUser = true,
HeightRequest = 100,
WidthRequest = 960,
VerticalOptions = LayoutOptions.FillAndExpand
};
// shift to current location if possible (activate only for device testing)
// ShiftToCurrentLocation ();
// add pins for each bus stops
foreach (BusStop busStop in BusHelper.BusStops.Values)
{
var description = "";
foreach (string svc in busStop.services)
{
description += svc + ": " + BusHelper.GetArrivalTiming(busStop.busStopCode, svc) + "\n";
}
var pin = new Pin {
Type = PinType.Place,
Position = new Xamarin.Forms.Maps.Position(busStop.latitude, busStop.longitude),
Label = busStop.name + " - " + busStop.busStopCode,
Address = description
};
var stop = new CustomPin {
Pin = pin,
Id = "stop",
Url = "stop.png"
};
map.Pins.Add(pin);
map.StopPins.Add(stop);
}
// slider to change radius from 0.1 - 0.9 km
var slider = new Slider(1, 9, 5);
slider.ValueChanged += (sender, e) => {
var zoomLevel = e.NewValue; // between 1 and 9
currRadius = 1.0 - (zoomLevel / 10.0);
map.MoveToRegion(MapSpan.FromCenterAndRadius(
map.VisibleRegion.Center, Distance.FromKilometers(currRadius)));
};
// add map and slider to stack layout
var stack = new StackLayout {
Spacing = 0
};
stack.Children.Add(map);
stack.Children.Add(slider);
Icon = "MapTabIcon.png";
Title = "Map";
Content = stack;
// add random buses for testing
BusSimulator.DispatchBuses();
// set timer to update bus and current location
Device.StartTimer(TimeSpan.FromSeconds(REFRESH_INTERVAL), UpdatePositions);
}
private async void UpdateStopPins()
{
while (true)
{
// skip update pins if map is freezed (user clicks on pin)
if (!FreezeMap)
{
// remove all stop pins
foreach (CustomPin p in map.StopPins)
{
map.Pins.Remove(p.Pin);
}
map.StopPins.Clear();
// add stop pins, with change in arrival timing
foreach (BusStop busStop in BusHelper.BusStops.Values)
{
var description = "";
foreach (string svc in busStop.services)
{
// handle repeated service in bus stop case
// show timing for both directions
if (busStop.repeatedServices != null && busStop.repeatedServices.Contains(svc))
{
description += svc + "(to " + BusHelper.BusStops [BusHelper.BusSvcs [svc].loopStop].name + "): ";
description += BusHelper.GetArrivalTiming(busStop.busStopCode, svc, "BEFORE") + "\n";
description += svc + "(to " + BusHelper.BusStops [BusHelper.BusSvcs [svc].lastStop].name + "): ";
description += BusHelper.GetArrivalTiming(busStop.busStopCode, svc, "AFTER") + "\n";
}
else
{
description += svc + ": " + BusHelper.GetArrivalTiming(busStop.busStopCode, svc) + "\n";
}
}
// get public bus arrival timing for bus stop (if public buses pass by)
// busStopCode with all digits -> public bus will pass by
if (BusHelper.IsPublic(busStop.busStopCode))
{
description += await BusHelper.GetPublicBusesArrivalTiming(busStop.busStopCode);
}
var pin = new Pin {
Type = PinType.Place,
Position = new Xamarin.Forms.Maps.Position(busStop.latitude, busStop.longitude),
Label = busStop.name + " - " + busStop.busStopCode,
Address = description
};
var stop = new CustomPin {
Pin = pin,
Id = "stop",
Url = "stop.png"
};
map.Pins.Add(pin);
map.StopPins.Add(stop);
}
}
// continue after interval
await Task.Delay(TimeSpan.FromSeconds(SettingsVars.Variables ["REFRESH_STOP_INTERVAL"].value));
}
}
