private void FilterTextChanged()
{
if (string.IsNullOrEmpty(FilterText))
{
FilteredStops.Clear();
}
else
{
var query = FilterText.ToLower();
FilteredStops.ReplaceRange(
AllStops.Where(s => s.Name.ToLower().Contains(query) || s.Locality.ToLower().Contains(query)).Take(25));
}
}
private void UpdateStops(bool filterOnly = false)
{
if (!filterOnly)
{
NearbyStops.ReplaceRange(
AllStops.OrderBy(s => s.Data.Distance).Take(15)
);
FavoriteStops.ReplaceRange(
AllStops.Where(s => s.Data.IsFavorite)
);
}
FilterTextChanged();
}
public async Task LoadItems()
{
Trace.WriteLine("Loading Items");
if (IsBusy || Application.Current == null)
{
return;
}
IsBusy = true;
try
{
var items = await BusStopService.GetStops(
() => LoadingStopsFromApi = true
);
LoadingStopsFromApi = false;
AllStops.ReplaceRange(items.Stops);
await ReloadLocation();
}
catch (Exception ex)
{
Trace.Write(ex.ToString());
// Message maybe?
MessagingCenter.Send(new MessagingCenterAlert
{
Title = "Error",
Message = "Unable to load items.",
Cancel = "OK"
}, "message");
}
finally
{
Device.BeginInvokeOnMainThread(() => IsBusy = false);
UpdateStops();
}
}
public override List <Edge> GetShortestRoute(int sourceStopId, int destinationStopId, DateTime when)
{
Console.WriteLine("Looking for route between '" + GetStop(sourceStopId).StopName + "' and '" + GetStop(destinationStopId).StopName + "'");
var result = new List <Edge>();
var completeNodes = new List <CompleteNode>();
var inclompleteNodes = new List <Node>();
bool traceComplete = false;
// Kezdetben csak a forráspont van kész, nem vezet hozzá semmi
completeNodes.Add(new CompleteNode
{
stopId = sourceStopId,
departureTime = when.TimeOfDay,
viaNode = null,
usedEdges = new Stack <Edge>(),
usedRouteIds = new Stack <int>()
});
// Mindenki mást pedig várakozik a kifejtésre
foreach (var stop in AllStops.Where(s => s.DbId != sourceStopId))
{
inclompleteNodes.Add(new Node
{
stopId = stop.DbId
});
}
// Az útvonalkereső hurok
while ((!traceComplete) && (inclompleteNodes.Count > 0))
{
Console.WriteLine("Iteration: " + completeNodes.Count + " cnodes, " + inclompleteNodes.Count + " icnodes");
CompleteNode nextNode = null;
var lck = new Object();
var garbage = new ConcurrentBag <CompleteNode>();
#region Következő csomópont keresése
{
completeNodes.AsParallel().ForAll(
currentNode =>
{
var candidate = GetNextCompleteNode(currentNode, inclompleteNodes, when);
if (candidate != null)
{
// van kimenő él
// atomi művelet!!
lock (lck)
{
if ((nextNode == null) || (candidate.departureTime < nextNode.departureTime))
{
nextNode = candidate;
}
}
}
else
{
garbage.Add(currentNode);
}
});
}
#endregion
if (nextNode == null)
{
Console.WriteLine("No route between '" + GetStop(sourceStopId).StopName + "' and '" + GetStop(destinationStopId).StopName + "'");
break;
}
// Takarítás
garbage.ToList().ForEach(g => completeNodes.Remove(g));
garbage = new ConcurrentBag <CompleteNode>();
// Áthelyezés a kész csomópontok közé
completeNodes.Add(nextNode);
var removedNode = inclompleteNodes.Single(n => n.stopId == nextNode.stopId);
inclompleteNodes.Remove(removedNode);
// Ha megtaláltuk a célt, akkor leállunk
if (nextNode.stopId == destinationStopId)
{
traceComplete = true;
Console.WriteLine("Trace complete between '" + GetStop(sourceStopId).StopName + "' and '" + GetStop(destinationStopId).StopName + "'");
Console.WriteLine("Shortest path Found. # of used routes: " + nextNode.usedRouteIds.Count + " | arrival: " + nextNode.departureTime.ToString());
result.AddRange(nextNode.usedEdges.Reverse());
result.ToList().ForEach(
e =>
{
Console.WriteLine(e.GetType().Name + " " + e.ToString());
});
}
}
return(result);
}
private void BusStopFavorited(BusStopFavorited e)
{
FavoriteStops.ReplaceRange(
AllStops.Where(s => s.Data.IsFavorite)
);
}
public override List <Edge> GetShortestRoute(int sourceStopId, int destinationStopId, DateTime when)
{
if (!_priorityQueues.ContainsKey(Thread.CurrentThread))
{
var storage = new BinaryHeapPriorityQueue();
_priorityQueues.Add(Thread.CurrentThread, storage);
}
var result = new List <Edge>();
#region Dijkstra
{
int iterationCount = 0;
Console.WriteLine("Looking for route between '" + GetStop(sourceStopId).StopName + "' and '" + GetStop(destinationStopId).StopName + "'");
var inclompleteNodes = new List <Node>();
bool traceComplete = false;
// Kezdetben csak a forráspont van kész, nem vezet hozzá semmi
var currentNode = new CompleteNode
{
stopId = sourceStopId,
departureTime = when.TimeOfDay,
viaNode = null,
usedEdges = new Stack <Edge>(),
usedRouteIds = new Stack <int>()
};
// Mindenki mást pedig várakozik a kifejtésre
foreach (var stop in AllStops.Where(s => s.DbId != sourceStopId))
{
inclompleteNodes.Add(new Node
{
stopId = stop.DbId
});
}
// Az útvonalkereső hurok
while ((!traceComplete) && (inclompleteNodes.Count > 0))
{
if ((iterationCount % 25) == 0)
{
Console.WriteLine("Iteration: " + ((iterationCount / 25) + 1) + " x 25 | with " + inclompleteNodes.Count + " icnodes");
iterationCount++;
}
currentNode = GetNextCompleteNode(currentNode, inclompleteNodes, when);
if (currentNode == null)
{
Console.WriteLine("No route between '" + GetStop(sourceStopId).StopName + "' and '" + GetStop(destinationStopId).StopName + "'");
break;
}
// Áthelyezés a kész csomópontok közé
{
var removedNode = inclompleteNodes.Single(n => n.stopId == currentNode.stopId);
inclompleteNodes.Remove(removedNode);
}
// Ha megtaláltuk a célt, akkor leállunk
if (currentNode.stopId == destinationStopId)
{
traceComplete = true;
Console.WriteLine("Trace complete between '" + GetStop(sourceStopId).StopName + "' and '" + GetStop(destinationStopId).StopName + "'");
Console.WriteLine("Shortest path Found. # of used routes: " + currentNode.usedRouteIds.Count + " | arrival: " + currentNode.departureTime.ToString());
result.AddRange(currentNode.usedEdges.Reverse());
result.ForEach(
e =>
{
Console.WriteLine(e.GetType().Name + " " + e.ToString());
});
}
}
}
#endregion
if (_priorityQueues.ContainsKey(Thread.CurrentThread))
{
_priorityQueues.Remove(Thread.CurrentThread);
}
return(result);
}
