bind fleet summaries, fixup fleet post processing

Stars Assistant/ViewModels/PlayerPlanetViewModel.cs

@@ -2,6 +2,7 @@ using System.Collections.ObjectModel;
 using System.Reactive.Disposables;
 using System.Reactive.Linq;
 using Microsoft.EntityFrameworkCore;
+using DynamicData;
 using ReactiveUI;
 using ReactiveUI.SourceGenerators;
 using StarsAssistant.Services;
@@ -55,8 +56,24 @@ public partial class PlayerPlanetViewModel : ViewModelBase
             .Select(remMines => Math.Max(0, GameEngine.MaxOperableMinesForPlayer(_populationTarget, Value) - Mines))
             .ToProperty(this, vm => vm.RemainingMines);
 
+        FleetManager fm = Locator.Current.GetService<FleetManager>()!;
+
+        var fleetSummaryChanges = fm.FleetSummaries
+            .Connect()
+            .Watch(Name)
+            .Log(this, "fleetSummaryChange", change => $"{Name}: {change.Reason}: {change.Previous} => {change.Current}")
+        ;
+
+        _populationEnRouteHelper = fleetSummaryChanges
+            .Select(change => change.Reason != ChangeReason.Remove ? change.Current.TotalColonists : 0)
+            .Log(this, "PopulationEnRoute", pop => $"{Name}: {pop}")
+            .ToProperty(this, vm => vm.PopulationEnRoute)
+        ;
+
         this.WhenActivated((CompositeDisposable disposables) => 
         {
+            disposables.Add(_populationEnRouteHelper);
+
             // /* handle activation */
             // Disposable
             //     .Create(() => { /* handle deactivation */ })
@@ -185,6 +202,9 @@ public partial class PlayerPlanetViewModel : ViewModelBase
     [ObservableAsProperty]
     private int _remainingMines;
 
+    [ObservableAsProperty]
+    private int _populationEnRoute;
+
     #endregion
 
     #region Helper functions