Intermediate, add dynamic data, not yet w/o errors/warnings

Stars Assistant/Services/Game.cs

@@ -123,6 +123,7 @@ public class Game
         GameEngine.Game = this;
         Locator.CurrentMutable.RegisterConstant(new CSVDataLoader(), typeof(CSVDataLoader));
         Locator.CurrentMutable.Register(() => new StarsDatabase(DatabaseFileName), typeof(StarsDatabase));
+        Locator.CurrentMutable.RegisterConstant(new PlanetManager(), typeof(Services.PlanetManager));
 
         // TESTING HELPER
         if (__doCreateTestData)

Stars Assistant/Services/PlanetManager.cs

@@ -0,0 +1,36 @@
+using System;
+using System.ComponentModel;
+using System.Reactive.Linq;
+using DynamicData;
+using DynamicData.Binding;
+using Splat;
+using StarsAssistant.Model;
+using StarsAssistant.ViewModels;
+
+namespace StarsAssistant.Services;
+
+public class PlanetManager
+{
+    protected Services.Game Game = Locator.Current.GetService<Services.Game>()!;
+
+    private SourceCache<Planet, string> _planets = new(p => p.Name);
+
+    public IObservable<IChangeSet<PlayerPlanetViewModel, string>> PlayerPlanetsSource
+        =>  _planets
+                .Connect()
+                .Filter(planet => planet.OwnerId == Game.Player.Name)
+                .Transform(planet => new PlayerPlanetViewModel(planet));
+
+    public PlanetManager()
+    {
+    }
+
+    public void __test__Init()
+    {
+        using var db = Locator.Current.GetService<StarsDatabase>()!;
+        {
+            var playerPlanets = db.Planet.ToList();
+            _planets.AddOrUpdate(playerPlanets);
+        }
+    }
+}