sa/Stars Assistant/Services/PlanetManager.cs

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 InitFromDatabase() 
    {
        using var db = Locator.Current.GetService<StarsDatabase>()!;
        {
            var allPlanets = db.Planet.ToList();
            _planets.AddOrUpdate(allPlanets);
        }
    }
}