presence/Presence.Desktop/ViewModels/StartViewModel.cs

using System.Reactive;
using Demo.Data.Repository;
using Demo.Domain.UseCase;
using Microsoft.Extensions.DependencyInjection;
using presence_client.ApiClients.Interfaces;
using ReactiveUI;

namespace Presence.Desktop.ViewModels;

public class StartViewModel : ViewModelBase, IRoutableViewModel
{
    public IScreen HostScreen { get; }
    public string? UrlPathSegment => "start";

    public ReactiveCommand<Unit, Unit> OpenGroupCommand { get; }
    public ReactiveCommand<Unit, Unit> OpenPresenceCommand { get; }
    public ReactiveCommand<Unit, Unit> GoBackCommand { get; }

    public StartViewModel(IScreen hostScreen)
    {
        HostScreen = hostScreen;

        OpenGroupCommand = ReactiveCommand.Create(() =>
        {
            HostScreen.Router.Navigate.Execute(new GroupViewModel(
                App.ServiceProvider.GetRequiredService<IGroupApiClient>(),
                App.ServiceProvider.GetRequiredService<IUserApiClient>(),
                HostScreen
            ));
        });

        OpenPresenceCommand = ReactiveCommand.Create(() =>
        {
            HostScreen.Router.Navigate.Execute(new PresenceViewModel(
                App.ServiceProvider.GetRequiredService<IPresenceApiClient>(),
                App.ServiceProvider.GetRequiredService<IGroupApiClient>(),
                HostScreen
            ));
        });

        GoBackCommand = ReactiveCommand.Create(() =>
        {
            HostScreen.Router.Navigate.Execute(new StartViewModel(HostScreen));
        });
    }
}