harmonia/Harmonia.WinUI/App.xaml.cs

using Harmonia.Core.Extensions;
using Harmonia.WinUI.Caching;
using Harmonia.WinUI.Messaging;
using Harmonia.WinUI.Session;
using Harmonia.WinUI.Storage;
using Harmonia.WinUI.ViewModels;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.UI.Xaml;
using System;

namespace Harmonia.WinUI;

public partial class App : Application
{
    private Window? _mainWindow;

    public static IServiceProvider ServiceProvider { get; private set; }

    static App()
    {
        ServiceCollection services = new();

        services.AddSingleton<MainWindow>();

        //services.AddSingleton<MainViewModel>();
        services.AddSingleton<PlayerViewModel>();
        services.AddSingleton<PlayingSongViewModel>();
        services.AddSingleton<PlaylistsViewModel>();
        services.AddSingleton<PlaylistDetailViewModel>();

        services.AddSingleton<IAudioBitmapImageCache, AudioBitmapImageCache>();
        services.AddSingleton<IStorageProvider, WindowsStorageProvider>();
        services.AddSingleton<IMessageService, WindowsMessageService>();

        services.AddSingleton<ISessionService, JsonSessionService>();
        services.AddSingleton(sp => sp.GetRequiredService<ISessionService>().Session.Window);
        services.AddSingleton(sp => sp.GetRequiredService<ISessionService>().Session.Player);
        services.AddSingleton(sp => sp.GetRequiredService<ISessionService>().Session.Playlist);

        services.AddSingleton<ISessionRestorer, SessionRestorer>();
        services.AddSingleton<ISessionTracker, SessionTracker>();

        services.AddHarmonia();

        ServiceProvider = services.BuildServiceProvider();
    }

    public App()
    {
        InitializeComponent();
    }

    protected override async void OnLaunched(LaunchActivatedEventArgs args)
    {
        await ServiceProvider.InitializeHarmoniaAsync();

        ISessionService sessionService = ServiceProvider.GetRequiredService<ISessionService>();
        await sessionService.LoadAsync();

        ISessionRestorer sessionRestorer = ServiceProvider.GetRequiredService<ISessionRestorer>();
        sessionRestorer.Restore();

        ISessionTracker sessionTracker = ServiceProvider.GetRequiredService<ISessionTracker>();
        sessionTracker.Start();

        _mainWindow = ServiceProvider.GetRequiredService<MainWindow>();
        _mainWindow.Activate();
    }
}