WinWARP/WinWARP.Ui/App.xaml.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml.Controls.Primitives;
using Microsoft.UI.Xaml.Data;
using Microsoft.UI.Xaml.Input;
using Microsoft.UI.Xaml.Media;
using Microsoft.UI.Xaml.Navigation;
using Windows.ApplicationModel;
using Windows.ApplicationModel.Activation;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.ApplicationSettings;
using WinUI3Localizer;
using WinWARP.Core.ViewModels;
using WinWARP.Core.ViewModels.ConfigSettings;
using WinWARP.Core.ViewModels.Settings;
using WinWARP.Core.Data;
using WinWARP.Ui.Services;
using WinWARP.Ui.Views;
using WinWARP.Ui.Views.Settings;
using WinWARP.Core.Services.Implementations;
using WinWARP.Core.Services.Interfaces;
using System.Diagnostics;

// To learn more about WinUI, the WinUI project structure,
// and more about our project templates, see: http://aka.ms/winui-project-info.

namespace WinWARP.Ui;
/// <summary>
/// Provides application-specific behavior to supplement the default Application class.
/// </summary>
public partial class App : Application
{
    public static IServiceProvider Services
    {
        get;
        private set;
    }

    private Window? _window;

    /// <summary>
    /// Initializes the singleton application object.  This is the first line of authored code
    /// executed, and as such is the logical equivalent of main() or WinMain().
    /// </summary>
    public App()
    {
        InitializeComponent();
        Services = ConfigureServices();

        using var context = Services.GetRequiredService<IDbContextFactory<AppDbContext>>().CreateDbContext();
        context.Database.EnsureCreated();
    }

    /// <summary>
    /// Configures the services for dependency injection.
    /// </summary>
    /// <returns></returns>
    private static ServiceProvider ConfigureServices()
    {
        var services = new ServiceCollection();

        // DB
        Debug.WriteLine(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "WinWARP", "app.db"));
        services.AddDbContextFactory<AppDbContext>(options =>
        {
            var folder = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "WinWARP");

            if (!Directory.Exists(folder))
            {
                Directory.CreateDirectory(folder);
            }

            var dbPath = Path.Combine(folder, "app.db");
            options.UseSqlite($"Data Source={dbPath}");
        }); 
        services.AddTransient<ISubscriptionDbService, SubscriptionDbService>();

        // ViewModels
        services.AddTransient<HomeViewModel>();
        services.AddTransient<SettingsViewModel>();
        services.AddTransient<SubsSettingsViewModel>();
        services.AddTransient<ConfigSettingsViewModel>();
        services.AddSingleton<MainViewModel>();

        services.AddTransient<DnsSettingsViewModel>();
        services.AddTransient<GeneralSettingsViewModel>();
        services.AddTransient<InboundSettingsViewModel>();
        services.AddTransient<RoutingSettingsViewModel>();
        services.AddTransient<TlsSettingsViewModel>();
        services.AddTransient<WarpSettingsViewModel>();

        // Views
        services.AddTransient<MainWindow>();
        
        // UI services
        var navigationService = new NavigationService();
        navigationService.Configure(typeof(HomeViewModel), typeof(HomePage));
        navigationService.Configure(typeof(SettingsViewModel), typeof(SettingsPage));
        navigationService.Configure(typeof(SubsSettingsViewModel), typeof(SubsSettingsPage));
        navigationService.Configure(typeof(ConfigSettingsViewModel), typeof(ConfigSettingsPage));

        navigationService.Configure(typeof(GeneralSettingsViewModel), typeof(GeneralSettingsPage));
        navigationService.Configure(typeof(UpdateSettingsViewModel), typeof(UpdateSettingsPage));

        navigationService.Configure(typeof(InboundSettingsViewModel), typeof(InboundSettingsPage));
        navigationService.Configure(typeof(RoutingSettingsViewModel), typeof(RoutingSettingsPage));
        navigationService.Configure(typeof(DnsSettingsViewModel), typeof(DnsSettingsPage));
        navigationService.Configure(typeof(TlsSettingsViewModel), typeof(TlsSettingsPage));
        navigationService.Configure(typeof(WarpSettingsViewModel), typeof(WarpSettingsPage));

        services.AddSingleton<INavigationService>(navigationService);
        
        services.AddSingleton<ILocalizationService, LocalizationService>();

        return services.BuildServiceProvider();
    }

    /// <summary>
    /// Invoked when the application is launched.
    /// </summary>
    /// <param name="args">Details about the launch request and process.</param>
    protected async override void OnLaunched(Microsoft.UI.Xaml.LaunchActivatedEventArgs args)
    {

        var stringsFolderPath = System.IO.Path.Combine(AppContext.BaseDirectory, "Strings");
        var localizer = await new LocalizerBuilder()
           .AddStringResourcesFolderForLanguageDictionaries(stringsFolderPath)
           .SetOptions(options =>
           {
               options.DefaultLanguage = "en-US";
           })
           .Build();

        _window = Services.GetRequiredService<MainWindow>();
        _window.Activate();
    }
}