App.xaml.cs

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using System.Linq;
using Windows.ApplicationModel.Activation;
using Windows.ApplicationModel.Core;
using Windows.UI.Xaml;
using CommunityToolkit.Mvvm.DependencyInjection;
using Microsoft.Extensions.DependencyInjection;
using MvvmSampleUwp.Services;
using Refit;
using MvvmSampleUwp.Helpers;
using MvvmSample.Core.Services;
using MvvmSample.Core.ViewModels.Widgets;
using MvvmSample.Core.ViewModels;

namespace MvvmSampleUwp;

/// <summary>
/// Provides application-specific behavior to supplement the default <see cref="Application"/> class.
/// </summary>
sealed partial class App : Application
{
    /// <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()
    {
        this.InitializeComponent();
    }

    /// <inheritdoc/>
    protected override void OnLaunched(LaunchActivatedEventArgs e)
    {
        // Ensure the UI is initialized
        if (Window.Current.Content is null)
        {
            Window.Current.Content = new Shell();

            TitleBarHelper.StyleTitleBar();
            TitleBarHelper.ExpandViewIntoTitleBar();

            var serviceProvider = new ServiceCollection()
                //Services
                .AddSingleton<IDialogService, DialogService>()
                .AddSingleton<IFilesService, FilesService>()
                .AddSingleton<ISettingsService, SettingsService>()
                .AddSingleton(RestService.For<IRedditService>("https://www.reddit.com/"))
                //ViewModels
                .AddTransient<PostWidgetViewModel>()
                .AddTransient<SubredditWidgetViewModel>()
                .AddTransient<AsyncRelayCommandPageViewModel>()
                .AddTransient<IocPageViewModel>()
                .AddTransient<MessengerPageViewModel>()
                .AddTransient<ObservableObjectPageViewModel>()
                .AddTransient<ObservableValidatorPageViewModel>()
                .AddTransient<ValidationFormWidgetViewModel>()
                .AddTransient<RelayCommandPageViewModel>()
                .AddTransient<SamplePageViewModel>()
                .BuildServiceProvider();

            // Register services
            Ioc.Default.ConfigureServices(serviceProvider);

            ViewModelLocator.SetViewModelFactory(view =>
            {
                var viewName = view.GetType().Name;
                var viewModelName = $"{viewName}ViewModel";
                var viewModelType = typeof(SamplePageViewModel).Assembly.GetTypes().FirstOrDefault(x => x.Name == viewModelName);

                if (viewModelType == null)
                {
                    if (viewModelName.Contains("Messenger"))
                        viewModelType = typeof(MessengerPageViewModel);
                    else
                        viewModelType = typeof(SamplePageViewModel);
                }

                return serviceProvider.GetService(viewModelType);
            });
        }

        // Enable the prelaunch if needed, and activate the window
        if (e.PrelaunchActivated == false)
        {
            CoreApplication.EnablePrelaunch(true);

            Window.Current.Activate();
        }
    }
}