Libation/Source/LibationAvalonia/Views/MainWindow/MainWindow.axaml.cs

using ApplicationServices;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Markup.Xaml;
using System;
using Avalonia.ReactiveUI;
using LibationAvalonia.ViewModels;
using LibationFileManager;
using DataLayer;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace LibationAvalonia.Views
{
	public partial class MainWindow : ReactiveWindow<MainWindowViewModel>
	{
		public event EventHandler Load;
		public event EventHandler<List<LibraryBook>> LibraryLoaded;
		private MainWindowViewModel _viewModel;

		public MainWindow()
		{
			this.DataContext = _viewModel = new MainWindowViewModel();

			InitializeComponent();
#if DEBUG
			this.AttachDevTools();
#endif
			this.FindAllControls();


			// eg: if one of these init'd productsGrid, then another can't reliably subscribe to it
			Configure_BackupCounts();
			Configure_ScanAuto();
			Configure_ScanNotification();
			Configure_VisibleBooks();
			Configure_QuickFilters();
			Configure_ScanManual();
			Configure_RemoveBooks();
			Configure_Liberate();
			Configure_Export();
			Configure_Settings();
			Configure_ProcessQueue();
			Configure_Filter();
			// misc which belongs in winforms app but doesn't have a UI element
			Configure_NonUI();

			_viewModel.ProductsDisplay.InitialLoaded += ProductsDisplay_Initialized;
			_viewModel.ProductsDisplay.RemovableCountChanged += ProductsDisplay_RemovableCountChanged;
			_viewModel.ProductsDisplay.VisibleCountChanged += ProductsDisplay_VisibleCountChanged;

			{
				this.LibraryLoaded += MainWindow_LibraryLoaded;

				LibraryCommands.LibrarySizeChanged += async (_, _) => await _viewModel.ProductsDisplay.DisplayBooks(DbContexts.GetLibrary_Flat_NoTracking(includeParents: true));
				Closing += (_,_) => this.SaveSizeAndLocation(Configuration.Instance);
			}
			Opened += MainWindow_Opened;
			Closing += MainWindow_Closing;
		}

		private void MainWindow_Closing(object sender, System.ComponentModel.CancelEventArgs e)
		{
			productsDisplay?.CloseImageDisplay();
		}

		private async void MainWindow_Opened(object sender, EventArgs e)
		{
#if !DEBUG
			if (App.IsWindows)
			{
				try
				{
					await Task.Run(checkForAndDownloadUpdate);
				}
				catch(Exception ex)
				{
					Serilog.Log.Logger.Error(ex, "An error occured while checking for app updates.");
					return;
				}
			}
#endif
		}

		private async Task checkForAndDownloadUpdate()
		{
			AppScaffolding.UpgradeProperties upgradeProperties;
			try
			{
				upgradeProperties = AppScaffolding.LibationScaffolding.GetLatestRelease(@"Libation\.\d+\.\d+\.\d+-win-avalonia.zip");

				if (upgradeProperties is null)
					return;
			}
			catch (Exception ex)
			{
				Serilog.Log.Logger.Error(ex, "Failed to check for update");
				return;
			}

			if (upgradeProperties.ZipUrl is null)
			{
				Serilog.Log.Logger.Information("Download link for new version not found");
				return;
			}

			//Silently download the update in the background, ave it to a temp file.

			var zipPath = System.IO.Path.GetTempFileName();
			try
			{
				System.Net.Http.HttpClient cli = new();
				using (var fs = System.IO.File.OpenWrite(zipPath))
				{
					using (var dlStream = await cli.GetStreamAsync(new Uri(upgradeProperties.ZipUrl)))
						await dlStream.CopyToAsync(fs);
				}
			}
			catch (Exception ex)
			{
				Serilog.Log.Logger.Error(ex, "Failed to download the update: {pdate}", upgradeProperties.ZipUrl);
				return;
			}

			var result = MessageBox.Show($"{upgradeProperties.HtmlUrl}\r\n\r\nWould you like to upgrade now?", "New version available", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button1);

			if (result != DialogResult.Yes)
				return;

			var thisExe = System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName;
			var thisDir = System.IO.Path.GetDirectoryName(thisExe);

			var args = $"--input {zipPath} --output {thisDir} --executable {thisExe}";

			var zipExtractor = System.IO.Path.Combine(System.IO.Path.GetTempPath(), "ZipExtractor.exe");

			System.IO.File.Copy("ZipExtractor.exe", zipExtractor, overwrite: true);

			var psi = new System.Diagnostics.ProcessStartInfo()
			{
				FileName = zipExtractor,
				UseShellExecute = true,
				Verb = "runas",
				WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal,
				Arguments = args,
				CreateNoWindow = true
			};

			System.Diagnostics.Process.Start(psi);
			Environment.Exit(0);		
		}

		public void ProductsDisplay_Initialized1(object sender, EventArgs e)
		{
			if (sender is ProductsDisplay products)
				_viewModel.ProductsDisplay.RegisterCollectionChanged(products);
		}

		private void MainWindow_LibraryLoaded(object sender, List<LibraryBook> dbBooks)
		{
			_viewModel.ProductsDisplay.InitialDisplay(dbBooks);
		}

		private void InitializeComponent()
		{
			AvaloniaXamlLoader.Load(this);
		}

		public void OnLoad() => Load?.Invoke(this, EventArgs.Empty);
		public void OnLibraryLoaded(List<LibraryBook> initialLibrary) => LibraryLoaded?.Invoke(this, initialLibrary);

		private void FindAllControls()
		{
			quickFiltersToolStripMenuItem = this.FindControl<MenuItem>(nameof(quickFiltersToolStripMenuItem));
			productsDisplay = this.FindControl<ProductsDisplay>(nameof(productsDisplay));
		}

		protected override void OnDataContextChanged(EventArgs e)
		{
			base.OnDataContextChanged(e);
		}
	}
}