Libation/Source/LibationAvalonia/Dialogs/AboutDialog.axaml.cs

using LibationAvalonia.Controls;
using LibationAvalonia.ViewModels;
using AppScaffolding;
using LibationFileManager;
using LibationUiBase;
using LibationUiBase.Forms;
using ReactiveUI;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace LibationAvalonia.Dialogs;

public partial class AboutDialog : DialogWindow
{
	private readonly AboutVM _viewModel;
	public AboutDialog() : base(saveAndRestorePosition: false)
	{
		InitializeComponent();

		DataContext = _viewModel = new AboutVM();
	}

	private async void CheckForUpgrade_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
	{
		var mainWindow = Owner as Views.MainWindow;

		var upgrader = new Upgrader();
		upgrader.DownloadProgress += async (_, e) => await Avalonia.Threading.Dispatcher.UIThread.InvokeAsync(() => mainWindow?.ViewModel?.DownloadProgress = e.ProgressPercentage);
		upgrader.DownloadCompleted += async (_, _) => await Avalonia.Threading.Dispatcher.UIThread.InvokeAsync(() => mainWindow?.ViewModel?.DownloadProgress = null);

		_viewModel.CanCheckForUpgrade = false;
		Version? latestVersion = null;
		var result = await upgrader.CheckForUpgradeAsync(OnUpgradeAvailable);

		_viewModel.CanCheckForUpgrade = true;
		_viewModel.UpgradeButtonText = result.Outcome switch
		{
			VersionCheckOutcome.UpToDate => "Libation is up to date. Check Again.",
			VersionCheckOutcome.UnableToDetermine => "Unable to check for updates. Try again later.",
			VersionCheckOutcome.UpdateAvailable when result.UpgradeProperties is { } p => $"Version {p.LatestRelease:3} is available",
			_ => "Check for Upgrade"
		};

		async Task OnUpgradeAvailable(UpgradeEventArgs e)
		{
			var notificationResult = await new UpgradeNotificationDialog(e.UpgradeProperties, e.CapUpgrade).ShowDialogAsync(this);

			e.Ignore = notificationResult == DialogResult.Ignore;
			e.InstallUpgrade = notificationResult == DialogResult.OK;
			latestVersion = e.UpgradeProperties.LatestRelease;
		}
	}

	private void ContributorLink_Tapped(object sender, Avalonia.Input.TappedEventArgs e)
	{
		if (sender is LinkLabel lbl && lbl.DataContext is LibationContributor contributor)
		{
			Dinah.Core.Go.To.Url(contributor.Link.AbsoluteUri);
		}
	}

	private void Link_getlibation(object sender, Avalonia.Input.TappedEventArgs e) => Dinah.Core.Go.To.Url(AppScaffolding.LibationScaffolding.WebsiteUrl);

	private void ViewReleaseNotes_Tapped(object sender, Avalonia.Input.TappedEventArgs e)
		=> Dinah.Core.Go.To.Url($"{AppScaffolding.LibationScaffolding.RepositoryUrl}/releases/tag/v{AppScaffolding.LibationScaffolding.BuildVersion.ToVersionString()}");
}

public class AboutVM : ViewModelBase
{
	public string Version { get; }
	public bool CanCheckForUpgrade { get => field; set => this.RaiseAndSetIfChanged(ref field, value); } = true;
	public string UpgradeButtonText { get => field; set => this.RaiseAndSetIfChanged(ref field, value); } = "Check for Upgrade";

	public IEnumerable<LibationContributor> PrimaryContributors => LibationContributor.PrimaryContributors;
	public IEnumerable<LibationContributor> AdditionalContributors => LibationContributor.AdditionalContributors;

	public AboutVM()
	{
		Version = $"Libation {AppScaffolding.LibationScaffolding.Variety} v{AppScaffolding.LibationScaffolding.BuildVersion}";
	}
}