Rework updating process a bit

PamhagenSysCtrl/Dialogs/UpdateDialog.xaml.cs

@@ -1,17 +1,18 @@
 using PamhagenSysCtrl.Helpers;
+using System.IO;
 using System.Windows;
 
 namespace PamhagenSysCtrl.Dialogs {
     public partial class UpdateDialog : Window {
 
-        private readonly UpdateInstaller Installer;
+        private readonly string Url;
         private readonly CancellationTokenSource Cancellation = new();
 
-        public UpdateDialog(UpdateInstaller installer) {
-            Installer = installer;
+        public UpdateDialog(string version, string url, long size) {
+            Url = url;
             InitializeComponent();
-            VersionText.Text = installer.Version.ToString();
-            SizeText.Text = Math.Ceiling(installer.Size / 1024d / 1024d).ToString("N0");
+            VersionText.Text = version;
+            SizeText.Text = Math.Ceiling(size / 1024d / 1024d).ToString("N0");
         }
 
         private void OnClosed(object? sender, EventArgs evt) {
@@ -26,20 +27,15 @@ namespace PamhagenSysCtrl.Dialogs {
 
             try {
                 var progress = new Progress<double>(value => DownloadProgress.Value = value * 100);
-                var fileName = await UpdateService.DownloadInstallerAsync(Installer, App.TempPath, progress, Cancellation.Token);
+                var filename = Path.Combine(App.TempPath, $"PamhagenSysCtrl-{VersionText.Text}.msi");
+                await UpdateService.DownloadInstaller(Url, filename, progress, Cancellation.Token);
                 StatusText.Text = "Installer wird gestartet...";
-                UpdateService.StartInstaller(fileName);
+                UpdateService.StartInstaller(filename);
                 DialogResult = true;
             } catch (OperationCanceledException) {
                 // Closing the dialog cancels an active download.
             } catch (Exception exc) {
-                MessageBox.Show(
-                    this,
-                    $"Das Update konnte nicht installiert werden:\n\n{exc.Message}",
-                    "Update installieren",
-                    MessageBoxButton.OK,
-                    MessageBoxImage.Error
-                );
+                MessageBox.Show($"Das Update konnte nicht installiert werden:\n\n{exc.Message}", "Update installieren", MessageBoxButton.OK, MessageBoxImage.Error);
                 Description.Visibility = Visibility.Visible;
                 DownloadPanel.Visibility = Visibility.Collapsed;
                 InstallButton.IsEnabled = true;