Playing with Snackbar

Example/MainWindowViewModel.cs

@@ -1,23 +1,47 @@
-using System.Threading.Tasks;
+using System;
+using System.Linq;
+using System.Threading.Tasks;
 using System.Windows.Input;
+using MaterialDesignThemes.Wpf;
 using Prism.Commands;
 using Prism.Mvvm;
 
 namespace Example
 {
     [JetBrains.Annotations.UsedImplicitly]
-    public class MainWindowViewModel : BindableBase
+    public class MainWindowViewModel : BindableBase, IDisposable
     {
         public MainWindowViewModel()
         {
             UpdateCommand = new DelegateCommand<string>(async x => await UpdateAsync(x).ConfigureAwait(false));
         }
 
-        private Task UpdateAsync(string startup) =>
-            bool.TryParse(startup, out var isStartup)
-                ? Katteker.UserInterface.CheckForUpdateAsync(isStartup)
-                : Task.FromResult(true);
+        private async Task UpdateAsync(string startup)
+        {
+            var silent = !bool.Parse(startup);
+            try
+            {
+                var manager = Katteker.UpdateManager.Create();
+                var releases = await manager.CheckForUpdateAsync();
+                MessageQueue.Enqueue(releases.Any() ? "Update available" : "No Update available.", true);
+
+            }
+            catch (Exception e)
+            {
+                if (silent)
+                {
+                    MessageQueue.Enqueue(e.Message);
+                }
+            }
+        }
 
         public ICommand UpdateCommand { get; }
+
+        public SnackbarMessageQueue MessageQueue { get; } = new SnackbarMessageQueue();
+
+        public void Dispose()
+        {
+            MessageQueue?.Dispose();
+        }
     }
 }