Renamed Katteker.Gui to Katteker.UserInterface.

Katteker.Gui/UserInterface.cs

@@ -0,0 +1,63 @@
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using Katteker.Properties;
+
+namespace Katteker
+{
+    /// <summary>
+    ///     The wrapper to add Katteker-capability to older Programs.
+    /// </summary>
+    public static class UserInterface
+    {
+        private static UpdateManager _manager;
+
+        /// <summary>
+        ///     Checks for Updates.
+        /// </summary>
+        /// <returns>Task</returns>
+        public static Task CheckForUpdateAsync() => CheckForUpdateAsync(false);
+
+        /// <summary>
+        ///     Checks for Updates.
+        /// </summary>
+        /// <param name="isStartup">Is this Method called on Startup of the Program.</param>
+        /// <returns>Task</returns>
+        public static async Task CheckForUpdateAsync(bool isStartup)
+        {
+            if (_manager == null && !UpdateManager.TryCreate(out _manager))
+            {
+                if (!isStartup)
+                {
+                    MessageBox.Show(Resources.SquirrelWrapper_CheckForUpdate,
+                        Resources.SquirrelWrapper_CheckForUpdate_Error, MessageBoxButtons.OK, MessageBoxIcon.Error);
+                }
+
+                return;
+            }
+
+            var releases = (await _manager.CheckForUpdateAsync().ConfigureAwait(false)).ToArray();
+            if (releases.Any() || !isStartup)
+            {
+                var thread = new Thread(ThreadProcess);
+                thread.SetApartmentState(ApartmentState.STA);
+                thread.Start(releases.LastOrDefault());
+                thread.Join();
+            }
+        }
+
+        private static void ThreadProcess(object argument)
+        {
+            var entry = (ReleaseEntry) argument;
+            using (var window = new UpdateWindow(_manager, entry))
+            {
+                var dialogResult = window.ShowDialog();
+                if (dialogResult == DialogResult.OK)
+                {
+                    _manager.RestartApp();
+                }
+            }
+        }
+    }
+}