Initial commit

Katteker.Gui/Wrapper.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using Katteker.Gui.Properties;
+
+namespace Katteker.Gui
+{
+    /// <summary>
+    ///     The wrapper to add Squirrel-capability to older Programs.
+    /// </summary>
+    public static class Wrapper
+    {
+        /// <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)
+        {
+            using (var window = new UpdateWindow())
+            {
+                var dialogResult = DialogResult.Cancel;
+                if (!UpdateManager.TryCreate(out var manager) && !isStartup)
+                {
+                    MessageBox.Show(Resources.SquirrelWrapper_CheckForUpdate,
+                        Resources.SquirrelWrapper_CheckForUpdate_Error, MessageBoxButtons.OK, MessageBoxIcon.Error);
+                    return;
+                }
+
+                var releases = (await manager.CheckForUpdateAsync().ConfigureAwait(true)).ToArray();
+                window.UpdateManager = manager;
+                window.ReleaseEntry = releases.LastOrDefault();
+                if (isStartup)
+                {
+                    if (releases?.Any() == true)
+                    {
+                        dialogResult = window.ShowDialog();
+                    }
+                }
+                else
+                {
+                    dialogResult = window.ShowDialog();
+                }
+
+
+                if (dialogResult == DialogResult.OK)
+                {
+                    manager.RestartApp();
+                }
+            }
+        }
+    }
+}