Add Auto Updater [WIP] & remove UAC project

Wox.Core/Updater/UpdaterManager.cs

@@ -1,4 +1,11 @@
-using Squirrel;
+
+using System;
+using System.IO;
+using System.Windows.Forms;
+using System.Windows.Threading;
+using NAppUpdate.Framework;
+using NAppUpdate.Framework.Common;
+using NAppUpdate.Framework.Sources;
 
 namespace Wox.Core.Updater
 {
@@ -18,14 +25,82 @@ namespace Wox.Core.Updater
             }
         }
 
-        private UpdaterManager() { }
+        private UpdaterManager()
+        {
+            UpdateManager.Instance.UpdateSource = GetUpdateSource();
+        }
 
         public void CheckUpdate()
         {
-            using (var mgr = new UpdateManager("https://path/to/my/update/folder", "nuget-package-id", FrameworkVersion.Net45))
+            // Get a local pointer to the UpdateManager instance
+            UpdateManager updManager = UpdateManager.Instance;
+
+            updManager.BeginCheckForUpdates(asyncResult =>
             {
-                 mgr.UpdateApp();
+                if (asyncResult.IsCompleted)
+                {
+                    // still need to check for caught exceptions if any and rethrow
+                    ((UpdateProcessAsyncResult)asyncResult).EndInvoke();
+
+                    // No updates were found, or an error has occured. We might want to check that...
+                    if (updManager.UpdatesAvailable == 0)
+                    {
+                        MessageBox.Show("All is up to date!");
+                        return;
+                    }
+                }
+
+                updManager.BeginPrepareUpdates(result =>
+                {
+                    ((UpdateProcessAsyncResult)result).EndInvoke();
+
+                    // ApplyUpdates is a synchronous method by design. Make sure to save all user work before calling
+                    // it as it might restart your application
+                    // get out of the way so the console window isn't obstructed
+                    try
+                    {
+                        updManager.ApplyUpdates(true,false,true);
+                    }
+                    catch
+                    {
+                        // this.WindowState = WindowState.Normal;
+                        MessageBox.Show(
+                            "An error occurred while trying to install software updates");
+                    }
+
+                    updManager.CleanUp();
+                }, null);
+            }, null);
+        }
+
+        public void Reinstall()
+        {
+            UpdateManager.Instance.ReinstateIfRestarted();
+        }
+
+        private void OnPrepareUpdatesCompleted(bool obj)
+        {
+            UpdateManager updManager = UpdateManager.Instance;
+
+            DialogResult dr = MessageBox.Show(
+                    "Updates are ready to install. Do you wish to install them now?",
+                    "Software updates ready",
+                     MessageBoxButtons.YesNo);
+
+            if (dr == DialogResult.Yes)
+            {
+                // This is a synchronous method by design, make sure to save all user work before calling
+                // it as it might restart your application
+                updManager.ApplyUpdates(true,true,true);
             }
         }
+
+        private IUpdateSource GetUpdateSource()
+        {
+            // Normally this would be a web based source.
+            // But for the demo app, we prepare an in-memory source.
+            var source = new NAppUpdate.Framework.Sources.SimpleWebSource("http://127.0.0.1:8888/Update.xml");
+            return source;
+        }
     }
 }