More installer migration

Application/Update/UpdateCheck.cs

@@ -0,0 +1,64 @@
+using FeedCenter.Properties;
+using System;
+using System.Diagnostics;
+using System.IO;
+using System.Net;
+using System.Reflection;
+using System.Threading.Tasks;
+
+namespace FeedCenter.Update
+{
+    public static class UpdateCheck
+    {
+        public static VersionFile VersionFile { get; private set; }
+        public static string LocalInstallFile { get; private set; }
+
+        public static bool UpdateAvailable { get; private set; }
+
+        public static Version CurrentVersion
+        {
+            get { return Assembly.GetExecutingAssembly().GetName().Version; }
+        }
+
+        public static bool CheckForUpdate()
+        {
+            VersionFile = VersionFile.Load();
+
+            if (VersionFile == null)
+                return false;
+
+            var serverVersion = VersionFile.Version;
+            var localVersion = CurrentVersion;
+
+            UpdateAvailable = serverVersion > localVersion;
+
+            return true;
+        }
+
+        internal static async Task<bool> DownloadUpdate()
+        {
+            if (VersionFile == null)
+                return false;
+
+            var remoteFile = Settings.Default.VersionLocation + VersionFile.InstallFile;
+
+            LocalInstallFile = Path.Combine(Path.GetTempPath(), VersionFile.InstallFile);
+
+            var webClient = new WebClient();
+
+            await webClient.DownloadFileTaskAsync(new Uri(remoteFile), LocalInstallFile);
+
+            return true;
+        }
+
+        internal static bool InstallUpdate()
+        {
+            if (VersionFile == null)
+                return false;
+
+            Process.Start(LocalInstallFile, "/passive");
+
+            return true;
+        }
+    }
+}

Application/Update/VersionFile.cs

@@ -0,0 +1,49 @@
+using Common.Debug;
+using FeedCenter.Properties;
+using System;
+using System.Xml.Linq;
+
+namespace FeedCenter.Update
+{
+    public class VersionFile
+    {
+        public Version Version { get; set; }
+        public string InstallFile { get; set; }
+        public DateTime InstallCreated { get; set; }
+
+        public static VersionFile Load()
+        {
+            try
+            {
+                var document = XDocument.Load(Settings.Default.VersionLocation + Settings.Default.VersionFile);
+
+                var versionInformationElement = document.Element("versionInformation");
+
+                if (versionInformationElement == null)
+                    return null;
+
+                var versionElement = versionInformationElement.Element("version");
+                var installFileElement = versionInformationElement.Element("installFile");
+                var installCreatedElement = versionInformationElement.Element("installCreated");
+
+                if (versionElement == null || installFileElement == null || installCreatedElement == null)
+                    return null;
+
+                var versionFile = new VersionFile
+                {
+                    Version = Version.Parse(versionElement.Value),
+                    InstallFile = installFileElement.Value,
+                    InstallCreated = DateTime.Parse(installCreatedElement.Value)
+                };
+
+                return versionFile;
+            }
+            catch (Exception exception)
+            {
+                Tracer.WriteException(exception);
+
+                return null;
+            }
+        }
+    }
+}