/Code/Client/Inbox2/Core/Threading/Tasks/Application/CheckForUpdateTask.cs

using System;

using System.IO;

using System.Linq;

using System.Net;

using System.Xml.Linq;

using Inbox2.Core.Configuration;

using Inbox2.Core.Threading.Repeat;

using Inbox2.Framework;

using Inbox2.Framework.Interfaces.Enumerations;

using Inbox2.Framework.Threading;

using Inbox2.Framework.VirtualMailBox.Entities;

using Inbox2.Platform.Logging;

using Microsoft.Win32;



namespace Inbox2.Core.Threading.Tasks.Application

{

	public class CheckForUpdateTask : BackgroundTask

	{

		public override bool RequiresNetworkConnection

		{

			get { return true; }

		}



		string AssetBaseUrl

		{

			get

			{

				return String.Format("http://download{0}.inbox2.com/",

				   String.IsNullOrEmpty(CommandLine.Current.Environment) ? String.Empty : "." + CommandLine.Current.Environment);				

			}

		}		



		protected override void ExecuteCore()

		{

			string versionString;



			if (CheckNeedsUpgrade(out versionString))

				DownloadUpdate(versionString);



			//DownloadRssUpdates("Twitter", "http://twitter.com/statuses/user_timeline/16018665.rss");

			//DownloadRssUpdates("Blog", "http://feeds.feedburner.com/inbox2");

			//DownloadRssUpdates("Facebook", "http://www.facebook.com/feeds/page.php?format=rss20&id=82632103211");



			EventBroker.Publish(AppEvents.UpdateCheckFinished);

		}		



		public bool CheckNeedsUpgrade(out string versionString)

		{

			var wc = new WebClient();

			var currentVersion = GetType().Assembly.GetName().Version;

			var clientId = SettingsManager.ClientSettings.AppConfiguration.ClientId;



			versionString = wc.DownloadString(AssetBaseUrl + String.Format("version/latest?clientId={0}&version={1}", clientId, currentVersion));



			return (new Version(versionString) > currentVersion);

		}



		void DownloadUpdate(string versionString)

		{

			Logger.Debug("Starting download of upgrade archive", LogSource.BackgroundTask);



			var wc = new WebClient();

			var filename = Path.GetTempFileName();

			string url;



			if (String.IsNullOrEmpty(CommandLine.Current.Environment))

				url = String.Format("http://cdn.inbox2.com/client/x86/upgrade {0}.zip", versionString);

			else

				url = String.Format("http://download.{0}.inbox2.com/client/x86/upgrade {1}.zip", CommandLine.Current.Environment, versionString);



			wc.DownloadFile(url, filename);



			RegistryKey key = Registry.CurrentUser.OpenSubKey("Software\\Inbox2\\Upgrade", true);



			if (key == null)

				key = Registry.CurrentUser.CreateSubKey("Software\\Inbox2\\Upgrade");



			key.SetValue("filename", filename);

			key.SetValue("version", GetType().Assembly.GetName().Version.ToString());

			key.Close();



			Logger.Debug("Finished download of upgrade archive", LogSource.BackgroundTask);

			Logger.Debug("Pending upgrade filename = {0}", LogSource.BackgroundTask, filename);

		}



		public override void OnCompleted()

		{

			// Schedule next execution

			new Run("UpdateCheck").After(60).Minutes().Call(Tasks.CheckForUpdate);



			base.OnCompleted();

		}

	}

}