RSS Feed Aggregator and Blogging Smart Client

// Copyright � 2005 by Omar Al Zabir. All rights are reserved.
// 
// If you like this code then feel free to go ahead and use it.
// The only thing I ask is that you don't remove or alter my copyright notice.
//
// Your use of this software is entirely at your own risk. I make no claims or
// warrantees about the reliability or fitness of this code for any particular purpose.
// If you make changes or additions to this code please mark your code as being yours.
// 
// website http://www.oazabir.com, email OmarAlZabir@gmail.com, msn oazabir@hotmail.com

using System;
using System.Diagnostics;
using System.IO;
using System.Collections;
using System.Xml;
using System.Xml.Serialization;
using Microsoft.Practices.EnterpriseLibrary.Logging;

namespace RSSFeeder.Helpers
{
	using RSSCommon;
	using RSSCommon.Helper;
	using RSSBlogAPI;

	/// <summary>
	/// Helper class for storing/retrieving global configuration
	/// </summary>
	public class ConfigurationHelper
	{
		public const string CONFIGURATION_BACKUP_FILE = "ConfigurationBackup.xml";

		public static void CopyFiles()
		{
			#region Log
			Logger.Write("Copying files...");
			#endregion

			string exeFileName = Process.GetCurrentProcess().MainModule.FileName;
			DateTime exeDateTime = File.GetLastWriteTime( exeFileName );

			// 1. Create the default XSLT file
			Configuration.Instance.XSLFileName = Path.Combine( ApplicationSettings.ApplicationDataPath, "default.xslt" );
			if( !File.Exists( Configuration.Instance.XSLFileName ) || File.GetLastWriteTime( Configuration.Instance.XSLFileName ) < exeDateTime )
				SerializationHelper.WriteEmbeddedFile( "default.xslt", Configuration.Instance.XSLFileName );

			// 2. Copy the java script file
			//string jsFilePath = Path.Combine( ApplicationSettings.ApplicationDataPath, "fix.js" );
			//SerializationHelper.WriteEmbeddedFile( "RSSFeeder.Resources.fix.js", jsFilePath );

			// 3. Copy newspaper XSL 
			Configuration.Instance.NewspaperXSL = Path.Combine( ApplicationSettings.ApplicationDataPath, "rss2html.xslt" );
			if( !File.Exists( Configuration.Instance.NewspaperXSL ) || File.GetLastWriteTime( Configuration.Instance.NewspaperXSL ) < exeDateTime )
				SerializationHelper.WriteEmbeddedFile( "rss2html.xslt", Configuration.Instance.NewspaperXSL );

			// 4. Copy outlook view XML
			Configuration.Instance.OutlookViewXmlPath = Path.Combine( ApplicationSettings.ApplicationDataPath, "RSSFeederView.xml" );
			if( !File.Exists( Configuration.Instance.OutlookViewXmlPath ) || File.GetLastWriteTime( Configuration.Instance.OutlookViewXmlPath ) < exeDateTime )
				SerializationHelper.WriteEmbeddedFile( "RSSFeederView.xml", Configuration.Instance.OutlookViewXmlPath );

			// 5. Copy outlook XSL
			Configuration.Instance.OutlookXSL = Path.Combine( ApplicationSettings.ApplicationDataPath, "outlook.xslt" );
			if( !File.Exists( Configuration.Instance.OutlookXSL ) || File.GetLastWriteTime( Configuration.Instance.OutlookXSL ) < exeDateTime )
				SerializationHelper.WriteEmbeddedFile( "outlook.xslt", Configuration.Instance.OutlookXSL );

			// 6. Atom to RSS Converter XSL
			Configuration.Instance.AtomToRssXsl= Path.Combine( ApplicationSettings.ApplicationDataPath, "atomtorss2.xslt" );
			if( !File.Exists( Configuration.Instance.AtomToRssXsl ) || File.GetLastWriteTime( Configuration.Instance.AtomToRssXsl ) < exeDateTime )
				SerializationHelper.WriteEmbeddedFile( "atomtorss2.xslt", Configuration.Instance.AtomToRssXsl );
		}

		public static void LoadGlobalSettings()
		{
			EntLibHelper.LoadConfiguration();
			
			// Try loading the web log configuration. For first time, it may fail, never mind
			try
			{
				WebLogProvider.LoadWebLogs();
			}
			catch
			{
			}
		
			// If this is the new installation, try restoring the old configuration
			if( Configuration.Instance.IsNewInstall )
			{
				string configPath = Path.Combine( ApplicationSettings.ApplicationDataPath, CONFIGURATION_BACKUP_FILE );
				if( File.Exists( configPath ) )
				{
					using( FileStream file = new FileStream( configPath, FileMode.Open ) )
					{
						Configuration oldConfig = (Configuration)SerializationHelper.Deserialize( file, typeof( Configuration ) );

						// Copy old config settings to new config
						SerializationHelper.CopyProperties( oldConfig, Configuration.Instance );
					}
				}

				Configuration.Instance.IsNewInstall = false;

				SaveGlobalSettings();
			}

			RSSCommon.PropertyEditor.PasswordEditor.PasswordProvider = new EntLibHelper();
			// Subscribe to change event so that whenever the configuration object changes, it is saved
			Configuration.Instance.PropertyChanged += new System.ComponentModel.PropertyChangedEventHandler(Instance_PropertyChanged);			
		}
		public static void SaveGlobalSettings()
		{
			EntLibHelper.Debug("Saving configuration", "");			
			EntLibHelper.SaveConfiguration();

			// 6. Copy the configuration file to application data in order to maintain a backup of it.
			// Next time when a new version comes, we need to get settings from this backup
			string configPath = Path.Combine( ApplicationSettings.ApplicationDataPath, CONFIGURATION_BACKUP_FILE );
			using( FileStream file = new FileStream( configPath, FileMode.Create ) )
			{
				SerializationHelper.Serialize( file, Configuration.Instance );
			}
			
			WebLogProvider.SaveWebLogs();
		}

		private static void Instance_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
		{
			if( Configuration.Instance.LoadAtStartup )
				RegistryHelper.RegisterAtStartup();
			else
				RegistryHelper.UnregisterAtStartup();

			SaveGlobalSettings();
		}
	}
}