using System;
using System.Collections;
using System.ComponentModel;
using System.Web;
using System.Web.SessionState;
using System.IO;
using System.Xml;

namespace Repository 
{
	/// <summary>
	/// <p>Generated.<br/>
	/// Methods modified or created:<ul>
	/// <li>Application_BeginRequest</li>
	/// <li>restore</li>
	/// <li>saveSubRep</li>
	/// <li>saveArchRep</li></ul>
	/// <p>Copyright (c) 2002 Alexis Grandemange<br/>
	/// Mail: alexis.grandemange@pagebox.net</p>
	/// <pre>This program is free software; you can redistribute it and/or
	/// modify it under the terms of the GNU Lesser General Public
	/// License as published by the Free Software Foundation; version
	/// 2.1 of the License.
	/// This library is distributed in the hope that it will be useful,
	/// but WITHOUT ANY WARRANTY; without even the implied warranty of
	/// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	/// GNU Lesser General Public License for more details.
	/// A copy of the GNU Lesser General Public License lesser.txt should be
	/// included in the distribution.</pre>
	/// </summary>
	public class Global : System.Web.HttpApplication
	{
		/// <summary>
		/// Subscriber list.
		/// </summary>
		public static RepoSubs subRep;
		/// <summary>
		/// Archive list.
		/// </summary>
		public static RepoArchs archRep;
		/// <summary>
		/// Physical path (where subscribers.xml and archives.xml are stored)
		/// </summary>
		public static string path;
		/// <summary>
		/// True if RepoSubs and RepoArchs are initialized.
		/// </summary>
		public static bool isInitialized = false;
		protected void Application_Start(Object sender, EventArgs e)
		{
		}
		/// <summary>
		/// Restores RepoSubs and RepoArchs.
		/// </summary>
		private static void restore()
		{
			if (File.Exists(path + "\\subscribers.xml")) 
			{
				XmlTextReader r = new XmlTextReader(path + "\\subscribers.xml");
				r.WhitespaceHandling = WhitespaceHandling.None;
				r.Read();
				if (r.NodeType == XmlNodeType.XmlDeclaration)
					subRep = new RepoSubs(r);
				else
					subRep = new RepoSubs();
				r.Close();
			} 
			else
				subRep = new RepoSubs();
			if (File.Exists(path + "\\archives.xml")) 
			{
				XmlTextReader r = new XmlTextReader(path + "\\archives.xml");
				r.WhitespaceHandling = WhitespaceHandling.None;
				r.Read();
				if (r.NodeType == XmlNodeType.XmlDeclaration)
					archRep = new RepoArchs(r);
				else
					archRep = new RepoArchs();
				r.Close();
			} 
			else
				archRep = new RepoArchs();
		}
 
		protected void Session_Start(Object sender, EventArgs e)
		{

		}

		/// <summary>
		/// Restores and initializes archRep and subRep.
		/// <p>Version 0.0.3: support for first invocation from repository/Webservices.</p>
		/// </summary>
		protected void Application_BeginRequest(Object sender, EventArgs e)
		{
			lock(typeof(Global)) 
			{
				if (!Global.isInitialized) 
				{
					string lpath = Request.ServerVariables["PATH_INFO"];
					string host = Request.ServerVariables["HTTP_HOST"];
					string port = Request.ServerVariables["SERVER_PORT"];
					path = Request.ServerVariables["PATH_TRANSLATED"];
					int pos = lpath.LastIndexOf("/");
					lpath = lpath.Substring(0, pos);	// Repository directory
					pos = lpath.LastIndexOf("/");
					int ppos = path.LastIndexOf("\\");
					path = path.Substring(0, ppos);	// Repository physical directory
					string dir = lpath.Substring(pos + 1);
					if (dir.Equals("WebServices") || dir.Equals("webservices")) 
					{
						lpath = lpath.Substring(0, pos);
						pos = lpath.LastIndexOf("/");
						ppos = path.LastIndexOf("\\");
						path = path.Substring(0, ppos);	// Repository physical directory
					}
					lpath = lpath.Substring(0, pos + 1) + "download/";	// download directory
					string url;
					if (port.Equals("80"))
						url = host + lpath;
					else
						url = host + ":" + port + lpath;
					pos = path.LastIndexOf("\\");
					string dpath = path.Substring(0, pos + 1) + "download\\";
					restore();
					Global.subRep.init(url, Global.archRep);
					Global.archRep.init(url, Global.subRep, dpath);
					Global.isInitialized = true;
				}
			}
		}

		protected void Application_EndRequest(Object sender, EventArgs e)
		{

		}

		protected void Session_End(Object sender, EventArgs e)
		{

		}

		protected void Application_End(Object sender, EventArgs e)
		{
		}
		/// <summary>
		/// Saves subRep (subscriber list).
		/// Called by RepoArch and RepoSubs when the subscriber list is updated.
		/// </summary>
		public static void saveSubRep() 
		{
			lock(typeof(Global)) 
			{
				XmlTextWriter w = new XmlTextWriter (path + "\\subscribers.xml", null);
				w.Formatting = Formatting.Indented;
				w.WriteStartDocument();
				subRep.WriteXml(w);
				w.WriteEndDocument();
				w.Close();
			}
		}
		/// <summary>
		/// Saves archRep (archive list).
		/// Called by RepoArch and RepoSubs when the subscriber list is updated.
		/// </summary>
		public static void saveArchRep()
		{ 
			lock(typeof(Global)) 
			{
				XmlTextWriter w = new XmlTextWriter (path + "\\archives.xml", null);
				w.Formatting = Formatting.Indented;
				w.WriteStartDocument();
				archRep.WriteXml(w);
				w.WriteEndDocument();
				w.Close();
			}
		}
	}
}