/*

 *   SONEWS News Server

 *   see AUTHORS for the list of contributors

 *

 *   This program is free software: you can redistribute it and/or modify

 *   it under the terms of the GNU General Public License as published by

 *   the Free Software Foundation, either version 3 of the License, or

 *   (at your option) any later version.

 *

 *   This program 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 General Public License for more details.

 *

 *   You should have received a copy of the GNU General Public License

 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

package org.sonews.web;

import java.io.IOException;

import java.util.HashSet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.sonews.util.StringTemplate;

/**

 * Servlet that shows the Peers and the Peering Rules.

 * @author Christian Lins

 * @since sonews/0.5.0

 */

public class SonewsPeerServlet extends AbstractSonewsServlet

{

  private static final long serialVersionUID = 245345346356L;

  @Override

  public void doGet(HttpServletRequest req, HttpServletResponse resp)

    throws IOException

  {

    synchronized(this)

    {

      connectToNewsserver();

      StringTemplate tmpl = getTemplate("SonewsPeerServlet.tmpl");

      // Read peering rules from newsserver

      printlnToNewsserver("XDAEMON LIST PEERINGRULES");

      String line = readlnFromNewsserver();

      if(!line.startsWith("200 "))

      {

        throw new IOException("Unexpected reply: " + line);

      }

      // Create FEED_RULES String

      HashSet<String> peers        = new HashSet<String>();

      StringBuilder   feedRulesStr = new StringBuilder();

      for(;;)

      {

        line = readlnFromNewsserver();

        if(line.equals("."))

        {

          break;

        }

        else

        {

          feedRulesStr.append(line);

          feedRulesStr.append("<br/>");

          String[] lineChunks = line.split(" ");

          peers.add(lineChunks[1]);

        }

      }

      // Create PEERS string

      StringBuilder peersStr = new StringBuilder();

      for(String peer : peers)

      {

        peersStr.append(peer);

        peersStr.append("<br/>");

      }

      // Set server name

      tmpl.set("PEERS", peersStr.toString());

      tmpl.set("PEERING_RULES", feedRulesStr.toString());

      tmpl.set("SERVERNAME", hello.split(" ")[2]);

      tmpl.set("TITLE", "Peers");

      resp.getWriter().println(tmpl.toString());

      resp.getWriter().flush();

      resp.setStatus(HttpServletResponse.SC_OK);

      disconnectFromNewsserver();

    }

  }

}