/*

 *   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.daemon.command;

import java.io.IOException;

import java.sql.SQLException;

import java.util.List;

import org.sonews.daemon.NNTPConnection;

import org.sonews.daemon.storage.Group;

/**

 * Class handling the LIST command.

 * @author Christian Lins

 * @author Dennis Schwerdel

 * @since n3tpd/0.1

 */

public class ListCommand extends AbstractCommand

{

  public ListCommand(final NNTPConnection conn)

  {

    super(conn);

  }

  @Override

  public boolean hasFinished()

  {

    return true;

  }

  @Override

  public void processLine(final String line)

    throws IOException, SQLException

  {

    final String[] command = line.split(" ");

    if (command.length >= 2)

    {

      if (command[1].equalsIgnoreCase("OVERVIEW.FMT"))

      {

        printStatus(215, "information follows");

        println("Subject:\nFrom:\nDate:\nMessage-ID:\nReferences:\nBytes:\nLines:\nXref");

        println(".");

      }

      else if (command[1].equalsIgnoreCase("NEWSGROUPS"))

      {

        printStatus(215, "information follows");

        final List<Group> list = Group.getAll();

        for (Group g : list)

        {

          println(g.getName() + "\t" + "-");

        }

        println(".");

      }

      else if (command[1].equalsIgnoreCase("SUBSCRIPTIONS"))

      {

        printStatus(215, "information follows");

        println(".");

      }

      else if (command[1].equalsIgnoreCase("EXTENSIONS"))

      {

        printStatus(202, "Supported NNTP extensions.");

        println("LISTGROUP");

        println(".");

      }

      else

      {

        printStatus(500, "unknown argument to LIST command");

      }

    }

    else

    {

      final List<Group> groups = Group.getAll();

      if(groups != null)

      {

        printStatus(215, "list of newsgroups follows");

        for (Group g : groups)

        {

          // Indeed first the higher article number then the lower

          println(g.getName() + " " + g.getLastArticleNumber() + " "

              + g.getFirstArticleNumber() + " y");

        }

        println(".");

      }

      else

      {

        printStatus(500, "server database malfunction");

      }

    }

  }

}