/*

 *   StarOffice 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 com.so.news.command;

import java.io.IOException;

import java.util.ArrayList;

import com.so.news.NNTPConnection;

import com.so.news.storage.Group;

/**

 * Class handling the LIST command.

 * @author Christian Lins

 * @author Dennis Schwerdel

 */

public class ListCommand extends Command

{

  public ListCommand(NNTPConnection conn)

  {

    super(conn);

  }

  public boolean process(String[] command) 

    throws Exception

  {

    if (command.length >= 2)

    {

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

      {

        printStatus(215, "information follows");

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

        return true;

      }

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

      {

        printStatus(215, "information follows");

        ArrayList<Group> list = Group.getAll();

        for (Group g : list)

        {

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

        }

        println(".");

        flush();

        return true;

      }

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

      {

        printStatus(215, "information follows");

        println(".");

        flush();

        return true;

      }

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

      {

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

        printTextLine("LISTGROUP");

        println(".");

        flush();

        return true;

      }

      return false;

    }

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

    for (Group g : Group.getAll())

    {

      //if(g.getEstimatedArticleCount() <= 0)

      //  continue;

      printTextLine(g.getName() + " " + g.getLastArticle() + " "

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

    }

    println(".");

    flush();

    return true;

  }

}