/*

  *   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.util.List;

 import org.sonews.daemon.NNTPConnection;

 import org.sonews.storage.Channel;

 import org.sonews.storage.StorageBackendException;

 /**

  * Class handling the LISTGROUP command.

  * @author Christian Lins

  * @author Dennis Schwerdel

  * @since n3tpd/0.1

  */

 public class ListGroupCommand implements Command

 {

 	@Override

 	public String[] getSupportedCommandStrings()

 	{

 		return new String[] {"LISTGROUP"};

 	}

 	@Override

 	public boolean hasFinished()

 	{

 		return true;

 	}

 	@Override

 	public String impliedCapability()

 	{

 		return null;

 	}

 	@Override

 	public boolean isStateful()

 	{

 		return false;

 	}

 	@Override

 	public void processLine(NNTPConnection conn, final String commandName, byte[] raw)

 		throws IOException, StorageBackendException

 	{

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

 		Channel group;

 		if (command.length >= 2) {

 			group = Channel.getByName(command[1]);

 		} else {

 			group = conn.getCurrentChannel();

 		}

 		if (group == null) {

 			conn.println("412 no group selected; use GROUP <group> command");

 			return;

 		}

 		List<Long> ids = group.getArticleNumbers();

 		conn.println("211 " + ids.size() + " "

 			+ group.getFirstArticleNumber() + " "

 			+ group.getLastArticleNumber() + " list of article numbers follow");

 		for (long id : ids) {

 			// One index number per line

 			conn.println(Long.toString(id));

 		}

 		conn.println(".");

 	}

 }