chris@1: /*
chris@1:  *   SONEWS News Server
chris@1:  *   see AUTHORS for the list of contributors
chris@1:  *
chris@1:  *   This program is free software: you can redistribute it and/or modify
chris@1:  *   it under the terms of the GNU General Public License as published by
chris@1:  *   the Free Software Foundation, either version 3 of the License, or
chris@1:  *   (at your option) any later version.
chris@1:  *
chris@1:  *   This program is distributed in the hope that it will be useful,
chris@1:  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
chris@1:  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
chris@1:  *   GNU General Public License for more details.
chris@1:  *
chris@1:  *   You should have received a copy of the GNU General Public License
chris@1:  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
chris@1:  */
chris@1: 
chris@1: package org.sonews.daemon.command;
chris@1: 
chris@1: import java.io.IOException;
chris@1: import org.sonews.daemon.NNTPConnection;
chris@3: import org.sonews.storage.Channel;
chris@3: import org.sonews.storage.StorageBackendException;
chris@1: 
chris@1: /**
chris@1:  * Class handling the GROUP command.
chris@1:  * <pre>
chris@1:  *  Syntax
chris@1:  *    GROUP group
chris@1:  *
chris@1:  *  Responses
chris@1:  *    211 number low high group     Group successfully selected
chris@1:  *    411                           No such newsgroup
chris@1:  *
chris@1:  *  Parameters
chris@1:  *    group     Name of newsgroup
chris@1:  *    number    Estimated number of articles in the group
chris@1:  *    low       Reported low water mark
chris@1:  *    high      Reported high water mark
chris@1:  * </pre>
chris@1:  * (from RFC 3977)
chris@1:  * 
chris@1:  * @author Christian Lins
chris@1:  * @author Dennis Schwerdel
chris@1:  * @since n3tpd/0.1
chris@1:  */
chris@3: public class GroupCommand implements Command
chris@1: {
chris@1: 
cli@37: 	@Override
cli@37: 	public String[] getSupportedCommandStrings()
cli@37: 	{
cli@37: 		return new String[] {"GROUP"};
cli@37: 	}
chris@1: 
cli@37: 	@Override
cli@37: 	public boolean hasFinished()
cli@37: 	{
cli@37: 		return true;
cli@37: 	}
chris@3: 
cli@37: 	@Override
cli@37: 	public String impliedCapability()
cli@37: 	{
cli@37: 		return null;
cli@37: 	}
cli@20: 
cli@37: 	@Override
cli@37: 	public boolean isStateful()
cli@37: 	{
cli@37: 		return true;
cli@37: 	}
chris@1: 
cli@37: 	@Override
cli@37: 	public void processLine(NNTPConnection conn, final String line, byte[] raw)
cli@37: 		throws IOException, StorageBackendException
cli@37: 	{
cli@37: 		final String[] command = line.split(" ");
chris@1: 
cli@37: 		Channel group;
cli@37: 		if (command.length >= 2) {
cli@37: 			group = Channel.getByName(command[1]);
cli@37: 			if (group == null || group.isDeleted()) {
cli@37: 				conn.println("411 no such news group");
cli@37: 			} else {
cli@37: 				conn.setCurrentGroup(group);
cli@37: 				conn.println("211 " + group.getPostingsCount() + " " + group.getFirstArticleNumber()
cli@37: 					+ " " + group.getLastArticleNumber() + " " + group.getName() + " group selected");
cli@37: 			}
cli@37: 		} else {
cli@37: 			conn.println("500 no group name given");
cli@37: 		}
cli@37: 	}
chris@1: }