src/org/sonews/daemon/command/GroupCommand.java
author cli
Tue Jun 07 11:55:22 2011 +0200 (2011-06-07)
changeset 44 5d7d1adf387f
parent 35 ed84c8bdd87b
child 48 b78e77619152
permissions -rwxr-xr-x
Work on hsqldb support
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/*
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 *   SONEWS News Server
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 *   see AUTHORS for the list of contributors
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 *
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 *   This program is free software: you can redistribute it and/or modify
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 *   it under the terms of the GNU General Public License as published by
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 *   the Free Software Foundation, either version 3 of the License, or
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 *   (at your option) any later version.
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 *
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 *   This program is distributed in the hope that it will be useful,
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 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *   GNU General Public License for more details.
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 *
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 *   You should have received a copy of the GNU General Public License
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 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
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 */
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package org.sonews.daemon.command;
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import java.io.IOException;
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import org.sonews.daemon.NNTPConnection;
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import org.sonews.storage.Channel;
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import org.sonews.storage.StorageBackendException;
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/**
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 * Class handling the GROUP command.
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 * <pre>
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 *  Syntax
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 *    GROUP group
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 *
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 *  Responses
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 *    211 number low high group     Group successfully selected
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 *    411                           No such newsgroup
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 *
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 *  Parameters
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 *    group     Name of newsgroup
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 *    number    Estimated number of articles in the group
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 *    low       Reported low water mark
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 *    high      Reported high water mark
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 * </pre>
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 * (from RFC 3977)
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 * 
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 * @author Christian Lins
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 * @author Dennis Schwerdel
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 * @since n3tpd/0.1
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 */
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public class GroupCommand implements Command
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{
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	@Override
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	public String[] getSupportedCommandStrings()
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	{
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		return new String[] {"GROUP"};
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	}
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	@Override
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	public boolean hasFinished()
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	{
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		return true;
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	}
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	@Override
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	public String impliedCapability()
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	{
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		return null;
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	}
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	@Override
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	public boolean isStateful()
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	{
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		return true;
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	}
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	@Override
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	public void processLine(NNTPConnection conn, final String line, byte[] raw)
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		throws IOException, StorageBackendException
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	{
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		final String[] command = line.split(" ");
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		Channel group;
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		if (command.length >= 2) {
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			group = Channel.getByName(command[1]);
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			if (group == null || group.isDeleted()) {
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				conn.println("411 no such news group");
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			} else {
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				conn.setCurrentGroup(group);
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				conn.println("211 " + group.getPostingsCount() + " " + group.getFirstArticleNumber()
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					+ " " + group.getLastArticleNumber() + " " + group.getName() + " group selected");
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			}
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		} else {
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			conn.println("500 no group name given");
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		}
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	}
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}