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 java.util.List;
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 LIST command.
chris@1:  * @author Christian Lins
chris@1:  * @author Dennis Schwerdel
chris@1:  * @since n3tpd/0.1
chris@1:  */
chris@3: public class ListCommand implements Command
chris@1: {
chris@1: 
chris@3:   @Override
chris@3:   public String[] getSupportedCommandStrings()
chris@1:   {
chris@3:     return new String[]{"LIST"};
chris@1:   }
chris@1: 
chris@1:   @Override
chris@1:   public boolean hasFinished()
chris@1:   {
chris@1:     return true;
chris@1:   }
chris@3: 
chris@3:   @Override
chris@3:   public boolean isStateful()
chris@3:   {
chris@3:     return false;
chris@3:   }
chris@1:   
chris@1:   @Override
chris@3:   public void processLine(NNTPConnection conn, final String line, byte[] raw)
chris@3:     throws IOException, StorageBackendException
chris@1:   {
chris@1:     final String[] command = line.split(" ");
chris@1:     
chris@1:     if (command.length >= 2)
chris@1:     {
chris@1:       if (command[1].equalsIgnoreCase("OVERVIEW.FMT"))
chris@1:       {
chris@3:         conn.println("215 information follows");
chris@3:         conn.println("Subject:\nFrom:\nDate:\nMessage-ID:\nReferences:\nBytes:\nLines:\nXref");
chris@3:         conn.println(".");
chris@1:       }
chris@1:       else if (command[1].equalsIgnoreCase("NEWSGROUPS"))
chris@1:       {
chris@3:         conn.println("215 information follows");
chris@3:         final List<Channel> list = Channel.getAll();
chris@3:         for (Channel g : list)
chris@1:         {
chris@3:           conn.println(g.getName() + "\t" + "-");
chris@1:         }
chris@3:         conn.println(".");
chris@1:       }
chris@1:       else if (command[1].equalsIgnoreCase("SUBSCRIPTIONS"))
chris@1:       {
chris@3:         conn.println("215 information follows");
chris@3:         conn.println(".");
chris@1:       }
chris@1:       else if (command[1].equalsIgnoreCase("EXTENSIONS"))
chris@1:       {
chris@3:         conn.println("202 Supported NNTP extensions.");
chris@3:         conn.println("LISTGROUP");
chris@3:         conn.println("XDAEMON");
chris@3:         conn.println("XPAT");
chris@3:         conn.println(".");
chris@1:       }
chris@1:       else
chris@1:       {
chris@3:         conn.println("500 unknown argument to LIST command");
chris@1:       }
chris@1:     }
chris@1:     else
chris@1:     {
chris@3:       final List<Channel> groups = Channel.getAll();
chris@1:       if(groups != null)
chris@1:       {
chris@3:         conn.println("215 list of newsgroups follows");
chris@3:         for (Channel g : groups)
chris@1:         {
chris@3:           if(!g.isDeleted())
chris@3:           {
chris@3:             String writeable = g.isWriteable() ? " y" : " n";
chris@3:             // Indeed first the higher article number then the lower
chris@3:             conn.println(g.getName() + " " + g.getLastArticleNumber() + " "
chris@3:                 + g.getFirstArticleNumber() + writeable);
chris@3:           }
chris@1:         }
chris@3:         conn.println(".");
chris@1:       }
chris@1:       else
chris@1:       {
chris@3:         conn.println("500 server database malfunction");
chris@1:       }
chris@1:     }
chris@1:   }
chris@1: 
chris@1: }