org/sonews/daemon/command/GroupCommand.java
author cli
Wed, 12 Aug 2009 13:03:23 +0200
changeset 7 0b76e099eb96
parent 3 2fdc9cc89502
child 20 6ae5e4f8329b
permissions -rw-r--r--
PullFeeder sends an addition "MODE READER" to peers.
     1 /*
     2  *   SONEWS News Server
     3  *   see AUTHORS for the list of contributors
     4  *
     5  *   This program is free software: you can redistribute it and/or modify
     6  *   it under the terms of the GNU General Public License as published by
     7  *   the Free Software Foundation, either version 3 of the License, or
     8  *   (at your option) any later version.
     9  *
    10  *   This program is distributed in the hope that it will be useful,
    11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13  *   GNU General Public License for more details.
    14  *
    15  *   You should have received a copy of the GNU General Public License
    16  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17  */
    18 
    19 package org.sonews.daemon.command;
    20 
    21 import java.io.IOException;
    22 import org.sonews.daemon.NNTPConnection;
    23 import org.sonews.storage.Channel;
    24 import org.sonews.storage.StorageBackendException;
    25 
    26 /**
    27  * Class handling the GROUP command.
    28  * <pre>
    29  *  Syntax
    30  *    GROUP group
    31  *
    32  *  Responses
    33  *    211 number low high group     Group successfully selected
    34  *    411                           No such newsgroup
    35  *
    36  *  Parameters
    37  *    group     Name of newsgroup
    38  *    number    Estimated number of articles in the group
    39  *    low       Reported low water mark
    40  *    high      Reported high water mark
    41  * </pre>
    42  * (from RFC 3977)
    43  * 
    44  * @author Christian Lins
    45  * @author Dennis Schwerdel
    46  * @since n3tpd/0.1
    47  */
    48 public class GroupCommand implements Command
    49 {
    50 
    51   @Override
    52   public String[] getSupportedCommandStrings()
    53   {
    54     return new String[]{"GROUP"};
    55   }
    56 
    57   @Override
    58   public boolean hasFinished()
    59   {
    60     return true;
    61   }
    62 
    63   @Override
    64   public boolean isStateful()
    65   {
    66     return true;
    67   }
    68   
    69   @Override
    70   public void processLine(NNTPConnection conn, final String line, byte[] raw)
    71     throws IOException, StorageBackendException
    72   {
    73     final String[] command = line.split(" ");
    74 
    75     Channel group;
    76     if(command.length >= 2)
    77     {
    78       group = Channel.getByName(command[1]);
    79       if(group == null || group.isDeleted())
    80       {
    81         conn.println("411 no such news group");
    82       }
    83       else
    84       {
    85         conn.setCurrentGroup(group);
    86         conn.println("211 " + group.getPostingsCount() + " " + group.getFirstArticleNumber()
    87           + " " + group.getLastArticleNumber() + " " + group.getName() + " group selected");
    88       }
    89     }
    90     else
    91     {
    92       conn.println("500 no group name given");
    93     }
    94   }
    95 
    96 }