/*

  *   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.sql.SQLException;

 import java.util.List;

 import org.sonews.daemon.NNTPConnection;

 import org.sonews.daemon.storage.Group;

 /**

  * Class handling the LIST command.

  * @author Christian Lins

  * @author Dennis Schwerdel

  * @since n3tpd/0.1

  */

 public class ListCommand extends AbstractCommand

 {

   public ListCommand(final NNTPConnection conn)

   {

     super(conn);

   }

   @Override

   public boolean hasFinished()

   {

     return true;

   }

   @Override

   public void processLine(final String line)

     throws IOException, SQLException

   {

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

     if (command.length >= 2)

     {

       if (command[1].equalsIgnoreCase("OVERVIEW.FMT"))

       {

         printStatus(215, "information follows");

         println("Subject:\nFrom:\nDate:\nMessage-ID:\nReferences:\nBytes:\nLines:\nXref");

         println(".");

       }

       else if (command[1].equalsIgnoreCase("NEWSGROUPS"))

       {

         printStatus(215, "information follows");

         final List<Group> list = Group.getAll();

         for (Group g : list)

         {

           println(g.getName() + "\t" + "-");

         }

         println(".");

       }

       else if (command[1].equalsIgnoreCase("SUBSCRIPTIONS"))

       {

         printStatus(215, "information follows");

         println(".");

       }

       else if (command[1].equalsIgnoreCase("EXTENSIONS"))

       {

         printStatus(202, "Supported NNTP extensions.");

         println("LISTGROUP");

         println(".");

       }

       else

       {

         printStatus(500, "unknown argument to LIST command");

       }

     }

     else

     {

       final List<Group> groups = Group.getAll();

       if(groups != null)

       {

         printStatus(215, "list of newsgroups follows");

         for (Group g : groups)

         {

           // Indeed first the higher article number then the lower

           println(g.getName() + " " + g.getLastArticleNumber() + " "

               + g.getFirstArticleNumber() + " y");

         }

         println(".");

       }

       else

       {

         printStatus(500, "server database malfunction");

       }

     }

   }

 }