/*

  *   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 org.sonews.storage.Article;

 import org.sonews.daemon.NNTPConnection;

 import org.sonews.storage.StorageBackendException;

 /**

  * Implementation of the STAT command.

  * @author Christian Lins

  * @since sonews/0.5.0

  */

 public class StatCommand implements Command

 {

   @Override

   public String[] getSupportedCommandStrings()

   {

     return new String[]{"STAT"};

   }

   @Override

   public boolean hasFinished()

   {

     return true;

   }

   @Override

   public String impliedCapability()

   {

     return null;

   }

   @Override

   public boolean isStateful()

   {

     return false;

   }

   // TODO: Method has various exit points => Refactor!

   @Override

   public void processLine(NNTPConnection conn, final String line, byte[] raw)

     throws IOException, StorageBackendException

   {

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

     Article article = null;

     if(command.length == 1)

     {

       article = conn.getCurrentArticle();

       if(article == null)

       {

         conn.println("420 no current article has been selected");

         return;

       }

     }

     else if(command[1].matches(NNTPConnection.MESSAGE_ID_PATTERN))

     {

       // Message-ID

       article = Article.getByMessageID(command[1]);

       if (article == null)

       {

         conn.println("430 no such article found");

         return;

       }

     }

     else

     {

       // Message Number

       try

       {

         long aid = Long.parseLong(command[1]);

         article = conn.getCurrentChannel().getArticle(aid);

       }

       catch(NumberFormatException ex)

       {

         ex.printStackTrace();

       }

       catch(StorageBackendException ex)

       {

         ex.printStackTrace();

       }

       if (article == null)

       {

         conn.println("423 no such article number in this group");

         return;

       }

       conn.setCurrentArticle(article);

     }

     conn.println("223 " + conn.getCurrentChannel().getIndexOf(article) + " "

       + article.getMessageID()

       + " article retrieved - request text separately");

   }

 }