org/sonews/daemon/command/StatCommand.java
author cli
Sun, 29 Aug 2010 17:04:25 +0200
changeset 34 9f0b95aafaa3
parent 20 6ae5e4f8329b
permissions -rw-r--r--
Merge heads.
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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.storage.Article;
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import org.sonews.daemon.NNTPConnection;
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import org.sonews.storage.StorageBackendException;
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/**
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 * Implementation of the STAT command.
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 * @author Christian Lins
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 * @since sonews/0.5.0
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 */
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public class StatCommand 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[]{"STAT"};
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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 false;
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  }
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  // TODO: Method has various exit points => Refactor!
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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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    Article article = null;
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    if(command.length == 1)
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    {
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      article = conn.getCurrentArticle();
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      if(article == null)
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      {
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        conn.println("420 no current article has been selected");
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        return;
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      }
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    }
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    else if(command[1].matches(NNTPConnection.MESSAGE_ID_PATTERN))
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    {
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      // Message-ID
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      article = Article.getByMessageID(command[1]);
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      if (article == null)
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      {
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        conn.println("430 no such article found");
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        return;
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      }
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    }
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    else
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    {
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      // Message Number
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      try
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      {
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        long aid = Long.parseLong(command[1]);
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        article = conn.getCurrentChannel().getArticle(aid);
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      }
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      catch(NumberFormatException ex)
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      {
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        ex.printStackTrace();
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      }
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      catch(StorageBackendException ex)
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      {
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        ex.printStackTrace();
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      }
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      if (article == null)
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      {
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        conn.println("423 no such article number in this group");
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        return;
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      }
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      conn.setCurrentArticle(article);
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    }
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    conn.println("223 " + conn.getCurrentChannel().getIndexOf(article) + " "
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      + article.getMessageID()
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      + " article retrieved - request text separately");
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  }
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}