/*

  *   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");

 	}

 }