chris@1: /* chris@1: * SONEWS News Server chris@1: * see AUTHORS for the list of contributors chris@1: * chris@1: * This program is free software: you can redistribute it and/or modify chris@1: * it under the terms of the GNU General Public License as published by chris@1: * the Free Software Foundation, either version 3 of the License, or chris@1: * (at your option) any later version. chris@1: * chris@1: * This program is distributed in the hope that it will be useful, chris@1: * but WITHOUT ANY WARRANTY; without even the implied warranty of chris@1: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the chris@1: * GNU General Public License for more details. chris@1: * chris@1: * You should have received a copy of the GNU General Public License chris@1: * along with this program. If not, see . chris@1: */ chris@1: package org.sonews.daemon.command; chris@1: chris@1: import java.io.IOException; chris@1: import java.util.List; cli@17: import java.util.regex.Matcher; cli@17: import java.util.regex.Pattern; cli@17: import java.util.regex.PatternSyntaxException; chris@1: import org.sonews.daemon.NNTPConnection; cli@48: import org.sonews.storage.Group; chris@3: import org.sonews.storage.StorageBackendException; cli@17: import org.sonews.util.Log; chris@1: chris@1: /** chris@1: * Class handling the LIST command. chris@1: * @author Christian Lins chris@1: * @author Dennis Schwerdel chris@1: * @since n3tpd/0.1 chris@1: */ cli@49: public class ListCommand implements Command { chris@1: cli@37: @Override cli@49: public String[] getSupportedCommandStrings() { cli@49: return new String[]{"LIST"}; cli@37: } chris@1: cli@37: @Override cli@49: public boolean hasFinished() { cli@37: return true; cli@37: } chris@3: cli@37: @Override cli@49: public String impliedCapability() { cli@37: return null; cli@37: } cli@20: cli@37: @Override cli@49: public boolean isStateful() { cli@37: return false; cli@37: } cli@12: cli@37: @Override cli@37: public void processLine(NNTPConnection conn, final String line, byte[] raw) cli@49: throws IOException, StorageBackendException { cli@37: final String[] command = line.split(" "); chris@1: cli@37: if (command.length >= 2) { cli@37: if (command[1].equalsIgnoreCase("OVERVIEW.FMT")) { cli@37: conn.println("215 information follows"); cli@37: conn.println("Subject:\nFrom:\nDate:\nMessage-ID:\nReferences:\nBytes:\nLines:\nXref"); cli@37: conn.println("."); cli@37: } else if (command[1].equalsIgnoreCase("NEWSGROUPS")) { cli@37: conn.println("215 information follows"); cli@48: final List list = Group.getAll(); cli@48: for (Group g : list) { cli@37: conn.println(g.getName() + "\t" + "-"); cli@37: } cli@37: conn.println("."); cli@37: } else if (command[1].equalsIgnoreCase("SUBSCRIPTIONS")) { cli@37: conn.println("215 information follows"); cli@37: conn.println("."); cli@37: } else if (command[1].equalsIgnoreCase("EXTENSIONS")) { cli@37: conn.println("202 Supported NNTP extensions."); cli@37: conn.println("LISTGROUP"); cli@37: conn.println("XDAEMON"); cli@37: conn.println("XPAT"); cli@37: conn.println("."); cli@37: } else if (command[1].equalsIgnoreCase("ACTIVE")) { cli@37: String pattern = command.length == 2 cli@49: ? null : command[2].replace("*", "\\w*"); cli@37: printGroupInfo(conn, pattern); cli@37: } else { cli@37: conn.println("500 unknown argument to LIST command"); cli@37: } cli@37: } else { cli@37: printGroupInfo(conn, null); cli@37: } cli@37: } cli@37: cli@37: private void printGroupInfo(NNTPConnection conn, String pattern) cli@49: throws IOException, StorageBackendException { cli@48: final List groups = Group.getAll(); cli@37: if (groups != null) { cli@37: conn.println("215 list of newsgroups follows"); cli@48: for (Group g : groups) { cli@37: try { cli@37: Matcher matcher = pattern == null cli@49: ? null : Pattern.compile(pattern).matcher(g.getName()); cli@37: if (!g.isDeleted() cli@49: && (matcher == null || matcher.find())) { cli@37: String writeable = g.isWriteable() ? " y" : " n"; cli@37: // Indeed first the higher article number then the lower cli@37: conn.println(g.getName() + " " + g.getLastArticleNumber() + " " cli@49: + g.getFirstArticleNumber() + writeable); cli@37: } cli@37: } catch (PatternSyntaxException ex) { cli@37: Log.get().info(ex.toString()); cli@37: } cli@37: } cli@37: conn.println("."); cli@37: } else { cli@37: conn.println("500 server backend malfunction"); cli@37: } cli@37: } chris@1: }