sonews-drupal: src/org/sonews/daemon/command/HelpCommand.java@b51ab80c7a9d

     1 /*

     2  *   SONEWS News Server

     3  *   see AUTHORS for the list of contributors

     4  *

     5  *   This program is free software: you can redistribute it and/or modify

     6  *   it under the terms of the GNU General Public License as published by

     7  *   the Free Software Foundation, either version 3 of the License, or

     8  *   (at your option) any later version.

     9  *

    10  *   This program is distributed in the hope that it will be useful,

    11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    13  *   GNU General Public License for more details.

    14  *

    15  *   You should have received a copy of the GNU General Public License

    16  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.

    17  */

    19 package org.sonews.daemon.command;

    21 import java.io.IOException;

    22 import java.util.Set;

    23 import org.sonews.daemon.CommandSelector;

    24 import org.sonews.daemon.NNTPConnection;

    25 import org.sonews.util.io.Resource;

    27 /**

    28  * This command provides a short summary of the commands that are

    29  * understood by this implementation of the server. The help text will

    30  * be presented as a multi-line data block following the 100 response

    31  * code (taken from RFC).

    32  * @author Christian Lins

    33  * @since sonews/0.5.0

    34  */

    35 public class HelpCommand implements Command

    36 {

    38 	@Override

    39 	public boolean hasFinished()

    40 	{

    41 		return true;

    42 	}

    44 	@Override

    45 	public String impliedCapability()

    46 	{

    47 		return null;

    48 	}

    50 	@Override

    51 	public boolean isStateful()

    52 	{

    53 		return true;

    54 	}

    56 	@Override

    57 	public String[] getSupportedCommandStrings()

    58 	{

    59 		return new String[] {"HELP"};

    60 	}

    62 	@Override

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

    64 		throws IOException

    65 	{

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

    67 		conn.println("100 help text follows");

    69 		if (line.length() <= 1) {

    70 			final String[] help = Resource.getAsString("helpers/helptext", true).split("\n");

    71 			for (String hstr : help) {

    72 				conn.println(hstr);

    73 			}

    75 			Set<String> commandNames = CommandSelector.getCommandNames();

    76 			for (String cmdName : commandNames) {

    77 				conn.println(cmdName);

    78 			}

    79 		} else {

    80 			Command cmd = CommandSelector.getInstance().get(command[1]);

    81 			if (cmd instanceof HelpfulCommand) {

    82 				conn.println(((HelpfulCommand) cmd).getHelpString());

    83 			} else {

    84 				conn.println("No further help information available.");

    85 			}

    86 		}

    88 		conn.println(".");

    89 	}

    90 }

author	František Kučera <franta-hg@frantovo.cz>
	Sun Oct 16 20:55:46 2011 +0200 (2011-10-16)
changeset 81	b51ab80c7a9d
parent 35	ed84c8bdd87b
permissions	-rwxr-xr-x