morphy.command.HelpCommand.java Source code

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Here is the source code for morphy.command.HelpCommand.java

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/*
 *   Morphy Open Source Chess Server
 *   Copyright (C) 2008-2010  http://code.google.com/p/morphy-chess-server/
 *
 *  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 morphy.command;

import morphy.service.CommandService;
import morphy.user.UserSession;
import morphy.utils.MorphyStringUtils;

import org.apache.commons.lang.StringUtils;

public class HelpCommand extends AbstractCommand {
    public HelpCommand() {
        super("help");
    }

    public void process(String arguments, UserSession userSession) {
        String argument = arguments.trim();

        if (argument.length() == 0) {
            StringBuilder result = new StringBuilder(1000);
            result.append("Help is available on the following commands:\n");
            result.append("(Type help commandName for help on the command)\n\n");
            int counter = 0;
            Command[] commands = CommandService.getInstance().getCommands();
            for (Command command : commands) {
                if (!command.willProcess(userSession))
                    continue;

                result.append(StringUtils.rightPad(command.getContext().getName(), 15));
                counter++;
                if (counter == 5) {
                    result.append("\n");
                    counter = 0;
                }
            }
            userSession.send(result.toString());
        } else {
            if (argument.contains(" ")) {
                userSession.send(getContext().getUsage());
                return;
            }

            Command command = CommandService.getInstance().getCommand(argument);
            if (command == null || !command.willProcess(userSession)) {
                userSession.send("No help avaliable on \"" + argument + "\".");
            } else {
                StringBuilder builder = new StringBuilder(200);
                builder.append("Help for " + command.getContext().getName() + "\n");
                builder.append("Usage: " + command.getContext().getUsage() + "\n");
                builder.append("Level: " + command.getContext().getUserLevel() + "\n");
                builder.append("Description:\n");
                builder.append(command.getContext().getHelp());

                StringBuilder postBuilder = new StringBuilder(200);
                postBuilder.append("\nAliases: "
                        + MorphyStringUtils.toDelimitedString(command.getContext().getAliases(), " ") + "\n");
                postBuilder.append("See Also: "
                        + MorphyStringUtils.toDelimitedString(command.getContext().getSeeAlso(), " ") + "\n");
                postBuilder.append("Last Modified By: " + command.getContext().getLastModifiedBy() + " on "
                        + command.getContext().getLastModifiedDate());

                builder.append(postBuilder.toString());
                userSession.send(builder.toString());
            }
        }

    }
}