/*

  * Copyright 2008 the original author or authors.

  *

  * Licensed under the Apache License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  *      http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.mockftpserver.fake.command;

 import org.mockftpserver.core.command.Command;

 import org.mockftpserver.core.command.ReplyCodes;

 import org.mockftpserver.core.session.Session;

 import org.mockftpserver.core.util.StringUtil;

 import java.util.Arrays;

 import java.util.List;

 /**

  * CommandHandler for the HELP command. Handler logic:

  * <ol>

  * <li>If the optional command-name parameter is specified, then reply with 214 along with the

  * help text configured for that command (or empty if none)</li>

  * <li>Otherwise, reply with 214 along with the configured default help text that has been configured

  * (or empty if none)</li>

  * </ol>

  * <p/>

  * The help text is configured within the {@link org.mockftpserver.fake.FakeFtpServer}.

  *

  * @author Chris Mair

  * @version $Revision: 182 $ - $Date: 2008-11-30 21:37:49 -0500 (Sun, 30 Nov 2008) $

  * @see org.mockftpserver.fake.ServerConfiguration

  * @see org.mockftpserver.fake.FakeFtpServer

  */

 public class HelpCommandHandler extends AbstractFakeCommandHandler {

     protected void handle(Command command, Session session) {

         List parameters = Arrays.asList(command.getParameters());

         String key = StringUtil.join(parameters, " ");

         String help = getServerConfiguration().getHelpText(key);

         if (help == null) {

             sendReply(session, ReplyCodes.HELP_OK, "help.noHelpTextDefined", list(key));

         } else {

             sendReply(session, ReplyCodes.HELP_OK, "help", list(help));

         }

     }

 }