content: /*
   * JBoss, Home of Professional Open Source
   * Copyright 2014 Red Hat Inc. and/or its affiliates and other contributors
   * as indicated by the @authors tag. All rights reserved.
   * See the copyright.txt in the distribution for a
   * full listing of individual contributors.
   *
   * 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.aesh.util.completer;
  
  import org.aesh.command.Command;
  import org.aesh.command.CommandDefinition;
  import org.aesh.command.CommandException;
  import org.aesh.command.CommandResult;
  import org.aesh.command.container.CommandContainer;
  import org.aesh.command.container.CommandContainerBuilder;
  import org.aesh.command.impl.container.AeshCommandContainerBuilder;
  import org.aesh.command.invocation.CommandInvocation;
  import org.aesh.command.option.Argument;
  import org.aesh.command.option.Option;
  import org.aesh.command.parser.CommandLineParserException;
  
  import java.io.IOException;
  import java.nio.file.Files;
  import java.nio.file.Paths;
  import java.nio.file.StandardOpenOption;
  
  /**
   * @author <a href="mailto:stale.pedersen@jboss.org">Ståle W. Pedersen</a>
   */
  @CommandDefinition(name = "completer", description = "Generates a complete file for a command for posix systems")
  public class CompleterCommand implements Command<CommandInvocation> {
  
      @Option(hasValue = false)
      private boolean help;
  
      @Argument(required = true, description = "Command class name")
      private String command;
  
      @Override
      public CommandResult execute(CommandInvocation commandInvocation) throws CommandException, InterruptedException {
          if(help) {
             commandInvocation.println(commandInvocation.getHelpInfo("completer"));
             return CommandResult.SUCCESS;
          }
          else {
                  Class<Command<CommandInvocation>> clazz = loadCommand(command);
                  if(clazz != null) {
                      CommandContainerBuilder<CommandInvocation> builder = new AeshCommandContainerBuilder<>();
                      try {
                          CommandContainer<CommandInvocation> container = builder.create(clazz);
  
                          FileCompleterGenerator completerGenerator = new FileCompleterGenerator();
  
                          Files.write(Paths.get(container.getParser().getProcessedCommand().name().toLowerCase()+"_complete.bash"),
                                  completerGenerator.generateCompleterFile(container.getParser()).getBytes(), StandardOpenOption.CREATE);
  
                      }
                      catch(CommandLineParserException | IOException e) {
                          e.printStackTrace();
                      }
                  }
                  else
                      commandInvocation.println("Could not load command: "+command);
          }
  
          return CommandResult.SUCCESS;
      }
  
      @SuppressWarnings("unchecked")
      private Class<Command<CommandInvocation>> loadCommand(String commandName) {
          try {
              return (Class<Command<CommandInvocation>>) Class.forName(commandName);
          }
          catch(ClassNotFoundException | ClassCastException e) {
              e.printStackTrace();
          }
  
          return null;
      }
  
  }
  