content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.apache.kafka.shell.command;
  
  import org.apache.kafka.shell.InteractiveShell;
  import org.apache.kafka.shell.glob.GlobVisitor;
  import org.apache.kafka.shell.state.MetadataShellState;
  
  import net.sourceforge.argparse4j.inf.ArgumentParser;
  import net.sourceforge.argparse4j.inf.Namespace;
  
  import org.jline.reader.Candidate;
  
  import java.io.PrintWriter;
  import java.util.List;
  import java.util.Optional;
  
  /**
   * Implements the cd command.
   */
  public final class CdCommandHandler implements Commands.Handler {
      public static final Commands.Type TYPE = new CdCommandType();
  
      public static class CdCommandType implements Commands.Type {
          private CdCommandType() {
          }
  
          @Override
          public String name() {
              return "cd";
          }
  
          @Override
          public String description() {
              return "Set the current working directory.";
          }
  
          @Override
          public boolean shellOnly() {
              return true;
          }
  
          @Override
          public void addArguments(ArgumentParser parser) {
              parser.addArgument("target").
                  nargs("?").
                  help("The directory to change to.");
          }
  
          @Override
          public Commands.Handler createHandler(Namespace namespace) {
              return new CdCommandHandler(Optional.ofNullable(namespace.getString("target")));
          }
  
          @Override
          public void completeNext(
              MetadataShellState state,
              List<String> nextWords,
              List<Candidate> candidates
          ) throws Exception {
              if (nextWords.size() == 1) {
                  CommandUtils.completePath(state, nextWords.get(0), candidates);
              }
          }
      }
  
      private final Optional<String> target;
  
      public CdCommandHandler(Optional<String> target) {
          this.target = target;
      }
  
      @Override
      public void run(
          Optional<InteractiveShell> shell,
          PrintWriter writer,
          MetadataShellState state
      ) throws Exception {
          String effectiveTarget = target.orElse("/");
          new GlobVisitor(effectiveTarget, entryOption -> {
              if (entryOption.isPresent()) {
                  if (!entryOption.get().node().isDirectory()) {
                      writer.println("cd: " + effectiveTarget + ": not a directory.");
                  } else {
                      state.setWorkingDirectory(entryOption.get().absolutePath());
                  }
              } else {
                  writer.println("cd: " + effectiveTarget + ": no such directory.");
              }
          }).accept(state);
      }
  
      @Override
      public int hashCode() {
          return target.hashCode();
      }
  
      @Override
      public boolean equals(Object other) {
          if (!(other instanceof CdCommandHandler o)) return false;
          return o.target.equals(target);
      }
  }
  