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.camel.kafkaconnector.maven.catalog.descriptor;
  
  import java.io.BufferedReader;
  import java.io.BufferedWriter;
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileWriter;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.nio.charset.StandardCharsets;
  import java.util.Arrays;
  import java.util.stream.Stream;
  
  import org.apache.commons.io.FileUtils;
  import org.apache.maven.plugin.AbstractMojo;
  import org.apache.maven.plugins.annotations.Mojo;
  import org.apache.maven.plugins.annotations.Parameter;
  import org.apache.maven.project.MavenProject;
  
  /**
   * Updates connector.properties file
   */
  @Mojo(name = "update-descriptor-files", threadSafe = true)
  public class CollectConnectorDescriptorMojo extends AbstractMojo {
  
      /**
       * The maven project.
       */
      @Parameter(property = "project", required = true, readonly = true)
      protected MavenProject project;
  
      /**
       * The directory for connectors
       */
      @Parameter(defaultValue = "${project.directory}/../../connectors/")
      protected File connectorsDir;
  
      /**
       * The directory for catalog descriptors
       */
      @Parameter(defaultValue = "${project.directory}/../src/generated/resources/descriptors")
      protected File catalogDescriptorDir;
  
      /**
       * Execute goal.
       */
      @Override
      public void execute() {
          try {
              executeComponentsReadme();
          } catch (IOException e) {
              getLog().error("An error occurred while running camel-kakfa-connector-descriptor-maven-plugin:update-descriptor-files", e);
          }
      }
  
      protected void executeComponentsReadme() throws IOException {
          getLog().info("About to scan all projects in" + connectorsDir + " in order to gather descriptors files");
          if (connectorsDir != null && connectorsDir.isDirectory()) {
              File[] files = connectorsDir.listFiles();
              getLog().info("Found " + (files != null ? String.valueOf(files.length) : "0") + "directories:");
              if (files != null) {
                  Arrays.sort(files);
                  Stream.of(files).filter(f -> f.isDirectory()).forEach(f -> getLog().info(f.getPath()));
                  StringBuilder sb = new StringBuilder();
                  for (int i = 0; i < files.length; i++) {
                      File file = files[i];
                      if (file.isDirectory()) {
                          fillStringBuilderWithContentOf(sb, file, "src/generated/descriptors/connector-source.properties");
                          fillStringBuilderWithContentOf(sb, file, "src/generated/descriptors/connector-sink.properties");
                      }
                  }
                  File file = FileUtils.getFile(catalogDescriptorDir, "connectors.properties");
                  getLog().info("About to write descriptor to: " + catalogDescriptorDir);
                  if (!file.exists()) {
                      // Create the structure
                      File parent = file.getParentFile();
                      parent.mkdirs();
                  }
                  file.createNewFile();
                  try (BufferedWriter writer = new BufferedWriter(new FileWriter(file))) {
                      writer.write(sb.toString());
                  }
              }
          }
      }
  
      private void fillStringBuilderWithContentOf(StringBuilder sb, File file, String path) {
          File fileToRead = FileUtils.getFile(file, path);
          if (fileToRead.exists()) {
              try (BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(fileToRead), StandardCharsets.UTF_8))) {
                  String line = null;
                  while ((line = br.readLine()) != null) {
                      sb.append(line);
                      sb.append(System.lineSeparator());
                  }
              } catch (IOException e) {
                  e.printStackTrace();
              }
          }
      }
  }
  