package org.apache.maven.plugins.pdf;
   
   /*
    * 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.
   */
  
  import java.io.File;
  import java.io.IOException;
  import java.io.Reader;
  import java.io.Writer;
  import java.util.Locale;
  import java.util.Map;
  
  import org.apache.maven.doxia.document.DocumentTOC;
  import org.apache.maven.doxia.document.DocumentTOCItem;
  import org.codehaus.plexus.util.ReaderFactory;
  import org.codehaus.plexus.util.WriterFactory;
  import org.kopitubruk.util.json.IndentPadding;
  import org.kopitubruk.util.json.JSONConfig;
  import org.kopitubruk.util.json.JSONParser;
  import org.kopitubruk.util.json.JSONUtil;
  
  /**
   * Helper to save then reload TOC content (to a json file), to be able to aggregate TOCs.
   * 
   * @author anthony-beurive
   * @since 1.5
   */
  class TocFileHelper
  {
      private static final String FILENAME = "toc.json";
  
      static void saveTOC( File workingDirectory, DocumentTOC toc, Locale locale )
          throws IOException
      {
          // FIXME: manage locales.
          JSONConfig jsonConfig = new JSONConfig();
          jsonConfig.setIndentPadding( new IndentPadding( "  ", "\n" ) );
          jsonConfig.addReflectClass( DocumentTOC.class );
          jsonConfig.addReflectClass( DocumentTOCItem.class );
  
          try ( Writer writer = WriterFactory.newWriter( getTocFile( workingDirectory ), "UTF-8" ) )
          {
              JSONUtil.toJSON( toc, jsonConfig, writer );
          }
      }
  
      static Map<String, Object> loadToc( File workingDirectory )
          throws IOException
      {
          try ( Reader reader = ReaderFactory.newReader( getTocFile( workingDirectory ), "UTF-8" ) )
          {
              return (Map) JSONParser.parseJSON( reader );
          }
      }
  
      private static File getTocFile( File workingDirectory )
      {
          return new File( workingDirectory, FILENAME );
      }
  }