package org.apache.maven.doxia.book.services.renderer;

 /*

  * 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.FileNotFoundException;

 import java.io.IOException;

 import java.io.Reader;

 import java.io.Writer;

 import org.apache.maven.doxia.Doxia;

 import org.apache.maven.doxia.book.BookDoxiaException;

 import org.apache.maven.doxia.book.context.BookContext;

 import org.apache.maven.doxia.book.model.BookModel;

 import org.apache.maven.doxia.book.model.Chapter;

 import org.apache.maven.doxia.book.model.Section;

 import org.apache.maven.doxia.book.services.renderer.docbook.DocBookBookSink;

 import org.apache.maven.doxia.parser.ParseException;

 import org.apache.maven.doxia.parser.manager.ParserNotFoundException;

 import org.apache.maven.doxia.sink.Sink;

 import org.codehaus.plexus.logging.AbstractLogEnabled;

 import org.codehaus.plexus.util.IOUtil;

 import org.codehaus.plexus.util.ReaderFactory;

 import org.codehaus.plexus.util.StringUtils;

 import org.codehaus.plexus.util.WriterFactory;

 /**

  * An implementation of <code>BookRenderer</code> for docbook

  *

  * @plexus.component role-hint="doc-book"

  * @author Eric Redmond

  * @version $Id: DocbookBookRenderer.java 1090706 2011-04-09 23:15:28Z hboutemy $

  */

 public class DocbookBookRenderer

     extends AbstractLogEnabled

     implements BookRenderer

 {

     /**

      * @plexus.requirement

      */

     private Doxia doxia;

     // ----------------------------------------------------------------------

     // BookRenderer Implementation

     // ----------------------------------------------------------------------

     /** {@inheritDoc} */

     public void renderBook( BookContext context )

         throws BookDoxiaException

     {

         BookModel book = context.getBook();

         if ( !context.getOutputDirectory().exists() )

         {

             if ( !context.getOutputDirectory().mkdirs() )

             {

                 throw new BookDoxiaException( "Could not make directory: "

                         + context.getOutputDirectory().getAbsolutePath() + "." );

             }

         }

         File bookFile = new File( context.getOutputDirectory(), book.getId() + ".xml" );

         Writer fileWriter;

         try

         {

             fileWriter = WriterFactory.newXmlWriter( bookFile );

         }

         catch ( IOException e )

         {

             throw new BookDoxiaException( "Error while opening file.", e );

         }

         // ----------------------------------------------------------------------

         // Create the Dockbook File

         // ----------------------------------------------------------------------

         // TODO: Write out TOC?

         DocBookBookSink sink = new DocBookBookSink( fileWriter );

         try

         {

             sink.book();

             // TODO: symmetrize bookHead?

             if ( StringUtils.isNotEmpty( book.getTitle() ) )

             {

                 sink.bookTitle();

                 sink.text( book.getTitle() );

                 sink.bookTitle_();

             }

             if ( StringUtils.isNotEmpty( book.getDate() ) )

             {

                 sink.bookDate();

                 sink.text( book.getDate() );

                 sink.bookDate_();

             }

             if ( StringUtils.isNotEmpty( book.getAuthor() ) )

             {

                 sink.bookAuthor();

                 sink.text( book.getAuthor() );

                 sink.bookAuthor_();

             }

             sink.bookHead_();

             for ( Chapter chapter : book.getChapters() )

             {

                 sink.chapter();

                 if ( StringUtils.isNotEmpty( chapter.getTitle() ) )

                 {

                     sink.chapterTitle();

                     sink.text( chapter.getTitle() );

                     sink.chapterTitle_();

                 }

                 renderChapter( chapter, context, sink );

                 sink.chapter_();

             }

             sink.book_();

         }

         finally

         {

             sink.flush();

             sink.close();

             IOUtil.close( fileWriter );

         }

     }

     /**

      * Write a chapter.

      *

      * @param writer the writer.

      * @param chapter the Chapter.

      * @param context the BookContext.

      * @param sink a Sink.

      * @throws BookDoxiaException if the chapter cannot be written.

      */

     private void renderChapter( Chapter chapter, BookContext context, Sink sink )

         throws BookDoxiaException

     {

         for ( Section section : chapter.getSections() )

         {

             renderSection( section, context, sink );

         }

     }

     /**

      * Write a section.

      *

      * @param writer the writer.

      * @param section the Section.

      * @param context the BookContext.

      * @param sink a Sink.

      * @throws BookDoxiaException if the section cannot be written.

      */

     private void renderSection( Section section, BookContext context, Sink sink )

         throws BookDoxiaException

     {

         BookContext.BookFile bookFile = (BookContext.BookFile) context.getFiles().get( section.getId() );

         if ( bookFile == null )

         {

             throw new BookDoxiaException( "No document that matches section with id=" + section.getId() + "." );

         }

         Reader reader = null;

         try

         {

             reader = ReaderFactory.newReader( bookFile.getFile(), context.getInputEncoding() );

             doxia.parse( reader, bookFile.getParserId(), sink );

         }

         catch ( ParserNotFoundException e )

         {

             throw new BookDoxiaException( "Parser not found: " + bookFile.getParserId() + ".", e );

         }

         catch ( ParseException e )

         {

             throw new BookDoxiaException(

                                           "Error while parsing document: " + bookFile.getFile().getAbsolutePath() + ".",

                                           e );

         }

         catch ( FileNotFoundException e )

         {

             throw new BookDoxiaException( "Could not find document: " + bookFile.getFile().getAbsolutePath() + ".", e );

         }

         catch ( IOException e )

         {

             throw new BookDoxiaException( "Error while rendering book: "

                       + bookFile.getFile().getAbsolutePath() + ".", e );

         }

         finally

         {

             IOUtil.close( reader );

         }

     }

 }