/*
    * Copyright (c) 2002-2020, City of Paris
    * All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    *
    *  1. Redistributions of source code must retain the above copyright notice
   *     and the following disclaimer.
   *
   *  2. Redistributions in binary form must reproduce the above copyright notice
   *     and the following disclaimer in the documentation and/or other materials
   *     provided with the distribution.
   *
   *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
   *     contributors may be used to endorse or promote products derived from
   *     this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   * License 1.0
   */
  package fr.paris.lutece.plugins.jasper.service.export;
  
  import java.io.File;
  
  import javax.servlet.http.HttpServletRequest;
  
  import fr.paris.lutece.plugins.jasper.service.JasperFileLinkService;
  import fr.paris.lutece.portal.service.util.AppPathService;
  import fr.paris.lutece.portal.service.util.AppPropertiesService;
  import net.sf.jasperreports.engine.JRException;
  import net.sf.jasperreports.engine.JasperPrint;
  import net.sf.jasperreports.engine.export.FileHtmlResourceHandler;
  import net.sf.jasperreports.engine.export.HtmlExporter;
  import net.sf.jasperreports.engine.export.HtmlResourceHandler;
  import net.sf.jasperreports.export.SimpleExporterInput;
  import net.sf.jasperreports.export.SimpleHtmlExporterOutput;
  import net.sf.jasperreports.export.SimpleHtmlReportConfiguration;
  import net.sf.jasperreports.export.type.HtmlSizeUnitEnum;
  
  /**
   * This class generate a Jasper report in HTML format
   *
   */
  public class HtmlJasperRender extends AbstractDefaultJasperRender
  {
      private static final String FILE_TYPE = "html";
      private static final String SRC_TAG_IMAGE_PATH_PREFIX = "plugins/jasper/images/";
      private static final String SRC_TAG_IMAGE_PATH_SUFFIX = "{0}";
  
      /**
       * {@inheritDoc }
       */
      @Override
      public String getLink( String strReportId )
      {
          return null;
      }
  
      /**
       * Deletes the folder containing the images
       * 
       * @param imageFolder
       *            the directory
       */
      public static void delete( File imageFolder )
      {
          if ( imageFolder.exists( ) )
          {
              File [ ] listFiles = imageFolder.listFiles( );
  
              for ( int i = 0; i < listFiles.length; i++ )
              {
                  File file = listFiles [i];
  
                  if ( file.isDirectory( ) )
                  {
                      delete( file );
                  }
  
                  file.delete( );
              }
          }
      }
  
      /**
       * {@inheritDoc }
      */
     @Override
     public String getFileType( )
     {
         return FILE_TYPE;
     }
 
     /**
      * {@inheritDoc }
      */
     @Override
     protected byte [ ] getData( HttpServletRequest request, fr.paris.lutece.plugins.jasper.business.JasperReport report, JasperPrint jasperPrint )
             throws JRException
     {
 
         HtmlExporter exporter = new HtmlExporter( );
         StringBuffer sb = new StringBuffer( );
 
         SimpleHtmlReportConfiguration configuration = new SimpleHtmlReportConfiguration( );
         configuration.setWhitePageBackground( false );
         configuration.setSizeUnit( HtmlSizeUnitEnum.PIXEL );
         exporter.setConfiguration( configuration );
 
         // Save image Map to file system
         String strImageFolderPath = AppPropertiesService.getProperty( PROPERTY_IMAGES_FILES_PATH );
         String strAbsoluteImagePath = new StringBuffer( AppPathService.getWebAppPath( ) ).append( strImageFolderPath ).append( report.getUrl( ) )
                 .append( PATH_SEPARATOR ).append( JasperFileLinkService.INSTANCE.getKey( request ) ).toString( );
         File imageFolder = new File( strAbsoluteImagePath );
 
         if ( !imageFolder.exists( ) )
         {
             imageFolder.mkdirs( );
         }
 
         exporter.setExporterInput( new SimpleExporterInput( jasperPrint ) );
 
         SimpleHtmlExporterOutput exporterOutput = new SimpleHtmlExporterOutput( sb );
         HtmlResourceHandler imageHandler = new FileHtmlResourceHandler( imageFolder,
                 new StringBuffer( SRC_TAG_IMAGE_PATH_PREFIX ).append( report.getUrl( ) ).append( PATH_SEPARATOR )
                         .append( JasperFileLinkService.INSTANCE.getKey( request ) ).append( PATH_SEPARATOR ).append( SRC_TAG_IMAGE_PATH_SUFFIX ).toString( ) );
         exporterOutput.setImageHandler( imageHandler );
         exporter.setExporterOutput( exporterOutput );
 
         exporter.exportReport( );
 
         exporter.reset( );
 
         return sb.toString( ).getBytes( );
     }
 }