/*
    * Copyright (c) 2002-2014, Mairie de 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.workflow.modules.fillingdirectory.web;
  
  import fr.paris.lutece.plugins.directory.business.File;
  import fr.paris.lutece.plugins.directory.business.PhysicalFile;
  import fr.paris.lutece.plugins.directory.utils.DirectoryUtils;
  import fr.paris.lutece.plugins.workflow.modules.fillingdirectory.service.FileHistoryService;
  import fr.paris.lutece.plugins.workflow.modules.fillingdirectory.service.FillingDirectoryPlugin;
  import fr.paris.lutece.plugins.workflow.modules.fillingdirectory.service.IFileHistoryService;
  import fr.paris.lutece.plugins.workflow.modules.fillingdirectory.service.IPhysicalFileHistoryService;
  import fr.paris.lutece.plugins.workflow.modules.fillingdirectory.service.PhysicalFileHistoryService;
  import fr.paris.lutece.portal.service.message.AdminMessage;
  import fr.paris.lutece.portal.service.message.AdminMessageService;
  import fr.paris.lutece.portal.service.plugin.Plugin;
  import fr.paris.lutece.portal.service.plugin.PluginService;
  import fr.paris.lutece.portal.service.spring.SpringContextService;
  import fr.paris.lutece.portal.service.util.AppLogService;
  
  import java.io.IOException;
  import java.io.OutputStream;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  
  /**
   *
   *  DoDownloadHistoryFile
   *
   */
  public final class DoDownloadHistoryFile
  {
      private static final String PARAMETER_ID_FILE = "id_file";
      private static final String MESSAGE_ERROR_DURING_DOWNLOAD_FILE = "directory.message.error_during_download_file";
  
      /**
       * Private constructor
       */
      private DoDownloadHistoryFile(  )
      {
      }
  
      /**
       * Write in the http response the file to upload
       * @param request the http request
       * @param response The http response
       * @return Error Message
       *
       */
      public static String doDownloadFile( HttpServletRequest request, HttpServletResponse response )
      {
          Plugin plugin = PluginService.getPlugin( FillingDirectoryPlugin.PLUGIN_NAME );
          String strIdFile = request.getParameter( PARAMETER_ID_FILE );
          int nIdFile = DirectoryUtils.convertStringToInt( strIdFile );
          IFileHistoryService fileHistoryService = SpringContextService.getBean( FileHistoryService.BEAN_SERVICE );
          IPhysicalFileHistoryService physicalFileHistoryService = SpringContextService.getBean( PhysicalFileHistoryService.BEAN_SERVICE );
          File file = fileHistoryService.findByPrimaryKey( nIdFile, plugin );
          PhysicalFile physicalFile = ( file != null )
              ? physicalFileHistoryService.findByPrimaryKey( file.getPhysicalFile(  ).getIdPhysicalFile(  ), plugin ) : null;
  
          if ( physicalFile != null )
          {
              try
              {
                  byte[] byteFileOutPut = physicalFile.getValue(  );
                  DirectoryUtils.addHeaderResponse( request, response, file.getTitle(  ) );
                  response.setContentType( file.getMimeType(  ) );
                 response.setContentLength( (int) byteFileOutPut.length );
 
                 OutputStream os = response.getOutputStream(  );
                 os.write( byteFileOutPut );
                 os.close(  );
             }
             catch ( IOException e )
             {
                 AppLogService.error( e );
             }
         }
 
         return AdminMessageService.getMessageUrl( request, MESSAGE_ERROR_DURING_DOWNLOAD_FILE, AdminMessage.TYPE_STOP );
     }
 }