/*
    * 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.directories.web;
  
  import fr.paris.lutece.plugins.directories.business.DirectoryResponse;
  import fr.paris.lutece.plugins.directories.business.DirectoryResponseHome;
  import fr.paris.lutece.plugins.directories.util.DirectoriesUtils;
  import fr.paris.lutece.plugins.genericattributes.business.Response;
  import fr.paris.lutece.plugins.genericattributes.business.ResponseHome;
  import fr.paris.lutece.portal.business.file.File;
  import fr.paris.lutece.portal.business.file.FileHome;
  import fr.paris.lutece.portal.business.physicalfile.PhysicalFile;
  import fr.paris.lutece.portal.business.physicalfile.PhysicalFileHome;
  import fr.paris.lutece.portal.service.message.AdminMessage;
  import fr.paris.lutece.portal.service.message.AdminMessageService;
  import fr.paris.lutece.portal.service.util.AppLogService;
  import fr.paris.lutece.util.filesystem.FileSystemUtil;
  import java.io.IOException;
  import java.io.OutputStream;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  /**
   *
   * class DoDownloadGraph
   *
   */
  public final class DoDownloadFile
  {
      private static final String PARAMETER_ID_FILE = "id_file";
      private static final String PARAMETER_ID_RESPONSE = "id_response";
      private static final String MESSAGE_ERROR_DURING_DOWNLOAD_FILE = "error";
  
      /**
       * Private constructor
       */
      private DoDownloadFile( )
      {
      }
  
      /**
       * 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 )
      {
          String strIdFile = request.getParameter( PARAMETER_ID_FILE );
          int nIdFile = Integer.parseInt( strIdFile );
          String strIdResponse = request.getParameter( PARAMETER_ID_RESPONSE );
          int nIdResponse = Integer.parseInt( strIdResponse );
          DirectoryResponse directoryResponse = DirectoryResponseHome.getDirectoryResponsesListByIdResponse( nIdResponse );
          if ( directoryResponse != null )
          {
              Response genAttResponse = ResponseHome.findByPrimaryKey( directoryResponse.getIdResponse( ) );
              if ( genAttResponse.getFile( ) != null && genAttResponse.getFile( ).getIdFile( ) == nIdFile )
              {
                  File file = FileHome.findByPrimaryKey( nIdFile );
                  PhysicalFile physicalFile = ( file != null ) ? PhysicalFileHome.findByPrimaryKey( file.getPhysicalFile( ).getIdPhysicalFile( ) ) : null;
                  if ( physicalFile != null )
                  {
                      try
                      {
                         byte [ ] byteFileOutPut = physicalFile.getValue( );
                         DirectoriesUtils.addHeaderResponse( response, file.getTitle( ) );
                         String strMimeType = file.getMimeType( );
                         if ( strMimeType == null )
                         {
                             strMimeType = FileSystemUtil.getMIMEType( file.getTitle( ) );
                         }
                         response.setContentType( strMimeType );
                         response.setContentLength( 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 );
     }
 }