/*
    * 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.rss.web.filter;
  
  import fr.paris.lutece.plugins.rss.business.RssGeneratedFileHome;
  import fr.paris.lutece.plugins.rss.service.RssGeneratorService;
  import fr.paris.lutece.portal.service.util.AppLogService;
  import fr.paris.lutece.portal.service.util.AppPathService;
  import fr.paris.lutece.portal.service.util.AppPropertiesService;
  
  import java.io.File;
  import java.io.IOException;
  
  import javax.servlet.Filter;
  import javax.servlet.FilterChain;
  import javax.servlet.FilterConfig;
  import javax.servlet.ServletException;
  import javax.servlet.ServletRequest;
  import javax.servlet.ServletResponse;
  import javax.servlet.http.HttpServletRequest;
  
  
  /**
   *
   * @author pierre
   */
  public class RssGeneratorFilter implements Filter
  {
      /**
       *
       * {@inheritDoc}
       */
      @Override
      public void destroy(  )
      {
          // nothing
      }
  
      /**
       *
       * {@inheritDoc}
       */
      @Override
      public void doFilter( ServletRequest servletRequest, ServletResponse response, FilterChain chain )
          throws IOException, ServletException
      {
          HttpServletRequest request = (HttpServletRequest) servletRequest;
   
          String strURI = request.getRequestURI(  );
          String strRssStorageRoot = AppPropertiesService.getProperty( RssGeneratorService.PROPERTY_RSS_STORAGE_FOLDER_PATH );
          strRssStorageRoot = ( strRssStorageRoot.endsWith( "/" ) ) ? strRssStorageRoot : ( strRssStorageRoot + "/" );
  
          String strRssName = strURI.substring( strURI.indexOf( strRssStorageRoot ) + strRssStorageRoot.length(  ) );
          String strRssPath = AppPathService.getPath( RssGeneratorService.PROPERTY_RSS_STORAGE_FOLDER_PATH, strRssName );
          File dirRSS = new File( strRssPath );
  
          if ( !dirRSS.exists(  ) )
          {
              AppLogService.info( "Requested RSS file '" + strRssName + "' not found in the file system." );
  
              if ( RssGeneratedFileHome.checkRssFileFileName( strRssName ) )
              {
                  AppLogService.info( "Requested RSS file '" + strRssName + "' exists. File regenerated inf file system" );
                  RssGeneratorService.generateAllRss(  );
              }
              else
              {
                  AppLogService.info( "Requested RSS file '" + strRssName + "' doesn't exist in database." );
             }
         }
 
         chain.doFilter( servletRequest, response );
     }
 
     /**
      *
      * {@inheritDoc}
      */
     @Override
     public void init( FilterConfig config ) throws ServletException
     {
         // nothing
     }
 }