/*
    * 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.calendar.service;
  
  import fr.paris.lutece.plugins.calendar.business.Agenda;
  import fr.paris.lutece.plugins.calendar.web.Constants;
  import fr.paris.lutece.portal.service.resource.Resource;
  import fr.paris.lutece.portal.service.resource.ResourceLoader;
  import fr.paris.lutece.portal.service.util.AppException;
  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 fr.paris.lutece.util.filesystem.DirectoryNotFoundException;
  import fr.paris.lutece.util.filesystem.FileSystemUtil;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.IOException;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  import java.util.Properties;
  
  
  /**
   *  This loader fetches agendas stored in a property file
   */
  public class AgendaLoaderProperties implements ResourceLoader
  {
      private static final String PROPERTY_CALENDAR_FILES_PATH = "calendar.files.path";
      private static final String EXT_CALENDAR_FILES = ".properties";
      private static final String PROPERTY_NAME = "name";
      private static final String PROPERTY_EVENT_IMAGE = "event.image";
      private static final String PROPERTY_EVENT_PREFIX = "event.prefix";
      private static final String PROPERTY_LOADER_CLASS = "loader.class";
      private static final String PROPERTY_LOADER_PARAMETER = "loader.parameter";
      private String _strFilesPath;
  
      /**
       * A loader importing agenda in properties files
       */
      public AgendaLoaderProperties(  )
      {
          super(  );
          _strFilesPath = AppPropertiesService.getProperty( PROPERTY_CALENDAR_FILES_PATH );
      }
  
      /**
       * Get the agenda represented by property files
       * @return Return the agenda resources
       */
      public Collection<AgendaResource> getResources(  )
      {
          String strRootDirectory = AppPathService.getWebAppPath(  );
          List<AgendaResource> listPages = new ArrayList<AgendaResource>(  );
  
          try
          {
              List<File> listFiles = FileSystemUtil.getFiles( strRootDirectory, _strFilesPath );
  
              for ( File file : listFiles )
              {
                  String fileName = file.getName(  );
  
                  if ( fileName.endsWith( EXT_CALENDAR_FILES ) )
                  {
                      String strId = fileName.substring( 0, fileName.lastIndexOf( "." ) );
                     AgendaResource agenda = loadAgenda( file, strId );
                     listPages.add( agenda );
                 }
             }
         }
         catch ( DirectoryNotFoundException e )
         {
             throw new AppException( e.getMessage(  ), e );
         }
 
         return listPages;
     }
 
     /**
      * Get a resource by its Id
      * @param strId The resource Id
      * @return The resource
      */
     public Resource getResource( String strId )
     {
         Resource resource = null;
         String strFilePath = AppPathService.getPath( PROPERTY_CALENDAR_FILES_PATH, strId + EXT_CALENDAR_FILES );
         File file = new File( strFilePath );
 
         if ( file.exists(  ) )
         {
             resource = loadAgenda( file, strId );
         }
 
         return resource;
     }
 
     /**
      * Return the page
      * @return The agenda
      * @param strId The id
      * @param file The File to load
      */
     private AgendaResource loadAgenda( File file, String strId )
     {
         AgendaResource agenda = new AgendaResource(  );
         Properties properties = new Properties(  );
 
         try
         {
             FileInputStream is = new FileInputStream( file );
             properties.load( is );
 
             agenda.setId( strId );
             agenda.setName( properties.getProperty( PROPERTY_NAME ) );
             agenda.setEventImage( properties.getProperty( PROPERTY_EVENT_IMAGE ) );
             agenda.setEventPrefix( properties.getProperty( PROPERTY_EVENT_PREFIX ) );
             agenda.setLoaderClassName( properties.getProperty( PROPERTY_LOADER_CLASS ) );
             agenda.setLoaderParameter( properties.getProperty( PROPERTY_LOADER_PARAMETER ) );
 
             try
             {
                 AgendaLoader loader = (AgendaLoader) Class.forName( agenda.getLoaderClassName(  ) ).newInstance(  );
                 Agenda a = loader.load( agenda.getLoaderParameter(  ) );
 
                 if ( a != null )
                 {
                     a.setName( agenda.getName(  ) );
                     a.setKeyName( agenda.getId(  ) );
                     agenda.setAgenda( a );
                     agenda.setResourceType( AppPropertiesService.getProperty( Constants.PROPERTY_READ_ONLY ) );
                 }
             }
             catch ( ClassNotFoundException e )
             {
                 AppLogService.error( e.getMessage(  ), e );
             }
             catch ( IllegalAccessException e )
             {
                 AppLogService.error( e.getMessage(  ), e );
             }
             catch ( InstantiationException e )
             {
                 AppLogService.error( e.getMessage(  ), e );
             }
         }
         catch ( IOException e )
         {
             AppLogService.error( e.getMessage(  ), e );
         }
 
         return agenda;
     }
 }