/*
    * 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.digglike.business;
  
  import fr.paris.lutece.portal.service.image.ImageResource;
  import fr.paris.lutece.portal.service.plugin.Plugin;
  import fr.paris.lutece.util.sql.DAOUtil;
  
  
  /**
   * This class provides Data Access methods for Field objects
   */
  public final class ImageResourceDAO implements IImageResourceDAO
  {
      // Constants
      private static final String SQL_QUERY_NEW_PK = "SELECT max( id_resource_image ) FROM digglike_image";
      private static final String SQL_QUERY_FIND_BY_PRIMARY_KEY = "SELECT image_content, image_mime_type" +
          " FROM digglike_image WHERE id_resource_image = ?";
      private static final String SQL_QUERY_INSERT = "INSERT INTO digglike_image (id_resource_image, image_content, image_mime_type) VALUES (?,?,?)";
      private static final String SQL_QUERY_DELETE = "DELETE FROM digglike_image WHERE id_resource_image = ? ";
  
      @Override
      public synchronized int insert( ImageResource imageResource, Plugin plugin )
      {
          DAOUtil daoUtil = new DAOUtil( SQL_QUERY_INSERT, plugin );
          daoUtil.setBytes( 2, imageResource.getImage(  ) );
          daoUtil.setString( 3, imageResource.getMimeType(  ) );
  
          int nId = newPrimaryKey( plugin );
          daoUtil.setInt( 1, nId );
          daoUtil.executeUpdate(  );
          daoUtil.free(  );
  
          return nId;
      }
  
      @Override
      public ImageResource load( int nId, Plugin plugin )
      {
          DAOUtil daoUtil = new DAOUtil( SQL_QUERY_FIND_BY_PRIMARY_KEY, plugin );
          daoUtil.setInt( 1, nId );
          daoUtil.executeQuery(  );
  
          ImageResource imageResource = null;
  
          if ( daoUtil.next(  ) )
          {
              imageResource = new ImageResource(  );
              imageResource.setImage( daoUtil.getBytes( 1 ) );
              imageResource.setMimeType( daoUtil.getString( 2 ) );
          }
  
          daoUtil.free(  );
  
          return imageResource;
      }
  
      @Override
      public void delete( int nId, Plugin plugin )
      {
          DAOUtil daoUtil = new DAOUtil( SQL_QUERY_DELETE, plugin );
          daoUtil.setInt( 1, nId );
          daoUtil.executeUpdate(  );
          daoUtil.free(  );
      }
  
      /**
      * generate new primary key
     * @param plugin plugin
     * @return
     */
     private int newPrimaryKey( Plugin plugin )
     {
         DAOUtil daoUtil = new DAOUtil( SQL_QUERY_NEW_PK, plugin );
         daoUtil.executeQuery(  );
 
         int nKey;
 
         if ( !daoUtil.next(  ) )
         {
             // if the table is empty
             nKey = 1;
         }
 
         nKey = daoUtil.getInt( 1 ) + 1;
         daoUtil.free(  );
 
         return nKey;
     }
 }