/* 
    * Copyright (c) 2002-2022, 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.portal.service.fileimage;
  
  import javax.servlet.http.HttpServletRequest;
  
  import org.apache.commons.fileupload.FileItem;
  
  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.business.user.AdminUser;
  import fr.paris.lutece.portal.business.user.attribute.AdminUserFieldHome;
  import fr.paris.lutece.portal.service.admin.AdminUserService;
  import fr.paris.lutece.portal.service.file.FileService;
  import fr.paris.lutece.portal.service.file.FileServiceException;
  import fr.paris.lutece.portal.service.image.ImageResource;
  import fr.paris.lutece.portal.service.image.ImageResourceManager;
  import fr.paris.lutece.portal.service.image.ImageResourceProvider;
  import fr.paris.lutece.portal.service.init.LuteceInitException;
  import fr.paris.lutece.portal.service.util.AppLogService;
  import fr.paris.lutece.portal.web.LocalVariables;
  import fr.paris.lutece.util.file.FileUtil;
  
  /**
   * Service for AdminUser image attributes. Provide ImageResource management
   */
  public class FileImageService implements ImageResourceProvider
  {
      private static FileImageServicemage/FileImageService.html#FileImageService">FileImageService _singleton = new FileImageService( );
      private static final String IMAGE_RESOURCE_TYPE_ID = "core_attribute_img";
  
      /**
       * Creates a new instance of FileImgService
       */
      private FileImageService( )
      {
      }
  
      /**
       * Init
       *
       * @throws LuteceInitException
       *             if an error occurs
       */
      public static synchronized void init( )
      {
          getInstance( ).register( );
      }
  
      /**
       * Initializes the service
       */
      public void register( )
      {
          ImageResourceManager.registerProvider( this );
      }
  
      /**
       * Get the unique instance of the service
       *
       * @return The unique instance
       */
      public static FileImageService getInstance( )
      {
          return _singleton;
      }
 
     /**
      * Return the Resource id
      *
      * @param nIdResource
      *            The resource identifier
      * @return The Resource Image
      */
     public ImageResource getImageResource( int nIdResource )
     {
         
         if ( !isAuthorized( nIdResource ) ) return null;
         
         File file = FileHome.findByPrimaryKey( nIdResource );
 
         if ( ( file != null ) && ( file.getPhysicalFile( ) != null ) && FileUtil.hasImageExtension( file.getTitle( ) ) )
         {
             PhysicalFile physicalFile = PhysicalFileHome.findByPrimaryKey( file.getPhysicalFile( ).getIdPhysicalFile( ) );
             ImageResource/ImageResource.html#ImageResource">ImageResource imageResource = new ImageResource( );
             imageResource.setImage( physicalFile.getValue( ) );
             imageResource.setMimeType( file.getMimeType( ) );
 
             return imageResource;
         }
         
 
         return null;
     }
 
     /**
      * Return the Resource Type id
      *
      * @return The Resource Type Id
      */
     public String getResourceTypeId( )
     {
         return IMAGE_RESOURCE_TYPE_ID;
     }
 
     /**
      * check rights
      *
      * @param nIdResource
      * @return true if authorized
      */
     private static boolean isAuthorized(  int nIdResource  )
     {
         HttpServletRequest request = LocalVariables.getRequest( );
         AdminUser user = AdminUserService.getAdminUser( request );
 
         return ( user == null || !AdminUserFieldHome.existsWithFile( nIdResource ) );
     }
     
     /**
      * Add Image Resource
      * @param fileItem
      * @return the Image File Key
      */
     public String addImageResource( FileItem fileItem )
 	{
     	try 
     	{
     		return FileService.getInstance( ).getFileStoreServiceProvider( ).storeFileItem( fileItem );
     	}
 		catch (FileServiceException e )
     	{
 			AppLogService.error(e);
 			return null;
     	}
 	}
 }