/*
    * Copyright (c) 2002-2021, 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.blobstore.service.database;
  
  import java.io.InputStream;
  
  import org.apache.commons.lang3.StringUtils;
  
  import fr.paris.lutece.plugins.blobstore.business.BytesBlobStore;
  import fr.paris.lutece.plugins.blobstore.business.InputStreamBlobStore;
  import fr.paris.lutece.plugins.blobstore.business.database.DatabaseBlobStoreHome;
  import fr.paris.lutece.plugins.blobstore.business.database.IDatabaseBlobStoreHome;
  import fr.paris.lutece.plugins.blobstore.service.BlobStoreFileItem;
  import fr.paris.lutece.plugins.blobstore.service.IBlobStoreService;
  import fr.paris.lutece.plugins.blobstore.service.download.IBlobStoreDownloadUrlService;
  import fr.paris.lutece.plugins.blobstore.service.download.JSPBlobStoreDownloadUrlService;
  import fr.paris.lutece.plugins.blobstore.util.BlobStoreLibUtils;
  import fr.paris.lutece.portal.service.spring.SpringContextService;
  import fr.paris.lutece.portal.service.util.AppException;
  import fr.paris.lutece.portal.service.util.AppLogService;
  import java.io.IOException;
  import org.apache.commons.fileupload.FileItem;
  
  /**
   * 
   * DatabaseBlobStoreService.
   * 
   */
  public class DatabaseBlobStoreService implements IBlobStoreService
  {
      private static final long serialVersionUID = 1L;
      private static final String MESSAGE_COULD_NOT_CREATE_BLOB = "BlobStore Error when generating a new id blob";
  
      /**
       * name defaulted to databaseBlobstore - only one can be supported by webapp
       */
      private String _strName = "databaseBlobstore";
  
      /** Uses {@link JSPBlobStoreDownloadUrlService} as default one */
      private IBlobStoreDownloadUrlService _downloadUrlService = new JSPBlobStoreDownloadUrlService( );
  
      /**
       * Gets the downloadService
       * 
       * @return the downloadService
       */
      public IBlobStoreDownloadUrlService getDownloadUrlService( )
      {
          return _downloadUrlService;
      }
  
      /**
       * Sets the downloadService
       * 
       * @param downloadUrlService
       *            downloadService
       */
      public void setDownloadUrlService( IBlobStoreDownloadUrlService downloadUrlService )
      {
          _downloadUrlService = downloadUrlService;
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public String getName( )
      {
         return _strName;
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public void setName( String strName )
     {
         _strName = strName;
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public void delete( String strKey )
     {
         IDatabaseBlobStoreHome databaseBlobStoreHome = SpringContextService.getBean( DatabaseBlobStoreHome.BEAN_SERVICE );
         databaseBlobStoreHome.remove( strKey );
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public byte [ ] getBlob( String strKey )
     {
         byte [ ] blob = null;
 
         if ( StringUtils.isNotBlank( strKey ) )
         {
             IDatabaseBlobStoreHome databaseBlobStoreHome = SpringContextService.getBean( DatabaseBlobStoreHome.BEAN_SERVICE );
             BytesBlobStore blobStore = databaseBlobStoreHome.findByPrimaryKey( strKey );
 
             if ( blobStore != null )
             {
                 blob = blobStore.getValue( );
             }
         }
 
         return blob;
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public String store( byte [ ] blob )
     {
         String strKey = BlobStoreLibUtils.generateNewIdBlob( );
 
         if ( StringUtils.isNotBlank( strKey ) )
         {
             BytesBlobStore blobStore = new BytesBlobStore( );
             blobStore.setId( strKey );
             blobStore.setValue( blob );
 
             IDatabaseBlobStoreHome databaseBlobStoreHome = SpringContextService.getBean( DatabaseBlobStoreHome.BEAN_SERVICE );
             databaseBlobStoreHome.create( blobStore );
         }
         else
         {
             AppLogService.error( MESSAGE_COULD_NOT_CREATE_BLOB );
         }
 
         return strKey;
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public void update( String strKey, byte [ ] blob )
     {
         if ( StringUtils.isNotBlank( strKey ) )
         {
             IDatabaseBlobStoreHome databaseBlobStoreHome = SpringContextService.getBean( DatabaseBlobStoreHome.BEAN_SERVICE );
             BytesBlobStore blobStore = databaseBlobStoreHome.findByPrimaryKey( strKey );
 
             if ( blobStore != null )
             {
                 blobStore.setValue( blob );
                 databaseBlobStoreHome.update( blobStore );
             }
         }
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public String storeInputStream( InputStream inputStream )
     {
         String strKey = BlobStoreLibUtils.generateNewIdBlob( );
 
         if ( StringUtils.isNotBlank( strKey ) )
         {
             InputStreamBlobStore blobStore = new InputStreamBlobStore( );
             blobStore.setInputStream( inputStream );
             blobStore.setId( strKey );
 
             IDatabaseBlobStoreHome databaseBlobStoreHome = SpringContextService.getBean( DatabaseBlobStoreHome.BEAN_SERVICE );
             databaseBlobStoreHome.createInputStream( blobStore );
         }
         else
         {
             AppLogService.error( MESSAGE_COULD_NOT_CREATE_BLOB );
         }
 
         return strKey;
     }
 
     /*
      * (non-Javadoc)
      * 
      * @see fr.paris.lutece.portal.service.blobstore.BlobStoreService#storeFileItem (java.io.InputStream)
      */
     @Override
     public String storeFileItem( FileItem fileItem )
     {
         try
         {
             // store the file content
             String strBlobContentKey = storeInputStream( fileItem.getInputStream( ) );
 
             // build metadata as json file and store it
             String strMetadata = BlobStoreFileItem.buildFileMetadata( fileItem.getName( ), fileItem.getSize( ), strBlobContentKey, fileItem.getContentType( ) );
             String strMetadataKey = store( strMetadata.getBytes( ) );
 
             return strMetadataKey;
         }
         catch( final IOException e )
         {
             throw new AppException( e.getMessage( ), e );
         }
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public void updateInputStream( String strKey, InputStream inputStream )
     {
         InputStreamBlobStore blobStore = new InputStreamBlobStore( );
         blobStore.setInputStream( inputStream );
         blobStore.setId( strKey );
 
         IDatabaseBlobStoreHome databaseBlobStoreHome = SpringContextService.getBean( DatabaseBlobStoreHome.BEAN_SERVICE );
         databaseBlobStoreHome.updateInputStream( blobStore );
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public InputStream getBlobInputStream( String strKey )
     {
         IDatabaseBlobStoreHome databaseBlobStoreHome = SpringContextService.getBean( DatabaseBlobStoreHome.BEAN_SERVICE );
 
         return databaseBlobStoreHome.findByPrimaryKeyInputStream( strKey );
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public String getBlobUrl( String strKey )
     {
         return _downloadUrlService.getDownloadUrl( getName( ), strKey );
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public String getFileUrl( String strKey )
     {
         return _downloadUrlService.getFileUrl( getName( ), strKey );
     }
 }