package org.apache.maven.archiva.transaction;

 /*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *   http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied.  See the License for the

  * specific language governing permissions and limitations

  * under the License.

  */

 import java.io.File;

 import java.io.IOException;

 import java.util.List;

 import org.apache.commons.io.FileUtils;

 import org.codehaus.plexus.digest.Digester;

 /**

  * Event to copy a file.

  *

  * @version $Id: CopyFileEvent.java 755305 2009-03-17 16:24:16Z brett $

  */

 public class CopyFileEvent

     extends AbstractTransactionEvent

 {

     private final File source;

     private final File destination;

     /**

      * 

      * @param source

      * @param destination

      * @param digesters {@link List}<{@link Digester}> digesters to use for checksumming 

      */

     public CopyFileEvent( File source, File destination, List<Digester> digesters )

     {

         super( digesters );

         this.source = source;

         this.destination = destination;

     }

     public void commit()

         throws IOException

     {

         createBackup( destination );

         mkDirs( destination.getParentFile() );

         FileUtils.copyFile( source, destination );

         createChecksums( destination, true );

         copyChecksums();

         copyChecksum( "asc" );

     }

     /**

      * Copy checksums of source file with all digesters if exist

      * 

      * @throws IOException

      */

     private void copyChecksums()

         throws IOException

     {

         for ( Digester digester : getDigesters() )

         {

             copyChecksum( getDigesterFileExtension( digester ) );

         }

     }

     /**

      * Copy checksum of source file with extension provided if exists

      * 

      * @param extension

      * @return whether the checksum exists or not 

      * @throws IOException

      */

     private boolean copyChecksum( String extension )

         throws IOException

     {

         File checksumSource = new File( source.getAbsolutePath() + "." + extension );

         if ( checksumSource.exists() )

         {

             File checksumDestination = new File( destination.getAbsolutePath() + "." + extension );

             FileUtils.copyFile( checksumSource, checksumDestination );

             return true;

         }

         return false;

     }

     public void rollback()

         throws IOException

     {

         destination.delete();

         revertFilesCreated();

         revertMkDirs();

         restoreBackups();

     }

 }