package org.apache.maven.archiva.consumers.core.repository;

 /*

  * 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.FilenameFilter;

 import java.util.List;

 import java.util.Set;

 import org.slf4j.Logger;

 import org.slf4j.LoggerFactory;

 import org.apache.maven.archiva.model.ArchivaArtifact;

 import org.apache.maven.archiva.model.ArtifactReference;

 import org.apache.maven.archiva.repository.audit.AuditEvent;

 import org.apache.maven.archiva.repository.ManagedRepositoryContent;

 import org.apache.maven.archiva.repository.events.RepositoryListener;

 /**

  * Base class for all repository purge tasks.

  * 

  */

 public abstract class AbstractRepositoryPurge

     implements RepositoryPurge

 {

     protected Logger log = LoggerFactory.getLogger( AbstractRepositoryPurge.class );

     protected final ManagedRepositoryContent repository;

         protected final List<RepositoryListener> listeners;

           private Logger logger = LoggerFactory.getLogger( "org.apache.archiva.AuditLog" );

           private static final char DELIM = ' ';

     public AbstractRepositoryPurge( ManagedRepositoryContent repository, List<RepositoryListener> listeners )

     {

         this.repository = repository;

         this.listeners = listeners;

     }

     /**

      * Get all files from the directory that matches the specified filename.

      * 

      * @param dir the directory to be scanned

      * @param filename the filename to be matched

      * @return

      */

     protected File[] getFiles( File dir, String filename )

     {

         FilenameFilter filter = new ArtifactFilenameFilter( filename );

         File[] files = dir.listFiles( filter );

         return files;

     }

     protected String toRelativePath( File artifactFile )

     {

         String artifactPath = artifactFile.getAbsolutePath();

         if ( artifactPath.startsWith( repository.getRepoRoot() ) )

         {

             artifactPath = artifactPath.substring( repository.getRepoRoot().length() );

         }

         return artifactPath;

     }

     /**

      * Purge the repo. Update db and index of removed artifacts.

      * 

      * @param references

      */

     protected void purge( Set<ArtifactReference> references )

     {        

         if( references != null && !references.isEmpty() )

         {

             for ( ArtifactReference reference : references )

             {   

                 File artifactFile = repository.toFile( reference );

                 ArchivaArtifact artifact =

                     new ArchivaArtifact( reference.getGroupId(), reference.getArtifactId(), reference.getVersion(),

                                          reference.getClassifier(), reference.getType(), repository.getId() );

                 for ( RepositoryListener listener : listeners )

                 {

                     listener.deleteArtifact( repository, artifact );

                 }

                 // TODO: this needs to be logged

                 artifactFile.delete();

                 triggerAuditEvent( repository.getRepository().getId(), ArtifactReference.toKey( reference ), AuditEvent.PURGE_ARTIFACT );

                 purgeSupportFiles( artifactFile );

             }

         }

     }

     /**

      * <p>

      * This find support files for the artifactFile and deletes them.

      * </p>

      * <p>

      * Support Files are things like ".sha1", ".md5", ".asc", etc.

      * </p>

      * 

      * @param artifactFile the file to base off of.

      */

     private void purgeSupportFiles( File artifactFile )

     {

         File parentDir = artifactFile.getParentFile();

         if ( !parentDir.exists() )

         {

             return;

         }

         FilenameFilter filter = new ArtifactFilenameFilter( artifactFile.getName() );

         File[] files = parentDir.listFiles( filter );

         for ( File file : files )

         {

             if ( file.exists() && file.isFile() )

             {

                 String fileName = file.getName();

                 file.delete();

                 // TODO: log that it was deleted

                 triggerAuditEvent( repository.getRepository().getId(), fileName, AuditEvent.PURGE_FILE );

             }

         }

     }

     private void triggerAuditEvent( String repoId, String resource, String action )

     {

         String msg = repoId + DELIM + "<system-purge>" + DELIM + "<system>" + DELIM + '\"' + resource + '\"' +

             DELIM + '\"' + action + '\"';

         logger.info( msg );

     }

 }