package org.apache.archiva.consumers.core;
   
   /*
    * 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 org.apache.archiva.configuration.ArchivaConfiguration;
  import org.apache.archiva.configuration.ConfigurationNames;
  import org.apache.archiva.configuration.FileTypes;
  import org.apache.archiva.consumers.AbstractMonitoredConsumer;
  import org.apache.archiva.consumers.ConsumerException;
  import org.apache.archiva.consumers.KnownRepositoryContentConsumer;
  import org.apache.archiva.components.registry.Registry;
  import org.apache.archiva.components.registry.RegistryListener;
  import org.apache.archiva.repository.ManagedRepository;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.context.annotation.Scope;
  import org.springframework.stereotype.Service;
  
  import javax.annotation.PostConstruct;
  import javax.inject.Inject;
  import java.io.IOException;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.nio.file.Paths;
  import java.util.ArrayList;
  import java.util.Date;
  import java.util.List;
  
  /**
   * AutoRemoveConsumer
   */
  @Service( "knownRepositoryContentConsumer#auto-remove" )
  @Scope( "prototype" )
  public class AutoRemoveConsumer
      extends AbstractMonitoredConsumer
      implements KnownRepositoryContentConsumer, RegistryListener
  {
  
      private Logger log = LoggerFactory.getLogger( AutoRemoveConsumer.class );
  
      /**
       * default-value="auto-remove"
       */
      private String id = "auto-remove";
  
      /**
       * default-value="Automatically Remove File from Filesystem."
       */
      private String description = "Automatically Remove File from Filesystem.";
  
      /**
       *
       */
      @Inject
      private ArchivaConfiguration configuration;
  
      /**
       *
       */
      @Inject
      private FileTypes filetypes;
  
      private Path repositoryDir;
  
      private List<String> includes = new ArrayList<>( 0 );
  
      @Override
      public String getId( )
      {
          return this.id;
      }
  
      @Override
      public String getDescription( )
      {
          return this.description;
      }
  
      @Override
      public void beginScan( ManagedRepository repository, Date whenGathered )
          throws ConsumerException
      {
         this.repositoryDir = Paths.get( repository.getLocation( ) );
     }
 
     @Override
     public void beginScan( ManagedRepository repository, Date whenGathered, boolean executeOnEntireRepo )
         throws ConsumerException
     {
         beginScan( repository, whenGathered );
     }
 
     @Override
     public void completeScan( )
     {
         /* do nothing */
     }
 
     @Override
     public void completeScan( boolean executeOnEntireRepo )
     {
         completeScan( );
     }
 
     @Override
     public List<String> getExcludes( )
     {
         return null;
     }
 
     @Override
     public List<String> getIncludes( )
     {
         return includes;
     }
 
     @Override
     public void processFile( String path )
         throws ConsumerException
     {
         Path file = this.repositoryDir.resolve(path );
         if ( Files.exists(file) )
         {
             log.info( "(Auto) Removing File: {}", file.toAbsolutePath( ) );
             triggerConsumerInfo( "(Auto) Removing File: " + file.toAbsolutePath( ) );
             try
             {
                 Files.deleteIfExists( file );
             }
             catch ( IOException e )
             {
                 log.error("Could not delete file {}: {}", file, e.getMessage(), e);
                 throw new ConsumerException( "Could not delete file "+file );
             }
         }
     }
 
     @Override
     public void processFile( String path, boolean executeOnEntireRepo )
         throws ConsumerException
     {
         processFile( path );
     }
 
     @Override
     public void afterConfigurationChange( Registry registry, String propertyName, Object propertyValue )
     {
         if ( ConfigurationNames.isRepositoryScanning( propertyName ) )
         {
             initIncludes( );
         }
     }
 
     @Override
     public void beforeConfigurationChange( Registry registry, String propertyName, Object propertyValue )
     {
         /* do nothing */
     }
 
     private void initIncludes( )
     {
         includes = new ArrayList<>( filetypes.getFileTypePatterns( FileTypes.AUTO_REMOVE ) );
     }
 
     @PostConstruct
     public void initialize( )
     {
         configuration.addChangeListener( this );
 
         initIncludes( );
     }
 }