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.checksum.ChecksumAlgorithm;
  import org.apache.archiva.checksum.ChecksumReference;
  import org.apache.archiva.checksum.ChecksumValidationException;
  import org.apache.archiva.checksum.ChecksummedFile;
  import org.apache.archiva.consumers.AbstractMonitoredConsumer;
  import org.apache.archiva.consumers.ConsumerException;
  import org.apache.archiva.consumers.KnownRepositoryContentConsumer;
  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 java.nio.file.Path;
  import java.nio.file.Paths;
  import java.util.ArrayList;
  import java.util.Date;
  import java.util.List;
  import java.util.Set;
  
  import static org.apache.archiva.checksum.ChecksumValidationException.ValidationError.*;
  
  /**
   * ValidateChecksumConsumer - validate the provided checksum against the file it represents.
   */
  @Service( "knownRepositoryContentConsumer#validate-checksums" )
  @Scope( "prototype" )
  public class ValidateChecksumConsumer
      extends AbstractMonitoredConsumer
      implements KnownRepositoryContentConsumer
  {
      private Logger log = LoggerFactory.getLogger( ValidateChecksumConsumer.class );
  
      private static final String NOT_VALID_CHECKSUM = "checksum-not-valid";
  
      private static final String CHECKSUM_NOT_FOUND = "checksum-not-found";
  
      private static final String CHECKSUM_DIGESTER_FAILURE = "checksum-digester-failure";
  
      private static final String CHECKSUM_IO_ERROR = "checksum-io-error";
  
      private String id = "validate-checksums";
  
      private String description = "Validate checksums against file.";
  
      private Path repositoryDir;
  
      private List<String> includes;
  
      @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( )
     {
         /* nothing to do */
     }
 
     @Override
     public void completeScan( boolean executeOnEntireRepo )
     {
         completeScan( );
     }
 
     @Override
     public List<String> getExcludes( )
     {
         return null;
     }
 
     @Override
     public List<String> getIncludes( )
     {
         return this.includes;
     }
 
     @Override
     public void processFile( String path )
         throws ConsumerException
     {
         Path checksumFile = this.repositoryDir.resolve( path );
         try
         {
             ChecksumReference cf = ChecksummedFile.getFromChecksumFile( checksumFile );
             if ( !cf.getFile().isValidChecksum( cf.getAlgorithm(), true )  )
             {
                 log.warn( "The checksum for {} is invalid.", checksumFile );
                 triggerConsumerWarning( NOT_VALID_CHECKSUM, "The checksum for " + checksumFile + " is invalid." );
             }
         }
         catch ( ChecksumValidationException e )
         {
             if (e.getErrorType()==READ_ERROR) {
                 log.error( "Checksum read error during validation on {}", checksumFile );
                 triggerConsumerError( CHECKSUM_IO_ERROR, "Checksum I/O error during validation on " + checksumFile );
             } else if (e.getErrorType()==INVALID_FORMAT || e.getErrorType()==DIGEST_ERROR) {
                 log.error( "Digester failure during checksum validation on {}", checksumFile );
                 triggerConsumerError( CHECKSUM_DIGESTER_FAILURE,
                     "Digester failure during checksum validation on " + checksumFile );
             } else if (e.getErrorType()==FILE_NOT_FOUND) {
                 log.error( "File not found during checksum validation: ", e );
                 triggerConsumerError( CHECKSUM_NOT_FOUND, "File not found during checksum validation: " + e.getMessage( ) );
             }
         }
     }
 
     @Override
     public void processFile( String path, boolean executeOnEntireReDpo )
         throws Exception
     {
         processFile( path );
     }
 
     @PostConstruct
     public void initialize( )
     {
         Set<String> extensions = ChecksumAlgorithm.getAllExtensions();
         includes = new ArrayList<>( extensions.size() );
         for ( String ext : extensions )
         {
             includes.add( "**/*." + ext );
         }
     }
 }