package org.apache.continuum.purge.executor;
   
   /*
    * 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.commons.io.FileUtils;
  import org.apache.commons.io.comparator.LastModifiedFileComparator;
  import org.apache.commons.io.filefilter.DirectoryFileFilter;
  import org.apache.continuum.purge.ContinuumPurgeConstants;
  import org.apache.maven.archiva.consumers.core.repository.ArtifactFilenameFilter;
  
  import java.io.File;
  import java.io.FileFilter;
  import java.io.FilenameFilter;
  import java.io.IOException;
  import java.util.Arrays;
  
  /**
   * @author Maria Catherine Tan
   */
  public class RetentionCountDirectoryPurgeExecutor
      extends AbstractContinuumPurgeExecutor
      implements ContinuumPurgeExecutor
  {
      private final int retentionCount;
  
      private final String directoryType;
  
      public RetentionCountDirectoryPurgeExecutor( int retentionCount, String directoryType )
      {
          this.retentionCount = retentionCount;
  
          this.directoryType = directoryType;
      }
  
      public void purge( String path )
          throws ContinuumPurgeExecutorException
      {
          if ( directoryType.equals( ContinuumPurgeConstants.PURGE_DIRECTORY_RELEASES ) )
          {
              purgeReleaseDirectory( path );
          }
          else if ( directoryType.equals( ContinuumPurgeConstants.PURGE_DIRECTORY_BUILDOUTPUT ) )
          {
              purgeBuildOutputDirectory( path );
          }
      }
  
      private void purgeReleaseDirectory( String path )
      {
          File releaseDir = new File( path );
  
          FilenameFilter filter = new ArtifactFilenameFilter( "releases-" );
  
          File[] files = releaseDir.listFiles( filter );
  
          if ( retentionCount > files.length )
          {
              return;
          }
  
          Arrays.sort( files, LastModifiedFileComparator.LASTMODIFIED_COMPARATOR );
  
          int countToPurge = files.length - retentionCount;
  
          for ( File file : files )
          {
              if ( countToPurge <= 0 )
              {
                  break;
              }
  
              try
              {
                  FileUtils.deleteDirectory( file );
                  countToPurge--;
              }
              catch ( IOException e )
              {
                  //throw new ContinuumPurgeExecutorException( "Error while purging release directories", e );
              }
          }
      }
 
     private void purgeBuildOutputDirectory( String path )
     {
         File buildOutputDir = new File( path );
 
         FileFilter filter = DirectoryFileFilter.DIRECTORY;
 
         File[] projectsDir = buildOutputDir.listFiles( filter );
 
         for ( File projectDir : projectsDir )
         {
             File[] buildsDir = projectDir.listFiles( filter );
 
             if ( retentionCount > buildsDir.length )
             {
                 continue;
             }
 
             Arrays.sort( buildsDir, LastModifiedFileComparator.LASTMODIFIED_COMPARATOR );
 
             int countToPurge = buildsDir.length - retentionCount;
 
             for ( File buildDir : buildsDir )
             {
                 if ( countToPurge-- <= 0 )
                 {
                     break;
                 }
 
                 try
                 {
                     FileUtils.deleteDirectory( buildDir );
                     File logFile = new File( buildDir.getAbsoluteFile() + ".log.txt" );
 
                     if ( logFile.exists() )
                     {
                         logFile.delete();
                     }
                 }
                 catch ( IOException e )
                 {
                     //swallow?
                 }
             }
         }
     }
 }