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 java.io.File;
  import java.io.FileFilter;
  import java.io.FilenameFilter;
  import java.io.IOException;
  import java.util.Arrays;
  import java.util.Calendar;
  
  import org.apache.commons.io.FileUtils;
  import org.apache.commons.io.comparator.LastModifiedFileComparator;
  import org.apache.commons.io.filefilter.DirectoryFileFilter;
  import org.apache.commons.lang.time.DateUtils;
  import org.apache.continuum.purge.ContinuumPurgeConstants;
  import org.apache.maven.archiva.consumers.core.repository.ArtifactFilenameFilter;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * @author Maria Catherine Tan
   */
  public class DaysOldDirectoryPurgeExecutor
      extends AbstractContinuumPurgeExecutor
      implements ContinuumPurgeExecutor
  {
      private Logger log = LoggerFactory.getLogger( DaysOldDirectoryPurgeExecutor.class );
      
      private final int daysOlder;
  
      private final int retentionCount;
  
      private final String directoryType;
  
      public DaysOldDirectoryPurgeExecutor( int daysOlder, int retentionCount, String directoryType )
      {
          this.daysOlder = daysOlder;
  
          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[] releasesDir = releaseDir.listFiles( filter );
  
          if ( retentionCount > releasesDir.length )
          {
              return;
          }
  
          Arrays.sort( releasesDir, LastModifiedFileComparator.LASTMODIFIED_COMPARATOR );
  
          Calendar olderThanThisDate = Calendar.getInstance( DateUtils.UTC_TIME_ZONE );
          olderThanThisDate.add( Calendar.DATE, -daysOlder );
  
          int countToPurge = releasesDir.length - retentionCount;
  
          for ( File dir : releasesDir )
          {
              if ( countToPurge <= 0 )
              {
                 break;
             }
 
             if ( dir.lastModified() < olderThanThisDate.getTimeInMillis() )
             {
                 try
                 {
                     log.info( ContinuumPurgeConstants.PURGE_DIR_CONTENTS + " - " + dir.getName() );
                     FileUtils.deleteDirectory( dir );
                     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;
             }
 
             int countToPurge = buildsDir.length - retentionCount;
 
             Calendar olderThanThisDate = Calendar.getInstance( DateUtils.UTC_TIME_ZONE );
             olderThanThisDate.add( Calendar.DATE, -daysOlder );
 
             Arrays.sort( buildsDir, LastModifiedFileComparator.LASTMODIFIED_COMPARATOR );
 
             for ( File buildDir : buildsDir )
             {
                 if ( countToPurge <= 0 )
                 {
                     break;
                 }
 
                 if ( buildDir.lastModified() < olderThanThisDate.getTimeInMillis() )
                 {
                     try
                     {
                         log.info( ContinuumPurgeConstants.PURGE_DIR_CONTENTS + " - " + buildDir.getName() );
                         FileUtils.deleteDirectory( buildDir );
                         File logFile = new File( buildDir.getAbsoluteFile() + ".log.txt" );
 
                         if ( logFile.exists() )
                         {
                             log.info( ContinuumPurgeConstants.PURGE_FILE + " - " + logFile.getName() );
                             logFile.delete();
                         }
 
                         countToPurge--;
                     }
                     catch ( IOException e )
                     {
                         // swallow?
                     }
                 }
             }
         }
     }
 }