package org.apache.maven.scm.provider.local.command.changelog;
   
   /*
    * 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.IOException;
  import java.util.ArrayList;
  import java.util.Date;
  import java.util.List;
  
  import org.apache.maven.scm.ChangeFile;
  import org.apache.maven.scm.ChangeSet;
  import org.apache.maven.scm.ScmBranch;
  import org.apache.maven.scm.ScmException;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.command.changelog.AbstractChangeLogCommand;
  import org.apache.maven.scm.command.changelog.ChangeLogScmResult;
  import org.apache.maven.scm.command.changelog.ChangeLogSet;
  import org.apache.maven.scm.provider.ScmProviderRepository;
  import org.apache.maven.scm.provider.local.repository.LocalScmProviderRepository;
  import org.codehaus.plexus.util.FileUtils;
  
  /**
   * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
   * @author Olivier Lamy
   *
   */
  public class LocalChangeLogCommand
      extends AbstractChangeLogCommand
  {
      /** {@inheritDoc} */
      protected ChangeLogScmResult executeChangeLogCommand( ScmProviderRepository repository, ScmFileSet fileSet,
                                                            Date startDate, Date endDate, ScmBranch branch,
                                                            String datePattern )
          throws ScmException
      {
          LocalScmProviderRepository repo = (LocalScmProviderRepository) repository;
  
          if ( branch != null )
          {
              throw new ScmException( "The local scm doesn't support tags." );
          }
  
          File root = new File( repo.getRoot() );
  
          String module = repo.getModule();
  
          File source = new File( root, module );
  
          File baseDestination = fileSet.getBasedir();
  
          if ( !baseDestination.exists() )
          {
              throw new ScmException(
                  "The working directory doesn't exist (" + baseDestination.getAbsolutePath() + ")." );
          }
  
          if ( !root.exists() )
          {
              throw new ScmException( "The base directory doesn't exist (" + root.getAbsolutePath() + ")." );
          }
  
          if ( !source.exists() )
          {
              throw new ScmException( "The module directory doesn't exist (" + source.getAbsolutePath() + ")." );
          }
  
          List<ChangeSet> changeLogList = new ArrayList<ChangeSet>();
  
          try
          {
              File repoRoot = new File( repo.getRoot(), repo.getModule() );
  
              List<File> files = fileSet.getFileList();
  
              if ( files.isEmpty() )
              {
                  @SuppressWarnings( "unchecked" )
                  List<File> fileList = FileUtils.getFiles( baseDestination, "**", null, false );
                  files = fileList;
              }
  
             for ( File file : files )
             {
 
                 String path = file.getPath().replace( '\\', '/' );
 
                 File repoFile = new File( repoRoot, path );
 
                 file = new File( baseDestination, path );
 
                 ChangeSet changeSet = new ChangeSet();
 
                 int chop = repoRoot.getAbsolutePath().length();
 
                 String fileName = "/" + repoFile.getAbsolutePath().substring( chop + 1 );
 
                 changeSet.addFile( new ChangeFile( fileName, null ) );
 
                 if ( repoFile.exists() )
                 {
                     long lastModified = repoFile.lastModified();
 
                     Date modifiedDate = new Date( lastModified );
 
                     if ( startDate != null )
                     {
                         if ( startDate.before( modifiedDate ) || startDate.equals( modifiedDate ) )
                         {
                             if ( endDate != null )
                             {
                                 if ( endDate.after( modifiedDate ) || endDate.equals( modifiedDate ) )
                                 {
                                     // nop
                                 }
                                 else
                                 {
                                     continue;
                                 }
                             }
                         }
                         else
                         {
                             continue;
                         }
                     }
 
                     changeSet.setDate( modifiedDate );
 
                     changeLogList.add( changeSet );
                 }
                 else
                 {
                     // This file is deleted
                     changeLogList.add( changeSet );
                 }
             }
         }
         catch ( IOException ex )
         {
             throw new ScmException( "Error while getting change logs.", ex );
         }
 
         return new ChangeLogScmResult( null, new ChangeLogSet( changeLogList, startDate, endDate ) );
     }
 }