package org.apache.maven.scm.provider.hg.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.util.ArrayList;
  import java.util.Date;
  import java.util.List;
  import java.util.Locale;
  
  import org.apache.maven.scm.ChangeFile;
  import org.apache.maven.scm.ChangeSet;
  import org.apache.maven.scm.ScmFileStatus;
  import org.apache.maven.scm.provider.hg.command.HgConsumer;
  
  /**
   * @author <a href="mailto:thurner.rupert@ymono.net">thurner rupert</a>
   * @author <a href="mailto:hr.mohr@gmail.com">Mads Mohr Christensen</a>
   */
  public class HgChangeLogConsumer
      extends HgConsumer
  {
  
      private static final String TIME_PATTERN = "yyyy-MM-dd HH:mm:ss Z";
  
      private static final String REVNO_TAG = "changeset:";
  
      private static final String TAG_TAG = "tag:";
  
      private static final String BRANCH_TAG = "branch:";
  
      private static final String AUTHOR_TAG = "user:";
  
      private static final String TIME_STAMP_TOKEN = "date:";
  
      private static final String MESSAGE_TOKEN = "description:";
  
      private static final String FILES_TOKEN = "files:";
  
      private List<ChangeSet> logEntries = new ArrayList<ChangeSet>();
  
      private ChangeSet currentChange;
  
      private String currentRevision;
  
      @SuppressWarnings( "unused" )
      private String currentBranch; // don't know what to do with this
  
      private String userDatePattern;
  
      public HgChangeLogConsumer( String userDatePattern )
      {
          this.userDatePattern = userDatePattern;
      }
  
      public List<ChangeSet> getModifications()
      {
          return logEntries;
      }
  
      /**
       * {@inheritDoc}
       */
      public void consumeLine( String line )
      {
          // override default behaviour which tries to pick through things for some standard messages.  that
          // does not apply here
          String trimmedLine = line.trim();
          doConsume( null, trimmedLine );
      }
  
      /**
       * {@inheritDoc}
       */
      public void doConsume( ScmFileStatus status, String line )
      {
          String tmpLine;
  
          // new changeset
          if ( line.startsWith( REVNO_TAG ) )
          {
              //Init a new changeset
              currentChange = new ChangeSet();
             currentChange.setFiles( new ArrayList<ChangeFile>( 0 ) );
             logEntries.add( currentChange );
 
             // parse revision
             tmpLine = line.substring( REVNO_TAG.length() ).trim();
             currentRevision = tmpLine.substring( tmpLine.indexOf( ':' ) + 1 );
             currentChange.setRevision( currentRevision );
         }
         else if ( line.startsWith( BRANCH_TAG ) )
         {
             tmpLine = line.substring( BRANCH_TAG.length() ).trim();
             currentBranch = tmpLine;
         }
         else if ( line.startsWith( AUTHOR_TAG ) )
         {
             tmpLine = line.substring( AUTHOR_TAG.length() ).trim();
             currentChange.setAuthor( tmpLine );
         }
         else if ( line.startsWith( TIME_STAMP_TOKEN ) )
         {
             tmpLine = line.substring( TIME_STAMP_TOKEN.length() ).trim();
             Date date = parseDate( tmpLine, userDatePattern, TIME_PATTERN, Locale.ENGLISH );
             currentChange.setDate( date );
         }
         else if ( line.startsWith( TAG_TAG ) )
         {
             tmpLine = line.substring( TAG_TAG.length() ).trim();
             currentChange.addTag( tmpLine );
         }
         else if ( line.startsWith( FILES_TOKEN ) )
         {
             tmpLine = line.substring( FILES_TOKEN.length() ).trim();
             String[] files = tmpLine.split( " " );
             for ( int i = 0; i < files.length; i++ )
             {
                 String file = files[i];
                 ChangeFile changeFile = new ChangeFile( file, currentRevision );
                 currentChange.addFile( changeFile );
             }
         }
         else if ( line.startsWith( MESSAGE_TOKEN ) )
         {
             currentChange.setComment( "" );
         }
         else
         {
             StringBuilder comment = new StringBuilder( currentChange.getComment() );
             comment.append( line );
             currentChange.setComment( comment.toString() );
         }
     }
 }