package org.apache.maven.scm.provider.git.jgit.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 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.ScmVersion;
  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.git.command.GitCommand;
  import org.apache.maven.scm.provider.git.jgit.command.JGitUtils;
  import org.eclipse.jgit.api.Git;
  import org.eclipse.jgit.errors.IncorrectObjectTypeException;
  import org.eclipse.jgit.errors.MissingObjectException;
  import org.eclipse.jgit.lib.Repository;
  import org.eclipse.jgit.revwalk.RevCommit;
  import org.eclipse.jgit.revwalk.RevSort;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Date;
  import java.util.List;
  
  /**
   * @author <a href="mailto:struberg@yahoo.de">Mark Struberg</a>
   * @author Dominik Bartholdi (imod)
   * @since 1.9
   */
  public class JGitChangeLogCommand
      extends AbstractChangeLogCommand
      implements GitCommand
  {
  
      /**
       * {@inheritDoc}
       */
      protected ChangeLogScmResult executeChangeLogCommand( ScmProviderRepository repo, ScmFileSet fileSet,
                                                            ScmVersion startVersion, ScmVersion endVersion,
                                                            String datePattern )
          throws ScmException
      {
          return executeChangeLogCommand( repo, fileSet, null, null, null, datePattern, startVersion, endVersion );
      }
  
      /**
       * {@inheritDoc}
       */
      protected ChangeLogScmResult executeChangeLogCommand( ScmProviderRepository repo, ScmFileSet fileSet,
                                                            Date startDate, Date endDate, ScmBranch branch,
                                                            String datePattern )
          throws ScmException
      {
          return executeChangeLogCommand( repo, fileSet, startDate, endDate, branch, datePattern, null, null );
      }
  
      protected ChangeLogScmResult executeChangeLogCommand( ScmProviderRepository repo, ScmFileSet fileSet,
                                                            Date startDate, Date endDate, ScmBranch branch,
                                                            String datePattern, ScmVersion startVersion,
                                                            ScmVersion endVersion )
          throws ScmException
      {
          Git git = null;
          try
          {
              git = JGitUtils.openRepo( fileSet.getBasedir() );
  
              String startRev = startVersion != null ? startVersion.getName() : null;
              String endRev = endVersion != null ? endVersion.getName() : null;
  
              List<ChangeEntry> gitChanges =
                  this.whatchanged( git.getRepository(), null, startRev, endRev, startDate, endDate, -1 );
  
              List<ChangeSet> modifications = new ArrayList<ChangeSet>( gitChanges.size() );
  
              for ( ChangeEntry change : gitChanges )
              {
                  ChangeSet scmChange = new ChangeSet();
 
                 scmChange.setAuthor( change.getAuthorName() );
                 scmChange.setComment( change.getBody() );
                 scmChange.setDate( change.getAuthorDate() );
                 scmChange.setRevision( change.getCommitHash() );
                 // X TODO scmChange.setFiles( change.get )
 
                 modifications.add( scmChange );
             }
 
             ChangeLogSet changeLogSet = new ChangeLogSet( modifications, startDate, endDate );
             changeLogSet.setStartVersion( startVersion );
             changeLogSet.setEndVersion( endVersion );
 
             return new ChangeLogScmResult( "JGit changelog", changeLogSet );
         }
         catch ( Exception e )
         {
             throw new ScmException( "JGit changelog failure!", e );
         }
         finally
         {
             JGitUtils.closeRepo( git );
         }
     }
 
     public List<ChangeEntry> whatchanged( Repository repo, RevSort[] sortings, String fromRev, String toRev,
                                           Date fromDate, Date toDate, int maxLines )
         throws MissingObjectException, IncorrectObjectTypeException, IOException
     {
         List<RevCommit> revs = JGitUtils.getRevCommits( repo, sortings, fromRev, toRev, fromDate, toDate, maxLines );
         List<ChangeEntry> changes = new ArrayList<ChangeEntry>( revs.size() );
 
         for ( RevCommit c : revs )
         {
             ChangeEntry ce = new ChangeEntry();
 
             ce.setAuthorDate( c.getAuthorIdent().getWhen() );
             ce.setAuthorEmail( c.getAuthorIdent().getEmailAddress() );
             ce.setAuthorName( c.getAuthorIdent().getName() );
             ce.setCommitterDate( c.getCommitterIdent().getWhen() );
             ce.setCommitterEmail( c.getCommitterIdent().getEmailAddress() );
             ce.setCommitterName( c.getCommitterIdent().getName() );
 
             ce.setSubject( c.getShortMessage() );
             ce.setBody( c.getFullMessage() );
 
             ce.setCommitHash( c.getId().name() );
             ce.setTreeHash( c.getTree().getId().name() );
 
             // X TODO missing: file list
 
             changes.add( ce );
         }
 
         return changes;
     }
 
     /**
      * 
      */
     public static final class ChangeEntry
     {
         private String commitHash;
 
         private String treeHash;
 
         private String authorName;
 
         private String authorEmail;
 
         private Date authorDate;
 
         private String committerName;
 
         private String committerEmail;
 
         private Date committerDate;
 
         private String subject;
 
         private String body;
 
         private List<File> files;
 
         public String getCommitHash()
         {
             return commitHash;
         }
 
         public void setCommitHash( String commitHash )
         {
             this.commitHash = commitHash;
         }
 
         public String getTreeHash()
         {
             return treeHash;
         }
 
         public void setTreeHash( String treeHash )
         {
             this.treeHash = treeHash;
         }
 
         public String getAuthorName()
         {
             return authorName;
         }
 
         public void setAuthorName( String authorName )
         {
             this.authorName = authorName;
         }
 
         public String getAuthorEmail()
         {
             return authorEmail;
         }
 
         public void setAuthorEmail( String authorEmail )
         {
             this.authorEmail = authorEmail;
         }
 
         public Date getAuthorDate()
         {
             return authorDate;
         }
 
         public void setAuthorDate( Date authorDate )
         {
             this.authorDate = authorDate;
         }
 
         public String getCommitterName()
         {
             return committerName;
         }
 
         public void setCommitterName( String committerName )
         {
             this.committerName = committerName;
         }
 
         public String getCommitterEmail()
         {
             return committerEmail;
         }
 
         public void setCommitterEmail( String committerEmail )
         {
             this.committerEmail = committerEmail;
         }
 
         public Date getCommitterDate()
         {
             return committerDate;
         }
 
         public void setCommitterDate( Date committerDate )
         {
             this.committerDate = committerDate;
         }
 
         public String getSubject()
         {
             return subject;
         }
 
         public void setSubject( String subject )
         {
             this.subject = subject;
         }
 
         public String getBody()
         {
             return body;
         }
 
         public void setBody( String body )
         {
             this.body = body;
         }
 
         public List<File> getFiles()
         {
             return files;
         }
 
         public void setFiles( List<File> files )
         {
             this.files = files;
         }
     }
 }