package org.apache.maven.scm.provider.perforce.command.blame;
   
   /*
    * 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.ScmException;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.command.blame.AbstractBlameCommand;
  import org.apache.maven.scm.command.blame.BlameLine;
  import org.apache.maven.scm.command.blame.BlameScmResult;
  import org.apache.maven.scm.provider.ScmProviderRepository;
  import org.apache.maven.scm.provider.perforce.PerforceScmProvider;
  import org.apache.maven.scm.provider.perforce.command.PerforceCommand;
  import org.apache.maven.scm.provider.perforce.repository.PerforceScmProviderRepository;
  import org.codehaus.plexus.util.cli.CommandLineException;
  import org.codehaus.plexus.util.cli.CommandLineUtils;
  import org.codehaus.plexus.util.cli.Commandline;
  
  import java.io.File;
  import java.util.List;
  
  /**
   * @author Evgeny Mandrikov
   * @author Olivier Lamy
   * @since 1.4
   */
  public class PerforceBlameCommand
      extends AbstractBlameCommand
      implements PerforceCommand
  {
      public BlameScmResult executeBlameCommand( ScmProviderRepository repo, ScmFileSet workingDirectory,
                                                 String filename )
          throws ScmException
      {
          // Call annotate command
          PerforceScmProviderRepository p4repo = (PerforceScmProviderRepository) repo;
          String clientspec = PerforceScmProvider.getClientspecName( getLogger(), p4repo, workingDirectory.getBasedir() );
          Commandline cl =
              createCommandLine( (PerforceScmProviderRepository) repo, workingDirectory.getBasedir(), filename,
                                 clientspec );
  
          PerforceBlameConsumer blameConsumer = new PerforceBlameConsumer( getLogger() );
  
          CommandLineUtils.StringStreamConsumer stderr = new CommandLineUtils.StringStreamConsumer();
  
          int exitCode;
  
          try
          {
              exitCode = CommandLineUtils.executeCommandLine( cl, blameConsumer, stderr );
          }
          catch ( CommandLineException ex )
          {
              throw new ScmException( "Error while executing command.", ex );
          }
          if ( exitCode != 0 )
          {
              return new BlameScmResult( cl.toString(), "The perforce command failed.", stderr.getOutput(), false );
          }
  
          // Call filelog command
  
          cl =
              createFilelogCommandLine( (PerforceScmProviderRepository) repo, workingDirectory.getBasedir(), filename,
                                        clientspec );
  
          PerforceFilelogConsumer filelogConsumer = new PerforceFilelogConsumer( getLogger() );
  
          try
          {
              exitCode = CommandLineUtils.executeCommandLine( cl, filelogConsumer, stderr );
          }
          catch ( CommandLineException ex )
          {
              throw new ScmException( "Error while executing command.", ex );
          }
          if ( exitCode != 0 )
          {
              return new BlameScmResult( cl.toString(), "The perforce command failed.", stderr.getOutput(), false );
          }
  
          // Combine results
  
         List<BlameLine> lines = blameConsumer.getLines();
         for ( int i = 0; i < lines.size(); i++ )
         {
             BlameLine line = lines.get( i );
             String revision = line.getRevision();
             line.setAuthor( filelogConsumer.getAuthor( revision ) );
             line.setDate( filelogConsumer.getDate( revision ) );
         }
 
         return new BlameScmResult( cl.toString(), lines );
     }
 
     public static Commandline createCommandLine( PerforceScmProviderRepository repo, File workingDirectory,
                                                  String filename, final String clientspec )
     {
         Commandline cl = PerforceScmProvider.createP4Command( repo, workingDirectory );
         if ( clientspec != null )
         {
             cl.createArg().setValue( "-c" );
             cl.createArg().setValue( clientspec );
         }        
         cl.createArg().setValue( "annotate" );
         cl.createArg().setValue( "-q" ); // quiet
         cl.createArg().setValue( filename );
         return cl;
     }
 
     public static Commandline createFilelogCommandLine( PerforceScmProviderRepository repo, File workingDirectory,
                                                         String filename, final String clientspec )
     {
         Commandline cl = PerforceScmProvider.createP4Command( repo, workingDirectory );
         if ( clientspec != null )
         {
             cl.createArg().setValue( "-c" );
             cl.createArg().setValue( clientspec );
         }
         cl.createArg().setValue( "filelog" );
         cl.createArg().setValue( filename );
         return cl;
     }
 }