package org.codehaus.mojo.siteskinner;
   
   /*
    * 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 org.apache.maven.plugin.logging.Log;
  import org.apache.maven.scm.ScmException;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.ScmResult;
  import org.apache.maven.scm.command.checkout.CheckOutScmResult;
  import org.apache.maven.scm.command.update.UpdateScmResult;
  import org.apache.maven.scm.manager.ScmManager;
  import org.apache.maven.scm.provider.ScmProvider;
  import org.apache.maven.scm.repository.ScmRepository;
  
  /**
   *  Executes scm command
   */
  public class ScmCommandExecutor
  {
      private ScmManager manager;
  
      private String connectionUrl;
      
      private Log log;
  
      /**
       * The constructor.
       * 
       * @param manager the scmManager
       * @param connectionUrl the connection URL
       * @param log the mojo logger
       */
      public ScmCommandExecutor( ScmManager manager, String connectionUrl, Log log )
      {
          this.manager = manager;
          
          this.connectionUrl = connectionUrl;
          
          this.log = log;
      }
  
      /**
       * Check out sources in the {@code targetDirectory}.
       *  
       * @param targetDirectory the directory where the sources will be checked out 
       * @throws ScmException if the checkout throws an exception
       */
      public void checkout( String targetDirectory )
          throws ScmException
      {
          checkout( targetDirectory, null, null );
      }
  
      /**
       * Check out sources in the {@code targetDirectory}.
       * 
       * @param targetDirectory the directory where the sources will be checked out
       * @param includes the sources to include
       * @param excludes the sources to exclude
       * @throws ScmException if the checkout throws an exception
       */
      public void checkout( String targetDirectory, String includes, String excludes )
          throws ScmException
      {
          try
          {
              ScmRepository repository = manager.makeScmRepository( connectionUrl );
  
              ScmProvider provider = manager.getProviderByRepository( repository );
  
              ScmFileSet fileSet = getFileSet( targetDirectory, includes, excludes );
  
              CheckOutScmResult result = provider.checkOut( repository, fileSet );
  
              if ( !checkResult( result ) ) 
              {
                  throw new ScmException( "checkout failed with provider message" );
              }
          }
         catch ( Exception ex )
         {
             throw new ScmException( "checkout failed.", ex );
         }
     }
     
     /**
      * Update the sources in the {@code targetDirectory}.
      * 
      * @param targetDirectory the directory where the sources will be updated
      * @throws ScmException if the update throws an exception
      */
     public void update( String targetDirectory )
         throws ScmException
     {
         update( targetDirectory, null, null );
     }
     
     /**
      * Update the sources in the {@code targetDirectory}.
      * 
      * @param targetDirectory the directory where the sources will be updated
      * @param includes the sources to include
      * @param excludes the sources to exclude
      * @throws ScmException if the update throws an exception
      */
     public void update( String targetDirectory, String includes, String excludes  )
         throws ScmException
     {
         try
         {
             ScmRepository repository = manager.makeScmRepository( connectionUrl );
 
             ScmProvider provider = manager.getProviderByRepository( repository );
             
             ScmFileSet fileSet = getFileSet( targetDirectory, includes, excludes );
             
             UpdateScmResult result = provider.update( repository, fileSet );
 
             if ( !checkResult( result ) )
             {
                 throw new ScmException( "checkout failed with provider message" );
             }
         }
         catch ( Exception ex )
         {
             throw new ScmException( "checkout failed.", ex );
         }
     }
     
     private ScmFileSet getFileSet( String path, String includes, String excludes ) throws IOException
     {
         File dir = new File( path );
         
         if ( includes != null || excludes != null )
         {
             return new ScmFileSet( dir, includes, excludes );
         }
         else
         {
             return new ScmFileSet( dir );
         }
     }
 
     private boolean checkResult( ScmResult result )
     {
         if ( !result.isSuccess() )
         {
 
             log.warn( "Provider message:" );
 
             log.warn( result.getProviderMessage() == null ? "" : result.getProviderMessage() );
 
             log.warn( "Command output:" );
 
             log.warn( result.getCommandOutput() == null ? "" : result.getCommandOutput() );
             
             return false;
         }
         else 
         {
             return true;
         }
     }
 }