/**
 * Copyright (c) 2010, Sebastian Sdorra
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of SCM-Manager; nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * http://bitbucket.org/sdorra/scm-manager
 *
 */



package sonia.scm.repository.spi;

//~--- non-JDK imports --------------------------------------------------------

import com.google.common.base.Function;
import com.google.common.base.Strings;
import com.google.common.collect.Lists;

import sonia.scm.repository.Repository;
import sonia.scm.repository.Tag;
import sonia.scm.util.Util;

//~--- JDK imports ------------------------------------------------------------

import java.util.List;

/**
 *
 * @author Sebastian Sdorra
 */
public class HgTagsCommand extends AbstractCommand implements TagsCommand
{

  /**
   * Constructs ...
   *
   *
   * @param context
   * @param repository
   */
  public HgTagsCommand(HgCommandContext context, Repository repository)
  {
    super(context, repository);
  }

  //~--- get methods ----------------------------------------------------------

  /**
   * Method description
   *
   *
   * @return
   */
  @Override
  public List<Tag> getTags()
  {
    com.aragost.javahg.commands.TagsCommand cmd =
      com.aragost.javahg.commands.TagsCommand.on(open());

    List<com.aragost.javahg.commands.Tag> tagList = cmd.includeTip().execute();

    List<Tag> tags = null;

    // check for empty repository
    if (Util.isNotEmpty(tagList) && tagList.get(0).getChangeset() != null)
    {
      tags = Lists.transform(tagList, new TagTransformer());
    }

    if (tags == null)
    {
      tags = Lists.newArrayList();
    }

    return tags;
  }

  //~--- inner classes --------------------------------------------------------

  /**
   * Class description
   *
   *
   * @version        Enter version here..., 12/08/03
   * @author         Enter your name here...
   */
  private static class TagTransformer
    implements Function<com.aragost.javahg.commands.Tag, Tag>
  {

    /**
     * Method description
     *
     *
     * @param f
     *
     * @return
     */
    @Override
    public Tag apply(com.aragost.javahg.commands.Tag f)
    {
      Tag t = null;

      if ((f != null) &&!Strings.isNullOrEmpty(f.getName())
        && (f.getChangeset() != null))
      {
        t = new Tag(f.getName(), f.getChangeset().getNode());
      }

      return t;
    }
  }
}
