/**
    * This file Copyright (c) 2003-2010 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.module.rssaggregator.setup;
  
  import java.util.Collection;
  import java.util.Iterator;
  
  import info.magnolia.cms.core.Content;
  import info.magnolia.cms.core.HierarchyManager;
  import info.magnolia.cms.core.NodeData;
  import info.magnolia.cms.util.ContentUtil;
  import info.magnolia.module.InstallContext;
  import info.magnolia.module.data.DataConsts;
  import info.magnolia.module.delta.AbstractRepositoryTask;
  import info.magnolia.module.delta.TaskExecutionException;
  
  import javax.jcr.RepositoryException;
  
  import org.apache.commons.lang.StringUtils;
  
  /**
   * A {@link info.magnolia.module.delta.Task} which changes the node type of folders in RSS Aggregator feeds.
   *
   * @author had
   * @version $Id $
   */
  public class ChangeNodeTypes extends AbstractRepositoryTask {
  
      public ChangeNodeTypes() {
          super("Nodetypes change", "Changes the node type of folders in RSS Aggregator feeds.");
      }
  
      protected void doExecute(InstallContext ctx) throws RepositoryException, TaskExecutionException {
          final HierarchyManager hm = ctx.getHierarchyManager("data");
          try {
              Collection<Content> feedDefinitions = hm.getRoot().getContent("rssaggregator").getChildren("RssAggregator");
              for (Content feedDef : feedDefinitions) {
                  ContentUtil.visit(feedDef, new TypeChanger());
              }
          } catch (Exception e) {
              throw new TaskExecutionException("Cant' update folder node types in users workspace: " + e.getMessage(), e);
          }
      }
  
      private final static class TypeChanger implements ContentUtil.PostVisitor {
  
          public void postVisit(Content node) throws Exception {
              Content parent = null;
              if (node.getLevel() == 0) {
                  // node is a root node
                  return;
              }
  
              if ("RssAggregator".equals(node.getItemType().getSystemName())) {
                  // the feed node itself
                  return;
              }
              parent = node.getParent();
              String name = node.getName();
              Content tmp = parent.createContent("tmp---tmp---" + name, DataConsts.MODULE_DATA_CONTENT_NODE_TYPE);
              Collection children = node.getChildren(ContentUtil.EXCLUDE_META_DATA_CONTENT_FILTER);
              for (Iterator iterator = children.iterator(); iterator.hasNext();) {
                  Content object = (Content) iterator.next();
                  //tmp is not saved yet ... operate in session only
                  ContentUtil.moveInSession(object, tmp.getHandle() + "/" + object.getName());
              }
              Collection<NodeData> nodeDatas = node.getNodeDataCollection();
              for (NodeData nodeData : nodeDatas) {
                 tmp.createNodeData(nodeData.getName(), nodeData.getValue());
             }
             node.delete();
             //tmp is not saved yet ... operate in session only
             ContentUtil.moveInSession(tmp, StringUtils.removeEnd(parent.getHandle(), "/") + "/" + name);
         }
 
         public void visit(Content node) throws Exception {
             // do nothing
         }
     }
 }