/**
    * This file Copyright (c) 2012-2018 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.setup.for5_0;
  
  import info.magnolia.importexport.postprocessors.MetaDataAsMixinConversionHelper;
  import info.magnolia.jcr.util.NodeTypes;
  import info.magnolia.module.InstallContext;
  import info.magnolia.module.delta.AbstractRepositoryTask;
  import info.magnolia.module.delta.TaskExecutionException;
  import info.magnolia.objectfactory.Components;
  import info.magnolia.repository.RepositoryManager;
  
  import java.util.Collection;
  
  import javax.jcr.Node;
  import javax.jcr.NodeIterator;
  import javax.jcr.RepositoryException;
  import javax.jcr.Session;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Update task for migration content with MetaData sub nodes to instead use mixins on the content node itself.
   *
   * @see MetaDataAsMixinConversionHelper
   */
  public class ConvertMetaDataUpdateTask extends AbstractRepositoryTask {
  
      private final Logger log = LoggerFactory.getLogger(ConvertMetaDataUpdateTask.class);
  
      public ConvertMetaDataUpdateTask(String taskName, String taskDescription) {
          super(taskName, taskDescription);
      }
  
      @Override
      protected void doExecute(InstallContext installContext) throws RepositoryException, TaskExecutionException {
  
          RepositoryManager repositoryManager = Components.getComponent(RepositoryManager.class);
  
          Collection<String> workspaceNames = repositoryManager.getWorkspaceNames();
          for (String workspaceName : workspaceNames) {
              Session session = installContext.getJCRSession(workspaceName);
  
              MetaDataAsMixinConversionHelpersionHelper.html#MetaDataAsMixinConversionHelper">MetaDataAsMixinConversionHelper conversionHelper = new MetaDataAsMixinConversionHelper();
              conversionHelper.setDeleteMetaDataIfEmptied(true);
              conversionHelper.setPeriodicSaves(true);
  
              NodeIterator childRootNodes = session.getRootNode().getNodes();
              while (childRootNodes.hasNext()) {
                  Node child = childRootNodes.nextNode();
                  if (!child.getName().startsWith(NodeTypes.JCR_PREFIX) && !child.getName().startsWith(NodeTypes.REP_PREFIX)) {
                      conversionHelper.convertNodeAndChildren(child);
                  } else {
                      log.debug("Node '{}' are not handled by this task", child.getName());
                  }
              }
              log.debug("Converted MetaData in workspace [{0}]", workspaceName);
          }
      }
  }