/**
    * This file Copyright (c) 2007-2011 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.workflow.setup.for3_5;
  
  import info.magnolia.cms.core.Content;
  import info.magnolia.cms.core.ItemType;
  import info.magnolia.cms.util.ClasspathResourcesUtil;
  import info.magnolia.cms.util.ContentUtil;
  import info.magnolia.cms.util.NodeDataUtil;
  import info.magnolia.module.InstallContext;
  import info.magnolia.module.delta.AbstractTask;
  import info.magnolia.module.delta.TaskExecutionException;
  import info.magnolia.module.workflow.WorkflowConstants;
  
  import java.io.IOException;
  import java.io.InputStream;
  
  import javax.jcr.RepositoryException;
  
  import org.apache.commons.io.IOUtils;
  import org.apache.commons.lang.StringUtils;
  import org.apache.jackrabbit.value.StringValue;
  
  
  /**
   * A {@link info.magnolia.module.delta.Task} which updates the default activation workflow definition, if it still the default from previous versions.
   *
   * @author vsteller
   * @version $Id: CheckAndUpdateDefaultWorkflowDefinition.java 41137 2011-01-06 18:19:25Z gjoseph $
   */
  public class CheckAndUpdateDefaultWorkflowDefinition extends AbstractTask {
  
      public CheckAndUpdateDefaultWorkflowDefinition() {
          super("Update the default activation workflow definition", "Checks and updates the default activation workflow definition under the /modules/workflow/config/flows/activation config node.");
      }
  
      public void execute(InstallContext ctx) throws TaskExecutionException {
          InputStream stream = null;
          InputStream stream30 = null;
          try {
              stream = ClasspathResourcesUtil.getStream("info/magnolia/module/workflow/default-activation-workflow.xml");
              final String wfDef = IOUtils.toString(stream);
              stream30 = ClasspathResourcesUtil.getStream("info/magnolia/module/workflow/setup/from30/activation-workflow-from-3.0-ee-bootstrap-file.xml");
              final String wfDef30 = IOUtils.toString(stream30);
              final Content cfg = ctx.getOrCreateCurrentModuleConfigNode();
  
              final Content flows = ContentUtil.getOrCreateContent(cfg, "flows", ItemType.CONTENT);
              final Content flowNode = ContentUtil.getOrCreateContent(flows, "activation", ItemType.CONTENTNODE);
  
              if (flowNode.hasNodeData(WorkflowConstants.FLOW_VALUE)) {
                  final String oldWfDef = NodeDataUtil.getString(flowNode, WorkflowConstants.FLOW_VALUE);
                  if (StringUtils.deleteWhitespace(oldWfDef).equals(StringUtils.deleteWhitespace(wfDef30))) {
                      flowNode.setNodeData(WorkflowConstants.FLOW_VALUE, new StringValue(wfDef));
                  } else {
                      ctx.warn("The activation workflow definition has been modified. Magnolia will not update it but instead install the new workflow definition for 3.5 in /modules/workflow/config/flows/activation35. Please review the changes manually.");
                      final Content flowNode35 = flows.createContent("activation35", ItemType.CONTENTNODE);
                      flowNode35.setNodeData(WorkflowConstants.FLOW_VALUE, new StringValue(wfDef));
                  }
              } else {
                  // this case happens if we e.g. update from 3.0.x CE
                  flowNode.createNodeData(WorkflowConstants.FLOW_VALUE, wfDef);
              }
          } catch (IOException e) {
              ctx.error("Could not read default activation workflow definition", e);
          } catch (RepositoryException e) {
              ctx.error("Could not store default activation workflow definition", e);
          } finally {
              if (stream != null) {
                 try {
                     stream.close();
                     stream30.close();
                 } catch (IOException e) {
                 }
             }
         }
     }
 }