/**
    * This file Copyright (c) 2010-2011 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.admininterface.commands;
  
  import java.util.Calendar;
  import javax.jcr.PathNotFoundException;
  import javax.jcr.RepositoryException;
  import javax.jcr.UnsupportedRepositoryOperationException;
  
  import info.magnolia.cms.core.Content;
  import info.magnolia.cms.core.ItemType;
  import info.magnolia.cms.core.MetaData;
  import info.magnolia.cms.core.NodeData;
  import info.magnolia.cms.exchange.ActivationManagerFactory;
  import info.magnolia.cms.exchange.Subscriber;
  import info.magnolia.cms.i18n.MessagesManager;
  import info.magnolia.cms.security.AccessDeniedException;
  import info.magnolia.cms.util.ExclusiveWrite;
  import info.magnolia.context.Context;
  import info.magnolia.context.MgnlContext;
  import info.magnolia.module.admininterface.commands.BaseRepositoryCommand;
  
  
  public class MarkNodeAsDeletedCommand extends BaseRepositoryCommand {
  
      public static final String DELETED_NODE_TEMPLATE = "mgnlDeleted";
  
      public static final String DELETED_NODE_DELETED_BY = "mgnl:deletedBy";
      public static final String DELETED_NODE_DELETED_ON = "mgnl:deletedOn";
  
      private static final String DELETED_NODE_PROP_NAME = "deleteNode";
  
      private boolean versionManually = true;
  
      @Override
      public boolean execute(Context context) throws Exception {
  
          final Content parentNode = getNode(context);
          final Content node = parentNode.getContent((String) context.get(DELETED_NODE_PROP_NAME));
          boolean hasActiveSubscriber = false;
          for (Subscriber subscriber : ActivationManagerFactory.getActivationManager().getSubscribers()) {
              if (subscriber.isActive()) {
                  hasActiveSubscriber = true;
                  break;
              }
          }
          if (hasActiveSubscriber) {
              preDeleteNode(node, context);
          } else {
              node.delete();
              parentNode.save();
          }
  
          return true;
      }
  
      private void preDeleteNode(Content node, Context context) throws RepositoryException, AccessDeniedException {
          // TODO: versioning might be "unsupported" do we still purge in such case?
          version(node, context);
          synchronized (ExclusiveWrite.getInstance()) {
              markAsDeleted(node);
              purgeContent(node);
              storeDeletionInfo(node, context);
              // save changes before progressing on sub node - means we can't roll back, but session doesn't grow out of limits
              node.save();
          }
          for(Content childPage : node.getChildren(ItemType.CONTENT)) {
              preDeleteNode(childPage, context);
         }
     }
 
     private void storeDeletionInfo(Content node, Context context) throws AccessDeniedException, PathNotFoundException, RepositoryException {
         node.setNodeData(DELETED_NODE_DELETED_BY, MgnlContext.getUser().getName());
         node.setNodeData(DELETED_NODE_DELETED_ON, Calendar.getInstance());
         String comment = (String) context.get("comment");
         if (comment == null) {
             comment = MessagesManager.get("versions.comment.restore");
         }
         node.getMetaData().setProperty(Context.ATTRIBUTE_COMMENT, comment);
     }
 
     private void version(Content node, Context context) throws UnsupportedRepositoryOperationException, RepositoryException {
         if (versionManually) {
             synchronized (ExclusiveWrite.getInstance()) {
                 String comment = (String) context.get("comment");
                 if (comment == null) {
                     comment = MessagesManager.get("versions.comment.deleted");
                 }
                 node.getMetaData().setProperty(Context.ATTRIBUTE_COMMENT, comment);
                 node.save();
             }
             node.addVersion();
         }
     }
 
     protected void markAsDeleted(Content node) throws RepositoryException, AccessDeniedException {
         // add mixin
         node.addMixin(ItemType.DELETED_NODE_MIXIN);
         // change template
         MetaData metadata = node.getMetaData();
         metadata.setTemplate(DELETED_NODE_TEMPLATE);
         if (metadata.getActivationStatus() != MetaData.ACTIVATION_STATUS_NOT_ACTIVATED) {
             metadata.setModificationDate();
         }
     }
 
     protected void purgeContent(Content node) throws RepositoryException {
         // delete paragraphs & collections
         for (Content child : node.getChildren(ItemType.CONTENTNODE.getSystemName())) {
             child.delete();
         }
         // delete properties (incl title ??)
         for (NodeData prop : node.getNodeDataCollection()) {
             prop.delete();
         }
     }
 
     public boolean isVersionManually() {
         return versionManually;
     }
 
     public void setVersionManually(boolean versionManually) {
         this.versionManually = versionManually;
     }
 
 }