/**
    * This file Copyright (c) 2010-2014 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.templates;
  
  import java.util.Collection;
  import java.util.Iterator;
  
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  import javax.jcr.UnsupportedRepositoryOperationException;
  import javax.jcr.version.Version;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import info.magnolia.cms.core.Content;
  import info.magnolia.cms.core.ItemType;
  import info.magnolia.cms.core.version.ContentVersion;
  import info.magnolia.cms.security.AccessDeniedException;
  import info.magnolia.cms.util.ContentUtil;
  import info.magnolia.cms.util.ContentWrapper;
  import info.magnolia.module.admininterface.VersionUtil;
  import info.magnolia.rendering.model.RenderingModel;
  import info.magnolia.rendering.model.RenderingModelImpl;
  import info.magnolia.rendering.template.RenderableDefinition;
  
  public class MgnlDeletedTemplateModel extends RenderingModelImpl<RenderableDefinition> {
  
      private static final Logger log = LoggerFactory.getLogger(MgnlDeletedTemplateModel.class);
  
      public MgnlDeletedTemplateModel(Node content, RenderableDefinition definition, RenderingModel<RenderableDefinition> parent) {
          super(content, definition, parent);
      }
  
      public String getLastVersion() {
          Collection<Version> allVersions = null;
  
          Iterator<Version> iterator = null;
          Content maybeVersion = ContentUtil.asContent(getNode());
          Content content = ContentUtil.asContent(getNode());
          try {
              try {
                  allVersions = VersionUtil.getSortedNotDeletedVersions(content);
              } catch (AccessDeniedException e) {
                  // Either change the ContentVersion API to delegate call to getAllVersions() to the underlying real node or do this. There is no save way of finding the node is a version since it can be wrapped by multiple different wrappers
                  while (maybeVersion != null && maybeVersion instanceof ContentWrapper) {
                      maybeVersion = ((ContentWrapper) maybeVersion).getWrappedContent();
                  }
                  if (maybeVersion instanceof ContentVersion) {
                      String versionName = ((ContentVersion) maybeVersion).getVersionLabel();
                      content = maybeVersion.getHierarchyManager().getContent(maybeVersion.getHandle());
                      allVersions = VersionUtil.getSortedNotDeletedVersionsBefore(content, versionName);
                  }
              }
  
              if (allVersions == null || allVersions.isEmpty()) {
                  return null;
              }
              return allVersions.iterator().next().getName();
          } catch (UnsupportedRepositoryOperationException e) {
              // if this node doesn't support versioning it can't be undeleted ... nor can we display previous version of the content
              log.error("Failed to retrieve version history for " + content.getHandle() + ". This node doesn't support versioning", e);
          } catch (RepositoryException e) {
              log.error("Failed to retrieve version history for " + content.getHandle() + "", e);
          }
          return null;
      }
  
      public boolean hasChildren() throws RepositoryException {
         return getNode().hasNode(ItemType.CONTENT.getSystemName());
     }
 
     public String getDeletionAuthor() throws RepositoryException {
         return getNode().getProperty("mgnl:deletedBy").getString();
     }
 
     public String getDeletionDate() throws RepositoryException {
         return getNode().getProperty("mgnl:deletedOn").getString();
     }
 }