/**
    * This file Copyright (c) 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.demoproject.setup;
  
  import info.magnolia.cms.security.Group;
  import info.magnolia.cms.security.GroupManager;
  import info.magnolia.cms.security.SecuritySupport;
  import info.magnolia.jcr.wrapper.JCRMgnlPropertiesFilteringNodeWrapper;
  import info.magnolia.module.InstallContext;
  import info.magnolia.module.delta.AbstractRepositoryTask;
  import info.magnolia.module.delta.TaskExecutionException;
  import info.magnolia.repository.RepositoryConstants;
  
  import java.util.LinkedList;
  import java.util.List;
  
  import javax.jcr.Node;
  import javax.jcr.Property;
  import javax.jcr.PropertyIterator;
  import javax.jcr.RepositoryException;
  import javax.jcr.Session;
  
  /**
   * 'demo-project-publisher' ends up having an outdated reference to the publisher group, which got bootstrapped with 5.0
   * fresh installs. This task takes care of removing it, in case it actually is a stale reference.
   */
  public class RemoveLegacyGroupReferenceTask extends AbstractRepositoryTask {
  
  
      final private String PUBLISHER_GROUPS_PATH = "/demo-project-publishers/groups";
      static final public String PUBLISHER_NEW_UUID = "14540bfe-4e6f-4920-88d5-534d16156ca3";
      static final public String PUBLISHER_LEGACY_UUID = "ea7603eb-fa77-4a81-97e4-906f6da22588";
  
      final private List<String> PUBLISHER_UUIDs = new LinkedList<String>() {{
          add(PUBLISHER_NEW_UUID);
          add(PUBLISHER_LEGACY_UUID);
      }};
  
      private SecuritySupport securitySupport;
  
      public RemoveLegacyGroupReferenceTask(SecuritySupport securitySupport) {
          super("Remove group reference", "Remove legacy group reference from demo-project-publishers");
          this.securitySupport = securitySupport;
      }
  
      @Override
      protected void doExecute(InstallContext installContext) throws RepositoryException, TaskExecutionException {
          GroupManager groupManager = securitySupport.getGroupManager();
          Group group = groupManager.getGroup("publishers");
          if (group == null) {
              return;
          }
  
          Session session = installContext.getJCRSession(RepositoryConstants.USER_GROUPS);
          if (session.itemExists(PUBLISHER_GROUPS_PATH)) {
              Node groupsNode = new JCRMgnlPropertiesFilteringNodeWrapper(session.getNode(PUBLISHER_GROUPS_PATH));
  
              PropertyIterator it = groupsNode.getProperties();
              while (it.hasNext()) {
                  Property groupProperty = it.nextProperty();
                  String uuid = groupProperty.getValue().getString();
                  if (PUBLISHER_UUIDs.contains(uuid) && !uuid.equals(group.getId())) {
                      groupProperty.remove();
                  }
              }
          }
      }
  }