/**
    * 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.admininterface.setup.for4_0;
  
  import info.magnolia.cms.beans.config.ContentRepository;
  import info.magnolia.cms.core.Content;
  import info.magnolia.cms.core.HierarchyManager;
  import info.magnolia.cms.core.ItemType;
  import info.magnolia.cms.util.NodeDataUtil;
  import info.magnolia.cms.util.QueryUtil;
  import info.magnolia.module.InstallContext;
  import info.magnolia.module.delta.AbstractRepositoryTask;
  import info.magnolia.module.delta.TaskExecutionException;
  import org.apache.commons.lang.StringUtils;
  
  import javax.jcr.RepositoryException;
  import java.util.Collection;
  import java.util.Iterator;
  
  /**
   * In 4.0 and 4.1, we accidentally overrode the default uri mapping on public instances to the "Quickstart" page,
   * even if templates were present.
   * This task simply warns the user if that hasn't been fixed in the meantime.
   */
  public class UpdatedDefaultPublicURIWarning extends AbstractRepositoryTask {
  
      public UpdatedDefaultPublicURIWarning() {
          super("Checks the default public URI is correct", "Warns the user if the URI has been changed wrongly.");
      }
  
      protected void doExecute(InstallContext installContext) throws RepositoryException, TaskExecutionException {
          if (templatesExist() && hasDefaultURI(installContext)) {
              installContext.warn("Please set the default virtual URI mapping; it was incorrectly reset by a previous update.");
          }
      }
  
      /**
       * Check if at least one template is visible in the system.
       */
      private boolean templatesExist() {
          Collection nodeCollection = QueryUtil.query(ContentRepository.CONFIG, "select * from mgnl:content where jcr:path like '/modules/%/templates'");
          Iterator nodesCollectionIt = nodeCollection.iterator();
          while (nodesCollectionIt.hasNext()) {
              Content templatesNode = (Content) nodesCollectionIt.next();
              Iterator templatesCollectionIt = templatesNode.getChildren(ItemType.CONTENTNODE).iterator();
              while (templatesCollectionIt.hasNext()) {
                  Content template = (Content) templatesCollectionIt.next();
                  if (NodeDataUtil.getBoolean(template, "visible", false)) {
                      return true;
                  }
              }
          }
          return false;
      }
  
      private boolean hasDefaultURI(InstallContext installContext) throws RepositoryException {
          final String defaultURI = installContext.getCurrentModuleDefinition().getProperty("defaultPublicURI");
  
          final String defaultUriMappingPath = "/modules/adminInterface/virtualURIMapping/default/toURI";
          final HierarchyManager hm = installContext.getConfigHierarchyManager();
          if (hm.isExist(defaultUriMappingPath)) {
              final String currentValue = hm.getNodeData(defaultUriMappingPath).getString();
              if (StringUtils.equals(currentValue, defaultURI)) {
                  return true;
              }
          }
          return false;
      }
 
 }