/**
    * This file Copyright (c) 2013-2014 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.security.app.dialog.field;
  
  import info.magnolia.jcr.util.NodeTypes;
  import info.magnolia.ui.form.field.factory.AbstractFieldFactory;
  import info.magnolia.ui.form.field.definition.FieldDefinition;
  import info.magnolia.ui.vaadin.integration.jcr.AbstractJcrNodeAdapter;
  import info.magnolia.ui.vaadin.integration.jcr.JcrNewNodeAdapter;
  import info.magnolia.ui.vaadin.integration.jcr.JcrNodeAdapter;
  
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  
  import com.vaadin.data.Item;
  
  /**
   * Abstract super class for field builder that provide fields for editing ACLs.
   *
   * @param <D> definition type
   */
  public abstract class AbstractAccessFieldFactory<D extends FieldDefinition> extends AbstractFieldFactory<D, Object> {
  
      protected AbstractAccessFieldFactory(D definition, Item relatedFieldItem) {
          super(definition, relatedFieldItem);
      }
  
      protected AbstractJcrNodeAdapter getOrAddAclItem(JcrNodeAdapter roleItem, String aclName) throws RepositoryException {
          AbstractJcrNodeAdapter aclItem = roleItem.getChild(aclName);
          if (aclItem == null) {
              Node roleNode = roleItem.getJcrItem();
              if (roleItem instanceof JcrNewNodeAdapter || !roleNode.hasNode(aclName)) {
                  aclItem = new JcrNewNodeAdapter(roleNode, NodeTypes.ContentNode.NAME);
                  aclItem.setNodeName(aclName);
                  roleItem.addChild(aclItem);
              } else {
                  Node aclNode = roleNode.getNode(aclName);
                  aclItem = new JcrNodeAdapter(aclNode);
                  roleItem.addChild(aclItem);
              }
          }
          return aclItem;
      }
  
      protected JcrNewNodeAdapter addAclEntryItem(AbstractJcrNodeAdapter aclItem) throws RepositoryException {
          JcrNewNodeAdapter newItem = new JcrNewNodeAdapter(aclItem.getJcrItem(), NodeTypes.ContentNode.NAME);
          newItem.setNodeName(getUniqueNodeNameForChild(aclItem));
          aclItem.addChild(newItem);
          return newItem;
      }
  
      protected String getUniqueNodeNameForChild(AbstractJcrNodeAdapter parentItem) throws RepositoryException {
  
          // The adapter cannot handle more than one unnamed child, see MGNLUI-1459, so we have to generate unique ones
  
          Node parentNode = null;
          if (!(parentItem instanceof JcrNewNodeAdapter)) {
              parentNode = parentItem.getJcrItem();
          }
  
          int newNodeName = 0;
          while (true) {
              if (parentItem.getChild(String.valueOf(newNodeName)) != null) {
                  newNodeName++;
                  continue;
              }
              if (parentNode != null && parentNode.hasNode(String.valueOf(newNodeName))) {
                  newNodeName++;
                 continue;
             }
             break;
         }
 
         return String.valueOf(newNodeName);
     }
 }