/**
    * This file Copyright (c) 2012-2013 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.action;
  
  import info.magnolia.jcr.util.NodeTypes;
  import info.magnolia.jcr.util.NodeUtil;
  import info.magnolia.jcr.util.PropertyUtil;
  import info.magnolia.ui.admincentral.dialog.action.SaveDialogAction;
  import info.magnolia.ui.admincentral.dialog.action.SaveDialogActionDefinition;
  import info.magnolia.ui.api.action.ActionExecutionException;
  import info.magnolia.ui.form.EditorCallback;
  import info.magnolia.ui.form.EditorValidator;
  import info.magnolia.ui.vaadin.integration.jcr.JcrNodeAdapter;
  
  import javax.jcr.Node;
  import javax.jcr.PropertyIterator;
  import javax.jcr.RepositoryException;
  
  import org.apache.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.vaadin.data.Item;
  
  /**
   * Save group dialog action.
   */
  public class SaveGroupDialogAction extends SaveDialogAction {
  
      private static final Logger log = LoggerFactory.getLogger(SaveGroupDialogAction.class);
  
      public SaveGroupDialogAction(SaveDialogActionDefinition definition, Item item, EditorValidator validator, EditorCallback callback) {
          super(definition, item, validator, callback);
      }
  
      @Override
      public void execute() throws ActionExecutionException {
          // First Validate
          validator.showValidation(true);
          if (validator.isValid()) {
              final JcrNodeAdapter itemChanged = (JcrNodeAdapter) item;
  
              try {
                  final Node node = itemChanged.applyChanges();
                  // the roles (that are assigned to this group) and groups (this group belongs to) handling has to be added here
                  // GROUPS
                  try {
                      replacePropertyWithSubnode(node, "groups", itemPropertyToArray(itemChanged, "groups"));
                  } catch (RepositoryException ex) {
                      log.error(ex.getMessage(), ex);
                      throw new ActionExecutionException(ex.getMessage(), ex);
                  }
                  // ROLES
                  try {
                      replacePropertyWithSubnode(node, "roles", itemPropertyToArray(itemChanged, "roles"));
                  } catch (RepositoryException ex) {
                      log.error(ex.getMessage(), ex);
                      throw new ActionExecutionException(ex.getMessage(), ex);
                  }
                  // THE REST
                  node.getSession().save();
              } catch (final RepositoryException e) {
                  throw new ActionExecutionException(e);
              }
              callback.onSuccess(getDefinition().getName());
  
          } else {
              // validation errors are displayed in the UI.
         }
     }
 
     private String[] itemPropertyToArray(JcrNodeAdapter item, String propertyName) {
         String identifiers = item.getItemProperty(propertyName).getValue().toString();
         identifiers = StringUtils.remove(identifiers, '[');
         identifiers = StringUtils.remove(identifiers, ']');
         return StringUtils.split(identifiers, ',');
     }
 
     private void replacePropertyWithSubnode(Node node, String name, String[] ids) throws RepositoryException {
         try {
             node.getProperty(name).remove();
         } catch (RepositoryException ex) {
             log.warn("Cannot remove [" + name + "] property of the group [" + node.getName() + "]: " + ex.getMessage());
         }
         try {
             // create subnode (or get it, if it already exists)
             Node subnode = NodeUtil.createPath(node, name, NodeTypes.ContentNode.NAME);
             // sanity: remove all possible non-jcr properties
             PropertyIterator pi = subnode.getProperties();
             while (pi.hasNext()) {
                 javax.jcr.Property p = pi.nextProperty();
                 if (!p.getName().startsWith(NodeTypes.JCR_PREFIX) && !p.getName().startsWith(NodeTypes.MGNL_PREFIX)) {
                     p.remove();
                 }
             }
             // add new groups
             int i = 0;
             for (String id : ids) {
                 PropertyUtil.setProperty(subnode, "" + i, id.trim());
                 i++;
             }
         } catch (RepositoryException ex) {
             log.error("Error saving assigned " + name + " of the [" + node.getName() + "] group.", ex);
             throw new RepositoryException("Error saving assigned " + name + " of the [" + node.getName() + "] group.", ex);
         }
     }
 
 }