/***************************************************************************
 * Copyright (C) 2003-2009 eXo Platform SAS.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see<http://www.gnu.org/licenses/>.
 *
 **************************************************************************/
package org.exoplatform.ecm.webui.component.explorer.control.filter;

import java.util.Map;

import javax.jcr.Node;

import org.exoplatform.ecm.webui.utils.PermissionUtil;
import org.exoplatform.ecm.webui.utils.Utils;
import org.exoplatform.webui.ext.filter.UIExtensionAbstractFilter;
import org.exoplatform.webui.ext.filter.UIExtensionFilterType;

/**
 * Created by The eXo Platform SARL
 * Author : Hoang Van Hung
 *          hunghvit@gmail.com
 * Aug 6, 2009
 */
public class CanDeleteNodeFilter  extends UIExtensionAbstractFilter {

  public CanDeleteNodeFilter() {
    this("UIActionBar.msg.node-checkedin");
  }

  public CanDeleteNodeFilter(String messageKey) {
    super(messageKey, UIExtensionFilterType.MANDATORY);
  }

  public boolean accept(Map<String, Object> context) throws Exception {
    if (context==null) return true;
    Node currentNode = (Node) context.get(Node.class.getName());
    
    // in case exo:actions are in checked items in Trash. return false.
    if (Utils.EXO_ACTIONS.equals(currentNode.getName()) && Utils.isInTrash(currentNode)) {
      return false;
    } else {
      return (PermissionUtil.canRemoveNode(currentNode))&&
                    (!isVersionableOrAncestor(currentNode) ||
                    (isVersionableOrAncestor(currentNode) &&
                    IsCheckedOutFilter.isCheckedOut(currentNode))); 
    }
  }

  public void onDeny(Map<String, Object> context) throws Exception {
  }

  private boolean isVersionableOrAncestor(Node node) throws Exception {
    return Utils.isVersionable(node) ||
           IsVersionableOrAncestorFilter.isAncestorVersionable(node);
  }
}
