/**
 * Copyright (C) 2009 eXo Platform SAS.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.exoplatform.services.html.path;

import org.exoplatform.services.html.HTMLDocument;
import org.exoplatform.services.html.HTMLNode;
import org.exoplatform.services.html.parser.HTMLParser;
import org.exoplatform.services.html.path.NodePath.Index;

import java.util.ArrayList;
import java.util.List;

/**
 *  Author : Nhu Dinh Thuan
 *          Email:nhudinhthuan@yahoo.com
 * Aug 15, 2006
 */
public class NodePathUtil
{

   public synchronized static NodePath[] toNodePath(String[] paths) throws Exception
   {
      NodePath[] values = new NodePath[paths.length];
      for (int i = 0; i < paths.length; i++)
      {
         values[i] = NodePathParser.toPath(paths[i]);
      }
      return values;
   }

   public synchronized static void remove(HTMLNode root, NodePath[] paths)
   {
      if (paths == null)
         return;
      List<HTMLNode> list = new ArrayList<HTMLNode>();
      for (NodePath path : paths)
      {
         HTMLNode element = lookFor(root, path);
         if (element != null)
            list.add(element);
      }
      for (HTMLNode element : list)
      {
         HTMLNode parent = element.getParent();
         parent.getChildren().remove(element);
      }
   }

   public synchronized static HTMLDocument create(HTMLNode root, NodePath[] paths)
   {
      HTMLNode html = HTMLParser.clone(root);
      for (NodePath path : paths)
      {
         HTMLNode element = lookFor(root, path);
         if (element != null)
            html.addChild(element);
      }
      HTMLDocument document = new HTMLDocument();
      document.setRoot(html);
      return document;
   }

   public synchronized static HTMLNode lookFor(HTMLNode root, NodePath path)
   {
      if (path == null)
         return null;
      Index[] indexs = path.getIndexs();
      List<HTMLNode> children = root.getChildren();
      if (children == null)
         return null;
      int count;
      for (int i = 0; i < indexs.length - 1; i++)
      {
         count = 0;
         for (int j = 0; j < children.size(); j++)
         {
            if (children.get(j).isNode(indexs[i].getName()))
            {
               if (indexs[i].getIdx() == count)
               {
                  root = children.get(j);
                  children = root.getChildren();
                  break;
               }
               count++;
            }
         }
      }
      count = 0;
      for (int j = 0; j < children.size(); j++)
      {
         if (children.get(j).isNode(indexs[indexs.length - 1].getName()))
         {
            if (indexs[indexs.length - 1].getIdx() == count)
               return children.get(j);
            count++;
         }
      }
      return null;
   }

}
