/**
 * Warlock, the open-source cross-platform game client
 *  
 * Copyright 2008, Warlock LLC, and individual contributors as indicated
 * by the @authors tag. 
 *
 * 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 cc.warlock.core.stormfront.xml;

import java.io.IOException;
import java.io.InputStream;
import java.io.Writer;
import java.util.EmptyStackException;
import java.util.Stack;

import cc.warlock.core.stormfront.internal.ParseException;
import cc.warlock.core.stormfront.internal.StormFrontProtocolParser;

public class StormFrontDocument implements IStormFrontXMLHandler {

	protected Stack<StormFrontElement> elementStack = new Stack<StormFrontElement>();
	protected StormFrontElement rootElement;

	public StormFrontElement getRootElement() {
		return rootElement;
	}
	
	public StormFrontDocument (InputStream stream)
	{
		StormFrontProtocolParser parser = new StormFrontProtocolParser(stream);
		parser.setHandler(this);
		
		try {
			parser.Document();
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	public void startElement(String name, StormFrontAttributeList attributes, String rawXML) {
		StormFrontElement currentElement = new StormFrontElement(name);
		for (StormFrontAttribute attribute : attributes.getList())
		{
			currentElement.addAttribute(attribute);
		}
		
		if (rootElement == null)
		{
			rootElement = currentElement;
		}
		else
		{
			if (elementStack.size() > 0)
			{
				elementStack.peek().addElement(currentElement);
			}
		}

		elementStack.push(currentElement);
	}
	
	public void characters(String characters) {
		// Check if there is an element to apply this to, 
		//   if not it's probably outside the root element so we ignore it.
		try {
			StormFrontElement element = elementStack.peek();
			element.appendText(characters);
		} catch(EmptyStackException e) {
			// We're outside of a tag, do nothing
		}
	}
	
	public void endElement(String name, String rawXML) {
		elementStack.pop();
	}
	
	public void saveTo (Writer writer, boolean prettyPrint)
	{
		try {
			writer.append(rootElement.toXML("", prettyPrint, true));
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}