/*
 * Licensed to The Apereo Foundation under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for
 * additional information regarding copyright ownership.
 *
 * The Apereo Foundation licenses this file to you under the Apache License,
 * Version 2.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
*/
package org.unitime.timetable.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author Tomas Muller
 */
public class DoToActionRedirectFilter implements Filter {

	@Override
	public void init(FilterConfig config) throws ServletException {
	}


	@Override
	public void destroy() {
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		if (request instanceof HttpServletRequest && response instanceof HttpServletResponse) {
			HttpServletRequest req = (HttpServletRequest)request;
			HttpServletResponse res = (HttpServletResponse)response;
			if (req.getRequestURI().endsWith(".do")) {
				String uri = req.getRequestURI().substring(req.getContextPath().length() + 1).replace(".do", ".action");
	    		if (req.getQueryString() != null && !req.getQueryString().isEmpty())
	    			uri += "?" + req.getQueryString();		    	
				res.sendRedirect(uri);
				return;
			}
		}
		chain.doFilter(request, response);
	}

}
