/*
 * Copyright (C) 2005-2012 BetaCONCEPT Limited
 *
 * This file is part of Astroboa.
 *
 * Astroboa 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 3 of the License, or
 * (at your option) any later version.
 *
 * Astroboa 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 Astroboa.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.betaconceptframework.astroboa.console.jsf;

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 org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Gregory Chomatas (gchomatas@betaconcept.com)
 * @author Savvas Triantafyllou (striantafyllou@betaconcept.com)
 * 
 */
public class MessageFilter implements Filter {
	private final Logger logger = LoggerFactory.getLogger(getClass());

    public void doFilter(ServletRequest req, ServletResponse res,
                         FilterChain chain)
    throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) req;

        // grab messages from the session and put them into request
        // this is so they're not lost in a redirect
        Object message = request.getSession().getAttribute("message");

        if (message != null) {
            request.setAttribute("message", message);
            request.getSession().removeAttribute("message");
        }

        // set the requestURL as a request attribute for templates
        // particularly freemarker, which doesn't allow request.getRequestURL()
        request.setAttribute("requestURL", request.getRequestURL());
        chain.doFilter(req, res);
    }

    public void init(FilterConfig filterConfig) {
    }

    public void destroy() {
    }
}