001/*
002 * (C) Copyright 2006-2007 Nuxeo SAS <http://nuxeo.com> and others
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the Eclipse Public License v1.0
006 * which accompanies this distribution, and is available at
007 * http://www.eclipse.org/legal/epl-v10.html
008 *
009 * Contributors:
010 *     Jean-Marc Orliaguet, Chalmers
011 *
012 * $Id$
013 */
014
015package org.nuxeo.theme.html.servlets;
016
017import java.io.IOException;
018
019import javax.servlet.http.Cookie;
020import javax.servlet.http.HttpServlet;
021import javax.servlet.http.HttpServletRequest;
022import javax.servlet.http.HttpServletResponse;
023
024public final class NegotiationSelector extends HttpServlet {
025
026    private static final long serialVersionUID = 1L;
027
028    @Override
029    protected void doGet(final HttpServletRequest request, final HttpServletResponse response) throws IOException {
030        doPost(request, response);
031    }
032
033    @Override
034    protected void doPost(final HttpServletRequest request, final HttpServletResponse response) throws IOException {
035
036        final String referrer = request.getHeader("referer");
037        if (referrer == null) {
038            response.getWriter().write("no referrer found");
039            return;
040        }
041
042        final String engine = request.getParameter("engine");
043        if (engine != null) {
044            response.addCookie(createCookie("nxthemes.engine", engine));
045        }
046
047        final String mode = request.getParameter("mode");
048        if (mode != null) {
049            response.addCookie(createCookie("nxthemes.mode", mode));
050        }
051
052        final String theme = request.getParameter("theme");
053        if (theme != null) {
054            response.addCookie(createCookie("nxthemes.theme", theme));
055        }
056
057        final String perspective = request.getParameter("perspective");
058        if (perspective != null) {
059            response.addCookie(createCookie("nxthemes.perspective", perspective));
060        }
061
062        response.sendRedirect(referrer);
063    }
064
065    private Cookie createCookie(final String name, final String value) {
066        final Cookie cookie = new Cookie(name, value);
067
068        // remove the cookie of the value is an empty string
069        if (value.equals("")) {
070            cookie.setMaxAge(0);
071        }
072        cookie.setPath("/");
073        return cookie;
074    }
075}