/*
 * $RCSfile$
 * $Revision$
 * $Date$
 *
 * Copyright (C) 2004-2005 Jive Software. All rights reserved.
 *
 * This software is published under the terms of the GNU Public License (GPL),
 * a copy of which is included in this distribution.
 */

package org.jivesoftware.util;

import org.jivesoftware.messenger.JiveGlobals;

import javax.servlet.*;
import javax.servlet.jsp.jstl.core.Config;
import java.io.IOException;

/**
 * Sets the locale context-wide.
 */
public class LocaleFilter implements Filter {

    private ServletContext context;

    public void init(FilterConfig config) throws ServletException {
        this.context = config.getServletContext();
    }

    /**
     * Ssets the locale context-wide based on a call to {@link JiveGlobals#getLocale()}.
     */
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException
    {
        // Note, putting the locale in the application at this point is a little overkill
        // (ie, every user who hits this filter will do this). Eventually, it might make
        // sense to just set the locale in the user's session and if that's done we might
        // want to honor a preference to get the user's locale based on request headers.
        // For now, this is just a convenient place to set the locale globally.
        Config.set(context, Config.FMT_LOCALE, JiveGlobals.getLocale());

        // Move along:
        chain.doFilter(request, response);
    }

    /** Does nothing */
    public void destroy() {
    }
}
