/**
 * This file Copyright (c) 2003-2008 Magnolia International
 * Ltd.  (http://www.magnolia.info). All rights reserved.
 *
 *
 * This file is dual-licensed under both the Magnolia
 * Network Agreement and the GNU General Public License.
 * You may elect to use one or the other of these licenses.
 *
 * This file is distributed in the hope that it will be
 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
 * Redistribution, except as permitted by whichever of the GPL
 * or MNA you select, is prohibited.
 *
 * 1. For the GPL license (GPL), you can redistribute and/or
 * modify this file under the terms of the GNU General
 * Public License, Version 3, as published by the Free Software
 * Foundation.  You should have received a copy of the GNU
 * General Public License, Version 3 along with this program;
 * if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 2. For the Magnolia Network Agreement (MNA), this file
 * and the accompanying materials are made available under the
 * terms of the MNA which accompanies this distribution, and
 * is available at http://www.magnolia.info/mna.html
 *
 * Any modifications to this file must keep this entire header
 * intact.
 *
 */
package info.magnolia.cms.security.auth.callback;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * This ClientCallback class enables you to display a standard cms based webpage
 * instead of the Freemarker Magnolia login form. It can be used in combination 
 * with the {@link CompositeCallback} class. Simply set the "class" attribute of
 * the pattern delegate to this class and provide the following two additional
 * attributes:
 * <ul>
 *     <li>loginForm (path to the magnolia website which contains the login form)</li>
 *     <li>realmName</li>
 * </ul>
 * <b>IMPORTANT:</b> Make sure you give the anonymous user read permissions on
 * the login page you specified.
 * @author Will Scheidegger - fastforward.ch
 */
public class WebFormClientCallback extends FormClientCallback {
    private static final Logger log = LoggerFactory.getLogger(WebFormClientCallback.class);
    
    /**
     * Overrides doCallback from info.magnolia.cms.security.auth.callback.FormClientCallback
     * in order to display a standard cms-based page instead of the Freemarker
     * login form. 
     * <b>Attention:</b> The anoymous user must have read permission
     * on the specified page.
     * @param request
     * @param response
     */
    public void doCallback(HttpServletRequest request, HttpServletResponse response) {
        log.debug("Login attempt!");
        try {
            //MgnlContext.setAttribute();
            String targetURI = request.getRequestURI();
            log.debug("URI called: " + targetURI);
            String loginURI = request.getContextPath() + getLoginForm();
            log.debug("login form URI: " + loginURI);
            loginURI += "?ol=" + targetURI;
            request.setAttribute("redirectPath", loginURI);
            response.sendRedirect(loginURI);
        } catch (Throwable t) {
            log.error("exception while writing login template", t);
        }
    }
}