/*
 * LogOffAction.java
 * 
 * 
 * Created on 09 de Dezembro de 2002, 16:37
 * 
 * 
 * Autores : - Nuno Nunes (nmsn@rnl.ist.utl.pt) - Joana Mota
 * (jccm@rnl.ist.utl.pt)
 *  
 */

package net.sourceforge.fenixedu.presentationTier.Action.commons;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import net.sourceforge.fenixedu._development.PropertiesManager;
import net.sourceforge.fenixedu.presentationTier.servlets.filters.I18NFilter;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

public class LogOffAction extends Action {

    private static final boolean useCASAuthentication;

    static {
        useCASAuthentication = Boolean.valueOf(PropertiesManager.getProperty("cas.enabled"));
    }

    public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request,
            HttpServletResponse response) throws Exception {

        ActionForward result = null;

        if (useCASAuthentication) {
            if (request.getParameter("logoutFromCAS") != null
                    && request.getParameter("logoutFromCAS").equals("true")) {
                killSession(request);
                result = mapping.findForward("showBlankPage");
            } else {
                result = getCasLogoutActionForward();
            }
        } else {
            killSession(request);
            result = mapping.findForward("showLoginPage");
        }
        // this way, we always put the locale as the default we want
        I18NFilter.setDefaultLocale(request, request.getSession());
        return result;
    }

    private ActionForward getCasLogoutActionForward() {
        ActionForward actionForward = new ActionForward();

        actionForward.setRedirect(true);
        actionForward.setPath(PropertiesManager.getProperty("cas.logoutUrl"));

        return actionForward;
    }

    private void killSession(HttpServletRequest request) {
        HttpSession session = request.getSession(false);
        if (session != null) {
            session.invalidate();
        }
    }

}