/*
    * This software was designed and created by Jason Carroll.
    * Copyright (c) 2002, 2003, 2004 Jason Carroll.
    * The author can be reached at jcarroll@cowsultants.com
    * ITracker website: http://www.cowsultants.com
    * ITracker forums: http://www.cowsultants.com/phpBB/index.php
    *
    * This program is free software; you can redistribute it and/or modify
    * it only under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program 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 General Public License for more details.
   */
  
  package org.itracker.web.actions.user;
  
  import java.io.IOException;
  
  import javax.servlet.ServletException;
  import javax.servlet.http.Cookie;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import javax.servlet.http.HttpSession;
  
  import org.apache.log4j.Logger;
  import org.apache.struts.action.ActionForm;
  import org.apache.struts.action.ActionForward;
  import org.apache.struts.action.ActionMapping;
  import org.itracker.model.User;
  import org.itracker.web.actions.base.ItrackerBaseAction;
  import org.itracker.web.util.Constants;
  import org.itracker.web.util.SessionManager;
  
  
  
  public class LogoffAction extends ItrackerBaseAction {
  	private static final Logger log = Logger.getLogger(LogoffAction.class);
  	
      
      public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          try {
              
              HttpSession session = request.getSession(true);
              User user = (User) session.getAttribute("user");
              String login = (user != null ? user.getLogin() : "UNKNOWN");
  
              if(clearSession(login, request, response)) {
                  log.info("User " + login + " logged out successfully.");
              }
          } catch(Exception e) {
          	if (log.isDebugEnabled())
          		log.debug("execute: Error logging out user. " + e.getMessage());
          }
          
          String pageTitleKey = "itracker.web.login.title";
          String pageTitleArg = "";
          request.setAttribute("pageTitleKey",pageTitleKey);
          request.setAttribute("pageTitleArg",pageTitleArg);
          
          return mapping.findForward("login");
      }
      
      public boolean clearSession(String login, HttpServletRequest request, HttpServletResponse response) {
          try {
          	
      		Cookie cookie = new Cookie(Constants.COOKIE_NAME, "");
      		cookie.setPath(request.getContextPath());
  			if (log.isDebugEnabled()) {
  				log.debug("clearSession: remove autologin cookie");
  			}
  			cookie.setValue("");
  			cookie.setMaxAge(0);
  		
  			response.addCookie(cookie);
          	
              HttpSession session = request.getSession(true);
              session.invalidate();
              
              if(login != null) {
                  SessionManager.invalidateSession(login);
              }
          } catch(Exception e) {
              log.debug("Unable to clear session for user " + (login == null ? "UNKNOWN" : login));
              return false;
          }
          return true;
      }
  }