/**
 * Copyright (C) 2009 eXo Platform SAS.
 * 
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 * 
 * This software 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.exoplatform.web;

import org.exoplatform.container.component.ComponentRequestLifecycle;
import org.exoplatform.container.component.RequestLifeCycle;
import org.exoplatform.container.web.AbstractFilter;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
import org.exoplatform.services.organization.OrganizationService;
import org.exoplatform.services.organization.User;
import org.exoplatform.services.security.ConversationState;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class CacheUserProfileFilter extends AbstractFilter
{

   /**
    * "subject".
    */
   public static final String USER_PROFILE = "UserProfile";

   /**
    * Logger.
    */
   private static Log log = ExoLogger.getLogger("core.security.SetCurrentIdentityFilter");

   public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws ServletException
   {
      ConversationState state = ConversationState.getCurrent();
      try
      {
         if (state != null)
         {
            if (log.isDebugEnabled())
               log.debug("Conversation State found, save user profile to Conversation State.");

            if (state.getAttribute(USER_PROFILE) == null)
            {
               OrganizationService orgService =
                  (OrganizationService)getContainer().getComponentInstanceOfType(OrganizationService.class);

               begin(orgService);
               User user = orgService.getUserHandler().findUserByName(state.getIdentity().getUserId());
               end(orgService);
               state.setAttribute(USER_PROFILE, user);

            }

         }
         chain.doFilter(request, response);
      }
      catch (Exception e)
      {
         log.warn("An error occured while cache user profile", e);
      }

   }

   public void destroy()
   {
   }

   public void begin(OrganizationService orgService) throws Exception
   {
      if (orgService instanceof ComponentRequestLifecycle)
      {
      	 RequestLifeCycle.begin((ComponentRequestLifecycle)orgService);
      }
   }

   public void end(OrganizationService orgService) throws Exception
   {
      if (orgService instanceof ComponentRequestLifecycle)
      {
      	 RequestLifeCycle.end();
      }
   }
}
