package org.apache.turbine.modules.actions;

 /*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *   http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied.  See the License for the

  * specific language governing permissions and limitations

  * under the License.

  */

 import org.apache.fulcrum.security.util.FulcrumSecurityException;

 import org.apache.turbine.TurbineConstants;

 import org.apache.turbine.annotation.TurbineConfiguration;

 import org.apache.turbine.annotation.TurbineService;

 import org.apache.turbine.modules.Action;

 import org.apache.turbine.om.security.User;

 import org.apache.turbine.pipeline.PipelineData;

 import org.apache.turbine.services.security.SecurityService;

 import org.apache.turbine.util.RunData;

 /**

  * This action removes a user from the session. It makes sure to save

  * the User object in the session.

  *

  * @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>

  * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>

  * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a>

  * @version $Id: LogoutUser.java 1773378 2016-12-09 13:19:59Z tv $

  */

 public class LogoutUser

         extends Action

 {

     /** Injected service instance */

     @TurbineService

     private SecurityService security;

     @TurbineConfiguration( TurbineConstants.LOGOUT_MESSAGE )

     private String logoutMessage;

     @TurbineConfiguration( TurbineConstants.ACTION_LOGOUT_KEY )

     private String actionLogout = TurbineConstants.ACTION_LOGOUT_DEFAULT;

     @TurbineConfiguration( TurbineConstants.SCREEN_HOMEPAGE )

     private String screenHomepage;

     /**

      * Clears the PipelineData user object back to an anonymous status not

      * logged in, and with a null ACL.  If the tr.props ACTION_LOGIN

      * is anything except "LogoutUser", flow is transfered to the

      * SCREEN_HOMEPAGE

      *

      * If this action name is the value of action.logout then we are

      * being run before the session validator, so we don't need to

      * set the screen (we assume that the session validator will handle

      * that). This is basically still here simply to preserve old behavior

      * - it is recommended that action.logout is set to "LogoutUser" and

      * that the session validator does handle setting the screen/template

      * for a logged out (read not-logged-in) user.

      *

      * @param pipelineData Turbine information.

      * @throws FulcrumSecurityException a problem occurred in the security

      *            service.

      */

     @Override

     public void doPerform(PipelineData pipelineData)

             throws FulcrumSecurityException

     {

         RunData data = getRunData(pipelineData);

         // Session validator did not run, so RunData is not populated

         User user = data.getUserFromSession();

         if (!security.isAnonymousUser(user))

         {

             // Make sure that the user has really logged in...

             if (!user.hasLoggedIn())

             {

                 return;

             }

             user.setHasLoggedIn(Boolean.FALSE);

             security.saveUser(user);

         }

         data.setMessage(logoutMessage);

         // This will cause the acl to be removed from the session in

         // the Turbine servlet code.

         data.setACL(null);

         // Retrieve an anonymous user.

         User anonymousUser = security.getAnonymousUser();

         data.setUser(anonymousUser);

         data.save();

         // In the event that the current screen or related navigations

         // require acl info, we cannot wait for Turbine to handle

         // regenerating acl.

         data.getSession().removeAttribute(TurbineConstants.ACL_SESSION_KEY);

         // If this action name is the value of action.logout then we are

         // being run before the session validator, so we don't need to

         // set the screen (we assume that the session validator will handle

         // that). This is basically still here simply to preserve old behavior

         // - it is recommended that action.logout is set to "LogoutUser" and

         // that the session validator does handle setting the screen/template

         // for a logged out (read not-logged-in) user.

         if (!actionLogout.equals(TurbineConstants.ACTION_LOGOUT_DEFAULT))

         {

             data.setScreen(screenHomepage);

         }

     }

 }