package org.apache.turbine.modules.actions;

 import org.apache.fulcrum.security.acl.AccessControlList;

 import org.apache.fulcrum.security.model.turbine.TurbineAccessControlList;

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

 import org.apache.logging.log4j.LogManager;

 /*

  * 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.logging.log4j.Logger;

 import org.apache.turbine.Turbine;

 import org.apache.turbine.TurbineConstants;

 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 doPerforms an Access Control List and places it into

  * the RunData object, so it is easily available to modules.  The ACL

  * is also placed into the session.  Modules can null out the ACL to

  * force it to be rebuilt based on more information.

  *

  * <p>

  *

  * Turbine uses a User-Role-Permission arrangement for access control.

  * Users are assigned Roles.  Roles are assigned Permissions.  Turbine

  * modules then check the Permission required for an action or

  * information with the set of Permissions currently associated with

  * the session (which are dependent on the user associated with the

  * session.)

  *

  * <p>

  *

  * The criteria for assigning Roles/Permissions is application

  * dependent, in some cases an application may change a User's Roles

  * during the session.  To achieve flexibility, the ACL takes an

  * Object parameter, which the application can use to doPerform the

  * ACL.

  *

  * <p>

  *

  * This action is special in that it should only be executed by the

  * Turbine servlet.

  *

  * @author <a href="mailto:john.mcnally@clearink.com">John D. McNally</a>

  * @author <a href="mailto:bmclaugh@algx.net">Brett McLaughlin</a>

  * @author <a href="quintonm@bellsouth.net">Quinton McCombs</a>

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

  * @version $Id: AccessController.java 1854797 2019-03-04 20:41:39Z tv $

  */

 public class AccessController implements Action

 {

     /** Logging */

     private static final Logger log = LogManager.getLogger(AccessController.class);

     /** Injected service instance */

     @TurbineService

     private SecurityService security;

     /**

      * If there is a user and the user is logged in, doPerform will

      * set the RunData ACL.  The list is first sought from the current

      * session, otherwise it is loaded through

      * <code>link {@link SecurityService#getACL(User)}</code> and added to the current

      * session.

      *

      * @param pipelineData Turbine information.

      * @throws FulcrumSecurityException problem with the security service.

      */

     @Override

     public void doPerform(PipelineData pipelineData)

             throws FulcrumSecurityException

     {

         RunData data = pipelineData.getRunData();

         User user = data.getUser();

         if (!security.isAnonymousUser(user)

             && user.hasLoggedIn())

         {

             log.debug("Fetching ACL for {}", user::getName);

             AccessControlList acl = (AccessControlList)

                     data.getSession().getAttribute(

                             TurbineConstants.ACL_SESSION_KEY);

             if (acl == null)

             {

                 log.debug("No ACL found in Session, building fresh ACL");

                 acl = security.getACL(user);

                 data.getSession().setAttribute(

                         TurbineConstants.ACL_SESSION_KEY, acl);

                 log.debug("ACL is {}", acl);

             }

             data.setACL(acl);

         }

         // Comply with Turbine 4.0 standards

         pipelineData.get(Turbine.class).put(TurbineAccessControlList.class, data.getACL());

     }

 }