content: /*
   *  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.
   */
  package org.apache.causeway.viewer.restfulobjects.viewer.webmodule.auth;
  
  import jakarta.servlet.ServletContext;
  import jakarta.servlet.ServletRequest;
  import jakarta.servlet.http.HttpServletRequest;
  import jakarta.servlet.http.HttpServletResponse;
  import jakarta.servlet.http.HttpSession;
  
  import org.springframework.web.context.support.WebApplicationContextUtils;
  
  import org.apache.causeway.commons.internal.exceptions._Exceptions;
  import org.apache.causeway.core.security.authentication.manager.AuthenticationManager;
  
  /**
   * Convenience abstract implementation.
   *
   * @since 2.0 {@index}
   */
  public abstract class AuthenticationStrategyAbstract
  implements AuthenticationStrategy {
  
      public static final int STATUS_UNAUTHORIZED = 401;
  
      private AuthenticationManager authenticationManager;
  
      protected AuthenticationManager getAuthenticationManager(ServletRequest servletRequest) {
          if(authenticationManager==null) {
              var servletContext = getServletContext(servletRequest);
              var webApplicationContext = WebApplicationContextUtils.getWebApplicationContext(servletContext);
              if(webApplicationContext==null) {
                  throw _Exceptions.illegalState("Requires a WebApplicationContext (Spring).");
              }
              authenticationManager = webApplicationContext.getBean(AuthenticationManager.class);
          }
          return authenticationManager;
      }
  
      protected HttpSession getHttpSession(ServletRequest servletRequest) {
          var httpServletRequest = (HttpServletRequest) servletRequest;
          return httpServletRequest.getSession();
      }
  
      protected ServletContext getServletContext(ServletRequest servletRequest) {
          return servletRequest.getServletContext();
      }
  
      @Override
      public final void invalidate(
              final HttpServletRequest httpServletRequest,
              final HttpServletResponse httpServletResponse) {
  
          bind(httpServletRequest, httpServletResponse, null);
          httpServletResponse.setStatus(STATUS_UNAUTHORIZED);
      }
  
  }
  