/*
    * 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.shiro.web.subject.support;
  
  import org.apache.shiro.mgt.SecurityManager;
  import org.apache.shiro.session.Session;
  import org.apache.shiro.session.mgt.SessionContext;
  import org.apache.shiro.subject.PrincipalCollection;
  import org.apache.shiro.subject.support.DelegatingSubject;
  import org.apache.shiro.lang.util.StringUtils;
  import org.apache.shiro.web.session.mgt.DefaultWebSessionContext;
  import org.apache.shiro.web.session.mgt.WebSessionContext;
  import org.apache.shiro.web.subject.WebSubject;
  import org.apache.shiro.web.util.WebUtils;
  
  import javax.servlet.ServletRequest;
  import javax.servlet.ServletResponse;
  
  /**
   * Default {@link WebSubject WebSubject} implementation that additional ensures the ability to retain a
   * servlet request/response pair to be used by internal shiro components as necessary during the request execution.
   *
   * @since 1.0
   */
  public class WebDelegatingSubject extends DelegatingSubject implements WebSubject {
  
      private static final long serialVersionUID = -1655724323350159250L;
  
      private final ServletRequest servletRequest;
      private final ServletResponse servletResponse;
  
      public WebDelegatingSubject(PrincipalCollection principals, boolean authenticated,
                                  String host, Session session,
                                  ServletRequest request, ServletResponse response,
                                  SecurityManager securityManager) {
          this(principals, authenticated, host, session, true, request, response, securityManager);
      }
  
      //since 1.2
      public WebDelegatingSubject(PrincipalCollection principals, boolean authenticated,
                                  String host, Session session, boolean sessionEnabled,
                                  ServletRequest request, ServletResponse response,
                                  SecurityManager securityManager) {
          super(principals, authenticated, host, session, sessionEnabled, securityManager);
          this.servletRequest = request;
          this.servletResponse = response;
      }
  
      public ServletRequest getServletRequest() {
          return servletRequest;
      }
  
      public ServletResponse getServletResponse() {
          return servletResponse;
      }
  
      /**
       * Returns {@code true} if session creation is allowed  (as determined by the super class's
       * {@link super#isSessionCreationEnabled()} value and no request-specific override has disabled sessions for this subject,
       * {@code false} otherwise.
       * <p/>
       * This means session creation is disabled if the super {@link super#isSessionCreationEnabled()} property is {@code false}
       * or if a request attribute is discovered that turns off sessions for the current request.
       *
       * @return {@code true} if session creation is allowed  (as determined by the super class's
       * {@link super#isSessionCreationEnabled()} value and no request-specific override has disabled sessions for this
       * subject, {@code false} otherwise.
       * @since 1.2
       */
      @Override
      protected boolean isSessionCreationEnabled() {
          boolean enabled = super.isSessionCreationEnabled();
          return enabled && WebUtils.isSessionCreationEnabled(this);
      }
  
      @Override
      protected SessionContext createSessionContext() {
          WebSessionContext wsc = new DefaultWebSessionContext();
          String host = getHost();
          if (StringUtils.hasText(host)) {
              wsc.setHost(host);
          }
          wsc.setServletRequest(this.servletRequest);
         wsc.setServletResponse(this.servletResponse);
         return wsc;
     }
 }