/*
    * 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.samples;
  
  import org.apache.shiro.SecurityUtils;
  import org.apache.shiro.subject.PrincipalCollection;
  import org.apache.shiro.subject.Subject;
  import org.apache.shiro.util.CollectionUtils;
  import org.springframework.stereotype.Controller;
  import org.springframework.ui.Model;
  import org.springframework.web.bind.annotation.RequestMapping;
  
  import javax.servlet.http.HttpServletRequest;
  import java.util.Collection;
  import java.util.Map;
  
  @Controller
  public class HelloController {
  
      @SuppressWarnings("Duplicates")
      @RequestMapping("/")
      public String home(HttpServletRequest request, Model model) {
  
          String name = "World";
  
          Subject subject = SecurityUtils.getSubject();
  
          PrincipalCollection principalCollection = subject.getPrincipals();
  
          if (principalCollection != null && !principalCollection.isEmpty()) {
              Collection<Map> principalMaps = subject.getPrincipals().byType(Map.class);
              if (CollectionUtils.isEmpty(principalMaps)) {
                  name = subject.getPrincipal().toString();
              }
              else {
                  name = (String) principalMaps.iterator().next().get("username");
              }
          }
  
          model.addAttribute("name", name);
  
          return "hello";
      }
  
  }