content: /*
   * Solo - A small and beautiful blogging system written in Java.
   * Copyright (c) 2010-present, b3log.org
   *
   * Solo is licensed under Mulan PSL v2.
   * You can use this software according to the terms and conditions of the Mulan PSL v2.
   * You may obtain a copy of Mulan PSL v2 at:
   *         http://license.coscl.org.cn/MulanPSL2
   * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
   * See the Mulan PSL v2 for more details.
   */
  package org.b3log.solo.cache;
  
  import org.b3log.latke.Keys;
  import org.b3log.latke.ioc.Singleton;
  import org.b3log.latke.model.Role;
  import org.b3log.solo.util.Solos;
  import org.json.JSONObject;
  
  import java.util.Map;
  import java.util.concurrent.ConcurrentHashMap;
  
  /**
   * User cache.
   *
   * @author <a href="http://88250.b3log.org">Liang Ding</a>
   * @version 1.1.0.2, Mar 3, 2019
   * @since 2.3.0
   */
  @Singleton
  public class UserCache {
  
      /**
       * Id, User.
       */
      private final Map<String, JSONObject> idCache = new ConcurrentHashMap<>();
  
      /**
       * Admin user.
       */
      private final Map<String, JSONObject> adminCache = new ConcurrentHashMap<>();
  
      /**
       * Gets the admin user.
       *
       * @return admin user
       */
      public JSONObject getAdmin() {
          return adminCache.get(Role.ADMIN_ROLE);
      }
  
      /**
       * Adds or updates the admin user.
       *
       * @param admin the specified admin user
       */
      public void putAdmin(final JSONObject admin) {
          adminCache.put(Role.ADMIN_ROLE, admin);
      }
  
      /**
       * Gets a user by the specified user id.
       *
       * @param userId the specified user id
       * @return user, returns {@code null} if not found
       */
      public JSONObject getUser(final String userId) {
          final JSONObject user = idCache.get(userId);
          if (null == user) {
              return null;
          }
  
          return Solos.clone(user);
      }
  
      /**
       * Adds or updates the specified user.
       *
       * @param user the specified user
       */
      public void putUser(final JSONObject user) {
          idCache.put(user.optString(Keys.OBJECT_ID), Solos.clone(user));
      }
  
      /**
       * Removes a user by the specified user id.
       *
       * @param id the specified user id
       */
      public void removeUser(final String id) {
          final JSONObject user = idCache.get(id);
          if (null == user) {
              return;
          }
  
          idCache.remove(id);
      }
  
      /**
       * Clears all cached data.
       */
      public void clear() {
          idCache.clear();
          adminCache.clear();
      }
  }
  