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.service;
  
  import org.apache.logging.log4j.Level;
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  import org.b3log.latke.ioc.Inject;
  import org.b3log.latke.repository.FilterOperator;
  import org.b3log.latke.repository.PropertyFilter;
  import org.b3log.latke.repository.Query;
  import org.b3log.latke.service.annotation.Service;
  import org.b3log.solo.model.Article;
  import org.b3log.solo.model.Option;
  import org.b3log.solo.repository.ArticleRepository;
  import org.json.JSONObject;
  
  /**
   * Statistic query service.
   *
   * @author <a href="http://88250.b3log.org">Liang Ding</a>
   * @version 2.0.0.3, Jul 8, 2020
   * @since 0.5.0
   */
  @Service
  public class StatisticQueryService {
  
      /**
       * Logger.
       */
      private static final Logger LOGGER = LogManager.getLogger(StatisticQueryService.class);
  
      /**
       * Option query service.
       */
      @Inject
      private OptionQueryService optionQueryService;
  
      /**
       * Article repository.
       */
      @Inject
      private ArticleRepository articleRepository;
  
      /**
       * Gets the online visitor count.
       *
       * @return online visitor count
       */
      public static int getOnlineVisitorCount() {
          return StatisticMgmtService.ONLINE_VISITORS.size();
      }
  
      /**
       * Gets the statistic.
       *
       * @return statistic, returns {@code null} if not found
       */
      public JSONObject getStatistic() {
          try {
              final JSONObject ret = optionQueryService.getOptions(Option.CATEGORY_C_STATISTIC);
              final long publishedArticleCount = articleRepository.count(new Query().setFilter(new PropertyFilter(Article.ARTICLE_STATUS, FilterOperator.EQUAL, Article.ARTICLE_STATUS_C_PUBLISHED)));
              ret.put(Option.ID_T_STATISTIC_PUBLISHED_ARTICLE_COUNT, publishedArticleCount);
  
              return ret;
          } catch (final Exception e) {
              LOGGER.log(Level.ERROR, "Gets statistic failed", e);
  
              return null;
          }
      }
  }
  