content: /*
   * Symphony - A modern community (forum/BBS/SNS/blog) platform written in Java.
   * Copyright (C) 2012-present, b3log.org
   *
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Affero General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU Affero General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with this program.  If not, see <https://www.gnu.org/licenses/>.
   */
  package org.b3log.symphony.service;
  
  import org.apache.commons.lang3.StringUtils;
  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.RepositoryException;
  import org.b3log.latke.service.annotation.Service;
  import org.b3log.symphony.repository.EmotionRepository;
  
  /**
   * Emotion query service.
   *
   * @author <a href="https://ld246.com/member/ZephyrJung">Zephyr</a>
   * @author <a href="http://88250.b3log.org">Liang Ding</a>
   * @version 1.0.0.2, Apr 25, 2017
   * @since 1.5.0
   */
  @Service
  public class EmotionQueryService {
  
      /**
       * Logger.
       */
      private static final Logger LOGGER = LogManager.getLogger(EmotionQueryService.class);
  
      /**
       * Common used emoji string.
       */
      private static final String COMMON_USED = "smile,flushed,joy,sob,yum,trollface,tada,heart,+1,ok_hand,pray";
  
      /**
       * Emotion repository.
       */
      @Inject
      private EmotionRepository emotionRepository;
  
      /**
       * Gets a user's emotion (emoji with type=0).
       *
       * @param userId the specified user id
       * @return emoji string join with {@code ","}, returns a common used emoji string if not found
       */
      public String getEmojis(final String userId) {
          try {
              final String ret = emotionRepository.getUserEmojis(userId);
              if (StringUtils.isBlank(ret)) {
                  return COMMON_USED;
              }
  
              return ret;
          } catch (final RepositoryException e) {
              LOGGER.log(Level.ERROR, e.getMessage());
  
              return COMMON_USED;
          }
      }
  }
  