CommentService.java

package com.tanpu.community.service;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.tanpu.common.uuid.UuidGenHelper;
import com.tanpu.community.api.enums.DeleteTagEnum;
import com.tanpu.community.api.enums.TopicStatusEnum;
import com.tanpu.community.dao.entity.community.CommentEntity;
import com.tanpu.community.dao.mapper.community.CommentMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

@Service
public class CommentService {

    @Resource
    private CommentMapper commentMapper;

    @Autowired
    private UuidGenHelper uuidGenHelper;

    public void insertComment(CommentEntity commentEntity) {
        commentEntity.setCommentId(uuidGenHelper.getUuidStr());
        commentMapper.insert(commentEntity);
    }


    public List<CommentEntity> selectByUserId(String userId) {
        return commentMapper.selectList(new LambdaQueryWrapper<CommentEntity>().eq(CommentEntity::getAuthorId, userId));
    }

    //统计主题集合的评论量
    public Integer getCommentCountByThemeIds(List<String> themeIds) {
        return  commentMapper.selectList((new LambdaQueryWrapper<CommentEntity>()
                .in(CommentEntity::getThemeId, themeIds)))
                .size();
    }

    public Set<String> getCommentUserCount(List<String> themeIds) {
        return commentMapper.selectList((new LambdaQueryWrapper<CommentEntity>()
                .in(CommentEntity::getThemeId, themeIds)))
                .stream().map(CommentEntity::getAuthorId).collect(Collectors.toSet());
    }

    public List<CommentEntity> selectByThemeIdAndParentId(String themeId, String parentId) {
        LambdaQueryWrapper<CommentEntity> queryWrapper = new LambdaQueryWrapper<CommentEntity>()
                .eq(CommentEntity::getThemeId, themeId)
                .eq(CommentEntity::getDeleteTag, DeleteTagEnum.NOT_DELETED.getCode())
                .eq(CommentEntity::getIsBlock, TopicStatusEnum.FALSE.getCode())
                .orderByDesc(CommentEntity::getCreateTime);
        if (parentId == null) {
            queryWrapper.isNull(CommentEntity::getParentId);
        } else {
            queryWrapper.eq(CommentEntity::getParentId, parentId);
        }
        return commentMapper.selectList(queryWrapper);
    }


}