KM-Server-Milestone2/src/main/java/com/redxun/knowledge/service/NewsServiceImpl.java

package com.redxun.knowledge.service;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.redxun.common.base.db.BaseDao;
import com.redxun.common.base.db.BaseService;
import com.redxun.common.base.db.PageHelper;
import com.redxun.common.base.entity.QueryData;
import com.redxun.common.base.search.QueryFilter;
import com.redxun.common.base.search.QueryFilterBuilder;
import com.redxun.common.service.impl.SuperServiceImpl;
import com.redxun.common.tool.BeanUtil;
import com.redxun.common.tool.IdGenerator;
import com.redxun.feign.org.UserClient;
import com.redxun.knowledge.common.UserService;
import com.redxun.knowledge.entity.dao.Banner;
import com.redxun.knowledge.entity.dao.News;
import com.redxun.knowledge.entity.vo.NewsAdminVo;
import com.redxun.knowledge.entity.vo.NewsPcVo;
import com.redxun.knowledge.mapper.NewsMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * [业务--新闻表]业务服务类
 */
@Slf4j
@Service
public class NewsServiceImpl extends SuperServiceImpl<NewsMapper, News> implements BaseService<News> {

    @Resource
    private NewsMapper newsMapper;

    @Autowired
    private UserService userService;

    @Override
    public BaseDao<News> getRepository() {
        return newsMapper;
    }

    /**
     * 后台新闻列表(分页)
     *
     * @param filter
     * @return
     */
    public IPage findAllNews(QueryFilter filter) {
        Map<String, Object> params = PageHelper.constructParams(filter);
        IPage page = newsMapper.findAllNews(filter.getPage(), filter.getParams(),params);
        List<News> newsList = page.getRecords();
        List<NewsAdminVo> collectNewsAdminVoList = newsList.parallelStream().map(e -> {
            NewsAdminVo newsAdminVo = new NewsAdminVo();
            BeanUtils.copyProperties(e, newsAdminVo);
            return newsAdminVo;
        }).collect(Collectors.toList());
        page.setRecords(collectNewsAdminVoList);
        return page;
    }

    /**
     * 新增新闻
     * @param entity
     * @return
     */
    @Override
    public int insert(News entity) {
        if (BeanUtil.isEmpty(entity.getPkId())) {
            entity.setPkId(IdGenerator.getIdStr());
            entity.setAuthorId(entity.getAuthorId());
            entity.setAuthor(entity.getAuthor());
        }
        if (entity.getSort() == null){
            entity.setSort(0);
        }
        QueryWrapper<News> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("SORT",entity.getSort());
        Integer integer = newsMapper.selectCount(queryWrapper);
        if (integer > 0){
            newsMapper.insertOrUpdateBySort(entity.getSort());
        }
        return this.getRepository().insert(entity);
    }

    /**
     * 修改新闻
     * @param entity
     * @return
     */
    @Override
    public int update(News entity) {
        if (entity.getSort() != null){
            QueryWrapper<News> queryWrapper = new QueryWrapper<>();
            queryWrapper.eq("SORT",entity.getSort());
            Integer integer = newsMapper.selectCount(queryWrapper);
            if (integer > 0){
                newsMapper.insertOrUpdateBySort(entity.getSort());
            }
        }
        return this.getRepository().updateById(entity);
    }

    @Override
    public void delete(Serializable id) {
        // 修改sort
        News news = this.baseMapper.selectById(id);
        newsMapper.deleteBySort(news.getSort());
        newsMapper.deleteNews(id);
    }

    /**
     * 状态为true,上升;为false,下降
     * @param newsId
     * @param status
     */
    @Transactional(rollbackFor = Exception.class)
    public void goUpOrDownUp(String newsId,Boolean status) {
        News news = this.get(newsId);
        Integer sort = news.getSort();
        if (status){
            // 上升
            QueryWrapper<News> queryWrapper = new QueryWrapper<>();
            queryWrapper.orderByAsc("SORT").orderByDesc("ENABLED");
            List<News> newsList = newsMapper.selectList(queryWrapper);
            List<News> collect = newsList.stream().filter(e -> e.getSort() < sort).collect(Collectors.toList());
            News newsPre = collect.get(collect.size() - 1);
            // 交换位置
            int temp = sort;
            newsMapper.swapSort(newsId,newsPre.getSort());
            newsMapper.swapSort(newsPre.getPkId(),temp);
        } else {
            // 下降
            QueryWrapper<News> queryWrapper = new QueryWrapper<>();
            queryWrapper.orderByAsc("SORT").orderByDesc("ENABLED");
            List<News> newsList = newsMapper.selectList(queryWrapper);
            List<News> collect = newsList.stream().filter(e -> e.getSort() > sort).collect(Collectors.toList());
            News newsNext = collect.get(0);
            // 交换位置
            int temp = sort;
            newsMapper.swapSort(newsId,newsNext.getSort());
            newsMapper.swapSort(newsNext.getPkId(),temp);
        }
    }


    /**
     * 首页新闻资讯 前台展示
     *
     * @return
     */
    public List<NewsPcVo> getAllList() {
        // 组装分页
        QueryData queryData = new QueryData();
        queryData.setPageNo(1);
        queryData.setPageSize(10);
        QueryFilter filter = QueryFilterBuilder.createQueryFilter(queryData);
        IPage page = this.findAllNews(filter);
        // 查询后台展示结果
        List<NewsAdminVo> records = page.getRecords();
        // 前台展示结果处理
        List<NewsPcVo> collectNewsPcVoList = records.stream().
                filter(e -> e.getEnabled() == 1).
                limit(6).
                map(e -> {
                    NewsPcVo newsPcVo = new NewsPcVo();
                    BeanUtils.copyProperties(e, newsPcVo);
                    return newsPcVo;
                }).collect(Collectors.toList());
        return collectNewsPcVoList;
    }

    /**
     * 前台分页列表
     *
     * @param filter
     * @return
     */
    public IPage findAllPcNews(QueryFilter filter) {
        IPage page = newsMapper.findAllPcNews(filter.getPage(), filter.getParams());
        return page;
    }

}