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@@ -0,0 +1,112 @@
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+package com.zhongzheng.modules.course.service.impl;
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+
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+import cn.hutool.core.bean.BeanUtil;
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+import cn.hutool.core.util.StrUtil;
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+import com.zhongzheng.common.exception.CustomException;
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+import com.zhongzheng.common.utils.DateUtils;
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+import com.zhongzheng.modules.course.bo.CourseAddBo;
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+import com.zhongzheng.modules.course.bo.CourseEditBo;
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+import com.zhongzheng.modules.course.bo.CourseQueryBo;
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+import com.zhongzheng.modules.course.domain.Course;
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+import com.zhongzheng.modules.course.mapper.CourseMapper;
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+import com.zhongzheng.modules.course.service.ICourseService;
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+import com.zhongzheng.modules.course.vo.CourseVo;
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+import org.springframework.stereotype.Service;
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+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
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+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
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+import com.baomidou.mybatisplus.core.toolkit.Wrappers;
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+import com.github.pagehelper.Page;
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+
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+import java.util.Collection;
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+import java.util.Collections;
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+import java.util.List;
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+import java.util.stream.Collectors;
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+
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+/**
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+ * 课程Service业务层处理
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+ *
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+ * @author ruoyi
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+ * @date 2021-05-19
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+ */
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+@Service
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+public class CourseServiceImpl extends ServiceImpl<CourseMapper, Course> implements ICourseService {
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+
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+ @Override
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+ public CourseVo queryById(Long courseId){
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+ Course db = this.baseMapper.selectById(courseId);
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+ return BeanUtil.toBean(db, CourseVo.class);
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+ }
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+
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+ @Override
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+ public List<CourseVo> queryList(CourseQueryBo bo) {
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+ LambdaQueryWrapper<Course> lqw = Wrappers.lambdaQuery();
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+ lqw.eq(bo.getCategoryId() != null, Course::getCategoryId, bo.getCategoryId());
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+ lqw.eq(bo.getPrice() != null, Course::getPrice, bo.getPrice());
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+ lqw.eq(bo.getDuration() != null, Course::getDuration, bo.getDuration());
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+ lqw.eq(bo.getStartTime() != null, Course::getStartTime, bo.getStartTime());
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+ lqw.eq(bo.getEndTime() != null, Course::getEndTime, bo.getEndTime());
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+ lqw.eq(StrUtil.isNotBlank(bo.getCoverUrl()), Course::getCoverUrl, bo.getCoverUrl());
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+ lqw.eq(StrUtil.isNotBlank(bo.getIntroduction()), Course::getIntroduction, bo.getIntroduction());
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+ lqw.eq(bo.getStatus() != null, Course::getStatus, bo.getStatus());
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+ lqw.eq(StrUtil.isNotBlank(bo.getTeacherIds()), Course::getTeacherIds, bo.getTeacherIds());
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+ lqw.like(StrUtil.isNotBlank(bo.getCourseName()), Course::getCourseName, bo.getCourseName());
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+ return entity2Vo(this.list(lqw));
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+ }
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+
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+ /**
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+ * 实体类转化成视图对象
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+ *
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+ * @param collection 实体类集合
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+ * @return
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+ */
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+ private List<CourseVo> entity2Vo(Collection<Course> collection) {
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+ List<CourseVo> voList = collection.stream()
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+ .map(any -> BeanUtil.toBean(any, CourseVo.class))
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+ .collect(Collectors.toList());
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+ if (collection instanceof Page) {
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+ Page<Course> page = (Page<Course>)collection;
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+ Page<CourseVo> pageVo = new Page<>();
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+ BeanUtil.copyProperties(page,pageVo);
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+ pageVo.addAll(voList);
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+ voList = pageVo;
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+ }
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+ return voList;
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+ }
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+
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+ @Override
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+ public Boolean insertByAddBo(CourseAddBo bo) {
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+ Course add = BeanUtil.toBean(bo, Course.class);
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+ validEntityBeforeSave(add);
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+ add.setCreateTime(DateUtils.getNowTime());
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+ add.setUpdateTime(DateUtils.getNowTime());
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+ return this.save(add);
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+ }
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+
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+ @Override
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+ public Boolean updateByEditBo(CourseEditBo bo) {
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+ Course update = BeanUtil.toBean(bo, Course.class);
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+ validEntityBeforeSave(update);
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+ update.setUpdateTime(DateUtils.getNowTime());
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+ return this.updateById(update);
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+ }
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+
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+ /**
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+ * 保存前的数据校验
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+ *
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+ * @param entity 实体类数据
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+ */
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+ private void validEntityBeforeSave(Course entity){
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+ //TODO 做一些数据校验,如唯一约束
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+ if(entity.getEndTime()<entity.getStartTime()){
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+ throw new CustomException("结束时间须大于开始时间");
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+ }
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+ }
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+
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+ @Override
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+ public Boolean deleteWithValidByIds(Collection<Long> ids, Boolean isValid) {
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+ if(isValid){
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+ //TODO 做一些业务上的校验,判断是否需要校验
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+ }
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+ return this.removeByIds(ids);
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+ }
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+}
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