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+package com.zhongzheng.modules.collect.service.impl;
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+
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+import cn.hutool.core.bean.BeanUtil;
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+import cn.hutool.core.lang.Validator;
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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.collect.bo.CollectCourseAddBo;
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+import com.zhongzheng.modules.collect.bo.CollectCourseEditBo;
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+import com.zhongzheng.modules.collect.bo.CollectCourseQueryBo;
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+import com.zhongzheng.modules.collect.domain.CollectCourse;
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+import com.zhongzheng.modules.collect.mapper.CollectCourseMapper;
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+import com.zhongzheng.modules.collect.service.ICollectCourseService;
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+import com.zhongzheng.modules.collect.vo.CollectCourseVo;
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+import com.zhongzheng.modules.course.domain.MajorCategory;
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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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+ * 收藏课程Service业务层处理
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+ *
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+ * @author ruoyi
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+ * @date 2021-06-22
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+ */
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+@Service
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+public class CollectCourseServiceImpl extends ServiceImpl<CollectCourseMapper, CollectCourse> implements ICollectCourseService {
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+
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+ @Override
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+ public CollectCourseVo queryById(Long collectCourseId){
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+ CollectCourse db = this.baseMapper.selectById(collectCourseId);
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+ return BeanUtil.toBean(db, CollectCourseVo.class);
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+ }
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+
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+ @Override
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+ public CollectCourse queryByCourseId(Long userID, Long courseId) {
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+ CollectCourse info = getOne(new LambdaQueryWrapper<CollectCourse>()
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+ .eq(CollectCourse::getCourseId,courseId)
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+ .eq(CollectCourse::getUserId,userID)
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+ .last("limit 1"));
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+ return info;
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+ }
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+
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+ @Override
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+ public List<CollectCourseVo> queryList(CollectCourseQueryBo bo) {
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+ LambdaQueryWrapper<CollectCourse> lqw = Wrappers.lambdaQuery();
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+ lqw.eq(bo.getCourseId() != null, CollectCourse::getCourseId, bo.getCourseId());
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+ lqw.eq(bo.getUserId() != null, CollectCourse::getUserId, bo.getUserId());
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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<CollectCourseVo> entity2Vo(Collection<CollectCourse> collection) {
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+ List<CollectCourseVo> voList = collection.stream()
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+ .map(any -> BeanUtil.toBean(any, CollectCourseVo.class))
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+ .collect(Collectors.toList());
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+ if (collection instanceof Page) {
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+ Page<CollectCourse> page = (Page<CollectCourse>)collection;
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+ Page<CollectCourseVo> 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(CollectCourseAddBo bo) {
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+ CollectCourse add = BeanUtil.toBean(bo, CollectCourse.class);
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+ validEntityBeforeSave(add);
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+ add.setCreateTime(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(CollectCourseEditBo bo) {
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+ CollectCourse update = BeanUtil.toBean(bo, CollectCourse.class);
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+ validEntityBeforeSave(update);
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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(CollectCourse entity){
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+ //TODO 做一些数据校验,如唯一约束
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+ CollectCourse info = getOne(new LambdaQueryWrapper<CollectCourse>()
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+ .eq(CollectCourse::getCourseId,entity.getCourseId())
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+ .eq(CollectCourse::getUserId,entity.getUserId())
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+ .last("limit 1"));
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+ if (Validator.isNotNull(info)) {
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+ throw new CustomException("你已收藏了");
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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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