package com.xinquan.course.service.impl;
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import com.alibaba.nacos.common.utils.StringUtils;
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import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
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import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
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import com.xinquan.common.core.utils.page.CollUtils;
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import com.xinquan.common.core.utils.page.PageDTO;
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import com.xinquan.course.domain.Course;
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import com.xinquan.course.domain.vo.ClientCourseVO;
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import com.xinquan.course.mapper.CourseMapper;
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import com.xinquan.course.service.CourseService;
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import java.util.Objects;
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import org.springframework.stereotype.Service;
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/**
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* <p>
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* 线上课程表 服务实现类
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* </p>
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*
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* @author mitao
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* @since 2024-08-21
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*/
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@Service
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public class CourseServiceImpl extends ServiceImpl<CourseMapper, Course> implements CourseService {
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/**
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* 获取课程列表-分页
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*
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* @param courseTitle 课程标题
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* @param cateId 分类id
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* @param pageCurr 分页参数，当前页码
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* @param pageSize 分页参数，每页数量
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* @return 课程分页列表
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*/
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@Override
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public PageDTO<ClientCourseVO> getCoursePageList(String courseTitle, Long cateId,
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Integer pageCurr, Integer pageSize) {
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Page<Course> page = this.lambdaQuery()
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.like(StringUtils.isNotBlank(courseTitle), Course::getCourseTitle, courseTitle)
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.eq(Objects.nonNull(cateId), Course::getCateId, cateId)
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.orderByDesc(Course::getSortNum)
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.page(new Page<>(pageCurr, pageSize));
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if (CollUtils.isEmpty(page.getRecords())) {
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return PageDTO.empty(page);
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}
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return PageDTO.of(page, ClientCourseVO.class);
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}
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}
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