package com.teaching.backend.service.courses;


import com.baomidou.mybatisplus.extension.service.IService;
import com.teaching.backend.model.dto.courses.CoursesDTO;
import com.teaching.backend.model.dto.courses.PageDTO;
import com.teaching.backend.model.entity.courses.Courses;
import com.teaching.backend.model.entity.umsAdmin.UmsStudent;
import com.teaching.backend.model.query.CourseQuery;
import com.teaching.backend.model.vo.courses.CoursesVO;
import com.teaching.backend.model.vo.courses.PersonalCenterStudentListVO;
import com.teaching.backend.model.vo.umsAdmin.UmsStudentVO;

import javax.servlet.http.HttpServletResponse;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;


/**
 * <p>
 *  服务类
 * </p>
 *
 * @author zjh
 * @since 2024-05-30
 */
public interface ICoursesService extends IService<Courses> {

    String saveCourseWithObjective(CoursesDTO coursesDTO);

    PageDTO<CoursesVO> queryCourses(CourseQuery courseQuery);


    void deleteBatchByIds(String id);

    int countHours(String id);

    List<CoursesVO> getPagePageSize(int page, int pageSize);

    void updateCourse(CoursesDTO coursesDTO);

    void down(HttpServletResponse response, String id) throws Exception;

    CoursesVO getByIdCourseVo(String courseid);

    Map<String, Object> getPagePageSize2(int page, int pageSize);

    LinkedHashSet<PersonalCenterStudentListVO> queryStudentList(String userId);
}