package nju.seec.helper.service;

import nju.seec.helper.dto.course.CourseFileDTO;
import nju.seec.helper.dto.user.LoginUser;
import nju.seec.helper.vo.CourseFileVO;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;

/**
 * @author cst
 */
public interface CourseFileService {
    /**
     * 上传课程附件
     *
     * @param user
     * @param courseFileDTO
     */
    void uploadCourseFile(LoginUser user, CourseFileDTO courseFileDTO);

    /**
     * 删除课程附件
     *
     * @param user
     * @param courseFileId
     */
    void  deleteCourseFile(LoginUser user, Long courseFileId);

    /**
     * 取得课程附件
     *
     * @param user
     * @param courseId
     * @param key
     * @param pageable
     * @return
     */
    Page<CourseFileVO> getCourseFilesByCourse(LoginUser user, Long courseId, String key, Pageable pageable);

    /**
     * 取得课程附件链接
     *
     * @param user
     * @param courseFileId
     * @return
     */
    String getCourseFileUrl(LoginUser user, Long courseFileId);
}