backend/src/main/java/nju/seec/helper/service/CommentService.java

package nju.seec.helper.service;

import nju.seec.helper.dto.CommentDTO;
import nju.seec.helper.dto.LoginUser;
import nju.seec.helper.vo.CommentVO;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;

/**
 * @author cst
 */
public interface CommentService {
    /**
     * 创建评论
     *
     * @param user
     * @param commentDTO
     * @return
     */
    CommentVO createComment(LoginUser user, CommentDTO commentDTO);

    /**
     * 删除评论
     *
     * @param user
     * @param commentId
     */
    void removeComment(LoginUser user, Long commentId);

    /**
     * 置顶评论
     *
     * @param user
     * @param commentId
     */
    void topComment(LoginUser user, Long commentId);

    /**
     * 取消置顶
     *
     * @param user
     * @param commentId
     */
    void unTopComment(LoginUser user, Long commentId);

    /**
     * 基于课件和页码数获取评论
     *
     * @param slideId
     * @param pageNumber
     * @param pageable
     * @return
     */
    Page<CommentVO> getCommentsBySlideAndPageNumber(Long slideId, Integer pageNumber, Pageable pageable);

    /**
     * 获得某条评论
     *
     * @param commentId
     * @return
     */
    CommentVO getOneComment(Long commentId);
}