backend/src/main/java/nju/seec/helper/controller/CommentController.java

package nju.seec.helper.controller;

import nju.seec.helper.aspect.auth.Auth;
import nju.seec.helper.controller.response.PageResponse;
import nju.seec.helper.dto.CommentDTO;
import nju.seec.helper.dto.LoginUser;
import nju.seec.helper.service.CommentService;
import nju.seec.helper.util.JsonUtils;
import nju.seec.helper.util.enums.UserType;
import nju.seec.helper.vo.CommentVO;
import org.springframework.data.domain.Pageable;
import org.springframework.data.web.PageableDefault;
import org.springframework.web.bind.annotation.*;

import javax.validation.Valid;

/**
 * 评论
 *
 * @author cst
 */
@RestController
@RequestMapping("/api/comment")
public class CommentController {
    private final CommentService commentService;

    public CommentController(CommentService commentService) {
        this.commentService = commentService;
    }

    /**
     * 发表评论
     */
    @Auth(roles = {UserType.TEACHER, UserType.STUDENT}, message = "发表评论")
    @PostMapping
    public CommentVO createComment(LoginUser user,
                                   @Valid @RequestBody CommentDTO commentDTO) {
        CommentVO commentVO = commentService.createComment(user, commentDTO);
        CommentWebsocket.sendAllMessage(commentDTO.getSlideId(), JsonUtils.toJson(commentVO));
        return commentVO;
    }

    /**
     * 删除评论
     */
    @Auth(roles = {UserType.TEACHER, UserType.STUDENT}, message = "删除评论")
    @DeleteMapping("/{commentId}")
    public void removeComment(LoginUser user,
                              @PathVariable Integer commentId) {
        commentService.removeComment(user, commentId);
    }

    /**
     * 教师置顶评论
     */
    @Auth(roles = UserType.TEACHER, message = "置顶评论")
    @PostMapping("/{commentId}/top")
    public void topComment(LoginUser user,
                           @PathVariable Integer commentId) {
        commentService.topComment(user, commentId);
    }

    /**
     * 教师取消置顶评论
     */
    @Auth(roles = UserType.TEACHER, message = "取消置顶评论")
    @PostMapping("/{commentId}/unTop")
    public void unTopComment(LoginUser user,
                             @PathVariable Integer commentId) {
        commentService.unTopComment(user, commentId);
    }

    /**
     * 取得某一页的评论信息
     */
    @GetMapping("/slide/{slideId}")
    public PageResponse<CommentVO> getComments(@PathVariable Integer slideId,
                                               @RequestParam(required = false, defaultValue = "1") Integer pageNumber,
                                               @PageableDefault(Integer.MAX_VALUE) Pageable pageable) {
        return PageResponse.of(commentService.getCommentsBySlideIdAndPageNumber(slideId, pageNumber, pageable));
    }
}