=============
后端_添加评论
=============

1 视图对象

1.1 评论参数视图对象

/ysdblog-api/src/main/java/com/weihome/ysdblog/vo/param/CommentParam.java：

@Data
public class CommentParam {
    private String content;
    private Long articleId;
    private Long parentId;
    private Long toUid;
}

2 评论服务

2.1 评论服务接口

/ysdblog-api/src/main/java/com/weihome/ysdblog/service/CommentService.java：

public interface CommentService {
    ...
    /**
     * 添加评论
     */
    Result add(CommentParam commentParam);
    ...
}

2.2 评论服务实现

/ysdblog-api/src/main/java/com/weihome/ysdblog/service/impl/CommentServiceImpl.java：

...
public class CommentServiceImpl implements CommentService {
    ...
    @Override
    public Result add(CommentParam commentParam) {
        Comment comment = new Comment();
        comment.setContent(commentParam.getContent());
        comment.setCreateDate(System.currentTimeMillis());
        comment.setArticleId(commentParam.getArticleId());
        comment.setAuthorId(UserThreadLocal.get().getId());
        Long parentId = commentParam.getParentId();
        comment.setParentId(parentId == null ? 0 : parentId);
        Long toUid = commentParam.getToUid();
        comment.setToUid(toUid == null ? 0 : toUid);
        comment.setLevel(comment.getParentId() == 0 ? 1 : 2);
        commentMapper.insert(comment);
        return Result.success(null);
    }
    ...
}

3 评论控制器

/ysdblog-api/src/main/java/com/weihome/ysdblog/controller/CommentController.java：

...
public class CommentController {
    ...
    /**
     * 添加评论
     */
    @PostMapping("add")
    public Result add(@RequestBody CommentParam commentParam) {
        return commentService.add(commentParam);
    }
    ...
}

4 添加登录拦截

/ysdblog-api/src/main/java/com/weihome/ysdblog/config/WebMvcConfig.java：

...
public class WebMvcConfig implements WebMvcConfigurer {
    ...
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(loginInterceptor)
            ...
            .addPathPatterns("/comment/add")
            ...
    }
    ...
}

5 运行测试

Postman
    POST
        localhost:8888/comment/add
    Headers
        Authorization: eyJhbGciOiJIUzI1NiJ9.eyJleHAiOjE2NDk2ODEyNzYsInVzZXJJZCI6MSwiaWF0IjoxNjQ4NzkyMjQzfQ.Ba9co3QLNvRJ3k2aYAN9zVvDliLl0KBTtTBfz1UkOgU
    Body
{
    "content": "comment_a",
    "articleId": "1511577146642972674",
    "parentId": "0",
    "toUid": "0"
}
---------------------------
{
    "success": true,
    "code": 200,
    "msg": "success",
    "data": null
}

检查数据库t_comment表中的新增记录。