To do list

• guests can leave comments without login 不用登陆也能评论（重构整个评论结构）

  Done

• reply logic 回复评论 （引用模式/盖楼模式？）

  Done

• better setting of rule 修改访问规则，增加安全性

  Done

  • name require
  • email valid require
  • url optional
  • post require
  • timestamp require
  • comment require
  • reply optional
• enable to close comment to special post 设置允许评论

  jekyll里面设置

• gravatar 使用 https://secure.gravatar.com/

  Done

• verify by number/sth like that 验证码或者图形防止垃圾信息
• 500 limit 分页逻辑
• delete 删除评论前台逻辑
• comments count

  返回特定文章的评论数量 Done

• Error handle 错误代码处理

  Done

• callback改写成promise

refer

https://flinhong.com/2017/03/25/self-host-comments-in-jekyll-using-firebase-database/