DiscordInteraction

DiscordInteractionWeb.js

const express = require('express')
const {verify} = require('noble-ed25519');
const bodyParser = require('body-parser');
const fetch = require('node-fetch');
const app = express()
const port = 80

app.use(bodyParser.json());

app.get('/', (req, res) => {
  res.json({hello:'world'})
})
app.post('/discord/integrations',isVailduate, async (req, res) => {
    switch(req.body.type){
      case 1:
      res.status(200).json({"type":1}); break;
      case 2:
      const token = req.body.token;
      const option = req.body.data.options;
      switch(req.body.data.name){
        case "blep":
          const optionselect = option.find(element => element.name =='animal').value;
            if(optionselect == "animal_dog"){
              res.status(200).json({
                  "type": 4, //명령어도 보이고 메세지도 보이고!
                  "data": {
                    "content": `강아지를 좋아하시는 군요!`,
                  }
              })
            }else if(optionselect == "animal_cat"){
              res.status(200).json({
                "type": 3, //명령어는 안보이지만 메세지는 보이게
                "data": {
                  "content": `고양이를 좋아하시는 군요!`,
               }});
            }else{
              res.status(200).json({
                "type": 5 //메세지는 안보내지만 명령어는 보이게
              });
            }
        break;
      }
    case "neko":
      const optionselect = option.find(element => element.name =='isnsfw').value;
      const nekourl = optionselect ? "/api/v2/img/lewd" : "api/v2/img/neko";
      fetch(`https://nekos.life/${nekourl}`).then(res=>res.json()).then(re=>{
      res.status(200).json({
        "type": 3,
        "data": {
          "content": re.url,
       }});});
       break;
      }
})

app.listen(port, () => {
  console.log(`작동 시작합니다.`)
})

async function isVailduate(req,res,next){
  const publickey = 'PUBLIC_KEY';
  const signiture = req.headers['x-signature-ed25519'];
  const timestamp = req.headers['x-signature-timestamp'];
  const body = JSON.stringify(req.body);
  const isSigned =  await verify(signiture,Buffer.concat([Buffer.from(timestamp),Buffer.from(body)]),publickey);
  return isSigned ? next() : res.status(403).json({code:403,message:"403 Forbidden"});
}
async function send(token,msg){
  const id = '683172735081250837';
       return fetch(`https://discord.com/api/webhooks/${id}/${token}/`,{
          method: 'POST',
          headers: {
            'Content-type': 'application/json'
          },
          body: JSON.stringify({content:msg})
        },10000);
      }