javascript

const express = require('express');
const router = express.Router();
const fetch = require('node-fetch');
const btoa = require('btoa');
const { catchAsync } = require('../js/util');
const User = require('../models/user');
const notifier = require('../js/notifier');

const client_id = '601448212418789381';
const client_secret = 'b5VpCrVE4cQNiBz8ckVtXKIO1yEs_wUp';
const redirect = 'https%3A%2F%2Fthebox1.ml%2Fdiscordapi';

router.get('/', catchAsync(async (req, res) => {
  if (!req.query.code) throw new Error('NoCodeProvided');

  const code = req.query.code;
  const creds = btoa(`${client_id}:${client_secret}`);
  const token = await callAPI(`https://discordapp.com/api/oauth2/token?grant_type=authorization_code&code=${code}&redirect_uri=${redirect}`, `Basic ${creds}`, 'POST');
  const user = await callAPI(`https://discordapp.com/api/users/@me`, `Bearer ${token.access_token}`, 'GET');

  if (!user.username) return;

  await User.findOne({username: user.username}, function(err, user) {
    if (err) throw err;
    if (user != null) {
      res.send('You have already registered!');
      return;
    }
    continueUserCreation();
  });

  async function continueUserCreation() {
    var newUser = new User({
      username: user.username,
      verified: user.verified,
      locale: user.locale,
      mfa_enabled: user.mfa_enabled,
      id: user.id,
      avatar: user.avatar,
      discriminator: user.discriminator,
    });

    await User.create(newUser, function(err, user) {
      if (err) throw err;
    });

    notifier.emit('registeredUser', user);

    console.log(`Registered: ${user.username}#${user.discriminator}`);

    res.send(`Registered: ${user.username}#${user.discriminator}`);
  }
}));

async function callAPI(url, auth, type) {
  const response = await fetch(url,
    {
      method: type,
      headers: {
        Authorization: auth,
      },
    });
  return await response.json();
}

module.exports = router;