Codecademy export

app.js

const express = require('express');
const path = require('path');
const OAuth2Server = require('oauth2-server');

const app = express();


app.use(express.json());
app.use(express.urlencoded({extended: true}));

const PORT = 4001

const oauth = new OAuth2Server({
  model: require("./model"),
  allowBearerTokensInQueryString: true
})

const authenticateRequest = (req, res, next) => {

  let request = new OAuth2Server.Request(req);
  let response = new OAuth2Server.Response(res)

  return oauth.authenticate(request, response)
    .then((token)=>{
      next()
    })
    .catch((err) => {
      res.sendFile(path.join(__dirname, 'public/error.html'))
    })
}

const obtainToken = (req, res) => {
  let request = new OAuth2Server.Request(req);
  let response = new OAuth2Server.Response(res);

  return oauth.token(request, response)
    .then((token) => {
      res.json(token);
    })
    .catch((err) => {
      res.json(err);
    })
}

app.all('/auth', obtainToken);

app.get('/', (req, res)=>{
    res.sendFile(path.join(__dirname, 'public/home.html'));
})
app.get('/login', (req, res)=>{
    res.sendFile(path.join(__dirname, 'public/login.html'));
})

app.get('/public', (req, res)=>{
    res.sendFile(path.join(__dirname, 'public/allowed.html'));
})

app.get('/secret', authenticateRequest, (req, res)=>{
    res.sendFile(path.join(__dirname, 'public/private.html'));
})

app.listen(PORT, ()=>console.log(`Listening on port ${PORT}`));

db.js

module.exports =
{
  confidentialClients: [{
    clientId: 'codecademy',
    clientSecret: 'codec@demy',
    grants: [
      'client_credentials'
    ],
  }],
  tokens:[]
}

model.js

const db = require('./db')

const getClient = (clientId, clientSecret) => {
  let confidentialClients = db.confidentialClients.filter((client)=>{
    return client.clientId === clientId && client.clientSecret === clientSecret
  })
  return confidentialClients[0]
}

const saveToken = (token, client, user) => {
  token.client = {
    id: client.clientId
  }
  token.user = {
    username: user.username
  }

  db.tokens.push(token)
  return token
}

const getUserFromClient = (client) => {
  // return client
  return {}
}


const getAccessToken = (accessToken) => {
  let tokens = db.tokens.filter((savedToken)=>{
    return savedToken.accessToken === accessToken
  })
  return tokens[0]
}

module.exports = {
  getAccessToken: getAccessToken,
  getClient: getClient,
  getUserFromClient: getUserFromClient,
  saveToken: saveToken
}