synt_backend/helpers/user.js

Synt light-weight node backend service

const db = require("./../mysql/models/index");
const config = require("./../config/jwt-config.json");
const jwt = require("jsonwebtoken");

module.exports = {
  getDecodedToken,
  getAuthUser,
  addJwtToken,
};

function getDecodedToken(req) {
  if (!req.headers["x-access-token"] && !req.headers["authorization"]) {
    return null;
  }
  let token = req.headers["x-access-token"] || req.headers["authorization"]; // Express headers are auto converted to lowercase
  if (token.startsWith("Bearer ")) {
    // Remove Bearer from string
    token = token.slice(7, token.length);
    let decoded = jwt.verify(token, config.secret);
    return decoded;
  }
  return null;
}

async function getAuthUser(req) {
  const decoded = getDecodedToken(req);
  if (decoded && decoded.UserId) {
    let User = await db.User.findOne({ where: { id: decoded.UserId } });
    if (User) {
      User.VMEId = decoded.VMEId || null;
      User.DeviceId = decoded.DeviceId || null;
      return User;
    }
  }

  console.log("JWT problem");
  return null;
}

function addJwtToken(User, VMEId, DeviceId) {
  const token = jwt.sign(
    { UserId: User.id, VMEId, DeviceId },
    process.env.JWT_SECRET
  );
  // FIXME: check type or something instead of try/catch
  try {
    User = User.toJSON();
  } catch {
    console.log("User already json?");
  }
  User.token = token;
  User.token_type = "Bearer";
  return User;
}