opt-cc/api/middleware/auth-middleware.js

"use strict";

const jwt = require('jsonwebtoken');
const config = require('../config/config');
const AppUser = require('../models/app-user');

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

  // check header or url parameters or post parameters for token
  const token = req.body.token || req.query.token || req.headers['x-access-token'];

  // decode token
  if (token) {

    // verifies secret and checks exp
    jwt.verify(token, config.secret, (err, decoded) => {
      if (err) {
        return res.status(403).json({success: false, message: 'Failed to authenticate token.'});
      } else {
        // if everything is good, save to request for use in other routes
        req.decoded = decoded;
        AppUser.findById(decoded.sub, (err, item) => {
          if (err) {
            return res.status(403).send({
              success: false,
              message: 'token is not associated to any actual user'
            });
          }
          req.user = item;
          next();
        });
      }
    });

  } else {

    // if there is no token
    // return an error
    return res.status(403).send({
      success: false,
      message: 'No token provided.'
    });

  }
};

module.exports = apiAuthentication;