api.js

var express = require('express'),
    Bourne = require('bourne'),
    bodyParser = require('body-parser'),

    db = new Bourne('data.json'),
    router = express.Router();

router
    .use(bodyParser.json())
    .route('/contact')
        .get(function (req, res) {
            // TODO: fix workaround of not existing user.id
            if (req.user) {
                db.find({userId: parseInt(req.user.id, 10)}, function (err, data) {
                    res.json(data);
                });
            } else if (req.session.userId) {
                    db.find({ userId: req.session.userId }, function (err, data) {
                        res.json(data);
                    });
            } else {
                db.find({userId: parseInt(1, 10)}, function (err, data) {
                    res.json(data);
                });
            }
            // TODO_END
        })
        .post(function (req, res) {
            var contact = req.body;
            contact.userId = req.user.id;

            db.insert(contact, function (err, data) {
                res.json(data);
            })
        });

router
    .param('id', function (req, res, next) {
        req.dbQuery = {id: parseInt(req.params.id, 10)};
        next();
    })
    .route('/contact/:id')
        .get(function (req, res) {
            db.findOne(req.dbQuery, function (err, data) {
                res.json(data);
            });
        })
        .put(function (req, res) {
            var contact = req.body;
            delete contact.$promise;
            delete contact.$resolved;
            db.update(req.dbQuery, contact, function (err, data) {
                res.json(data[0]);
            });
        })
        .delete(function (req, res) {
           db.delete(req.dbQuery, function () {
               res.json(null);
           });
        });

module.exports = router;