micdrop/index.js

MicroService baseline using Express

const express = require('express');
const bodyParser = require('body-parser');

const router = require('./router');

let setDefault = (obj, key, def) => {
  if (!(obj.hasOwnProperty(key))) {
    obj[key] = process.env[key] || def;
  }
};

module.exports = (config={}) => {

  // Configuration
  setDefault(config, 'PORT', 3000);

  const app = express();
  app.use(bodyParser.json());

  if (config.hasOwnProperty('middleware')) {
    for (let middleware of config.middleware) {
      app.use(middleware);
    }
  }

  if (config.hasOwnProperty('routes')) {
    for (let route of config.routes) {
      router(app, route);
    }
  }

  // Allows external control and 'watch' testing.
  if (!module.parent.parent) {
    app.listen(config.PORT, () => {
      console.log('Listening on port %s', config.PORT);
    });
  }

  return app;
};