Socket.io emit from Express controllers

Question

I\'m quite new to Node.js / Express, and I\'m using it as a backend for an AngularJS app. I\'ve looked all over StackOverflow for some help on my problem, but I can\'t seem

Answer 1

You can use a pattern based on standard JS closures. The main export in logs.js will not be the controller function itself, but a factory function that will accept all needed dependencies, and create the controller:

exports.create = function(socket) {
  return function(req, res) {
    // write body of api request to mongodb
    socket.emit();
  }
}

Then, when you want to use it:

app.route('/logs').post(logs.create(socket));

Since you set up your routes in a separate package, you have to use the same pattern in routes.js - routes should receive the socket to use as a parameter.

This pattern works well if you want to handle those things with DI later, or test your controllers with mock "sockets".