separate-socket-nodejs.md

How to separate websocket logic and app.js in Nodejs

// in app.js

let app = express();
//....
//....

const http = require('http').createServer(app);
require('./socket/index').listen(http);

//...
//...

http.listen(port, () => console.log(`Server is listening on port: ${port}`));

// in socket/index.js

const socketIO = require('socket.io');
module.exports.listen = app => {
    let io = socketIO.listen(app);
	exports.sockets = io.sockets;

    io.on('connection', function(socket) {
        //...
        //...
        socket.on("eventOne",() => {
            // ...
        })

        socket.on("eventTwo", () => {
            // ...
        })
    }

    return io
}

// wanna access from other files

const {sockets} = require('../socket/index').sockets;

sockets.sockets["testSocketID"].emit("testEvent", {
	message: "message body"
});