breake timer on socket event - node.js

Question

I need to break a timer on a socket event and my Nodejs Express Socket.io App looks like this:
app.js
const express = require('express') ;
const app = express();
const server = require('http').Server(app);
const io = require('socket.io')(server);
const api = require('./routes/api');
const users = io.of('/users') ;
const usersNamespace= (socket) => {
socket.on('disconnect',()=>{
});
}
users.on('connection',usersNamespace) ;
app.use('/api', api);
// make socket.io accessible in the express router
app.use((req,res,next)=>{
req.io = io;
req.users = users;
next();
});
server.listen('8000');
my ./routes/api.js file looks like:
var express = require('express');
var router = express.Router();
router.post('/test',req,res) {
// broadcast body of request to users namespace
req.users.emit('restreq',req.body) ;
var timer = setInterval(()=>{
console.log('hello');
}, 5000);
res.status(200).json('received') ;
}
module.exports = router;
The question is how i can do clearInterval and stop the timer on a receiving socket event?

Answer 1

You can pass a function or object to deal with intervals as you do with users:
app.js
const express = require('express') ;
const app = express();
const server = require('http').Server(app);
const io = require('socket.io')(server);
const api = require('./routes/api');
const users = io.of('/drivers') ;
const timer = {
hInterval: null,
register: hInterval => {
timer.hInterval = hInterval
},
disable: () => {
clearInterval(timer.hInterval)
timer.hInterval = null
}
}
const usersNamespace = socket => {
socket.on('disconnect', () => {
timer.disable()
});
}
users.on('connection', usersNamespace) ;
app.use('/api', api);
// make socket.io accessible in the express router
app.use((req, res, next)=>{
req.io = io;
req.users = users;
req.timer = timer;
next();
});
server.listen('8000');
api.js:
var express = require('express');
var router = express.Router();
router.post('/test', req,res) {
// broadcast body of request to users namespace
req.users.emit('restreq',req.body) ;
req.timer.register(setInterval(() => {
console.log('hello');
}, 5000));
res.status(200).json('received') ;
}
module.exports = router;