Typescript internal function call not working

Question

I'm using Typescript and have a class. within that class I have a constructor and method, but I cant seem to call that method within the body of the function:

import  { ParentPlayer } from './parentPlayer'
import ws = require('ws')

export class MasterSocket{

    constructor(masterPlayer:ParentPlayer, serverPort:number, Notifier:any) {
       createPipeline(masterPlayer,serverPort,Notifier)
    }

    function createPipeline(masterPlayer:ParentPlayer, serverPort:number, Notifier:any){
    if(masterPlayer !== null)
      {
        const wss:ws.Server = new ws.Server({ port: serverPort})
        wss.on('connection', function connection(svr) {
            Notifier.emit('test','Pipeline established')

            svr.onmessage = (msg) =>
            {
                Notifier.emit('test','Message received at Pipeline: ' + msg)
            }

            svr.onclose = (evt) =>
            {
                Notifier.emit('test','Backend: Pipeline Closed: ' + evt.reason)
     >>>>>>>    createPipeline(masterPlayer,serverPort,Notifier)
            }

            svr.on('message', function incoming(message) {
            Notifier.emit('test','message received from: ' + message)
            })

          svr.send('this is a message sent from the Pipeline');
        })
      }
    }
}

any help would be greatly appreciated

eol · Accepted Answer · 2020-06-17 13:12:48Z

2

As peinearydevelopment has already mentioned, you need to remove the function keyword in order for createPipeline to be an actual method of the class.

But you also need to convert your onConnection callback to an arrow function in order to preserve the this context of the class (more on this here):

wss.on('connection', connection(svr) => {
    // ...

    svr.onclose = (evt) => {
        Notifier.emit('test', 'Backend: Pipeline Closed: ' + evt.reason)
        this.createPipeline(masterPlayer, serverPort, Notifier)
    }
    //...
});

edited Jun 17, 2020 at 13:12

answered Jun 17, 2020 at 13:06

eol

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1 Comment

RSH Over a year ago

Okay this is what worked...thank you: wss.on('connection', svr => {

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