comunicapiv2/src/controllers/RTCRelayController.ts

import * as ws from 'ws';
import { Request } from 'express';
import { conf } from '../helpers/ConfigHelper';

/**
 * RTC WebSocket relay controller
 * 
 * @author Pierre HUBERT
 */

export class RTCRelayController {

	/**
	 * Current WebSocket connection
	 */
	private static currWs: ws;

	/**
	 * Open new websocket
	 * 
	 * @param req Request
	 * @param ws Websocket
	 */
	public static async OpenWS(req: Request, ws: ws) {

		// First, check if sockets are enabled
		if(!conf().rtc_relay) {
			ws.send("rtc relay not configured!");
			ws.close();
			return;
		}

		const cnf = conf().rtc_relay;

		// Then check remote IP address
		if(cnf.ip && cnf.ip != req.ip) {
			ws.send("unkown IP address : "+req.ip)
			ws.close();
			return;
		}

		// Finally, check access token
		if(!req.query.hasOwnProperty("token") || req.query.token !== cnf.token) {
			ws.send("invalid token!");
			ws.close();
			return;
		}

		// Close previous connection
		if(this.currWs && this.currWs.readyState == ws.OPEN) {
			this.currWs.close();
		}

		console.info("Connected to RTC relay.");
		this.currWs = ws;

		// Register to events
	}

}