vn-verdnaturachat/app/lib/methods/subscriptions/room.js

import * as SDK from '@rocket.chat/sdk';

import log from '../../../utils/log';

const subscribe = rid => Promise.all([
	SDK.driver.subscribe('stream-room-messages', rid, false),
	SDK.driver.subscribe('stream-notify-room', `${ rid }/typing`, false),
	SDK.driver.subscribe('stream-notify-room', `${ rid }/deleteMessage`, false)
]);
const unsubscribe = subscriptions => subscriptions.forEach(sub => sub.unsubscribe().catch(() => console.log('unsubscribeRoom')));

let timer = null;
let promises;

const stop = () => {
	if (promises) {
		promises.then(unsubscribe);
		promises = false;
	}

	clearTimeout(timer);
};

export default function subscribeRoom({ rid, t }) {
	if (promises) {
		promises.then(unsubscribe);
		promises = false;
	}
	const loop = (time = new Date()) => {
		if (timer) {
			return;
		}
		timer = setTimeout(async() => {
			try {
				await this.loadMissedMessages({ rid, t });
				timer = false;
				loop();
			} catch (e) {
				loop(time);
			}
		}, 5000);
	};

	// if (!this.connected()) {
	// 	loop();
	// } else {
	SDK.driver.on('logged', () => {
		clearTimeout(timer);
		timer = false;
	});

	SDK.driver.on('disconnected', () => {
		if (SDK.driver.userId) {
			loop();
		}
	});

	try {
		promises = subscribe(rid);
	} catch (e) {
		log('subscribeRoom', e);
	}
	// }

	return {
		stop: () => stop()
	};
}