upstream-rocketchat/apps/meteor/client/providers/UserProvider/hooks/useUpdateAvatar.ts

import { useUserId, useStream } from '@rocket.chat/ui-contexts';
import { useEffect } from 'react';

import { Users } from '../../../stores';

export const useUpdateAvatar = () => {
	const notify = useStream('notify-logged');
	const uid = useUserId();
	useEffect(() => {
		if (!uid) {
			return;
		}
		return notify('updateAvatar', (data) => {
			if ('username' in data) {
				const { username, etag } = data;
				username &&
					Users.state.update(
						(record) => record.username === username,
						(record) => ({ ...record, avatarETag: etag }),
					);
			}
		});
	}, [notify, uid]);
};