RocketChat/Rocket.Chat

import { fireGlobalEvent } from '../../../client/lib/utils/fireGlobalEvent';

export const ChromeScreenShare = {
    callbacks: {},
    installed: false,
    init() {
        this.callbacks['get-RocketChatScreenSharingExtensionVersion'] = (version) => {
            if (version) {
                this.installed = true;
            }
        };
        window.postMessage('get-RocketChatScreenSharingExtensionVersion', '*');
    },
    getSourceId(navigator, callback) {
        if (callback == null) {
            throw new Error('"callback" parameter is mandatory.');
        }
        this.callbacks.getSourceId = callback;
        if (navigator === 'electron') {
            return fireGlobalEvent('get-sourceId', '*');
        }
        return window.postMessage('get-sourceId', '*');
    },
};

ChromeScreenShare.init();

window.addEventListener('message', (e) => {
    if (e.origin !== window.location.origin) {
        return;
    }
    if (e.data === 'PermissionDeniedError') {
        if (ChromeScreenShare.callbacks.getSourceId != null) {
            return ChromeScreenShare.callbacks.getSourceId('PermissionDeniedError');
        }
        throw new Error('PermissionDeniedError');
    }
    if (e.data.version != null) {
        ChromeScreenShare.callbacks['get-RocketChatScreenSharingExtensionVersion'] &&
            ChromeScreenShare.callbacks['get-RocketChatScreenSharingExtensionVersion'](e.data.version);
    } else if (e.data.sourceId != null) {
        return typeof ChromeScreenShare.callbacks.getSourceId === 'function' && ChromeScreenShare.callbacks.getSourceId(e.data.sourceId);
    }
});