Rocket.Chat/app/version-check/server/functions/checkVersionUpdate.js

import { TAPi18n } from 'meteor/rocketchat:tap-i18n';
import semver from 'semver';

import getNewUpdates from './getNewUpdates';
import { settings } from '../../../settings';
import { Info } from '../../../utils';
import { Users } from '../../../models';
import logger from '../logger';
import { sendMessagesToAdmins } from '../../../../server/lib/sendMessagesToAdmins';
// import getNewUpdates from '../sampleUpdateData';

export default () => {
	logger.info('Checking for version updates');

	const { versions, alerts } = getNewUpdates();

	const update = {
		exists: false,
		lastestVersion: null,
		security: false,
	};

	const lastCheckedVersion = settings.get('Update_LatestAvailableVersion');
	versions.forEach((version) => {
		if (semver.lte(version.version, lastCheckedVersion)) {
			return;
		}

		if (semver.lte(version.version, Info.version)) {
			return;
		}

		update.exists = true;
		update.lastestVersion = version;

		if (version.security === true) {
			update.security = true;
		}
	});

	if (update.exists) {
		settings.updateById('Update_LatestAvailableVersion', update.lastestVersion.version);

		sendMessagesToAdmins({
			msgs: ({ adminUser }) => [{ msg: `*${ TAPi18n.__('Update_your_RocketChat', adminUser.language) }*\n${ TAPi18n.__('New_version_available_(s)', update.lastestVersion.version, adminUser.language) }\n${ update.lastestVersion.infoUrl }` }],
			banners: [{
				id: `versionUpdate-${ update.lastestVersion.version }`.replace(/\./g, '_'),
				priority: 10,
				title: 'Update_your_RocketChat',
				text: 'New_version_available_(s)',
				textArguments: [update.lastestVersion.version],
				link: update.lastestVersion.infoUrl,
			}],
		});
	}

	if (alerts && alerts.length) {
		sendMessagesToAdmins({
			msgs: ({ adminUser }) => alerts
				.filter((alert) => !Users.bannerExistsById(adminUser._id, `alert-${ alert.id }`))
				.map((alert) => ({
					msg: `*${ TAPi18n.__('Rocket_Chat_Alert', adminUser.language) }:*\n\n*${ TAPi18n.__(alert.title, adminUser.language) }*\n${ TAPi18n.__(alert.text, ...alert.textArguments || [], adminUser.language) }\n${ alert.infoUrl }`,
				})),
			banners: alerts.map((alert) => ({
				id: `alert-${ alert.id }`.replace(/\./g, '_'),
				priority: 10,
				title: alert.title,
				text: alert.text,
				textArguments: alert.textArguments,
				modifiers: alert.modifiers,
				link: alert.infoUrl,
			})),
		});
	}
};