zulip-desktop/app/main/linuxupdater.ts

import {app, Notification, net} from 'electron';

import getStream from 'get-stream';
import semver from 'semver';
import * as ConfigUtil from '../renderer/js/utils/config-util';
import * as LinuxUpdateUtil from '../renderer/js/utils/linux-update-util';
import Logger from '../renderer/js/utils/logger-util';
import {fetchResponse} from './request';

const logger = new Logger({
	file: 'linux-update-util.log',
	timestamp: true
});

export async function linuxUpdateNotification(session: Electron.session): Promise<void> {
	let	url = 'https://api.github.com/repos/zulip/zulip-desktop/releases';
	url = ConfigUtil.getConfigItem('betaUpdate') ? url : url + '/latest';

	try {
		const response = await fetchResponse(net.request({url, session}));
		if (response.statusCode !== 200) {
			logger.log('Linux update response status: ', response.statusCode);
			return;
		}

		const data = JSON.parse(await getStream(response));
		const latestVersion = ConfigUtil.getConfigItem('betaUpdate') ? data[0].tag_name : data.tag_name;
		if (typeof latestVersion !== 'string') {
			throw new TypeError('Expected string for tag_name');
		}

		if (semver.gt(latestVersion, app.getVersion())) {
			const notified = LinuxUpdateUtil.getUpdateItem(latestVersion);
			if (notified === null) {
				new Notification({title: 'Zulip Update', body: `A new version ${latestVersion} is available. Please update using your package manager.`}).show();
				LinuxUpdateUtil.setUpdateItem(latestVersion, true);
			}
		}
	} catch (error) {
		logger.error('Linux update error.');
		logger.error(error);
	}
}