zulip-desktop/app/renderer/js/utils/domain-util.js

'use strict';

const {app} = require('electron').remote;
const JsonDB = require('node-json-db');
const request = require('request');

class DomainUtil {
    constructor() {
        this.db = new JsonDB(app.getPath('userData') + '/domain.json', true, true);
    }

    getDomains() {
        return this.db.getData('/domains');
    }

    addDomain(server) {
        server.icon = server.icon || 'https://chat.zulip.org/static/images/logo/zulip-icon-128x128.271d0f6a0ca2.png';
        this.db.push("/domains[]", server, true);
    }

    removeDomains() {
        this.db.delete("/domains");
    }

    removeDomain(index) {
        this.db.delete(`/domains[${index}]`);
    }

    checkDomain(domain) {
        const hasPrefix = (domain.indexOf('http') == 0);
        if (!hasPrefix) {
            domain = (domain.indexOf('localhost:') >= 0)? `http://${domain}` : `https://${domain}`;
        }

		const checkDomain = domain + '/static/audio/zulip.ogg';

        return new Promise((res, rej) => {
            request(checkDomain, (error, response) => {
                if (!error && response.statusCode !== 404) {
                    res(domain);
                } else {
                    rej('Not a valid Zulip server');
                }
            });
        })
    }
}

module.exports = DomainUtil;