scratch-www/src/init.js

var api = require('./mixins/api.jsx').api;
var jar = require('./lib/jar');

var translations = require('../locales/translations.json');

require('custom-event-polyfill');

// Session
(function () {
    window._session = {};

    /**
     * Binds the object to private session variable and dispatches a global
     * "session" event.
     *
     * @param  {object} Session object
     *
     * @return {void}
     */
    window.updateSession = function (session) {
        window._session = session;
        var sessionEvent = new CustomEvent('session', session);
        window.dispatchEvent(sessionEvent);
    };

    /**
     * Gets a session object from the local proxy method. Calls "updateSession"
     * once session has been returned from the proxy.
     *
     * @return {void}
     */
    window.refreshSession = function () {
        api({
            host: '',
            uri: '/session/'
        }, function (err, body) {
            if (body.banned) {
                return window.location = body.redirectUrl;
            } else {
                window.updateSession(body);
            }
        });
    };

    // Fetch session
    window.refreshSession();
})();

// L10N
(function () {
    /**
     * Bind locale code from cookie if available. Uses navigator language API as a fallback.
     *
     * @return {string}
     */
    function updateLocale () {
        var obj = jar.get('scratchlanguage');
        if (typeof obj === 'undefined') {
            obj = window.navigator.userLanguage || window.navigator.language;
        }
        if (typeof translations[obj] === 'undefined') {
            // Fall back on the split
            obj = obj.split('-')[0];
        }
        if (typeof translations[obj] === 'undefined') {
            // Language appears to not be supported – return `null`
            obj = null;
        }
        return obj;
    }

    window._locale = updateLocale() || 'en';
    window._translations = translations;
})();