habitica/website/server/middlewares/locals.js

import nconf from 'nconf';
import _ from 'lodash';
import shared from '../../common';
import * as i18n from '../libs/i18n';
import {
  getBuildUrl,
  getManifestFiles,
} from '../libs/buildManifest';
import { tavernQuest } from '../models/group';
import { mods } from '../models/user';

// To avoid stringifying more data then we need,
// items from `env` used on the client will have to be specified in this array
const CLIENT_VARS = ['language', 'isStaticPage', 'availableLanguages', 'translations',
                     'FACEBOOK_KEY', 'GOOGLE_CLIENT_ID', 'FACEBOOK_ANALYTICS', 'NODE_ENV', 'BASE_URL', 'GA_ID',
                     'AMAZON_PAYMENTS', 'STRIPE_PUB_KEY', 'AMPLITUDE_KEY',
                     'worldDmg', 'mods', 'IS_MOBILE', 'PUSHER:KEY', 'PUSHER:ENABLED'];

let env = {
  getManifestFiles,
  getBuildUrl,
  _,
  clientVars: CLIENT_VARS,
  mods,
  Content: shared.content,
  availableLanguages: i18n.availableLanguages,
  AMAZON_PAYMENTS: {
    SELLER_ID: nconf.get('AMAZON_PAYMENTS:SELLER_ID'),
    CLIENT_ID: nconf.get('AMAZON_PAYMENTS:CLIENT_ID'),
  },
};

'NODE_ENV BASE_URL GA_ID STRIPE_PUB_KEY FACEBOOK_ANALYTICS FACEBOOK_KEY GOOGLE_CLIENT_ID AMPLITUDE_KEY PUSHER:KEY PUSHER:ENABLED'
  .split(' ')
  .forEach(key => {
    env[key] = nconf.get(key);
  });

module.exports = function locals (req, res, next) {
  let language = _.find(i18n.availableLanguages, {code: req.language});
  let isStaticPage = req.url.split('/')[1] === 'static'; // If url contains '/static/'

  // Load moment.js language file only when not on static pages
  language.momentLang = !isStaticPage && i18n.momentLangs[language.code] || undefined;

  res.locals.habitrpg = _.assign(env, {
    IS_MOBILE: /Android|webOS|iPhone|iPad|iPod|BlackBerry/i.test(req.header('User-Agent')),
    language,
    isStaticPage,
    translations: i18n.translations[language.code],
    t (...args) { // stringName and vars are the allowed parameters
      args.push(language.code);
      return shared.i18n.t(...args);
    },
    // Defined here and not outside of the middleware because tavernQuest might be an
    // empty object until the query to fetch it finishes
    worldDmg: tavernQuest && tavernQuest.extra && tavernQuest.extra.worldDmg || {},
  });

  next();
};