const _ = require('lodash') const dotize = require('dotize') const i18nMW = require('i18next-express-middleware') const i18next = require('i18next') const Promise = require('bluebird') /* global WIKI */ module.exports = { engine: null, namespaces: [], init() { this.namespaces = WIKI.data.localeNamespaces this.engine = i18next this.engine.init({ load: 'languageOnly', ns: this.namespaces, defaultNS: 'common', saveMissing: false, lng: WIKI.config.site.lang, fallbackLng: 'en' }) // Load fallback defaults const enFallback = require('../locales/default.json') if (_.isPlainObject(enFallback)) { _.forOwn(enFallback, (data, ns) => { this.namespaces.push(ns) this.engine.addResourceBundle('en', ns, data) }) } // Load current language this.loadLocale(WIKI.config.site.lang, { silent: true }) return this }, attachMiddleware (app) { app.use(i18nMW.handle(this.engine)) }, async getByNamespace(locale, namespace) { if (this.engine.hasResourceBundle(locale, namespace)) { let data = this.engine.getResourceBundle(locale, namespace) return _.map(dotize.convert(data), (value, key) => { return { key, value } }) } else { throw new Error('Invalid locale or namespace') } }, async loadLocale(locale, opts = { silent: false }) { const res = await WIKI.db.Locale.findOne({ where: { code: locale } }) if (res) { if (_.isPlainObject(res.strings)) { _.forOwn(res.strings, (data, ns) => { this.namespaces.push(ns) this.engine.addResourceBundle(locale, ns, data, true, true) }) } } else if (!opts.silent) { throw new Error('No such locale in local store.') } }, async setCurrentLocale(locale) { return Promise.fromCallback(cb => { return this.engine.changeLanguage(locale, cb) }) } }