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.lang.code, fallbackLng: 'en' }) // Load current language + namespaces this.refreshNamespaces(true) // Listen for localization events WIKI.events.on('localization', (action) => { switch (action) { case 'reload': this.refreshNamespaces() break } }) 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.models.locales.query().findOne('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 refreshNamespaces (silent = false) { await this.loadLocale(WIKI.config.lang.code, { silent }) if (WIKI.config.lang.namespacing) { for (let ns of WIKI.config.lang.namespaces) { await this.loadLocale(ns, { silent }) } } }, async setCurrentLocale(locale) { await Promise.fromCallback(cb => { return this.engine.changeLanguage(locale, cb) }) } }