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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 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 + namespaces
this.refreshNamespaces(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.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)
})
}
}