83 lines
3 KiB
JavaScript
83 lines
3 KiB
JavaScript
const { basename } = require('path')
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const glob = require('glob')
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const areIntlLocalesSupported = require('intl-locales-supported').default
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// Get the supported languages by looking for translations in the `lang/` dir.
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const supportedLanguages = glob
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.sync('./lang/*.json')
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.map((f) => basename(f, '.json'))
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// Polyfill Node with `Intl` that has data for all locales.
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// See: https://formatjs.io/guides/runtime-environments/#server
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if (global.Intl) {
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// Determine if the built-in `Intl` has the locale data we need.
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if (!areIntlLocalesSupported(supportedLanguages)) {
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// `Intl` exists, but it doesn't have the data we need, so load the
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// polyfill and patch the constructors we need with the polyfills.
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const IntlPolyfill = require('intl')
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Intl.NumberFormat = IntlPolyfill.NumberFormat
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Intl.DateTimeFormat = IntlPolyfill.DateTimeFormat
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Intl.__disableRegExpRestore = IntlPolyfill.__disableRegExpRestore
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}
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} else {
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// No `Intl`, so use and load the polyfill.
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global.Intl = require('intl')
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}
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// Fix: https://github.com/vercel/next.js/issues/11777
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// See related issue: https://github.com/andyearnshaw/Intl.js/issues/308
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if (Intl.__disableRegExpRestore) {
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Intl.__disableRegExpRestore()
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}
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// Polyfill DOMParser for **pre-v4** react-intl used by formatjs.
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// Only needed when using FormattedHTMLMessage. Make sure to install `xmldom`.
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// See: https://github.com/vercel/next.js/issues/10533
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// const { DOMParser } = require('xmldom')
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// global.DOMParser = DOMParser
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const { readFileSync } = require('fs')
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const { createServer } = require('http')
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const accepts = require('accepts')
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const next = require('next')
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const port = parseInt(process.env.PORT, 10) || 3000
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const dev = process.env.NODE_ENV !== 'production'
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const app = next({ dev })
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const handle = app.getRequestHandler()
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// We need to expose React Intl's locale data on the request for the user's
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// locale. This function will also cache the scripts by lang in memory.
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const localeDataCache = new Map()
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const getLocaleDataScript = (locale) => {
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const lang = locale.split('-')[0]
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if (!localeDataCache.has(lang)) {
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const localeDataFile = require.resolve(
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`@formatjs/intl-relativetimeformat/dist/locale-data/${lang}`
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)
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const localeDataScript = readFileSync(localeDataFile, 'utf8')
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localeDataCache.set(lang, localeDataScript)
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}
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return localeDataCache.get(lang)
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}
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// We need to load and expose the translations on the request for the user's
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// locale. These will only be used in production, in dev the `defaultMessage` in
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// each message description in the source code will be used.
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const getMessages = (locale) => {
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return require(`./lang/${locale}.json`)
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}
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app.prepare().then(() => {
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createServer((req, res) => {
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const accept = accepts(req)
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const locale = accept.language(supportedLanguages) || 'en'
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req.locale = locale
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req.localeDataScript = getLocaleDataScript(locale)
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req.messages = dev ? {} : getMessages(locale)
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handle(req, res)
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}).listen(port, (err) => {
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if (err) throw err
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console.log(`> Ready on http://localhost:${port}`)
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})
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})
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