Delete detect-annotation-preference.js

middleware/detect-annotation-preference.js

@@ -1,68 +0,0 @@
-import languages, { languageKeys } from '../lib/languages.js'
-import parser from 'accept-language-parser'
-
-import { USER_LANGUAGE_COOKIE_NAME } from '../lib/constants.js'
-
-const chineseRegions = [
-  'CN', // Mainland
-  'HK', // Hong Kong
-  'SG', // Singapore
-  'TW', // Taiwan
-]
-
-function translationExists(language) {
-  if (language.code === 'zh') {
-    return chineseRegions.includes(language.region)
-  }
-  // 92BD1212-61B8-4E7A: Remove ` && !languages[language.code].wip` for the public ship of ko, fr, de, ru
-  return languageKeys.includes(language.code) && !languages[language.code].wip
-}
-
-function getLanguageCode(language) {
-  return language.code === 'cn' && chineseRegions.includes(language.region) ? 'zh' : language.code
-}
-
-function getUserLanguage(browserLanguages) {
-  try {
-    let numTopPreferences = 1
-    for (let lang = 0; lang < browserLanguages.length; lang++) {
-      // If language has multiple regions, Chrome adds the non-region language to list
-      if (lang > 0 && browserLanguages[lang].code !== browserLanguages[lang - 1].code)
-        numTopPreferences++
-      if (translationExists(browserLanguages[lang]) && numTopPreferences < 3) {
-        return getLanguageCode(browserLanguages[lang])
-      }
-    }
-  } catch {
-    return undefined
-  }
-}
-
-function getUserLanguageFromCookie(req) {
-  const value = req.cookies[USER_LANGUAGE_COOKIE_NAME]
-  // 92BD1212-61B8-4E7A: Remove ` && !languages[value].wip` for the public ship of ko, fr, de, ru
-  if (value && languages[value] && !languages[value].wip) {
-    return value
-  }
-}
-
-// determine language code from a path. Default to en if no valid match
-export function getLanguageCodeFromPath(path) {
-  const maybeLanguage = (path.split('/')[path.startsWith('/_next/data/') ? 4 : 1] || '').slice(0, 2)
-  return languageKeys.includes(maybeLanguage) ? maybeLanguage : 'en'
-}
-
-export function getLanguageCodeFromHeader(req) {
-  const browserLanguages = parser.parse(req.headers['accept-language'])
-  return getUserLanguage(browserLanguages)
-}
-
-export default function detectLanguage(req, res, next) {
-  req.language = getLanguageCodeFromPath(req.path)
-  // Detecting browser language by user preference
-  req.userLanguage = getUserLanguageFromCookie(req)
-  if (!req.userLanguage) {
-    req.userLanguage = getLanguageCodeFromHeader(req)
-  }
-  return next()
-}