Function getUserLanguage

middleware/detect-language.js:25–39

(browserLanguages)

}

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]