translation-redirect.js

js smartsheet.com collected 2026-09-24 06:23:23 UTC 3,450 bytes, 101 lines download raw bytes

1(function languageRedirect() {
2  function setLanguageSetting(key, value) {
3    const settings = getLanguageSetting();
4    settings[key] = value;
5    const str = encodeURIComponent(JSON.stringify(settings));
6    // Keep settings for a month (can revisit length later).
7    const expiration = Date.now() + 30 * 24 * 3600 * 1000;
8    window.document.cookie = `translationRedirect=${str}; expires=${expiration}; path=/; domain=smartsheet.com`
9  }
10
11  function getLanguageSetting(key) {
12    const cookieName = 'translationRedirect';
13    const cookies = window.document.cookie.match('(^|[^;]+)\\s*' + cookieName + '\\s*=\\s*([^;]+)');
14    const cookieValue = (cookies ? cookies.pop() : '');
15    let settings;
16    try {
17      settings = JSON.parse(decodeURIComponent(cookieValue));
18    }
19    catch (e) {
20      settings = {};
21    }
22
23    if (typeof key === 'undefined') {
24      return settings;
25    }
26    return settings[key] ?? null;
27  }
28
29  function okToRedirect() {
30    // Allow people to opt out.
31    if (getLanguageSetting('optOut')) {
32      return false;
33    }
34    if (window.location.search.match(/fl_redir=opt_out/)) {
35      setLanguageSetting('optOut', 1);
36      return false;
37    }
38
39    // Avoid redirect loops.
40    if (window.location.search.match(/fl_redir=/)) {
41      return false;
42    }
43
44    // If the last redirect was within the last hour, don't do it again.
45    const lastRedirect = getLanguageSetting('lastRedirect') ?? 0;
46    const startRedirectingAgain = lastRedirect + (1000 * 60 * 60);
47    if (Date.now() < startRedirectingAgain) {
48      return false;
49    }
50    return true;
51  }
52
53  // Don't redirect anyone who has recently been redirected:
54  if (!okToRedirect()) {
55    return;
56  }
57
58  // Determine whether one of the languages we have available for this content
59  // is a better match for the user's preferences than the one we're on.
60  let available;
61  try {
62    available = new Set(JSON.parse(atob(document.documentElement.dataset.availableLanguages)));
63  }
64  catch (e) {
65    available = new Set();
66  }
67  const userPreferences = new Set(navigator.languages.map(langcode => langcode.split('-')[0]));
68  const bestChoices = userPreferences.intersection(available);
69
70  // The <html lang=""> attribute reports the current language.
71  const currentLanguage = document.documentElement.lang ?? '';
72  // We serve untranslated content with status code 404, and we can detect if
73  // we're on such a 404 page, because the current language won't be one of
74  // the languages Drupal reported it has available for this content.
75  const is404Message = !available.has(currentLanguage);
76
77  // If we're on a page where the user speaks the language, no redirect needed.
78  if (userPreferences.has(currentLanguage) && !is404Message) {
79    return;
80  }
81  // See if we have a translation available in one of the user's languages.
82  if (bestChoices.size > 0) {
83    const preferredLangcode = Array.from(bestChoices)[0];
84    // Last-minute bailout: If we are redirecting to English, don't do it.
85    // English speakers don't need this functionality, and the SEO effects
86    // are not great.
87    if (preferredLangcode === 'en') {
88      return;
89    }
90
91    // Redirect to the preferred language:
92    setLanguageSetting('lastRedirect', Date.now());
93    const param = `ss_lc=${preferredLangcode}_XX&fl_redir=1`;
94    if (window.location.search) {
95      window.location.search += `&${param}`;
96    }
97    else {
98      window.location.search = `${param}`;
99    }
100  }
101})();

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