From 698c31943ea9d8d021782f6b9e865d41c09decce Mon Sep 17 00:00:00 2001
From: Enrico Ros <enrico.ros@gmail.com>
Date: Sat, 6 Apr 2024 14:27:21 -0700
Subject: [PATCH] Centralize Lang

---
 src/common/state/store-ui.ts     | 3 ++-
 src/common/util/pwaUtils.ts      | 5 +++++
 src/modules/persona/pmix/pmix.ts | 5 +++--
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/src/common/state/store-ui.ts b/src/common/state/store-ui.ts
index b66a9ae2f..6fd702ba4 100644
--- a/src/common/state/store-ui.ts
+++ b/src/common/state/store-ui.ts
@@ -3,6 +3,7 @@ import { create } from 'zustand';
 import { persist } from 'zustand/middleware';
 
 import type { ContentScaling } from '~/common/app.theme';
+import { browserLangOrUS } from '~/common/util/pwaUtils';
 
 
 // UI Preferences
@@ -54,7 +55,7 @@ export const useUIPreferencesStore = create<UIPreferencesStore>()(
 
       // UI Features
 
-      preferredLanguage: (typeof navigator !== 'undefined') && navigator.language || 'en-US',
+      preferredLanguage: browserLangOrUS,
       setPreferredLanguage: (preferredLanguage: string) => set({ preferredLanguage }),
 
       centerMode: 'wide',
diff --git a/src/common/util/pwaUtils.ts b/src/common/util/pwaUtils.ts
index 89d04e5b2..d13dbddc3 100644
--- a/src/common/util/pwaUtils.ts
+++ b/src/common/util/pwaUtils.ts
@@ -10,6 +10,11 @@ export const isMacUser = /Macintosh|MacIntel|MacPPC|Mac68K|iPad/.test(safeUA);
 export const isChromeDesktop = safeUA.includes('Chrome') && !safeUA.includes('Mobile');
 export const isFirefox = safeUA.includes('Firefox');
 
+// frontend language
+const browserLang = isBrowser ? window.navigator.language : '';
+export const browserLangOrUS = browserLang || 'en-US';
+export const browserLangNotUS = browserLangOrUS !== 'en-US';
+
 // deployment environment
 export const isVercelFromBackendOrSSR = !!process.env.VERCEL_ENV;
 export const isVercelFromFrontend = !!process.env.NEXT_PUBLIC_VERCEL_URL;
diff --git a/src/modules/persona/pmix/pmix.ts b/src/modules/persona/pmix/pmix.ts
index a68041a93..cdc9ffe27 100644
--- a/src/modules/persona/pmix/pmix.ts
+++ b/src/modules/persona/pmix/pmix.ts
@@ -1,5 +1,7 @@
 import { DLLMId, getKnowledgeMapCutoff } from '~/modules/llms/store-llms';
 
+import { browserLangOrUS } from '~/common/util/pwaUtils';
+
 /*type Variables =
   | '{{Today}}'
   | '{{Cutoff}}'
@@ -48,10 +50,9 @@ export function bareBonesPromptMixer(_template: string, assistantLlmId: DLLMId |
 
   // {{LocaleNow}} - enough information to get on the same page with the user
   if (mixed.includes('{{LocaleNow}}')) {
-    const userLocale = navigator.language || 'en-US';
     // const userTimezone = Intl.DateTimeFormat().resolvedOptions().timeZone || 'UTC';
     // Format the current date and time according to the user's locale and timezone
-    const formatter = new Intl.DateTimeFormat(userLocale, {
+    const formatter = new Intl.DateTimeFormat(browserLangOrUS, {
       weekday: 'short', // Full name of the day of the week
       year: 'numeric', // Numeric year
       month: 'short', // Full name of the month