WIP refactor regional logic

src/hooks/useLanguage.ts

@@ -1,45 +1,19 @@
 import { useCallback, useEffect, useState } from 'preact/hooks';
 import {
   ConsentManagerSupportedTranslationValue,
   LocaleValue,
   LOCALE_KEY,
   LOCALE_TRANSLATION_MAP,
   TranslatedMessages,
   Translations,
 } from '@transcend-io/internationalization';
 import { settings } from '../settings';
 import { getUserLocales } from '../utils/get-user-locales';
 import { substituteHtml } from '../utils/substitute-html';
 import { invertSafe } from '@transcend-io/type-utils';
 
 export const loadedTranslations: Translations = Object.create(null);
 
-/** Mapping of AWS base translation keys to list of Transcend locales that should use them */
-export const INVERTED_TRANSLATE_LOCALE = invertSafe(LOCALE_TRANSLATION_MAP);
-
-const getDuplicativeLocales = (lang: LocaleValue): LocaleValue[] =>
-  INVERTED_TRANSLATE_LOCALE[LOCALE_TRANSLATION_MAP[lang]];
-
-/**
- * Get nearest matching locale from a list of supported locales
- *
- * @param preferred - Sorted locale list in order of most preferable to least preferable
- * @param supported - List of supported locales to match from
- * @returns Nearest supported locale, sorted by preferred locale list
- */
-export const getNearestSupportedLocale = (
-  preferred: LocaleValue[],
-  supported: LocaleValue[],
-): LocaleValue | undefined => {
-  // eslint-disable-next-line no-restricted-syntax
-  for (const preferredLocale of preferred) {
-    if (supported.includes(preferredLocale)) {
-      return preferredLocale;
-    }
-  }
-  return undefined;
-};
-
 /**
  * Picks a default language for the user
  *
@@ -59,16 +33,16 @@
    * e.g. instead of just having en, include en-US, en-GB, en-AU, etc
    */
   const extendedSupportedLanguages = supportedLocales.flatMap((lang) =>
     getDuplicativeLocales(lang),
   );
   const nearestExtendedLanguage =
     getNearestSupportedLocale(preferredLocales, extendedSupportedLanguages) ||
     LOCALE_KEY.En;
 
   let nearestTranslation = nearestExtendedLanguage;
   if (!(supportedLocales as string[]).includes(nearestTranslation)) {
     nearestTranslation =
       getDuplicativeLocales(nearestTranslation).find((lang) =>
         supportedLocales.includes(
           lang as ConsentManagerSupportedTranslationValue,
         ),