Update language util to get region from the locale code where available

This commit is contained in:
William Oldham 2024-01-06 10:42:48 +00:00
parent 04906f1f87
commit eec1e28e8e

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@ -5,19 +5,11 @@ const languageOrder = ["en", "hi", "fr", "de", "nl", "pt"];
// mapping of language code to country code. // mapping of language code to country code.
// multiple mappings can exist, since languages are spoken in multiple countries. // multiple mappings can exist, since languages are spoken in multiple countries.
// This mapping purely exists to prioritize a country over another in languages. // This mapping purely exists to prioritize a country over another in languages where the
// base language code does not contain a region (i.e. if the language code is zh-Hant where Hant is a script)
// iso639_1 -> iso3166 Alpha-2 // iso639_1 -> iso3166 Alpha-2
const countryPriority: Record<string, string> = { const countryPriority: Record<string, string> = {
en: "us",
nl: "nl",
fr: "fr",
de: "de",
pt: "pt",
ar: "sa",
es: "es",
zh: "cn", zh: "cn",
ko: "kr",
ta: "lk",
}; };
// list of iso639_1 Alpha-2 codes used as default languages // list of iso639_1 Alpha-2 codes used as default languages
@ -89,7 +81,7 @@ function populateLanguageCode(language: string): string {
} }
/** /**
* @param locale idk what kinda code this takes, anytihhng in ietf format I guess * @param locale idk what kinda code this takes, anything in ietf format I guess
* @returns pretty format for language, null if it no info can be found for language * @returns pretty format for language, null if it no info can be found for language
*/ */
export function getPrettyLanguageNameFromLocale(locale: string): string | null { export function getPrettyLanguageNameFromLocale(locale: string): string | null {
@ -105,12 +97,12 @@ export function getPrettyLanguageNameFromLocale(locale: string): string | null {
} }
/** /**
* Sort locale codes by occurance, rest on alphabetical order * Sort locale codes by occurrence, rest on alphabetical order
* @param langCodes list language codes to sort * @param langCodes list language codes to sort
* @returns sorted version of inputted list * @returns sorted version of inputted list
*/ */
export function sortLangCodes(langCodes: string[]) { export function sortLangCodes(langCodes: string[]) {
const languagesOrder = [...languageOrder].reverse(); // Reverse is neccesary, not sure why const languagesOrder = [...languageOrder].reverse(); // Reverse is necessary, not sure why
const results = langCodes.sort((a, b) => { const results = langCodes.sort((a, b) => {
const langOrderA = languagesOrder.findIndex( const langOrderA = languagesOrder.findIndex(
@ -137,20 +129,34 @@ export function getCountryCodeForLocale(locale: string): string | null {
const tag = getTag(locale, true); const tag = getTag(locale, true);
if (!tag?.language?.Subtag) return null; if (!tag?.language?.Subtag) return null;
// this function isnt async, so its garuanteed to work like this // this function isn't async, so its guaranteed to work like this
countryLanguages.getLanguage(tag.language.Subtag, (_err, lang) => { countryLanguages.getLanguage(tag.language.Subtag, (_err, lang) => {
if (lang) output = lang; if (lang) output = lang;
}); });
if (!output) return null; if (!output) return null;
const priority = countryPriority[output.iso639_1.toLowerCase()]; const priority = countryPriority[output.iso639_1.toLowerCase()];
if (output.countries.length === 0) { if (output.countries.length === 0) {
return priority ?? null; return priority ?? null;
} }
// If the language contains a region, check that against the countries and
// return the region if it matches
const regionSubtag = tag?.region?.Subtag.toLowerCase();
if (regionSubtag) {
const regionCode = output.countries.find(
(c) =>
c.code_2.toLowerCase() === regionSubtag ||
c.code_3.toLowerCase() === regionSubtag,
);
if (regionCode) return regionCode.code_2.toLowerCase();
}
if (priority) { if (priority) {
const priotizedCountry = output.countries.find( const prioritizedCountry = output.countries.find(
(v) => v.code_2.toLowerCase() === priority, (v) => v.code_2.toLowerCase() === priority,
); );
if (priotizedCountry) return priotizedCountry.code_2.toLowerCase(); if (prioritizedCountry) return prioritizedCountry.code_2.toLowerCase();
} }
return output.countries[0].code_2.toLowerCase(); return output.countries[0].code_2.toLowerCase();
} }