37 lines
994 B
TypeScript
37 lines
994 B
TypeScript
import { supportedLangs } from "@/scripts/langmap"
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export function isSupportedLang(langCode: string | null) {
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if (!langCode) return false;
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return supportedLangs[langCode] ?? false;
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}
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/**
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* Compare two language codes to determine whether they are decisively different
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* @returns false if they are close enough
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*/
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export function isSameLanguage(langCode1: string | null, langCode2: string | null) {
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return (
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languageContains(langCode1, langCode2) ||
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languageContains(langCode2, langCode1)
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);
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}
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/**
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* Returns true if langCode1 contains langCode2
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*/
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export function languageContains(langCode1: string | null, langCode2: string | null) {
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if (!langCode1 || !langCode2) return false;
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return parentLanguage(langCode2) === langCode1;
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}
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export function parentLanguage(langCode: string | null) {
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if (!langCode) return null;
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if (["zh-hant", "zh-hans", "yue", "nan"].includes(langCode)) {
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return "zh";
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}
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if (["nb", "nn"].includes(langCode)) {
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return "no";
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}
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return langCode;
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}
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