26 lines
1.0 KiB
JavaScript
26 lines
1.0 KiB
JavaScript
import { BestAvailableLocale } from './BestAvailableLocale';
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import { UNICODE_EXTENSION_SEQUENCE_REGEX } from './utils';
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/**
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* https://tc39.es/ecma402/#sec-lookupmatcher
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* @param availableLocales
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* @param requestedLocales
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* @param getDefaultLocale
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*/
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export function LookupMatcher(availableLocales, requestedLocales, getDefaultLocale) {
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var result = { locale: '' };
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for (var _i = 0, requestedLocales_1 = requestedLocales; _i < requestedLocales_1.length; _i++) {
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var locale = requestedLocales_1[_i];
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var noExtensionLocale = locale.replace(UNICODE_EXTENSION_SEQUENCE_REGEX, '');
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var availableLocale = BestAvailableLocale(availableLocales, noExtensionLocale);
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if (availableLocale) {
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result.locale = availableLocale;
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if (locale !== noExtensionLocale) {
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result.extension = locale.slice(noExtensionLocale.length, locale.length);
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}
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return result;
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}
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}
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result.locale = getDefaultLocale();
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return result;
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}
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