@formatjs/intl-displaynames
Version:
Polyfill for: https://tc39.es/proposal-intl-displaynames
52 lines (51 loc) • 1.88 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.CanonicalCodeForDisplayNames = CanonicalCodeForDisplayNames;
var ecma402_abstract_1 = require("@formatjs/ecma402-abstract");
var IsValidDateTimeFieldCode_1 = require("./IsValidDateTimeFieldCode");
var UNICODE_REGION_SUBTAG_REGEX = /^([a-z]{2}|[0-9]{3})$/i;
var ALPHA_4 = /^[a-z]{4}$/i;
var UNICODE_TYPE_REGEX = /^[a-z0-9]{3,8}([-_][a-z0-9]{3,8})*$/i;
function isUnicodeRegionSubtag(region) {
return UNICODE_REGION_SUBTAG_REGEX.test(region);
}
function isUnicodeScriptSubtag(script) {
return ALPHA_4.test(script);
}
function isUnicodeLocaleIdentifierType(code) {
return UNICODE_TYPE_REGEX.test(code);
}
function CanonicalCodeForDisplayNames(type, code) {
if (type === 'language') {
return (0, ecma402_abstract_1.CanonicalizeLocaleList)([code])[0];
}
if (type === 'region') {
if (!isUnicodeRegionSubtag(code)) {
throw RangeError('invalid region');
}
return code.toUpperCase();
}
if (type === 'script') {
if (!isUnicodeScriptSubtag(code)) {
throw RangeError('invalid script');
}
return "".concat(code[0].toUpperCase()).concat(code.slice(1).toLowerCase());
}
if (type === 'calendar') {
if (!isUnicodeLocaleIdentifierType(code)) {
throw RangeError('invalid calendar');
}
return code.toLowerCase();
}
if (type === 'dateTimeField') {
if (!(0, IsValidDateTimeFieldCode_1.IsValidDateTimeFieldCode)(code)) {
throw RangeError('invalid dateTimeField');
}
return code;
}
(0, ecma402_abstract_1.invariant)(type === 'currency', 'invalid type');
if (!(0, ecma402_abstract_1.IsWellFormedCurrencyCode)(code)) {
throw RangeError('invalid currency');
}
return code.toUpperCase();
}