@formatjs/intl-localematcher
Version:
Intl.LocaleMatcher ponyfill
104 lines (103 loc) • 4.29 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.ResolveLocale = ResolveLocale;
var BestFitMatcher_1 = require("./BestFitMatcher");
var CanonicalizeUValue_1 = require("./CanonicalizeUValue");
var InsertUnicodeExtensionAndCanonicalize_1 = require("./InsertUnicodeExtensionAndCanonicalize");
var LookupMatcher_1 = require("./LookupMatcher");
var UnicodeExtensionComponents_1 = require("./UnicodeExtensionComponents");
var utils_1 = require("./utils");
/**
* https://tc39.es/ecma402/#sec-resolvelocale
*/
function ResolveLocale(availableLocales, requestedLocales, options, relevantExtensionKeys, localeData, getDefaultLocale) {
var _a;
var matcher = options.localeMatcher;
var r;
if (matcher === 'lookup') {
r = (0, LookupMatcher_1.LookupMatcher)(Array.from(availableLocales), requestedLocales, getDefaultLocale);
}
else {
r = (0, BestFitMatcher_1.BestFitMatcher)(Array.from(availableLocales), requestedLocales, getDefaultLocale);
}
if (r == null) {
r = {
locale: getDefaultLocale(),
extension: '',
};
}
var foundLocale = r.locale;
var foundLocaleData = localeData[foundLocale];
// TODO: We can't really guarantee that the locale data is available
// invariant(
// foundLocaleData !== undefined,
// `Missing locale data for ${foundLocale}`
// )
var result = { locale: 'en', dataLocale: foundLocale };
var components;
var keywords;
if (r.extension) {
components = (0, UnicodeExtensionComponents_1.UnicodeExtensionComponents)(r.extension);
keywords = components.keywords;
}
else {
keywords = [];
}
var supportedKeywords = [];
var _loop_1 = function (key) {
// TODO: Shouldn't default to empty array, see TODO above
var keyLocaleData = (_a = foundLocaleData === null || foundLocaleData === void 0 ? void 0 : foundLocaleData[key]) !== null && _a !== void 0 ? _a : [];
(0, utils_1.invariant)(Array.isArray(keyLocaleData), "keyLocaleData for ".concat(key, " must be an array"));
var value = keyLocaleData[0];
(0, utils_1.invariant)(value === undefined || typeof value === 'string', "value must be a string or undefined");
var supportedKeyword = void 0;
var entry = keywords.find(function (k) { return k.key === key; });
if (entry) {
var requestedValue = entry.value;
if (requestedValue !== '') {
if (keyLocaleData.indexOf(requestedValue) > -1) {
value = requestedValue;
supportedKeyword = {
key: key,
value: value,
};
}
}
else if (keyLocaleData.indexOf('true') > -1) {
value = 'true';
supportedKeyword = {
key: key,
value: value,
};
}
}
var optionsValue = options[key];
(0, utils_1.invariant)(optionsValue == null || typeof optionsValue === 'string', "optionsValue must be a string or undefined");
if (typeof optionsValue === 'string') {
var ukey = key.toLowerCase();
optionsValue = (0, CanonicalizeUValue_1.CanonicalizeUValue)(ukey, optionsValue);
if (optionsValue === '') {
optionsValue = 'true';
}
}
if (optionsValue !== value && keyLocaleData.indexOf(optionsValue) > -1) {
value = optionsValue;
supportedKeyword = undefined;
}
if (supportedKeyword) {
supportedKeywords.push(supportedKeyword);
}
result[key] = value;
};
for (var _i = 0, relevantExtensionKeys_1 = relevantExtensionKeys; _i < relevantExtensionKeys_1.length; _i++) {
var key = relevantExtensionKeys_1[_i];
_loop_1(key);
}
var supportedAttributes = [];
if (supportedKeywords.length > 0) {
supportedAttributes = [];
foundLocale = (0, InsertUnicodeExtensionAndCanonicalize_1.InsertUnicodeExtensionAndCanonicalize)(foundLocale, supportedAttributes, supportedKeywords);
}
result.locale = foundLocale;
return result;
}