76 lines
2.5 KiB
TypeScript
76 lines
2.5 KiB
TypeScript
/*
|
|
* Copyright (C) 2026 Fluxer Contributors
|
|
*
|
|
* This file is part of Fluxer.
|
|
*
|
|
* Fluxer is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Fluxer is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
import {Locales} from '@fluxer/constants/src/Locales';
|
|
import {normalizeRegionCode} from '@fluxer/geo_utils/src/RegionCodeValidation';
|
|
|
|
const DISPLAY_NAME_TYPE: Intl.DisplayNamesOptions['type'] = 'region';
|
|
const DISPLAY_NAME_FALLBACK: Intl.DisplayNamesOptions['fallback'] = 'none';
|
|
|
|
const displayNamesByLocale = new Map<string, Intl.DisplayNames>();
|
|
|
|
function resolveLocale(locale?: string): string {
|
|
const trimmedLocale = locale?.trim();
|
|
if (trimmedLocale && trimmedLocale.length > 0) {
|
|
return trimmedLocale;
|
|
}
|
|
|
|
return Locales.EN_US;
|
|
}
|
|
|
|
function getDisplayNames(locale?: string): Intl.DisplayNames {
|
|
const localeCode = resolveLocale(locale);
|
|
const cachedDisplayNames = displayNamesByLocale.get(localeCode);
|
|
if (cachedDisplayNames) {
|
|
return cachedDisplayNames;
|
|
}
|
|
|
|
const displayNames = new Intl.DisplayNames([localeCode], {
|
|
type: DISPLAY_NAME_TYPE,
|
|
fallback: DISPLAY_NAME_FALLBACK,
|
|
});
|
|
displayNamesByLocale.set(localeCode, displayNames);
|
|
return displayNames;
|
|
}
|
|
|
|
function resolveRegionDisplayNameFromFormatter(
|
|
regionCode: string,
|
|
displayNames: Intl.DisplayNames,
|
|
): string | undefined {
|
|
const normalizedRegionCode = normalizeRegionCode(regionCode);
|
|
if (!normalizedRegionCode) {
|
|
return undefined;
|
|
}
|
|
|
|
return displayNames.of(normalizedRegionCode) ?? undefined;
|
|
}
|
|
|
|
export function resolveRegionDisplayName(regionCode: string, locale?: string): string | undefined {
|
|
const displayNames = getDisplayNames(locale);
|
|
return resolveRegionDisplayNameFromFormatter(regionCode, displayNames);
|
|
}
|
|
|
|
export function resolveRegionDisplayNames(
|
|
regionCodes: ReadonlyArray<string>,
|
|
locale?: string,
|
|
): Array<string | undefined> {
|
|
const displayNames = getDisplayNames(locale);
|
|
return regionCodes.map((regionCode) => resolveRegionDisplayNameFromFormatter(regionCode, displayNames));
|
|
}
|