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NimBold
59 lines
2.4 KiB
TypeScript
59 lines
2.4 KiB
TypeScript
export const APP_LOCALES = ['en', 'zh-CN', 'he', 'fa', 'uk', 'ru'] as const;
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export const APP_LOCALE_PREFERENCES = ['system', ...APP_LOCALES] as const;
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export type AppLocale = typeof APP_LOCALES[number];
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export type AppLocalePreference = typeof APP_LOCALE_PREFERENCES[number];
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export type AppLocaleDirection = 'ltr' | 'rtl';
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export type AppPluralVariant = 'one' | 'few' | 'many';
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export const DEFAULT_LOCALE: AppLocale = 'en';
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export const APP_LOCALE_METADATA: Record<AppLocale, {
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direction: AppLocaleDirection;
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isTranslated: boolean;
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}> = {
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en: { direction: 'ltr', isTranslated: true },
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'zh-CN': { direction: 'ltr', isTranslated: true },
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he: { direction: 'rtl', isTranslated: true },
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fa: { direction: 'rtl', isTranslated: true },
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uk: { direction: 'ltr', isTranslated: true },
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ru: { direction: 'ltr', isTranslated: true },
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};
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export const isAppLocale = (value: unknown): value is AppLocale =>
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typeof value === 'string' && (APP_LOCALES as readonly string[]).includes(value);
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export const isAppLocalePreference = (value: unknown): value is AppLocalePreference =>
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typeof value === 'string' && (APP_LOCALE_PREFERENCES as readonly string[]).includes(value);
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/**
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* Resolve a system or persisted BCP 47 language tag to a bundled Firelink
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* locale. Unknown languages fall back to English.
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*/
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export const resolveAppLocale = (value: string | null | undefined): AppLocale => {
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const normalized = value?.trim().replace(/_/g, '-').toLowerCase();
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if (!normalized) return DEFAULT_LOCALE;
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if (normalized === 'zh-cn' || normalized.startsWith('zh-')) return 'zh-CN';
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if (normalized === 'he' || normalized.startsWith('he-') || normalized === 'iw' || normalized.startsWith('iw-')) return 'he';
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if (normalized === 'fa' || normalized.startsWith('fa-')) return 'fa';
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if (normalized === 'uk' || normalized.startsWith('uk-')) return 'uk';
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if (normalized === 'ru' || normalized.startsWith('ru-')) return 'ru';
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if (normalized === 'en' || normalized.startsWith('en-')) return 'en';
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return DEFAULT_LOCALE;
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};
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export const localePluralVariant = (
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value: string | null | undefined,
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count: number
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): AppPluralVariant => {
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const category = new Intl.PluralRules(resolveAppLocale(value)).select(Math.abs(count));
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if (category === 'one') return 'one';
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if (category === 'few') return 'few';
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return 'many';
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};
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export const localeDirection = (locale: AppLocale): AppLocaleDirection =>
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APP_LOCALE_METADATA[locale].direction;
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