mlogclub
77 lines
1.8 KiB
TypeScript
77 lines
1.8 KiB
TypeScript
export const SUPPORTED_LOCALES = ["zh-CN", "en-US"] as const
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export type AppLocale = (typeof SUPPORTED_LOCALES)[number]
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export const DEFAULT_LOCALE: AppLocale = "zh-CN"
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export const LOCALE_STORAGE_KEY = "cs_ai_agent_locale"
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const LOCALE_ALIASES: Record<string, AppLocale> = {
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zh: "zh-CN",
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"zh-cn": "zh-CN",
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zh_cn: "zh-CN",
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"zh-hans": "zh-CN",
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en: "en-US",
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"en-us": "en-US",
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en_us: "en-US",
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}
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export function normalizeLocale(value: string | null | undefined): AppLocale {
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return normalizeSupportedLocale(value) ?? DEFAULT_LOCALE
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}
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function normalizeSupportedLocale(
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value: string | null | undefined
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): AppLocale | null {
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if (!value) {
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return null
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}
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const key = value.trim().toLowerCase()
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return LOCALE_ALIASES[key] ?? null
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}
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export function isSupportedLocale(
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value: string | null | undefined
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): value is AppLocale {
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if (!value) {
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return false
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}
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return SUPPORTED_LOCALES.includes(value as AppLocale)
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}
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export function resolveBrowserLocale({
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storedLocale,
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navigatorLanguages,
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}: {
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storedLocale?: string | null
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navigatorLanguages?: readonly string[] | null
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}): AppLocale {
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if (isSupportedLocale(storedLocale)) {
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return storedLocale
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}
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for (const locale of navigatorLanguages ?? []) {
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const normalized = normalizeSupportedLocale(locale)
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if (normalized) {
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return normalized
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}
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}
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return DEFAULT_LOCALE
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}
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export function readStoredLocale(): AppLocale {
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if (typeof window === "undefined") {
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return DEFAULT_LOCALE
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}
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return resolveBrowserLocale({
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storedLocale: window.localStorage.getItem(LOCALE_STORAGE_KEY),
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navigatorLanguages: window.navigator.languages,
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})
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}
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export function writeStoredLocale(locale: AppLocale) {
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if (typeof window === "undefined") {
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return
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}
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window.localStorage.setItem(LOCALE_STORAGE_KEY, locale)
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}
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