wip(docs): i18n (#12681)

1 files changed, 98 insertions, 0 deletions

diff --git a/packages/web/src/i18n/locales.ts b/packages/web/src/i18n/locales.ts
new file mode 100644
index 000000000..50cdaecb5
--- /dev/null
+++ b/packages/web/src/i18n/locales.ts
@@ -0,0 +1,98 @@
+export const docsLocale = [
+  "ar",
+  "bs",
+  "da",
+  "de",
+  "es",
+  "fr",
+  "it",
+  "ja",
+  "ko",
+  "nb",
+  "pl",
+  "pt-br",
+  "ru",
+  "th",
+  "tr",
+  "zh-cn",
+  "zh-tw",
+] as const
+
+export type DocsLocale = (typeof docsLocale)[number]
+
+export const locale = ["root", ...docsLocale] as const
+
+export type Locale = (typeof locale)[number]
+
+export const localeAlias = {
+  ar: "ar",
+  br: "pt-br",
+  bs: "bs",
+  da: "da",
+  de: "de",
+  en: "root",
+  es: "es",
+  fr: "fr",
+  it: "it",
+  ja: "ja",
+  ko: "ko",
+  nb: "nb",
+  nn: "nb",
+  no: "nb",
+  pl: "pl",
+  pt: "pt-br",
+  "pt-br": "pt-br",
+  root: "root",
+  ru: "ru",
+  th: "th",
+  tr: "tr",
+  zh: "zh-cn",
+  "zh-cn": "zh-cn",
+  zht: "zh-tw",
+  "zh-tw": "zh-tw",
+} as const satisfies Record<string, Locale>
+
+const starts = [
+  ["ko", "ko"],
+  ["bs", "bs"],
+  ["de", "de"],
+  ["es", "es"],
+  ["fr", "fr"],
+  ["it", "it"],
+  ["da", "da"],
+  ["ja", "ja"],
+  ["pl", "pl"],
+  ["ru", "ru"],
+  ["ar", "ar"],
+  ["th", "th"],
+  ["tr", "tr"],
+  ["en", "root"],
+] as const
+
+export function matchLocale(input: string) {
+  let decoded = ""
+  try {
+    decoded = decodeURIComponent(input)
+  } catch {
+    return null
+  }
+
+  const value = decoded.trim().toLowerCase()
+  if (!value) return null
+
+  if (value.startsWith("zh")) {
+    if (value.includes("hant") || value.includes("-tw") || value.includes("-hk") || value.includes("-mo")) {
+      return "zh-tw"
+    }
+    return "zh-cn"
+  }
+
+  if (value in localeAlias) {
+    return localeAlias[value as keyof typeof localeAlias]
+  }
+
+  if (value.startsWith("pt")) return "pt-br"
+  if (value.startsWith("no") || value.startsWith("nb") || value.startsWith("nn")) return "nb"
+
+  return starts.find((item) => value.startsWith(item[0]))?.[1] ?? null
+}