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apps/website/src/lib/locales.ts

@@ -0,0 +1,25 @@
+export const SUPPORTED_LOCALES = ['th', 'en', 'ja', 'zh', 'vi', 'ko'] as const;
+export type Locale = typeof SUPPORTED_LOCALES[number];
+
+export const DEFAULT_LOCALE: Locale = 'th';
+
+export function isSupportedLocale(locale: string): locale is Locale {
+  return SUPPORTED_LOCALES.includes(locale as Locale);
+}
+
+export function getPathWithoutLocale(path: string): string {
+  const segments = path.split('/').filter(Boolean);
+  if (segments.length > 0 && isSupportedLocale(segments[0])) {
+    segments.shift();
+  }
+  return '/' + segments.join('/');
+}
+
+export function getPathWithLocale(path: string, locale: string): string {
+  if (!path) return `/${locale}`;
+  if (path.startsWith('http')) return path; // Skip absolute external URLs
+  
+  const pathWithoutLocale = getPathWithoutLocale(path);
+  if (pathWithoutLocale === '/') return `/${locale}`;
+  return `/${locale}${pathWithoutLocale}`;
+}