feat: add waline i18n & sync comments

src/utils/ui.ts

@@ -7,6 +7,18 @@ export const langMap: Record<string, string[]> = {
   'es': ['es-ES'],
   'ru': ['ru-RU'],
 }
+
+// Waline Language Map
+// see more at https://waline.js.org/guide/i18n.html
+export const walineLocaleMap: Record<string, string> = {
+  'zh': 'zh-CN',
+  'zh-tw': 'zh-TW',
+  'ja': 'jp-JP', // Waline uses jp-JP not ja-JP
+  'en': 'en-US',
+  'es': 'es-ES',
+  'ru': 'ru-RU',
+}
+
 // Standard Language Code
 export const langCode = Object.values(langMap).flat()
 // Abbreviated Language Code
@@ -44,3 +56,19 @@ export const ui = {
     about: 'О себе',
   },
 }
+
+/**
+ * Get the language code of Waline
+ * @param currentPath Current page path
+ * @param defaultLocale Default language
+ * @returns Corresponding Waline language code
+ */
+export function getWalineLang(currentPath: string, defaultLocale: string): string {
+  // Extract language code from path
+  const pathLang = Object.keys(walineLocaleMap).find(code =>
+    currentPath.startsWith(`/${code}/`),
+  )
+  // Return found path language or default language
+  const lang = pathLang || defaultLocale
+  return walineLocaleMap[lang as keyof typeof walineLocaleMap]
+}