request list + structure

src/locale/index.ts

@@ -0,0 +1,39 @@
+import { fa } from "./fa";
+
+export type LocaleKey = "fa";
+export interface TranslationsType {
+  [key: string]: string | TranslationsType;
+}
+
+const locales: Record<LocaleKey, TranslationsType> = { fa };
+
+let currentLang: LocaleKey = "fa";
+
+export const setLang = (lang: LocaleKey) => {
+  currentLang = lang;
+};
+
+export const getLang = (): LocaleKey => currentLang;
+
+const cache = new Map<string, string>();
+
+export const t = (key: string, fallback?: string): string => {
+  const cacheKey = `${currentLang}:${key}`;
+  if (cache.has(cacheKey)) return cache.get(cacheKey)!;
+
+  const keys = key.split(".");
+  let value: string | TranslationsType | undefined = locales[currentLang];
+
+  for (const k of keys) {
+    if (typeof value === "object" && value !== null) {
+      value = value[k];
+    } else {
+      value = undefined;
+      break;
+    }
+  }
+
+  const result = typeof value === "string" ? value : fallback || key;
+  cache.set(cacheKey, result);
+  return result;
+};