refactor: added i18n class to manage translation logic & improved code

src/common/I18n.js

@@ -0,0 +1,21 @@
+class I18n {
+  constructor({ locale, translations }) {
+    this.locale = locale;
+    this.translations = translations;
+    this.fallbackLocale = "en";
+  }
+
+  t(str) {
+    if (!this.translations[str]) {
+      throw new Error(`${str} Translation string not found`);
+    }
+
+    if (!this.translations[str][this.locale || this.fallbackLocale]) {
+      throw new Error(`${str} Translation locale not found`);
+    }
+
+    return this.translations[str][this.locale || this.fallbackLocale];
+  }
+}
+
+module.exports = I18n;

src/common/utils.js

@@ -188,6 +188,12 @@ class CustomError extends Error {
   static USER_NOT_FOUND = "USER_NOT_FOUND";
 }
 
+function isLocaleAvailable(locale) {
+  return ["cn", "de", "en", "es", "fr", "it", "ja", "kr", "pt-br"].includes(
+    locale.toLowerCase(),
+  );
+}
+
 module.exports = {
   renderError,
   kFormatter,
@@ -201,6 +207,7 @@ module.exports = {
   getCardColors,
   clampValue,
   wrapTextMultiline,
+  isLocaleAvailable,
   logger,
   CONSTANTS,
   CustomError,