baron-sso/userfront/lib/i18n.dart

import 'dart:ui';

import 'i18n_data.dart';

const _defaultLocale = 'ko';
const _supportedLocales = ['ko', 'en'];

String _resolveLocale() {
  final locale = PlatformDispatcher.instance.locale;
  final code = locale.languageCode.toLowerCase();
  if (_supportedLocales.contains(code)) {
    return code;
  }
  return _defaultLocale;
}

String _formatTemplate(String template, Map<String, String>? params) {
  if (params == null || params.isEmpty) {
    return template;
  }
  var result = template;
  params.forEach((key, value) {
    result = result.replaceAll('{{$key}}', value);
  });
  return result;
}

String tr(String key, {String? fallback, Map<String, String>? params}) {
  final locale = _resolveLocale();
  final map = locale == 'en' ? enStrings : koStrings;
  final value = map[key];
  final template = (value != null && value.isNotEmpty)
      ? value
      : (fallback ?? key);
  return _formatTemplate(template, params);
}