forked from baron/baron-sso
100 lines
2.7 KiB
Dart
100 lines
2.7 KiB
Dart
import 'package:flutter/foundation.dart';
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import 'package:flutter/services.dart';
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const _translationAssetPrefix = 'assets/translations/';
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const _templateFileName = 'template.toml';
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const _safeFallbackLocaleCode = 'en';
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List<String> extractSupportedLocaleCodesFromAssets(Iterable<String> assets) {
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final localeCodes = <String>{};
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for (final asset in assets) {
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if (!asset.startsWith(_translationAssetPrefix) ||
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!asset.endsWith('.toml')) {
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continue;
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}
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final fileName = asset.substring(_translationAssetPrefix.length);
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if (fileName.contains('/') || fileName == _templateFileName) {
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continue;
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}
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final rawCode = fileName.substring(0, fileName.length - '.toml'.length);
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final normalized = rawCode.toLowerCase().replaceAll('_', '-');
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if (_isValidLocaleCode(normalized)) {
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localeCodes.add(normalized);
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}
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}
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final sorted = localeCodes.toList()..sort();
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return sorted;
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}
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class LocaleRegistry {
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static final Set<String> _localeCodes = <String>{};
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static bool _initialized = false;
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static Future<void> initialize({AssetBundle? assetBundle}) async {
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if (_initialized) {
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return;
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}
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final bundle = assetBundle ?? rootBundle;
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try {
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final manifest = await AssetManifest.loadFromAssetBundle(bundle);
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final extracted = extractSupportedLocaleCodesFromAssets(
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manifest.listAssets(),
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);
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_localeCodes.addAll(extracted);
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} catch (_) {
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// manifest 로딩 실패 시 안전 fallback으로 계속 진행합니다.
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}
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if (_localeCodes.isEmpty) {
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_localeCodes.add(_safeFallbackLocaleCode);
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}
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_initialized = true;
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}
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static List<String> get supportedLocaleCodes {
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final sorted = _localeCodes.toList()..sort();
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return List.unmodifiable(sorted);
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}
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static String get fallbackLocaleCode {
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final supported = supportedLocaleCodes;
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if (supported.isEmpty) {
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return _safeFallbackLocaleCode;
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}
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if (supported.contains('en')) {
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return 'en';
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}
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return supported.first;
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}
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static bool contains(String code) {
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return _localeCodes.contains(code.toLowerCase());
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}
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@visibleForTesting
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static void setSupportedLocaleCodesForTest(Iterable<String> localeCodes) {
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_localeCodes
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..clear()
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..addAll(
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localeCodes
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.map((code) => code.toLowerCase().replaceAll('_', '-'))
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.where(_isValidLocaleCode),
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);
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if (_localeCodes.isEmpty) {
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_localeCodes.add(_safeFallbackLocaleCode);
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}
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_initialized = true;
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}
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@visibleForTesting
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static void resetForTest() {
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_localeCodes.clear();
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_initialized = false;
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}
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}
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bool _isValidLocaleCode(String value) {
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return RegExp(r'^[a-z]{2,3}$').hasMatch(value);
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}
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