feat(i18n): add localization foundation

2026-05-22 13:29:52 +02:00
parent d85dee6fa8
commit 3f548fd53e
13 changed files with 986 additions and 65 deletions
@@ -0,0 +1,68 @@
+import 'dart:ui';
+
+import 'package:flutter/foundation.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class EstadoIdioma extends ChangeNotifier {
+  EstadoIdioma({SharedPreferences? sharedPreferences})
+    : _sharedPreferences = sharedPreferences {
+    _cargar();
+  }
+
+  static const String _keyLocale = 'idioma_manual_v1';
+
+  final SharedPreferences? _sharedPreferences;
+
+  Locale? _localeSeleccionado;
+
+  Locale? get localeSeleccionado => _localeSeleccionado;
+  bool get usaSistema => _localeSeleccionado == null;
+
+  Future<void> seleccionarSistema() async {
+    _localeSeleccionado = null;
+    notifyListeners();
+    final prefs = await _resolverPrefs();
+    await prefs.remove(_keyLocale);
+  }
+
+  Future<void> seleccionarLocale(Locale locale) async {
+    final tag = _serializarLocale(locale);
+    _localeSeleccionado = locale;
+    notifyListeners();
+    final prefs = await _resolverPrefs();
+    await prefs.setString(_keyLocale, tag);
+  }
+
+  Future<void> _cargar() async {
+    final prefs = await _resolverPrefs();
+    final localeGuardado = prefs.getString(_keyLocale);
+    _localeSeleccionado = _parsearLocale(localeGuardado);
+    notifyListeners();
+  }
+
+  Future<SharedPreferences> _resolverPrefs() async {
+    return _sharedPreferences ?? SharedPreferences.getInstance();
+  }
+
+  Locale? _parsearLocale(String? value) {
+    if (value == null || value.trim().isEmpty) return null;
+    final partes = value.split('_');
+    final languageCode = partes.first;
+    if (languageCode.isEmpty) return null;
+    final countryCode = partes.length > 1 && partes[1].isNotEmpty
+        ? partes[1]
+        : null;
+    return Locale.fromSubtags(
+      languageCode: languageCode,
+      countryCode: countryCode,
+    );
+  }
+
+  String _serializarLocale(Locale locale) {
+    final countryCode = locale.countryCode;
+    if (countryCode == null || countryCode.isEmpty) {
+      return locale.languageCode;
+    }
+    return '${locale.languageCode}_$countryCode';
+  }
+}