feat(client): 主题选择 controller + SharedPreferences 持久化

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-24 21:46:51 +08:00
parent ab34394109
commit f9f7031cd8
2 changed files with 50 additions and 0 deletions
@@ -0,0 +1,25 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+const _kKey = 'app_theme';
+const _kValid = {'a', 'b', 'c'};
+
+class ThemeController extends StateNotifier<String> {
+  ThemeController() : super('a');
+
+  Future<void> restore() async {
+    final prefs = await SharedPreferences.getInstance();
+    final v = prefs.getString(_kKey);
+    if (v != null && _kValid.contains(v)) state = v;
+  }
+
+  Future<void> set(String key) async {
+    if (!_kValid.contains(key)) return;
+    state = key;
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setString(_kKey, key);
+  }
+}
+
+final themeControllerProvider =
+    StateNotifierProvider<ThemeController, String>((ref) => ThemeController());