50 lines
1.4 KiB
Dart
50 lines
1.4 KiB
Dart
import 'package:shared_preferences/shared_preferences.dart';
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enum ConnectionMode { tun, proxy }
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abstract final class ConnectionSettings {
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ConnectionSettings._();
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static const String _modeKey = 'connection_mode';
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static ConnectionMode _mode = ConnectionMode.tun;
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static bool _initialized = false;
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static ConnectionMode get mode => _mode;
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static Future<void> initialize() async {
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if (_initialized) return;
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final prefs = await SharedPreferences.getInstance();
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final storedMode = prefs.getString(_modeKey);
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// Only the explicit current proxy value restores SOCKS5. Unknown and
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// obsolete values, including the former 'auto'/'ass' labels, fail closed
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// to full-tunnel TUN instead of silently selecting a weaker route.
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_mode = storedMode == ConnectionMode.proxy.name
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? ConnectionMode.proxy
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: ConnectionMode.tun;
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if (storedMode != _mode.name) {
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final migrated = await prefs.setString(_modeKey, _mode.name);
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if (!migrated) {
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throw StateError('Could not persist migrated connection mode.');
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}
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}
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_initialized = true;
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}
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static Future<bool> setMode(ConnectionMode mode) async {
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if (_initialized && _mode == mode) return true;
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final prefs = await SharedPreferences.getInstance();
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final saved = await prefs.setString(_modeKey, mode.name);
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if (!saved) return false;
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_mode = mode;
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_initialized = true;
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return true;
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}
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}
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