Add Flutter port scaffold for SwitchBot Controller

flutter_app/.gitignore

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+.dart_tool/
+.packages
+build/
+.pub/
+.idea/
+.vscode/
+*.iml

flutter_app/README.md

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+# SwitchBot Controller Flutter
+
+Flutter 版の SwitchBot Controller です。既存の Electron 版と同じ機能を提供することを目的としています。
+
+## セットアップ
+```bash
+cd flutter_app
+flutter pub get
+flutter run
+```
+
+## 機能
+- デバイス一覧表示・絞り込み・詳細のステータス表示
+- デバイスコマンドの送信
+- シーン一覧の取得と実行
+- API トークン/シークレットの保存と検証
+- ポーリング間隔、テーマ、言語の設定
+- 最後に開いていたタブの復元

flutter_app/lib/app_state.dart

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+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import 'models.dart';
+import 'services/switchbot_api.dart';
+
+class AppState extends ChangeNotifier {
+  AppState({required this.api});
+
+  final SwitchBotApi api;
+
+  String _token = '';
+  String _secret = '';
+  int _pollingIntervalSeconds = 10;
+  ThemeMode _themeMode = ThemeMode.system;
+  AppLanguage _language = AppLanguage.japanese;
+  int _lastTabIndex = 0;
+
+  Timer? _pollingTimer;
+
+  List<Device> _devices = [];
+  List<Scene> _scenes = [];
+  bool _isLoading = false;
+  String? _errorMessage;
+
+  String get token => _token;
+  String get secret => _secret;
+  int get pollingIntervalSeconds => _pollingIntervalSeconds;
+  ThemeMode get themeMode => _themeMode;
+  AppLanguage get language => _language;
+  int get lastTabIndex => _lastTabIndex;
+
+  List<Device> get devices => _devices;
+  List<Scene> get scenes => _scenes;
+  bool get isLoading => _isLoading;
+  String? get errorMessage => _errorMessage;
+
+  Future<void> load() async {
+    final prefs = await SharedPreferences.getInstance();
+    _token = prefs.getString('token') ?? '';
+    _secret = prefs.getString('secret') ?? '';
+    _pollingIntervalSeconds = prefs.getInt('pollingIntervalSeconds') ?? 10;
+    _themeMode = ThemeMode.values[prefs.getInt('themeMode') ?? ThemeMode.system.index];
+    _language = AppLanguage.values[prefs.getInt('language') ?? AppLanguage.japanese.index];
+    _lastTabIndex = prefs.getInt('lastTabIndex') ?? 0;
+    notifyListeners();
+
+    _restartPolling();
+  }
+
+  Future<void> saveCredentials(String token, String secret) async {
+    _token = token;
+    _secret = secret;
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setString('token', token);
+    await prefs.setString('secret', secret);
+    notifyListeners();
+  }
+
+  Future<void> clearCredentials() async {
+    _token = '';
+    _secret = '';
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.remove('token');
+    await prefs.remove('secret');
+    notifyListeners();
+  }
+
+  Future<void> setPollingIntervalSeconds(int value) async {
+    _pollingIntervalSeconds = value;
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setInt('pollingIntervalSeconds', value);
+    notifyListeners();
+    _restartPolling();
+  }
+
+  Future<void> setThemeMode(ThemeMode value) async {
+    _themeMode = value;
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setInt('themeMode', value.index);
+    notifyListeners();
+  }
+
+  Future<void> setLanguage(AppLanguage value) async {
+    _language = value;
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setInt('language', value.index);
+    notifyListeners();
+  }
+
+  Future<void> setLastTabIndex(int index) async {
+    _lastTabIndex = index;
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setInt('lastTabIndex', index);
+    notifyListeners();
+  }
+
+  Future<bool> validateCredentials() async {
+    if (_token.isEmpty || _secret.isEmpty) {
+      _errorMessage = '認証情報が未入力です。';
+      notifyListeners();
+      return false;
+    }
+    try {
+      await api.fetchDevices(token: _token, secret: _secret);
+      _errorMessage = null;
+      notifyListeners();
+      return true;
+    } catch (error) {
+      _errorMessage = error.toString();
+      notifyListeners();
+      return false;
+    }
+  }
+
+  Future<void> refreshDevices({bool showLoading = true}) async {
+    if (_token.isEmpty || _secret.isEmpty) {
+      _errorMessage = '認証情報が未入力です。';
+      notifyListeners();
+      return;
+    }
+    if (showLoading) {
+      _isLoading = true;
+      notifyListeners();
+    }
+    try {
+      _devices = await api.fetchDevices(token: _token, secret: _secret);
+      _errorMessage = null;
+    } catch (error) {
+      _errorMessage = error.toString();
+    } finally {
+      _isLoading = false;
+      notifyListeners();
+    }
+  }
+
+  Future<void> refreshScenes({bool showLoading = true}) async {
+    if (_token.isEmpty || _secret.isEmpty) {
+      _errorMessage = '認証情報が未入力です。';
+      notifyListeners();
+      return;
+    }
+    if (showLoading) {
+      _isLoading = true;
+      notifyListeners();
+    }
+    try {
+      _scenes = await api.fetchScenes(token: _token, secret: _secret);
+      _errorMessage = null;
+    } catch (error) {
+      _errorMessage = error.toString();
+    } finally {
+      _isLoading = false;
+      notifyListeners();
+    }
+  }
+
+  Future<DeviceStatus?> fetchDeviceStatus(String deviceId) async {
+    if (_token.isEmpty || _secret.isEmpty) {
+      _errorMessage = '認証情報が未入力です。';
+      notifyListeners();
+      return null;
+    }
+    try {
+      final status = await api.fetchDeviceStatus(
+        token: _token,
+        secret: _secret,
+        deviceId: deviceId,
+      );
+      _errorMessage = null;
+      notifyListeners();
+      return status;
+    } catch (error) {
+      _errorMessage = error.toString();
+      notifyListeners();
+      return null;
+    }
+  }
+
+  Future<bool> executeScene(String sceneId) async {
+    if (_token.isEmpty || _secret.isEmpty) {
+      _errorMessage = '認証情報が未入力です。';
+      notifyListeners();
+      return false;
+    }
+    try {
+      await api.executeScene(token: _token, secret: _secret, sceneId: sceneId);
+      _errorMessage = null;
+      notifyListeners();
+      return true;
+    } catch (error) {
+      _errorMessage = error.toString();
+      notifyListeners();
+      return false;
+    }
+  }
+
+  Future<bool> sendCommand(
+    String deviceId, {
+    required String command,
+    required String commandType,
+    String? parameter,
+  }) async {
+    if (_token.isEmpty || _secret.isEmpty) {
+      _errorMessage = '認証情報が未入力です。';
+      notifyListeners();
+      return false;
+    }
+    try {
+      await api.sendCommand(
+        token: _token,
+        secret: _secret,
+        deviceId: deviceId,
+        command: command,
+        commandType: commandType,
+        parameter: parameter,
+      );
+      _errorMessage = null;
+      notifyListeners();
+      return true;
+    } catch (error) {
+      _errorMessage = error.toString();
+      notifyListeners();
+      return false;
+    }
+  }
+
+  void _restartPolling() {
+    _pollingTimer?.cancel();
+    if (_pollingIntervalSeconds <= 0) {
+      return;
+    }
+    _pollingTimer = Timer.periodic(
+      Duration(seconds: _pollingIntervalSeconds),
+      (_) {
+        refreshDevices(showLoading: false);
+      },
+    );
+  }
+
+  @override
+  void dispose() {
+    _pollingTimer?.cancel();
+    super.dispose();
+  }
+}

flutter_app/lib/l10n.dart

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+import 'models.dart';
+
+class AppStrings {
+  AppStrings(this.language);
+
+  final AppLanguage language;
+
+  String get appTitle => _text('SwitchBot Controller', 'SwitchBot Controller');
+  String get devices => _text('Devices', 'デバイス');
+  String get scenes => _text('Scenes', 'シーン');
+  String get settings => _text('Settings', '設定');
+  String get tokenLabel => _text('Open Token', 'Open Token');
+  String get secretLabel => _text('Secret Key', 'Secret Key');
+  String get validateSave => _text('Validate and Save', '検証して保存');
+  String get clearCredentials => _text('Clear Stored Credentials', '保存済み認証情報を削除');
+  String get pollingInterval => _text('Polling Interval (sec)', 'ポーリング間隔（秒）');
+  String get theme => _text('Theme', 'テーマ');
+  String get language => _text('Language', '言語');
+  String get refresh => _text('Refresh', '更新');
+  String get filter => _text('Filter', '絞り込み');
+  String get status => _text('Status', 'ステータス');
+  String get execute => _text('Execute', '実行');
+  String get command => _text('Command', 'コマンド');
+  String get commandType => _text('Command Type', 'コマンド種別');
+  String get parameter => _text('Parameter', 'パラメータ');
+  String get sendCommand => _text('Send Command', 'コマンド送信');
+  String get updateStatus => _text('Update Status', 'ステータス更新');
+  String get noDevices => _text('No devices available.', 'デバイスがありません。');
+  String get noScenes => _text('No scenes available.', 'シーンがありません。');
+  String get validateSuccess => _text('Validation success.', '検証に成功しました。');
+  String get validateFailure => _text('Validation failed.', '検証に失敗しました。');
+  String get selectThemeSystem => _text('Follow System', 'システムに追従');
+  String get selectThemeLight => _text('Light', 'ライト');
+  String get selectThemeDark => _text('Dark', 'ダーク');
+  String get selectLanguageJapanese => _text('Japanese', '日本語');
+  String get selectLanguageEnglish => _text('English', 'English');
+  String get lastUpdated => _text('Last Updated', '最終更新');
+  String get apiError => _text('API error', 'API エラー');
+
+  String _text(String en, String ja) {
+    return language == AppLanguage.english ? en : ja;
+  }
+}