인프런 커뮤니티 질문&답변

안녕하세요.

기회가 되신다면 코드 전체를 riverpod 버전으로 변경해서 notion 에 올려주실 수 있으실까요?

riverpod 버전으로 변경해보면서 Dart 문법에 대해 더 이해하게 되는 거 같습니다.

코드변환 질문1

class LangService with ChangeNotifier {
  /// 현재 언어
  Locale locale;

  LangService({
    Locale? locale,
  }) : locale = locale ?? IntlHelper.en;

  /// 언어 변경
  void toggleLang() {
    locale = IntlHelper.isKo ? IntlHelper.en : IntlHelper.ko;
    notifyListeners();
  }
}

위 코드를

final langProvider = NotifierProvider<LangNotifier, Locale?> (LangNotifier.new);

class LangNotifier extends Notifier<Locale?> {
  @override
  Locale? build() => IntlHelper.en;

  /// 언어 변경
  void toggleLang() {
    state = IntlHelper.isKo ? IntlHelper.en : IntlHelper.ko;
  }

}

로 변경하면 맞나요?

Notifier<Locale> 로 해야 하는지?

Notifier<Locale?> 로 해야 하는지요?

코드변환 질문2

class ThemeService with ChangeNotifier {
  ThemeService({
    AppTheme? theme,
  }) : theme = theme ?? LightTheme();

  /// 현재 테마
  AppTheme theme;

  /// 테마 변경
  void toggleTheme() {
    if (theme.brightness == Brightness.light) {
      theme = DarkTheme();
    } else {
      theme = LightTheme();
    }
    notifyListeners();
  }

  /// Material ThemeData 커스텀
  ThemeData get themeData {
    return ThemeData(
      /// Scaffold
      scaffoldBackgroundColor: theme.color.surface,

      /// AppBar
      appBarTheme: AppBarTheme(
        backgroundColor: theme.color.surface,
        elevation: 0,
        centerTitle: false,
        iconTheme: IconThemeData(
          color: theme.color.text,
        ),
        titleTextStyle: theme.typo.headline2.copyWith(
          color: theme.color.text,
        ),
      ),

      /// BottomSheet
      bottomSheetTheme: const BottomSheetThemeData(
        backgroundColor: Colors.transparent,
        constraints: BoxConstraints(
          maxWidth: Breakpoints.bottomSheet,
        ),
      ),
    );
  }
}

extension ThemeServiceExt on BuildContext {
  ThemeService get themeService => watch<ThemeService>();
  AppTheme get theme => themeService.theme;
  AppColor get color => theme.color;
  AppDeco get deco => theme.deco;
  AppTypo get typo => theme.typo;
}

위 코드를

final themeProvider = NotifierProvider<ThemeNotifier, AppTheme>(ThemeNotifier.new);

class ThemeNotifier extends Notifier<AppTheme> {
  @override
  AppTheme build() => LightTheme();

  AppTheme get theme => state;
  AppColor get color => state.color;
  AppDeco get deco => state.deco;
  AppTypo get typo => state.typo;

  /// 테마 변경
  void toggleTheme() {
    if (state.brightness == Brightness.light) {
      state = DarkTheme();
    } else {
      state = LightTheme();
    }
  }

  /// Material ThemeData 커스텀
  ThemeData get themeData {
    return ThemeData(
      /// Scaffold
      scaffoldBackgroundColor: state.color.surface,

      /// AppBar
      appBarTheme: AppBarTheme(
        backgroundColor: state.color.surface,
        elevation: 0,
        centerTitle: false,
        iconTheme: IconThemeData(
          color: state.color.text,
        ),
        titleTextStyle: state.typo.headline2.copyWith(
          color: state.color.text,
        ),
      ),

      /// BottomSheet
      bottomSheetTheme: const BottomSheetThemeData(
        backgroundColor: Colors.transparent,
        constraints: BoxConstraints(
          maxWidth: Breakpoints.bottomSheet,
        ),
      ),
    );
  }

}

로 변경하면 맞는지요?