cxyz/cxyz-android/lib/services/reader_direction.dart

import 'package:shared_preferences/shared_preferences.dart';

/// Vertical continuous scroll vs horizontal page turns.
enum ReaderMode {
  webtoon,
  paged;

  String get storageValue => this == ReaderMode.paged ? 'paged' : 'webtoon';

  static ReaderMode fromStorage(String? raw) {
    return raw == 'paged' ? ReaderMode.paged : ReaderMode.webtoon;
  }
}

/// Global / per-title paged-reader tap/swipe direction.
enum ReadingDirection {
  ltr,
  rtl;

  String get storageValue => name;

  static ReadingDirection fromStorage(String? raw) {
    return raw == 'rtl' ? ReadingDirection.rtl : ReadingDirection.ltr;
  }
}

class ReaderDirection {
  static const prefKey = 'reader_reading_direction';

  static Future<ReadingDirection> load() async {
    final prefs = await SharedPreferences.getInstance();
    return ReadingDirection.fromStorage(prefs.getString(prefKey));
  }

  static Future<void> save(ReadingDirection direction) async {
    final prefs = await SharedPreferences.getInstance();
    await prefs.setString(prefKey, direction.storageValue);
  }
}