feat: allow user to adjust font size on reader screen

lib/bloc/screen/reader/reader_screen_bloc.dart

@@ -3,6 +3,7 @@ import 'package:isar/isar.dart';
 import 'package:masiro/bloc/screen/reader/reader_screen_event.dart';
 import 'package:masiro/bloc/screen/reader/reader_screen_state.dart';
 import 'package:masiro/bloc/util/event_transformer.dart';
+import 'package:masiro/data/repository/app_configuration_repository.dart';
 import 'package:masiro/data/repository/masiro_repository.dart';
 import 'package:masiro/data/repository/model/chapter_detail.dart';
 import 'package:masiro/data/repository/model/chapter_record.dart';
@@ -15,6 +16,7 @@ import 'package:masiro/di/get_it.dart';
 class ReaderScreenBloc extends Bloc<ReaderScreenEvent, ReaderScreenState> {
   final masiroRepository = getIt<MasiroRepository>();
   final novelRecordRepository = getIt<NovelRecordRepository>();
+  final appConfigurationRepository = getIt<AppConfigurationRepository>();
 
   final int novelId;
 
@@ -28,6 +30,7 @@ class ReaderScreenBloc extends Bloc<ReaderScreenEvent, ReaderScreenState> {
       transformer: debounce(const Duration(milliseconds: 500)),
     );
     on<ReaderScreenChapterNavigated>(_onReaderScreenChapterNavigated);
+    on<ReaderScreenFontSizeChanged>(_onReaderScreenFontSizeChanged);
   }
 
   Future<void> _onRequestReaderScreenChapterDetail(
@@ -44,10 +47,12 @@ class ReaderScreenBloc extends Bloc<ReaderScreenEvent, ReaderScreenState> {
         chapterId,
         ReadingMode.scroll,
       );
+      final appConfig = await appConfigurationRepository.getAppConfiguration();
       emit(
         ReaderScreenLoadedState(
           chapterDetail: chapterDetail,
           position: chapterRecord?.position ?? startPosition,
+          fontSize: appConfig.fontSize,
         ),
       );
     } catch (e) {
@@ -104,6 +109,20 @@ class ReaderScreenBloc extends Bloc<ReaderScreenEvent, ReaderScreenState> {
     add(ReaderScreenChapterDetailRequested(chapterId: event.chapterId));
   }
 
+  Future<void> _onReaderScreenFontSizeChanged(
+    ReaderScreenFontSizeChanged event,
+    Emitter<ReaderScreenState> emit,
+  ) async {
+    if (state is! ReaderScreenLoadedState) {
+      return;
+    }
+    final appConfig = await appConfigurationRepository.getAppConfiguration();
+    final nextAppConfig = appConfig.copyWith(fontSize: event.fontSize);
+    await appConfigurationRepository.putAppConfiguration(nextAppConfig);
+    final loadedState = state as ReaderScreenLoadedState;
+    emit(loadedState.copyWith(fontSize: event.fontSize));
+  }
+
   Future<String> purchasePaidChapter(PaymentInfo paymentInfo) async {
     if (state is! ReaderScreenLoadedState) {
       throw Exception(

lib/bloc/screen/reader/reader_screen_event.dart

@@ -34,3 +34,12 @@ final class ReaderScreenChapterNavigated extends ReaderScreenEvent {
   @override
   List<Object> get props => [chapterId];
 }
+
+final class ReaderScreenFontSizeChanged extends ReaderScreenEvent {
+  final int fontSize;
+
+  ReaderScreenFontSizeChanged({required this.fontSize});
+
+  @override
+  List<Object> get props => [fontSize];
+}

lib/bloc/screen/reader/reader_screen_state.dart

@@ -26,13 +26,15 @@ class ReaderScreenLoadedState extends ReaderScreenState {
   final ReadingMode readingMode;
   final ReadPosition position;
   final LoadingStatus loadingStatus;
+  final int fontSize;
 
   ReaderScreenLoadedState({
     required this.chapterDetail,
     this.isHudVisible = false,
     this.readingMode = ReadingMode.scroll,
     required this.position,
     this.loadingStatus = LoadingStatus.success,
+    required this.fontSize,
   });
 
   ReaderScreenLoadedState copyWith({
@@ -41,13 +43,15 @@ class ReaderScreenLoadedState extends ReaderScreenState {
     ReadingMode? readingMode,
     ReadPosition? position,
     LoadingStatus? loadingStatus,
+    int? fontSize,
   }) {
     return ReaderScreenLoadedState(
       chapterDetail: chapterDetail ?? this.chapterDetail,
       isHudVisible: isHudVisible ?? this.isHudVisible,
       readingMode: readingMode ?? this.readingMode,
       position: position ?? this.position,
       loadingStatus: loadingStatus ?? this.loadingStatus,
+      fontSize: fontSize ?? this.fontSize,
     );
   }
 
@@ -58,5 +62,6 @@ class ReaderScreenLoadedState extends ReaderScreenState {
         readingMode,
         position,
         loadingStatus,
+        fontSize,
       ];
 }

lib/data/database/entity/app_configuration_entity.dart

@@ -17,12 +17,15 @@ class AppConfigurationEntity {
 
   int themeColor;
 
+  int fontSize;
+
   AppConfigurationEntity({
     this.id = Isar.autoIncrement,
     required this.dbVersion,
     this.lastSignInTime = 0,
     this.themeMode = ThemeMode.system,
     this.themeColor = defaultThemeColor,
+    this.fontSize = defaultFontSize,
   });
 
   AppConfigurationEntity copyWith({
@@ -31,13 +34,15 @@ class AppConfigurationEntity {
     int? lastSignInTime,
     ThemeMode? themeMode,
     int? themeColor,
+    int? fontSize,
   }) {
     return AppConfigurationEntity(
       id: id ?? this.id,
       dbVersion: dbVersion ?? this.dbVersion,
       lastSignInTime: lastSignInTime ?? this.lastSignInTime,
       themeMode: themeMode ?? this.themeMode,
       themeColor: themeColor ?? this.themeColor,
+      fontSize: fontSize ?? this.fontSize,
     );
   }
 }

lib/data/repository/adapter/app_configuration_entity_adapter.dart

@@ -8,6 +8,7 @@ AppConfiguration appConfigurationEntityToModel(AppConfigurationEntity entity) {
     lastSignInTime: entity.lastSignInTime,
     themeMode: entity.themeMode,
     themeColor: entity.themeColor,
+    fontSize: entity.fontSize,
   );
 }
 
@@ -18,5 +19,6 @@ AppConfigurationEntity appConfigurationToEntity(AppConfiguration config) {
     lastSignInTime: config.lastSignInTime,
     themeMode: config.themeMode,
     themeColor: config.themeColor,
+    fontSize: config.fontSize,
   );
 }