.vscode/settings.json

@@ -1,4 +1,8 @@
 {
   "dart.flutterSdkPath": ".fvm/versions/3.29.3",
-  "dart.lineLength": 120
+  "dart.sdkPath": ".fvm/versions/3.29.3",
+  "[dart]": {
+    "editor.rulers": [120],
+    "editor.suggest.insertMode": "insert"
+  }
 }

analysis_options.yaml

@@ -9,6 +9,9 @@
 # packages, and plugins designed to encourage good coding practices.
 include: package:flutter_lints/flutter.yaml
 
+formatter:
+  page_width: 120
+
 linter:
   # The lint rules applied to this project can be customized in the
   # section below to disable rules from the `package:flutter_lints/flutter.yaml`

devtools_options.yaml

@@ -0,0 +1,3 @@
+description: This file stores settings for Dart & Flutter DevTools.
+documentation: https://docs.flutter.dev/tools/devtools/extensions#configure-extension-enablement-states
+extensions:

lib/main/adapter/gateway/installation_api_service.dart

@@ -0,0 +1,7 @@
+import 'dart:typed_data';
+
+import 'package:minecraft_server_installer/main/application/repository/installation_repository.dart';
+
+abstract interface class InstallationApiService {
+  Future<Uint8List> fetchRemoteFile(Uri url, {DownloadProgressCallback? onProgressChanged});
+}

lib/main/adapter/gateway/installation_file_storage.dart

@@ -0,0 +1,5 @@
+import 'dart:typed_data';
+
+abstract interface class InstallationFileStorage {
+  Future<void> saveFile(Uint8List fileBytes, String path);
+}

lib/main/adapter/gateway/installation_repository_impl.dart

@@ -0,0 +1,16 @@
+import 'package:minecraft_server_installer/main/adapter/gateway/installation_api_service.dart';
+import 'package:minecraft_server_installer/main/adapter/gateway/installation_file_storage.dart';
+import 'package:minecraft_server_installer/main/application/repository/installation_repository.dart';
+
+class InstallationRepositoryImpl implements InstallationRepository {
+  final InstallationApiService _apiService;
+  final InstallationFileStorage _fileStorage;
+
+  InstallationRepositoryImpl(this._apiService, this._fileStorage);
+
+  @override
+  Future<void> downloadServerFile(Uri url, String path, {DownloadProgressCallback? onProgressChanged}) async {
+    final fileBytes = await _apiService.fetchRemoteFile(url, onProgressChanged: onProgressChanged);
+    await _fileStorage.saveFile(fileBytes, path);
+  }
+}

lib/main/adapter/presentation/installation_bloc.dart

@@ -0,0 +1,72 @@
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:minecraft_server_installer/main/adapter/presentation/installation_state.dart';
+import 'package:minecraft_server_installer/main/adapter/presentation/progress_view_model.dart';
+import 'package:minecraft_server_installer/main/application/use_case/download_file_use_case.dart';
+import 'package:minecraft_server_installer/main/constants.dart';
+import 'package:minecraft_server_installer/vanilla/adapter/presentation/game_version_view_model.dart';
+import 'package:path/path.dart' as path;
+
+class InstallationBloc extends Bloc<InstallationEvent, InstallationState> {
+  InstallationBloc(DownloadFileUseCase downloadFileUseCase) : super(const InstallationState.empty()) {
+    on<InstallationStartedEvent>((_, emit) async {
+      if (!state.canStartToInstall) {
+        return;
+      }
+
+      final gameVersion = state.gameVersion!;
+      final savePath = state.savePath!;
+
+      emit(state.copyWith(isLocked: true, downloadProgress: const ProgressViewModel.start()));
+
+      await downloadFileUseCase(
+        gameVersion.url,
+        path.join(savePath, Constants.serverFileName),
+        onProgressChanged: (progressValue) => add(_InstallationProgressValueChangedEvent(progressValue)),
+      );
+
+      emit(state.copyWith(isLocked: false, downloadProgress: const ProgressViewModel.complete()));
+    });
+
+    on<_InstallationProgressValueChangedEvent>((event, emit) {
+      ProgressViewModel newProgress;
+
+      if (event.progressValue < 0) {
+        newProgress = state.downloadProgress.copyWith(value: 0.0);
+      } else if (event.progressValue > 1) {
+        newProgress = state.downloadProgress.copyWith(value: 1.0);
+      } else {
+        newProgress = state.downloadProgress.copyWith(value: event.progressValue);
+      }
+
+      emit(state.copyWith(downloadProgress: newProgress));
+    });
+
+    on<InstallationConfigurationUpdatedEvent>((event, emit) {
+      final newState = state.copyWith(
+        gameVersion: event.gameVersion,
+        savePath: event.savePath,
+      );
+      emit(newState);
+    });
+  }
+}
+
+sealed class InstallationEvent {}
+
+class InstallationStartedEvent extends InstallationEvent {}
+
+class _InstallationProgressValueChangedEvent extends InstallationEvent {
+  final double progressValue;
+
+  _InstallationProgressValueChangedEvent(this.progressValue);
+}
+
+class InstallationConfigurationUpdatedEvent extends InstallationEvent {
+  final GameVersionViewModel? gameVersion;
+  final String? savePath;
+
+  InstallationConfigurationUpdatedEvent({
+    this.gameVersion,
+    this.savePath,
+  });
+}

lib/main/adapter/presentation/installation_state.dart

@@ -0,0 +1,52 @@
+import 'package:equatable/equatable.dart';
+import 'package:minecraft_server_installer/main/adapter/presentation/progress_view_model.dart';
+import 'package:minecraft_server_installer/vanilla/adapter/presentation/game_version_view_model.dart';
+
+class InstallationState with EquatableMixin {
+  final GameVersionViewModel? gameVersion;
+  final String? savePath;
+  final ProgressViewModel downloadProgress;
+  final bool isLocked;
+
+  const InstallationState({
+    required this.gameVersion,
+    required this.savePath,
+    required this.downloadProgress,
+    required this.isLocked,
+  });
+
+  const InstallationState.empty()
+      : this(
+          gameVersion: null,
+          savePath: null,
+          downloadProgress: const ProgressViewModel.zero(),
+          isLocked: false,
+        );
+
+  @override
+  List<Object?> get props => [
+        gameVersion,
+        savePath,
+        downloadProgress,
+        isLocked,
+      ];
+
+  InstallationState copyWith({
+    GameVersionViewModel? gameVersion,
+    String? savePath,
+    ProgressViewModel? downloadProgress,
+    bool? isLocked,
+  }) =>
+      InstallationState(
+        gameVersion: gameVersion ?? this.gameVersion,
+        savePath: savePath ?? this.savePath,
+        downloadProgress: downloadProgress ?? this.downloadProgress,
+        isLocked: isLocked ?? this.isLocked,
+      );
+
+  bool get isGameVersionSelected => gameVersion != null;
+
+  bool get isSavePathSelected => savePath != null && savePath!.isNotEmpty;
+
+  bool get canStartToInstall => isGameVersionSelected && isSavePathSelected && !isLocked;
+}

lib/main/adapter/presentation/progress_view_model.dart

@@ -0,0 +1,33 @@
+import 'package:equatable/equatable.dart';
+
+class ProgressViewModel with EquatableMixin {
+  /// The value should between 0.0 and 1.0.
+  final double value;
+  final bool isInProgress;
+
+  const ProgressViewModel({
+    required this.value,
+    required this.isInProgress,
+  });
+
+  const ProgressViewModel.zero() : this(value: 0.0, isInProgress: false);
+
+  const ProgressViewModel.start() : this(value: 0.0, isInProgress: true);
+
+  const ProgressViewModel.complete() : this(value: 1.0, isInProgress: false);
+
+  @override
+  List<Object?> get props => [
+        value,
+        isInProgress,
+      ];
+
+  ProgressViewModel copyWith({
+    double? value,
+    bool? isInProgress,
+  }) =>
+      ProgressViewModel(
+        value: value ?? this.value,
+        isInProgress: isInProgress ?? this.isInProgress,
+      );
+}

lib/main/application/repository/installation_repository.dart

@@ -0,0 +1,5 @@
+typedef DownloadProgressCallback = void Function(double progress);
+
+abstract interface class InstallationRepository {
+  Future<void> downloadServerFile(Uri url, String path, {DownloadProgressCallback? onProgressChanged});
+}

lib/main/application/use_case/download_file_use_case.dart

@@ -0,0 +1,10 @@
+import 'package:minecraft_server_installer/main/application/repository/installation_repository.dart';
+
+class DownloadFileUseCase {
+  final InstallationRepository _installationRepository;
+
+  DownloadFileUseCase(this._installationRepository);
+
+  Future<void> call(Uri url, String path, {DownloadProgressCallback? onProgressChanged}) =>
+      _installationRepository.downloadServerFile(url, path, onProgressChanged: onProgressChanged);
+}

lib/main/framework/api/installation_api_service_impl.dart

@@ -0,0 +1,40 @@
+import 'dart:async';
+import 'dart:typed_data';
+
+import 'package:http/http.dart' as http;
+import 'package:minecraft_server_installer/main/adapter/gateway/installation_api_service.dart';
+import 'package:minecraft_server_installer/main/application/repository/installation_repository.dart';
+
+class InstallationApiServiceImpl implements InstallationApiService {
+  @override
+  Future<Uint8List> fetchRemoteFile(Uri url, {DownloadProgressCallback? onProgressChanged}) async {
+    final client = http.Client();
+    final request = http.Request('GET', url);
+    final response = await client.send(request);
+
+    final contentLength = response.contentLength;
+    final completer = Completer<Uint8List>();
+    final bytes = <int>[];
+    var receivedBytes = 0;
+
+    response.stream.listen(
+      (chunk) {
+        bytes.addAll(chunk);
+        receivedBytes += chunk.length;
+        if (onProgressChanged != null && contentLength != null) {
+          onProgressChanged(receivedBytes / contentLength);
+        }
+      },
+      onDone: () {
+        if (onProgressChanged != null) {
+          onProgressChanged(1);
+        }
+        completer.complete(Uint8List.fromList(bytes));
+      },
+      onError: completer.completeError,
+      cancelOnError: true,
+    );
+
+    return completer.future;
+  }
+}

lib/main/framework/storage/installation_file_storage_impl.dart

@@ -0,0 +1,18 @@
+import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:minecraft_server_installer/main/adapter/gateway/installation_file_storage.dart';
+
+class InstallationFileStorageImpl implements InstallationFileStorage {
+  @override
+  Future<void> saveFile(Uint8List fileBytes, String path) async {
+    final file = File(path);
+
+    if (!await file.parent.exists()) {
+      await file.parent.create(recursive: true);
+    }
+
+    await file.create();
+    await file.writeAsBytes(fileBytes, flush: true);
+  }
+}

lib/main/framework/ui/basic_configuration_tab.dart

@@ -1,10 +1,11 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:gap/gap.dart';
+import 'package:minecraft_server_installer/main/adapter/presentation/installation_bloc.dart';
+import 'package:minecraft_server_installer/main/adapter/presentation/installation_state.dart';
+import 'package:minecraft_server_installer/main/framework/ui/path_browsing_field.dart';
 import 'package:minecraft_server_installer/main/framework/ui/strings.dart';
-import 'package:minecraft_server_installer/vanilla/adapter/presentation/vanilla_bloc.dart';
 import 'package:minecraft_server_installer/vanilla/adapter/presentation/game_version_view_model.dart';
-import 'package:minecraft_server_installer/vanilla/adapter/presentation/vanilla_state.dart';
 import 'package:minecraft_server_installer/vanilla/framework/ui/game_version_dropdown.dart';
 
 class BasicConfigurationTab extends StatefulWidget {
@@ -18,38 +19,38 @@ class _BasicConfigurationTabState extends State<BasicConfigurationTab> {
   GameVersionViewModel? selectedGameVersion;
 
   @override
-  Widget build(BuildContext context) {
-    return Column(
-      children: [
-        const GameVersionDropdown(),
-        const Spacer(),
-        BlocConsumer<VanillaBloc, VanillaState>(
-          listener: (_, __) {},
-          builder:
-              (context, state) => Row(
-                mainAxisAlignment: MainAxisAlignment.end,
-                children: [
-                  if (state.isDownloading) Expanded(child: LinearProgressIndicator(value: state.downloadProgress)),
-                  const Gap(32),
-                  ElevatedButton.icon(
-                    style: ElevatedButton.styleFrom(
-                      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
-                    ),
-                    onPressed: state.isGameVersionSelected ? _downloadServerFile : null,
-                    icon: const Icon(Icons.download),
-                    label: const Padding(
-                      padding: EdgeInsets.symmetric(vertical: 12),
-                      child: Text(Strings.buttonStartToInstall),
-                    ),
-                  ),
-                ],
+  Widget build(BuildContext context) => Column(
+        children: [
+          const GameVersionDropdown(),
+          const Gap(16),
+          const PathBrowsingField(),
+          const Spacer(),
+          _bottomControl,
+        ],
+      );
+
+  Widget get _bottomControl => BlocConsumer<InstallationBloc, InstallationState>(
+        listener: (_, __) {},
+        builder: (_, state) => Row(
+          mainAxisAlignment: MainAxisAlignment.end,
+          children: [
+            if (state.downloadProgress.isInProgress)
+              Expanded(child: LinearProgressIndicator(value: state.downloadProgress.value)),
+            const Gap(32),
+            ElevatedButton.icon(
+              style: ElevatedButton.styleFrom(shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(4))),
+              onPressed: context.watch<InstallationBloc>().state.canStartToInstall ? _downloadServerFile : null,
+              icon: const Icon(Icons.download),
+              label: const Padding(
+                padding: EdgeInsets.symmetric(vertical: 12),
+                child: Text(Strings.buttonStartToInstall),
               ),
+            ),
+          ],
         ),
-      ],
-    );
-  }
+      );
 
   void _downloadServerFile() {
-    context.read<VanillaBloc>().add(VanillaServerFileDownloadedEvent());
+    context.read<InstallationBloc>().add((InstallationStartedEvent()));
   }
 }

lib/main/framework/ui/minecraft_server_installer.dart

@@ -1,13 +1,16 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:minecraft_server_installer/main/adapter/gateway/installation_repository_impl.dart';
+import 'package:minecraft_server_installer/main/adapter/presentation/installation_bloc.dart';
+import 'package:minecraft_server_installer/main/adapter/presentation/installation_state.dart';
+import 'package:minecraft_server_installer/main/application/use_case/download_file_use_case.dart';
+import 'package:minecraft_server_installer/main/framework/api/installation_api_service_impl.dart';
+import 'package:minecraft_server_installer/main/framework/storage/installation_file_storage_impl.dart';
 import 'package:minecraft_server_installer/main/framework/ui/basic_configuration_tab.dart';
 import 'package:minecraft_server_installer/vanilla/adapter/gateway/vanilla_repository_impl.dart';
 import 'package:minecraft_server_installer/vanilla/adapter/presentation/vanilla_bloc.dart';
-import 'package:minecraft_server_installer/vanilla/adapter/presentation/vanilla_state.dart';
-import 'package:minecraft_server_installer/vanilla/application/use_case/download_server_file_use_case.dart';
 import 'package:minecraft_server_installer/vanilla/application/use_case/get_game_version_list_use_case.dart';
 import 'package:minecraft_server_installer/vanilla/framework/api/vanilla_api_service_impl.dart';
-import 'package:minecraft_server_installer/vanilla/framework/storage/vanilla_file_storage_impl.dart';
 
 class MinecraftServerInstaller extends StatelessWidget {
   const MinecraftServerInstaller({super.key});
@@ -17,26 +20,28 @@ class MinecraftServerInstaller extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final installationApiService = InstallationApiServiceImpl();
+    final installationFileStorage = InstallationFileStorageImpl();
+    final installationRepository = InstallationRepositoryImpl(installationApiService, installationFileStorage);
+
     final gameVersionApiService = VanillaApiServiceImpl();
-    final gameVersionFileStorage = VanillaFileStorageImpl();
-    final gameVersionRepository = VanillaRepositoryImpl(gameVersionApiService, gameVersionFileStorage);
+    final gameVersionRepository = VanillaRepositoryImpl(gameVersionApiService);
+
+    final downloadFileUseCase = DownloadFileUseCase(installationRepository);
     final getGameVersionListUseCase = GetGameVersionListUseCase(gameVersionRepository);
-    final downloadServerFileUseCase = DownloadServerFileUseCase(gameVersionRepository);
 
     return MaterialApp(
       title: 'Minecraft Server Installer',
       theme: ThemeData.light().copyWith(colorScheme: ColorScheme.fromSeed(seedColor: Colors.blue.shade900)),
       home: MultiBlocProvider(
         providers: [
+          BlocProvider(create: (_) => InstallationBloc(downloadFileUseCase)),
           BlocProvider<VanillaBloc>(
-            create:
-                (context) =>
-                    VanillaBloc(getGameVersionListUseCase, downloadServerFileUseCase)
-                      ..add(VanillaGameVersionListLoadedEvent()),
+            create: (_) => VanillaBloc(getGameVersionListUseCase)..add(VanillaGameVersionListLoadedEvent()),
           ),
         ],
         child: Scaffold(
-          body: BlocConsumer<VanillaBloc, VanillaState>(
+          body: BlocConsumer<InstallationBloc, InstallationState>(
             listener: (_, __) {},
             builder: (_, state) {
               if (state.isLocked) {

lib/main/framework/ui/path_browsing_field.dart

@@ -0,0 +1,75 @@
+import 'package:file_picker/file_picker.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:gap/gap.dart';
+import 'package:minecraft_server_installer/main/adapter/presentation/installation_bloc.dart';
+import 'package:minecraft_server_installer/main/adapter/presentation/installation_state.dart';
+import 'package:minecraft_server_installer/main/framework/ui/strings.dart';
+
+class PathBrowsingField extends StatefulWidget {
+  const PathBrowsingField({super.key});
+
+  @override
+  State<PathBrowsingField> createState() => _PathBrowsingFieldState();
+}
+
+class _PathBrowsingFieldState extends State<PathBrowsingField> {
+  final _textEditingController = TextEditingController();
+
+  @override
+  void initState() {
+    super.initState();
+
+    _textEditingController.text = context.read<InstallationBloc>().state.savePath ?? '';
+  }
+
+  @override
+  Widget build(BuildContext context) => BlocConsumer<InstallationBloc, InstallationState>(
+        listener: (_, state) {
+          if (state.savePath != null) {
+            _textEditingController.text = state.savePath!;
+          }
+        },
+        builder: (_, __) => Row(
+          children: [
+            Expanded(
+              child: TextField(
+                controller: _textEditingController,
+                readOnly: true,
+                canRequestFocus: false,
+                decoration: InputDecoration(
+                  border: OutlineInputBorder(borderRadius: BorderRadius.circular(4)),
+                  label: const Text('${Strings.fieldPath} *'),
+                ),
+              ),
+            ),
+            const Gap(8),
+            SizedBox(
+              height: 48,
+              child: OutlinedButton(
+                onPressed: _browseDirectory,
+                style: OutlinedButton.styleFrom(
+                  shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(4)),
+                ),
+                child: const Text(Strings.buttonBrowse),
+              ),
+            ),
+          ],
+        ),
+      );
+
+  Future<void> _browseDirectory() async {
+    final directory = await FilePicker.platform.getDirectoryPath(
+      dialogTitle: Strings.dialogTitleSelectDirectory,
+      initialDirectory: _textEditingController.text.isNotEmpty ? _textEditingController.text : null,
+    );
+
+    if (!mounted || directory == null) {
+      return;
+    }
+
+    context.read<InstallationBloc>().add(InstallationConfigurationUpdatedEvent(
+          savePath: directory,
+        ));
+  }
+}

lib/main/framework/ui/strings.dart

@@ -1,4 +1,7 @@
 abstract class Strings {
   static const fieldGameVersion = '遊戲版本';
+  static const fieldPath = '安裝路徑';
   static const buttonStartToInstall = '開始安裝';
+  static const buttonBrowse = '瀏覽';
+  static const dialogTitleSelectDirectory = '選擇安裝目錄';
 }

lib/vanilla/adapter/gateway/vanilla_api_service.dart

@@ -1,10 +1,5 @@
-import 'dart:typed_data';
-
-import 'package:minecraft_server_installer/vanilla/application/use_case/download_server_file_use_case.dart';
 import 'package:minecraft_server_installer/vanilla/domain/entity/game_version.dart';
 
 abstract interface class VanillaApiService {
   Future<List<GameVersion>> fetchGameVersionList();
-
-  Future<Uint8List> fetchServerFile(Uri url, {DownloadProgressCallback? onProgressChanged});
 }

lib/vanilla/adapter/gateway/vanilla_file_storage.dart

@@ -1,5 +0,0 @@
-import 'dart:typed_data';
-
-abstract interface class VanillaFileStorage {
-  Future<void> saveFile(Uint8List fileBytes, String savePath);
-}

lib/vanilla/adapter/gateway/vanilla_repository_impl.dart

@@ -1,25 +1,12 @@
 import 'package:minecraft_server_installer/vanilla/adapter/gateway/vanilla_api_service.dart';
-import 'package:minecraft_server_installer/vanilla/adapter/gateway/vanilla_file_storage.dart';
 import 'package:minecraft_server_installer/vanilla/application/repository/vanilla_repository.dart';
-import 'package:minecraft_server_installer/vanilla/application/use_case/download_server_file_use_case.dart';
 import 'package:minecraft_server_installer/vanilla/domain/entity/game_version.dart';
 
 class VanillaRepositoryImpl implements VanillaRepository {
   final VanillaApiService _gameVersionApiService;
-  final VanillaFileStorage _gameVersionFileStorage;
 
-  VanillaRepositoryImpl(this._gameVersionApiService, this._gameVersionFileStorage);
+  VanillaRepositoryImpl(this._gameVersionApiService);
 
   @override
   Future<List<GameVersion>> getGameVersionList() => _gameVersionApiService.fetchGameVersionList();
-
-  @override
-  Future<void> downloadServerFile(
-    GameVersion version,
-    String savePath, {
-    DownloadProgressCallback? onProgressChanged,
-  }) async {
-    final fileBytes = await _gameVersionApiService.fetchServerFile(version.url, onProgressChanged: onProgressChanged);
-    await _gameVersionFileStorage.saveFile(fileBytes, savePath);
-  }
 }

lib/vanilla/adapter/presentation/game_version_view_model.dart

@@ -5,13 +5,16 @@ class GameVersionViewModel with EquatableMixin {
   final String name;
   final Uri url;
 
-  const GameVersionViewModel({required this.name, required this.url});
+  const GameVersionViewModel({
+    required this.name,
+    required this.url,
+  });
 
-  GameVersionViewModel.from(GameVersion gameVersion) : name = gameVersion.name, url = gameVersion.url;
+  GameVersionViewModel.fromEntity(GameVersion gameVersion)
+      : name = gameVersion.name,
+        url = gameVersion.url;
 
-  GameVersion toEntity() {
-    return GameVersion(name: name, url: url);
-  }
+  GameVersion toEntity() => GameVersion(name: name, url: url);
 
   @override
   List<Object?> get props => [name, url];

lib/vanilla/adapter/presentation/vanilla_bloc.dart

@@ -1,57 +1,22 @@
 import 'package:flutter_bloc/flutter_bloc.dart';
-import 'package:minecraft_server_installer/main/constants.dart';
 import 'package:minecraft_server_installer/vanilla/adapter/presentation/game_version_view_model.dart';
 import 'package:minecraft_server_installer/vanilla/adapter/presentation/vanilla_state.dart';
-import 'package:minecraft_server_installer/vanilla/application/use_case/download_server_file_use_case.dart';
 import 'package:minecraft_server_installer/vanilla/application/use_case/get_game_version_list_use_case.dart';
-import 'package:path/path.dart' as path;
 
 class VanillaBloc extends Bloc<VanillaEvent, VanillaState> {
-  final GetGameVersionListUseCase _getGameVersionListUseCase;
-  final DownloadServerFileUseCase _downloadServerFileUseCase;
-
-  VanillaBloc(this._getGameVersionListUseCase, this._downloadServerFileUseCase) : super(const VanillaState.empty()) {
+  VanillaBloc(GetGameVersionListUseCase getGameVersionListUseCase) : super(const VanillaState.empty()) {
     on<VanillaGameVersionListLoadedEvent>((_, emit) async {
       try {
-        final gameVersions = await _getGameVersionListUseCase();
+        final gameVersions = await getGameVersionListUseCase();
         emit(
           const VanillaState.empty().copyWith(
-            gameVersions: gameVersions.map((entity) => GameVersionViewModel.from(entity)).toList(),
+            gameVersions: gameVersions.map((entity) => GameVersionViewModel.fromEntity(entity)).toList(),
           ),
         );
       } on Exception {
         emit(const VanillaState.empty());
       }
     });
-
-    on<VanillaGameVersionSelectedEvent>((event, emit) {
-      emit(state.copyWith(selectedGameVersion: event.gameVersion));
-    });
-
-    on<VanillaServerFileDownloadedEvent>((_, emit) async {
-      final gameVersion = state.selectedGameVersion;
-      if (gameVersion == null) {
-        return;
-      }
-
-      emit(state.copyWith(isLocked: true));
-      await _downloadServerFileUseCase(
-        gameVersion.toEntity(),
-        path.join('.', Constants.serverFileName),
-        onProgressChanged: (progress) => add(_VanillaDownloadProgressChangedEvent(progress)),
-      );
-      emit(state.copyWith(isLocked: false));
-    });
-
-    on<_VanillaDownloadProgressChangedEvent>((event, emit) {
-      if (event.progress < 0) {
-        emit(state.copyWith(downloadProgress: 0));
-      } else if (event.progress > 1) {
-        emit(state.copyWith(downloadProgress: 1));
-      } else {
-        emit(state.copyWith(downloadProgress: event.progress));
-      }
-    });
   }
 }
 
@@ -64,11 +29,3 @@ class VanillaGameVersionSelectedEvent extends VanillaEvent {
 
   VanillaGameVersionSelectedEvent(this.gameVersion);
 }
-
-class VanillaServerFileDownloadedEvent extends VanillaEvent {}
-
-class _VanillaDownloadProgressChangedEvent extends VanillaEvent {
-  final double progress;
-
-  _VanillaDownloadProgressChangedEvent(this.progress);
-}

lib/vanilla/adapter/presentation/vanilla_state.dart

@@ -2,37 +2,29 @@ import 'package:equatable/equatable.dart';
 import 'package:minecraft_server_installer/vanilla/adapter/presentation/game_version_view_model.dart';
 
 class VanillaState with EquatableMixin {
-  final bool isLocked;
-  final double downloadProgress;
   final List<GameVersionViewModel> gameVersions;
-  final GameVersionViewModel? selectedGameVersion;
 
   const VanillaState({
-    required this.isLocked,
-    required this.downloadProgress,
     required this.gameVersions,
-    required this.selectedGameVersion,
   });
 
   const VanillaState.empty()
-    : this(isLocked: false, downloadProgress: 0, gameVersions: const [], selectedGameVersion: null);
+      : this(
+          gameVersions: const [],
+        );
 
   @override
-  List<Object?> get props => [isLocked, downloadProgress, gameVersions, selectedGameVersion];
-
-  bool get isGameVersionSelected => selectedGameVersion != null;
-
-  bool get isDownloading => downloadProgress > 0 && downloadProgress < 1;
+  List<Object?> get props => [
+        gameVersions,
+      ];
 
   VanillaState copyWith({
     bool? isLocked,
     double? downloadProgress,
     List<GameVersionViewModel>? gameVersions,
     GameVersionViewModel? selectedGameVersion,
-  }) => VanillaState(
-    isLocked: isLocked ?? this.isLocked,
-    downloadProgress: downloadProgress ?? this.downloadProgress,
-    gameVersions: gameVersions ?? this.gameVersions,
-    selectedGameVersion: selectedGameVersion ?? this.selectedGameVersion,
-  );
+  }) =>
+      VanillaState(
+        gameVersions: gameVersions ?? this.gameVersions,
+      );
 }

lib/vanilla/application/repository/vanilla_repository.dart

@@ -1,8 +1,5 @@
-import 'package:minecraft_server_installer/vanilla/application/use_case/download_server_file_use_case.dart';
 import 'package:minecraft_server_installer/vanilla/domain/entity/game_version.dart';
 
 abstract interface class VanillaRepository {
   Future<List<GameVersion>> getGameVersionList();
-
-  Future<void> downloadServerFile(GameVersion version, String savePath, {DownloadProgressCallback? onProgressChanged});
 }

lib/vanilla/application/use_case/download_server_file_use_case.dart

@@ -1,13 +0,0 @@
-import 'package:minecraft_server_installer/vanilla/application/repository/vanilla_repository.dart';
-import 'package:minecraft_server_installer/vanilla/domain/entity/game_version.dart';
-
-typedef DownloadProgressCallback = void Function(double progress);
-
-class DownloadServerFileUseCase {
-  final VanillaRepository _gameVersionRepository;
-
-  DownloadServerFileUseCase(this._gameVersionRepository);
-
-  Future<void> call(GameVersion version, String savePath, {DownloadProgressCallback? onProgressChanged}) =>
-      _gameVersionRepository.downloadServerFile(version, savePath, onProgressChanged: onProgressChanged);
-}

lib/vanilla/domain/entity/game_version.dart

@@ -4,7 +4,10 @@ class GameVersion with EquatableMixin {
   final String name;
   final Uri url;
 
-  const GameVersion({required this.name, required this.url});
+  const GameVersion({
+    required this.name,
+    required this.url,
+  });
 
   @override
   List<Object?> get props => [name, url];

lib/vanilla/framework/api/vanilla_api_service_impl.dart

@@ -1,10 +1,8 @@
 import 'dart:async';
-import 'dart:typed_data';
 
 import 'package:http/http.dart' as http;
 import 'package:minecraft_server_installer/main/constants.dart';
 import 'package:minecraft_server_installer/vanilla/adapter/gateway/vanilla_api_service.dart';
-import 'package:minecraft_server_installer/vanilla/application/use_case/download_server_file_use_case.dart';
 import 'package:minecraft_server_installer/vanilla/domain/entity/game_version.dart';
 
 class VanillaApiServiceImpl implements VanillaApiService {
@@ -22,36 +20,4 @@ class VanillaApiServiceImpl implements VanillaApiService {
 
     return gameVersionList;
   }
-
-  @override
-  Future<Uint8List> fetchServerFile(Uri url, {DownloadProgressCallback? onProgressChanged}) async {
-    final client = http.Client();
-    final request = http.Request('GET', url);
-    final response = await client.send(request);
-
-    final contentLength = response.contentLength;
-    final completer = Completer<Uint8List>();
-    final bytes = <int>[];
-    var receivedBytes = 0;
-
-    response.stream.listen(
-      (chunk) {
-        bytes.addAll(chunk);
-        receivedBytes += chunk.length;
-        if (onProgressChanged != null && contentLength != null) {
-          onProgressChanged(receivedBytes / contentLength);
-        }
-      },
-      onDone: () {
-        if (onProgressChanged != null) {
-          onProgressChanged(1);
-        }
-        completer.complete(Uint8List.fromList(bytes));
-      },
-      onError: completer.completeError,
-      cancelOnError: true,
-    );
-
-    return completer.future;
-  }
 }

lib/vanilla/framework/storage/vanilla_file_storage_impl.dart

@@ -1,18 +0,0 @@
-import 'dart:io';
-import 'dart:typed_data';
-
-import 'package:minecraft_server_installer/vanilla/adapter/gateway/vanilla_file_storage.dart';
-
-class VanillaFileStorageImpl implements VanillaFileStorage {
-  @override
-  Future<void> saveFile(Uint8List fileBytes, String savePath) async {
-    final file = File(savePath);
-
-    if (!await file.parent.exists()) {
-      await file.parent.create(recursive: true);
-    }
-
-    await file.create();
-    await file.writeAsBytes(fileBytes, flush: true);
-  }
-}

lib/vanilla/framework/ui/game_version_dropdown.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:minecraft_server_installer/main/adapter/presentation/installation_bloc.dart';
 import 'package:minecraft_server_installer/main/framework/ui/strings.dart';
 import 'package:minecraft_server_installer/vanilla/adapter/presentation/vanilla_bloc.dart';
 import 'package:minecraft_server_installer/vanilla/adapter/presentation/game_version_view_model.dart';
@@ -10,26 +11,24 @@ class GameVersionDropdown extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) => BlocConsumer<VanillaBloc, VanillaState>(
-    listener: (_, __) {},
-    builder:
-        (_, state) => DropdownMenu(
-          initialSelection: state.selectedGameVersion,
+        listener: (_, __) {},
+        builder: (_, state) => DropdownMenu<GameVersionViewModel>(
+          initialSelection: context.read<InstallationBloc>().state.gameVersion,
           enabled: state.gameVersions.isNotEmpty,
           requestFocusOnTap: false,
           expandedInsets: EdgeInsets.zero,
           label: const Text('${Strings.fieldGameVersion} *'),
           onSelected: (value) {
             if (value != null) {
-              context.read<VanillaBloc>().add(VanillaGameVersionSelectedEvent(value));
+              context.read<InstallationBloc>().add(InstallationConfigurationUpdatedEvent(gameVersion: value));
             }
           },
-          dropdownMenuEntries:
-              state.gameVersions
-                  .map(
-                    (gameVersion) =>
-                        DropdownMenuEntry<GameVersionViewModel>(value: gameVersion, label: gameVersion.name),
-                  )
-                  .toList(),
+          dropdownMenuEntries: state.gameVersions
+              .map((gameVersion) => DropdownMenuEntry<GameVersionViewModel>(
+                    value: gameVersion,
+                    label: gameVersion.name,
+                  ))
+              .toList(),
         ),
-  );
+      );
 }

pubspec.lock

@@ -49,6 +49,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.19.1"
+  cross_file:
+    dependency: transitive
+    description:
+      name: cross_file
+      sha256: "7caf6a750a0c04effbb52a676dce9a4a592e10ad35c34d6d2d0e4811160d5670"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.3.4+2"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -73,6 +81,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.3.2"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      sha256: "289279317b4b16eb2bb7e271abccd4bf84ec9bdcbe999e278a94b804f5630418"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.4"
+  file_picker:
+    dependency: "direct main"
+    description:
+      name: file_picker
+      sha256: ef9908739bdd9c476353d6adff72e88fd00c625f5b959ae23f7567bd5137db0a
+      url: "https://pub.dev"
+    source: hosted
+    version: "10.2.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -94,11 +118,24 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "5.0.0"
+  flutter_plugin_android_lifecycle:
+    dependency: transitive
+    description:
+      name: flutter_plugin_android_lifecycle
+      sha256: f948e346c12f8d5480d2825e03de228d0eb8c3a737e4cdaa122267b89c022b5e
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.28"
   flutter_test:
     dependency: "direct dev"
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_web_plugins:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
   gap:
     dependency: "direct main"
     description:
@@ -344,6 +381,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.1"
+  win32:
+    dependency: transitive
+    description:
+      name: win32
+      sha256: "329edf97fdd893e0f1e3b9e88d6a0e627128cc17cc316a8d67fda8f1451178ba"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.13.0"
   window_manager:
     dependency: "direct main"
     description:
@@ -353,5 +398,5 @@ packages:
     source: hosted
     version: "0.5.0"
 sdks:
-  dart: ">=3.7.2 <4.0.0"
-  flutter: ">=3.18.0-18.0.pre.54"
+  dart: ">=3.7.0 <4.0.0"
+  flutter: ">=3.27.0"

pubspec.yaml

@@ -19,7 +19,7 @@ publish_to: "none" # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.7.2
+  sdk: ">=3.6.0 <4.0.0"
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions
@@ -35,6 +35,7 @@ dependencies:
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.8
   equatable: ^2.0.7
+  file_picker: ^10.2.0
   flutter_bloc: ^9.1.1
   gap: ^3.0.1
   http: ^1.4.0