feat: Implement platform-specific persistence for renderer settings and save games

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

apps/wolf_3d_cli/bin/main.dart

@@ -7,8 +7,6 @@ library;
 import 'dart:io';
 
 import 'package:wolf_3d_cli/cli_game_loop.dart';
-import 'package:wolf_3d_cli/cli_renderer_settings_persistence.dart';
-import 'package:wolf_3d_cli/cli_save_game_persistence.dart';
 import 'package:wolf_3d_dart/wolf_3d_data.dart';
 import 'package:wolf_3d_dart/wolf_3d_data_types.dart';
 import 'package:wolf_3d_dart/wolf_3d_engine.dart';
@@ -64,12 +62,12 @@ void main() async {
     input: CliInput(),
     onGameWon: () => stopAndExit(0),
     onQuit: () => stopAndExit(0),
-    saveGamePersistence: CliSaveGamePersistence(),
+    saveGamePersistence: DefaultSaveGamePersistence(),
   );
 
   engine.init();
 
-  final persistence = CliRendererSettingsPersistence();
+  final persistence = DefaultRendererSettingsPersistence();
   final WolfRendererSettings? saved = await persistence.load();
 
   gameLoop = CliGameLoop(

apps/wolf_3d_cli/lib/cli_renderer_settings_persistence.dart

@@ -12,9 +12,7 @@ import 'package:wolf_3d_dart/wolf_3d_engine.dart';
 class CliRendererSettingsPersistence extends RendererSettingsPersistence
     with JsonRendererSettingsPersistence {
   CliRendererSettingsPersistence({String? filePath})
-    : _filePath =
-          filePath ??
-          '${Platform.environment['HOME'] ?? '.'}/.wolf3d_cli_settings.json';
+    : _filePath = filePath ?? '${_platformConfigDir()}/settings.json';
 
   final String _filePath;
 
@@ -40,3 +38,21 @@ class CliRendererSettingsPersistence extends RendererSettingsPersistence
     }
   }
 }
+
+String _platformConfigDir() {
+  if (Platform.isLinux) {
+    final String xdg = Platform.environment['XDG_CONFIG_HOME'] ?? '';
+    final String home = Platform.environment['HOME'] ?? '.';
+    return xdg.isNotEmpty ? '$xdg/wolf3d' : '$home/.config/wolf3d';
+  }
+  if (Platform.isMacOS) {
+    final String home = Platform.environment['HOME'] ?? '.';
+    return '$home/Library/Application Support/wolf3d';
+  }
+  if (Platform.isWindows) {
+    final String appData = Platform.environment['APPDATA'] ?? '.';
+    return '$appData/wolf3d';
+  }
+  final String home = Platform.environment['HOME'] ?? '.';
+  return '$home/.config/wolf3d';
+}

apps/wolf_3d_cli/lib/cli_save_game_persistence.dart

@@ -12,9 +12,7 @@ import 'package:wolf_3d_dart/wolf_3d_engine.dart';
 /// `SAVEGAM{slot}.{ext}` where `{ext}` follows the active game version.
 class CliSaveGamePersistence implements SaveGamePersistence {
   CliSaveGamePersistence({String? directoryPath})
-    : _directoryPath =
-          directoryPath ??
-          '${Platform.environment['HOME'] ?? '.'}/.wolf3d_saves';
+    : _directoryPath = directoryPath ?? '${_platformConfigDir()}/saves';
 
   final String _directoryPath;
 
@@ -66,3 +64,21 @@ class CliSaveGamePersistence implements SaveGamePersistence {
     return '$_directoryPath/SAVEGAM$normalizedSlot.${version.fileExtension}';
   }
 }
+
+String _platformConfigDir() {
+  if (Platform.isLinux) {
+    final String xdg = Platform.environment['XDG_CONFIG_HOME'] ?? '';
+    final String home = Platform.environment['HOME'] ?? '.';
+    return xdg.isNotEmpty ? '$xdg/wolf3d' : '$home/.config/wolf3d';
+  }
+  if (Platform.isMacOS) {
+    final String home = Platform.environment['HOME'] ?? '.';
+    return '$home/Library/Application Support/wolf3d';
+  }
+  if (Platform.isWindows) {
+    final String appData = Platform.environment['APPDATA'] ?? '.';
+    return '$appData/wolf3d';
+  }
+  final String home = Platform.environment['HOME'] ?? '.';
+  return '$home/.config/wolf3d';
+}

apps/wolf_3d_gui/lib/screens/game_screen.dart

@@ -13,8 +13,6 @@ import 'package:wolf_3d_dart/wolf_3d_renderer.dart';
 import 'package:wolf_3d_flutter/renderer/wolf_3d_ascii_renderer.dart';
 import 'package:wolf_3d_flutter/renderer/wolf_3d_flutter_renderer.dart';
 import 'package:wolf_3d_flutter/renderer/wolf_3d_glsl_renderer.dart';
-import 'package:wolf_3d_flutter/renderer_settings_persistence_flutter.dart';
-import 'package:wolf_3d_flutter/save_game_persistence_flutter.dart';
 import 'package:wolf_3d_flutter/wolf_3d_flutter.dart';
 import 'package:wolf_3d_flutter/wolf_3d_input_flutter.dart';
 import 'package:wolf_3d_gui/screens/debug_tools_screen.dart';
@@ -141,10 +139,10 @@ class GameScreen extends StatefulWidget {
 
 class _GameScreenState extends State<GameScreen> {
   late final WolfEngine _engine;
-  final FlutterRendererSettingsPersistence _persistence =
-      FlutterRendererSettingsPersistence();
-  final FlutterSaveGamePersistence _savePersistence =
-      FlutterSaveGamePersistence();
+  final DefaultRendererSettingsPersistence _persistence =
+      DefaultRendererSettingsPersistence();
+  final DefaultSaveGamePersistence _savePersistence =
+      DefaultSaveGamePersistence();
 
   /// Mirrors [WolfRendererSettings.mode] into the Flutter renderer enum.
   RendererMode _rendererMode = RendererMode.hardware;