style: refactored searching files into Simfile class

lib/game_over_stats.dart

@@ -50,8 +50,8 @@ class GameOverStats extends StatelessWidget {
             ]),
             TextButton(
                 onPressed: () {
-                  Route route = MaterialPageRoute(
-                      builder: (context) => Level(stepmaniaFolderPath: simfile.directoryPath));
+                  Route route =
+                      MaterialPageRoute(builder: (context) => Level(simfile));
                   Navigator.pushReplacement(context, route);
                 },
                 child: Text('Retry'))

lib/level.dart

@@ -9,8 +9,8 @@ import 'package:sense_the_rhythm/game_over_stats.dart';
 import 'package:sense_the_rhythm/simfile.dart';
 
 class Level extends StatefulWidget {
-  const Level({super.key, required this.stepmaniaFolderPath});
-  final String stepmaniaFolderPath;
+  const Level(this.simfile, {super.key});
+  final Simfile simfile;
 
   @override
   State<Level> createState() => _LevelState();
@@ -25,7 +25,6 @@ class InputDirection {
 
 class _LevelState extends State<Level> {
   final player = AudioPlayer();
-  Simfile? simfile;
   bool _isPlaying = true;
   Duration? _duration;
   Duration? _position;
@@ -77,7 +76,7 @@ class _LevelState extends State<Level> {
     player.onPlayerComplete.listen((void _) {
       Route route = MaterialPageRoute(
           builder: (context) => GameOverStats(
-                simfile: simfile!,
+                simfile: widget.simfile,
                 notes: notes,
               ));
       Navigator.pushReplacement(context, route);
@@ -131,10 +130,7 @@ class _LevelState extends State<Level> {
       }
     });
 
-    simfile = Simfile(widget.stepmaniaFolderPath);
-    simfile!.load();
-
-    simfile!.chartSimplest!.beats.forEach((time, noteData) {
+    widget.simfile.chartSimplest!.beats.forEach((time, noteData) {
       int arrowIndex = noteData.indexOf('1');
       if (arrowIndex < 0 || arrowIndex > 3) {
         return;
@@ -142,7 +138,7 @@ class _LevelState extends State<Level> {
       notes.add(Note(time: time, direction: ArrowDirection.values[arrowIndex]));
     });
 
-    player.play(DeviceFileSource(simfile!.audioPath!));
+    player.play(DeviceFileSource(widget.simfile.audioPath!));
   }
 
   @override
@@ -192,7 +188,7 @@ class _LevelState extends State<Level> {
                 }
               },
             ),
-            title: Text(widget.stepmaniaFolderPath.split('/').last),
+            title: Text(widget.simfile.tags['TITLE']!),
             actions: [
               IconButton(
                   icon: Icon(Icons.close),

lib/level_selection.dart

@@ -5,6 +5,7 @@ import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
 import 'package:permission_handler/permission_handler.dart';
 import 'package:sense_the_rhythm/esense_connect_dialog.dart';
+import 'package:sense_the_rhythm/simfile.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
 import 'level.dart';
@@ -18,7 +19,7 @@ class LevelSelection extends StatefulWidget {
 
 class _LevelSelectionState extends State<LevelSelection> {
   String? stepmaniaCoursesPath;
-  List<FileSystemEntity> stepmaniaCoursesFolders = [];
+  List<Simfile> stepmaniaCoursesFolders = [];
 
   String eSenseDeviceName = '';
   ESenseManager? eSenseManager;
@@ -109,8 +110,9 @@ class _LevelSelectionState extends State<LevelSelection> {
         prefs.getString('stepmania_courses');
 
     if (stepmaniaCoursesPathSetting == null) return;
-    List<FileSystemEntity> stepmaniaCoursesFoldersFuture = await listFilesAndFolders(stepmaniaCoursesPathSetting);
-    
+    List<Simfile> stepmaniaCoursesFoldersFuture =
+        await listFilesAndFolders(stepmaniaCoursesPathSetting);
+
     setState(() {
       stepmaniaCoursesPath = stepmaniaCoursesPathSetting;
       stepmaniaCoursesFolders = stepmaniaCoursesFoldersFuture;
@@ -129,15 +131,18 @@ class _LevelSelectionState extends State<LevelSelection> {
     }
   }
 
-  Future<List<FileSystemEntity>> listFilesAndFolders(
-      String directoryPath) async {
+  Future<List<Simfile>> listFilesAndFolders(String directoryPath) async {
     final directory = Directory(directoryPath);
     try {
       // List all files and folders in the directory
       return directory
           .listSync()
           .where((entity) => FileSystemEntity.isDirectorySync(entity.path))
-          .toList();
+          .map((entity) {
+        Simfile simfile = Simfile(entity.path);
+        simfile.load();
+        return simfile;
+      }).toList();
     } catch (e) {
       print("Error reading directory: $e");
       return [];
@@ -155,10 +160,10 @@ class _LevelSelectionState extends State<LevelSelection> {
                     context: context,
                     builder: (BuildContext context) {
                       return ESenseConnectDialog(
-                        deviceStatus: _deviceStatus,
-                        connect: (String name) {
-                          _connectToESense(name);
-                        });
+                          deviceStatus: _deviceStatus,
+                          connect: (String name) {
+                            _connectToESense(name);
+                          });
                     },
                   ),
               icon: const Icon(Icons.bluetooth))
@@ -176,26 +181,17 @@ class _LevelSelectionState extends State<LevelSelection> {
             separatorBuilder: (BuildContext context, int index) =>
                 const Divider(),
             itemBuilder: (context, index) {
-              String thumbnailPath = Directory(
-                      stepmaniaCoursesFolders[index].path)
-                  .listSync()
-                  .firstWhere(
-                      (file) => file.path.toLowerCase().endsWith('banner.png'),
-                      orElse: () => File(''))
-                  .path;
               return ListTile(
-                leading: Image.file(File(thumbnailPath)),
+                leading: Image.file(
+                    File(stepmaniaCoursesFolders[index].bannerPath!)),
                 trailing: Icon(Icons.play_arrow),
-                title:
-                    Text(stepmaniaCoursesFolders[index].path.split('/').last),
+                title: Text(stepmaniaCoursesFolders[index].tags["TITLE"]!),
                 subtitle: Text('3:45'),
                 onTap: () => Navigator.push(
                     context,
                     MaterialPageRoute(
-                        builder: (BuildContext context) => Level(
-                              stepmaniaFolderPath:
-                                  stepmaniaCoursesFolders[index].path,
-                            ))),
+                        builder: (BuildContext context) =>
+                            Level(stepmaniaCoursesFolders[index]))),
               );
             },
           );

lib/simfile.dart

@@ -124,7 +124,8 @@ class Simfile {
     simfilePath = Directory(directoryPath)
         .listSync()
         .firstWhere((entity) => entity.path.endsWith('.sm'),
-            orElse: () => File('')).path;
+            orElse: () => File(''))
+        .path;
 
     audioPath = Directory(directoryPath)
         .listSync()
@@ -132,6 +133,12 @@ class Simfile {
             orElse: () => File(''))
         .path;
 
+    bannerPath = Directory(directoryPath)
+        .listSync()
+        .firstWhere((file) => file.path.toLowerCase().endsWith('banner.png'),
+            orElse: () => File(''))
+        .path;
+
     lines = File(simfilePath!).readAsStringSync();
 
     RegExp commentsRegExp = RegExp(r'//.*$');