parse filenames

lib/screens/home.dart

@@ -2,7 +2,9 @@ import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
+import 'package:path/path.dart' as path;
 import 'package:taglib_ffi/taglib_ffi.dart';
+import 'package:tuple_dart/tuple_dart.dart';
 import 'package:window_manager/window_manager.dart';
 
 import '../browser/browser.dart';
@@ -16,6 +18,7 @@ import '../processors/saver.dart';
 import '../processors/scanner.dart';
 import '../utils/events.dart';
 import '../utils/logger.dart';
+import '../utils/track_utils.dart';
 import 'settings.dart';
 import 'transcoder.dart';
 
@@ -302,14 +305,30 @@ class _TraxHomePageState extends State<TraxHomePage>
     if (result == null) return;
 
     // we need to parse them
+    int index = 1;
     TrackList tracks = [];
     TagLib tagLib = TagLib();
     eventBus.fire(BackgroundActionStartEvent(BackgroundAction.import));
     for (String? filepath in result.paths) {
       if (filepath == null) continue;
       Track track = Track.parse(filepath, tagLib);
+      if (track.tags != null) {
+        String filename = path.basenameWithoutExtension(filepath);
+        Tuple2<String, int> parts = TrackUtils.parseTrackFilename(filename);
+        if (track.tags!.title == "") {
+          track.tags!.title = parts.item1;
+        }
+        if (track.tags!.trackIndex == 0) {
+          if (parts.item2 != 0) {
+            track.tags!.trackIndex = parts.item2;
+          } else {
+            track.tags!.trackIndex = index;
+          }
+        }
+      }
       tracks.add(track);
       await Future.delayed(Duration.zero, () {});
+      index++;
     }
     eventBus.fire(BackgroundActionEndEvent(BackgroundAction.import));
 

lib/utils/track_utils.dart

@@ -1,4 +1,7 @@
+import 'dart:math';
+
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
+import 'package:tuple_dart/tuple_dart.dart';
 
 import '../model/track.dart';
 
@@ -10,6 +13,34 @@ extension TrackUtils on Track {
     _t = t;
   }
 
+  static Tuple2<String, int> parseTrackFilename(String filename) {
+    // find a separator
+    var index = -1;
+    var index1 = filename.indexOf('-');
+    var index2 = filename.indexOf('.');
+    if (index1 == -1 && index2 == -1) {
+      return Tuple2(filename, 0);
+    } else if (index1 == -1) {
+      index = index2;
+    } else if (index2 == -1) {
+      index = index1;
+    } else {
+      index = min(index1, index2);
+    }
+
+    // new get prefix and check it is only digits
+    var prefix = filename.substring(0, index).trim();
+    if (prefix.isEmpty) return Tuple2(filename, 0);
+    if (prefix.contains(RegExp(r'[^0-9]'))) return Tuple2(filename, 0);
+
+    // get the rest of the filename
+    var rest = filename.substring(index + 1).trim();
+    if (rest.isEmpty) return Tuple2(filename, 0);
+
+    // return the parts
+    return Tuple2(rest, int.parse(prefix));
+  }
+
   String get displayTitle {
     return getDisplayTitle(safeTags.title);
   }

macos/Podfile.lock

@@ -126,4 +126,4 @@ SPEC CHECKSUMS:
 
 PODFILE CHECKSUM: ec3a267b951cf4ed1540d33015451fed0e200941
 
-COCOAPODS: 1.14.3
+COCOAPODS: 1.15.0

pubspec.lock

@@ -701,6 +701,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.6.1"
+  tuple_dart:
+    dependency: "direct main"
+    description:
+      name: tuple_dart
+      sha256: "0db473430e680e43111ae7d0cf4e1c222f0dc20350378c845b70c4daa4195708"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.2"
   typed_data:
     dependency: transitive
     description:

pubspec.yaml

@@ -43,6 +43,7 @@ dependencies:
   sqflite: ^2.2.6
   taglib_ffi: ^0.1.0
   window_manager: ^0.3.2
+  tuple_dart: ^1.4.2
 
 dev_dependencies:
   flutter_test: