common: Remove platform interface

common/lib/musicus_common.dart

@@ -1,5 +1,4 @@
 export 'src/app.dart';
 export 'src/library.dart';
-export 'src/platform.dart';
 export 'src/playback.dart';
 export 'src/settings.dart';

common/lib/src/app.dart

@@ -1,12 +1,11 @@
 import 'dart:async';
 
+import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 
 import 'backend.dart';
 import 'screens/home.dart';
 import 'settings.dart';
-import 'platform.dart';
 import 'playback.dart';
 import 'widgets/player_bar.dart';
 
@@ -24,14 +23,10 @@ class MusicusApp extends StatelessWidget {
   /// An object handling playback.
   final MusicusPlayback playback;
 
-  /// An object handling platform dependent functionality.
-  final MusicusPlatform platform;
-
   MusicusApp({
     @required this.dbPath,
     @required this.settingsStorage,
     @required this.playback,
-    @required this.platform,
   });
 
   @override
@@ -39,7 +34,6 @@ class MusicusApp extends StatelessWidget {
     return MusicusBackend(
       settingsStorage: settingsStorage,
       playback: playback,
-      platform: platform,
       child: Builder(
         builder: (context) {
           final backend = MusicusBackend.of(context);
@@ -91,7 +85,7 @@ class MusicusApp extends StatelessWidget {
                           leading: const Icon(Icons.folder_open),
                           title: Text('Choose path'),
                           onTap: () async {
-                            final uri = await platform.chooseBasePath();
+                            final uri = await FilePicker.platform.getDirectoryPath();
                             if (uri != null) {
                               backend.settings.setMusicLibraryPath(uri);
                             }

common/lib/src/backend.dart

@@ -2,7 +2,6 @@ import 'package:flutter/widgets.dart';
 import 'package:musicus_database/musicus_database.dart';
 
 import 'library.dart';
-import 'platform.dart';
 import 'playback.dart';
 import 'settings.dart';
 
@@ -43,9 +42,6 @@ class MusicusBackend extends StatefulWidget {
   /// An object handling playback.
   final MusicusPlayback playback;
 
-  /// An object handling platform dependent functionality.
-  final MusicusPlatform platform;
-
   /// The first child below the backend widget.
   ///
   /// This widget should keep track of the current backend status and block
@@ -56,7 +52,6 @@ class MusicusBackend extends StatefulWidget {
   MusicusBackend({
     @required this.settingsStorage,
     @required this.playback,
-    @required this.platform,
     @required this.child,
   });
 
@@ -76,7 +71,6 @@ class MusicusBackendState extends State<MusicusBackend> {
 
   MusicusPlayback playback;
   MusicusSettings settings;
-  MusicusPlatform platform;
   MusicusLibrary library;
 
   MusicusClientDatabase get db => library.db;
@@ -90,7 +84,6 @@ class MusicusBackendState extends State<MusicusBackend> {
   /// Initialize resources.
   Future<void> _load() async {
     playback = widget.playback;
-    await playback.setup();
 
     settings = MusicusSettings(widget.settingsStorage);
     await settings.load();
@@ -104,9 +97,6 @@ class MusicusBackendState extends State<MusicusBackend> {
 
     final path = settings.musicLibraryPath.valueOrNull;
 
-    platform = widget.platform;
-    platform.setBasePath(path);
-
     // This will change the status for us.
     _updateMusicLibrary(path);
   }
@@ -118,9 +108,11 @@ class MusicusBackendState extends State<MusicusBackend> {
         status = MusicusBackendStatus.setup;
       });
     } else {
-      platform.setBasePath(path);
+      library = MusicusLibrary(path);
-      library = MusicusLibrary(path, platform);
+
       await library.load();
+      await playback.setup(library);
+
       setState(() {
         status = MusicusBackendStatus.ready;
       });

common/lib/src/library.dart

@@ -8,8 +8,6 @@ import 'package:drift/isolate.dart';
 import 'package:drift/native.dart';
 import 'package:musicus_database/musicus_database.dart';
 
-import 'platform.dart';
-
 /// Manager for all available tracks and their representation on disk.
 class MusicusLibrary {
   /// Starts the database isolate.
@@ -19,6 +17,7 @@ class MusicusLibrary {
   static void _dbIsolateEntrypoint(_IsolateStartRequest request) {
     final executor = NativeDatabase(File(request.path));
 
+
     final driftIsolate =
         DriftIsolate.inCurrent(() => DatabaseConnection.fromExecutor(executor));
 
@@ -31,10 +30,7 @@ class MusicusLibrary {
   /// The actual music library database.
   MusicusClientDatabase db;
 
-  /// Access to platform dependent functionality.
+  MusicusLibrary(this.basePath);
-  final MusicusPlatform platform;
-
-  MusicusLibrary(this.basePath, this.platform);
 
   /// Load all available tracks.
   ///

common/lib/src/platform.dart

@@ -1,82 +0,0 @@
-/// Object representing a document in Storage Access Framework terms.
-class Document {
-  /// Unique ID for the document.
-  ///
-  /// The platform implementation thould be able to get the content of the
-  /// document based on this value.
-  final String id;
-
-  /// Name of the document (i.e. file name).
-  final String name;
-
-  /// Document ID of the parent document.
-  final String parent;
-
-  /// Whether this document represents a directory.
-  final bool isDirectory;
-
-  Document({
-    this.id,
-    this.name,
-    this.parent,
-    this.isDirectory,
-  });
-
-  // Use Map<dynamic, dynamic> here, as we get casting errors otherwise. This
-  // won't be typesafe anyway.
-  Document.fromJson(Map<dynamic, dynamic> json)
-      : id = json['id'],
-        name = json['name'],
-        parent = json['parent'],
-        isDirectory = json['isDirectory'];
-}
-
-/// Platform dependent code for the Musicus backend.
-abstract class MusicusPlatform {
-  /// An identifier for the root directory of the music library.
-  ///
-  /// This will be the string, that is stored as musicLibraryPath in the
-  /// settings object.
-  String basePath;
-
-  MusicusPlatform();
-
-  /// This will be called, when the music library path was changed.
-  void setBasePath(String path) {
-    basePath = path;
-  }
-
-  /// Choose a root level directory for the music library.
-  /// 
-  /// This should return a string representation of the chosen directory
-  /// suitable for storage as [basePath].
-  Future<String> chooseBasePath();
-
-  /// Get all documents in a directory.
-  ///
-  /// [parentId] will be the ID of the directory document. If [parentId] is
-  /// null, the children of the root directory will be returned.
-  Future<List<Document>> getChildren(String parentId);
-
-  /// Read the contents of a document by ID.
-  Future<String> readDocument(String id);
-
-  /// Read from a document by name.
-  /// 
-  /// [parentId] is the document ID of the parent directory.
-  Future<String> readDocumentByName(String parentId, String fileName);
-
-  /// Get a string identifying a document.
-  ///
-  /// [parentId] is the document ID of the parent directory. The return value
-  /// should be a string, that the playback object can use to find and play the
-  /// file. It will be included in [InternalTrack] objects by the music
-  /// library.
-  Future<String> getIdentifier(String parentId, String fileName);
-
-  /// Write to a document by name.
-  ///
-  /// [parentId] is the document ID of the parent directory.
-  Future<void> writeDocumentByName(
-      String parentId, String fileName, String contents);
-}

common/lib/src/playback.dart

@@ -1,5 +1,5 @@
 import 'package:meta/meta.dart';
-import 'package:musicus_database/musicus_database.dart';
+import 'package:musicus_common/musicus_common.dart';
 import 'package:rxdart/rxdart.dart';
 
 /// Base class for Musicus playback.
@@ -13,7 +13,7 @@ abstract class MusicusPlayback {
   /// The current playlist.
   ///
   /// If the player is not active, this will be an empty list.
-  final playlist = BehaviorSubject.seeded(<Track>[]);
+  final playlist = BehaviorSubject.seeded(<String>[]);
 
   /// Index of the currently played (or paused) track within the playlist.
   ///
@@ -23,7 +23,7 @@ abstract class MusicusPlayback {
   /// The currently played track.
   ///
   /// This will be null, if there is no  current track.
-  final currentTrack = BehaviorSubject<Track>.seeded(null);
+  final currentTrack = BehaviorSubject<String>.seeded(null);
 
   /// Whether we are currently playing or not.
   ///
@@ -46,10 +46,10 @@ abstract class MusicusPlayback {
   /// Initialize the player.
   ///
   /// This will be called after the database was initialized.
-  Future<void> setup();
+  Future<void> setup(MusicusLibrary library);
 
   /// Add a list of tracks to the players playlist.
-  Future<void> addTracks(List<Track> tracks);
+  Future<void> addTracks(List<String> tracks);
 
   /// Remove the track at [index] from the playlist.
   Future<void> removeTrack(int index);
@@ -96,16 +96,15 @@ abstract class MusicusPlayback {
   /// Update [position] and [normalizedPosition].
   ///
   /// Requires [duration] to be up to date
-  void updatePosition(int positionMs) {
+  void updatePosition(Duration pos) {
-    position.add(Duration(milliseconds: positionMs));
+    position.add(pos);
-    _setNormalizedPosition(positionMs / duration.value.inMilliseconds);
+    _setNormalizedPosition(pos.inMilliseconds / duration.value.inMilliseconds);
   }
 
   /// Update [position], [duration] and [normalizedPosition].
-  void updateDuration(int positionMs, int durationMs) {
+  void updateDuration(Duration dur) {
-    position.add(Duration(milliseconds: positionMs));
+    duration.add(dur);
-    duration.add(Duration(milliseconds: durationMs));
+    _setNormalizedPosition(position.value.inMilliseconds / dur.inMilliseconds);
-    _setNormalizedPosition(positionMs / durationMs);
   }
 
   /// Update [normalizedPosition] ensuring its value is between 0.0 and 1.0.
@@ -124,6 +123,9 @@ abstract class MusicusPlayback {
   /// Requires [playlist] to be up to date.
   void updateCurrentTrack(int index) {
     currentIndex.add(index);
+
+    if (playlist.value != null && index >= 0 && index < playlist.value.length) {
       currentTrack.add(playlist.value[index]);
     }
+  }
 }

common/lib/src/screens/program.dart

@@ -17,7 +17,7 @@ class _ProgramScreenState extends State<ProgramScreen> {
 
   StreamSubscription<bool> playerActiveSubscription;
 
-  StreamSubscription<List<Track>> playlistSubscription;
+  StreamSubscription<List<String>> playlistSubscription;
   List<Widget> widgets = [];
 
   StreamSubscription<double> positionSubscription;
@@ -63,7 +63,7 @@ class _ProgramScreenState extends State<ProgramScreen> {
   }
 
   /// Go through the tracks of [playlist] and preprocess them for displaying.
-  Future<void> updateProgram(List<Track> playlist) async {
+  Future<void> updateProgram(List<String> playlist) async {
     List<Widget> newWidgets = [];
 
     // The following variables exist to adapt the resulting ProgramItem to its
@@ -84,7 +84,7 @@ class _ProgramScreenState extends State<ProgramScreen> {
       // The widgets displayed for this track.
       List<Widget> children = [];
 
-      final track = playlist[i];
+      final track = await backend.db.tracksById(playlist[i]).getSingle();
       final recordingId = track.recording;
       final partIds = track.workParts;
 

common/lib/src/screens/settings.dart

@@ -1,11 +1,9 @@
+import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 
 import '../backend.dart';
 
 class SettingsScreen extends StatelessWidget {
-  static const _platform = MethodChannel('de.johrpan.musicus/platform');
-
   @override
   Widget build(BuildContext context) {
     final backend = MusicusBackend.of(context);
@@ -25,7 +23,7 @@ class SettingsScreen extends StatelessWidget {
                 subtitle: Text(snapshot.data ?? 'Choose folder'),
                 isThreeLine: snapshot.hasData,
                 onTap: () async {
-                  final uri = await backend.platform.chooseBasePath();
+                  final uri = await FilePicker.platform.getDirectoryPath();
 
                   if (uri != null) {
                     settings.setMusicLibraryPath(uri);

common/lib/src/screens/work.dart

@@ -32,8 +32,9 @@ class WorkScreen extends StatelessWidget {
               performanceInfos: recordingInfo.performances,
             ),
             onTap: () async {
-              final tracks = await backend.db.tracksByRecording(recordingId).get();
+              final tracks =
-              backend.playback.addTracks(tracks);
+                  await backend.db.tracksByRecording(recordingId).get();
+              backend.playback.addTracks(tracks.map((t) => t.id).toList());
             },
           );
         },

common/lib/src/widgets/lists.dart

@@ -2,9 +2,6 @@ import 'dart:async';
 
 import 'package:flutter/material.dart';
 
-import '../backend.dart';
-import '../widgets/texts.dart';
-
 /// A list view supporting pagination and searching.
 ///
 /// The [fetch] function will be called, when the user has scrolled to the end

common/lib/src/widgets/player_bar.dart

@@ -15,7 +15,7 @@ class PlayerBar extends StatefulWidget {
 
 class _PlayerBarState extends State<PlayerBar> {
   MusicusBackendState _backend;
-  StreamSubscription<Track> _currentTrackSubscribtion;
+  StreamSubscription<String> _currentTrackSubscribtion;
   WorkInfo _workInfo;
   List<int> _partIds;
 
@@ -26,9 +26,10 @@ class _PlayerBarState extends State<PlayerBar> {
     _backend = MusicusBackend.of(context);
 
     _currentTrackSubscribtion?.cancel();
-    _currentTrackSubscribtion = _backend.playback.currentTrack.listen((track) {
+    _currentTrackSubscribtion =
+        _backend.playback.currentTrack.listen((track) async {
       if (track != null) {
-        _setTrack(track);
+        _setTrack(await _backend.db.tracksById(track).getSingle());
       }
     });
   }

common/pubspec.yaml

@@ -1,12 +1,14 @@
 name: musicus_common
 version: 0.1.0
 description: Common building blocks for Musicus client apps.
+publish_to: none
 
 environment:
   sdk: ">=2.3.0 <3.0.0"
 
 dependencies:
   drift: ^1.0.0
+  file_picker: ^4.5.1
   flutter:
     sdk: flutter
   flutter_markdown:

desktop/lib/main.dart

@@ -4,7 +4,6 @@ import 'package:path/path.dart' as p;
 import 'package:path_provider/path_provider.dart' as pp;
 
 import 'settings.dart';
-import 'platform.dart';
 import 'playback.dart';
 
 Future<void> main() async {
@@ -16,7 +15,6 @@ Future<void> main() async {
   runApp(MusicusApp(
     dbPath: dbPath,
     settingsStorage: SettingsStorage(),
-    platform: MusicusDesktopPlatform(),
     playback: MusicusDesktopPlayback(),
   ));
 }

desktop/lib/platform.dart

@@ -1,58 +0,0 @@
-import 'dart:io';
-
-import 'package:file_picker/file_picker.dart';
-import 'package:musicus_common/musicus_common.dart';
-import 'package:path/path.dart' as p;
-
-class MusicusDesktopPlatform extends MusicusPlatform {
-  @override
-  Future<String> chooseBasePath() async {
-    return await FilePicker.platform.getDirectoryPath();
-  }
-
-  @override
-  Future<List<Document>> getChildren(String parentId) async {
-    final List<Document> result = [];
-
-    final parent = Directory(parentId ?? basePath);
-    await for (final fse in parent.list()) {
-      result.add(Document(
-        id: fse.path,
-        name: p.basename(fse.path),
-        parent: parentId,
-        isDirectory: fse is Directory,
-      ));
-    }
-
-    return result;
-  }
-
-  @override
-  Future<String> getIdentifier(String parentId, String fileName) async {
-    return p.absolute(parentId, fileName);
-  }
-
-  @override
-  Future<String> readDocument(String id) async {
-    try {
-      return await File(id).readAsString();
-    } on FileSystemException {
-      return null;
-    }
-  }
-
-  @override
-  Future<String> readDocumentByName(String parentId, String fileName) async {
-    try {
-      return await File(p.absolute(parentId, fileName)).readAsString();
-    } on FileSystemException {
-      return null;
-    }
-  }
-
-  @override
-  Future<void> writeDocumentByName(
-      String parentId, String fileName, String contents) async {
-    await File(p.absolute(parentId, fileName)).writeAsString(contents);
-  }
-}

desktop/lib/playback.dart

@@ -1,13 +1,12 @@
 import 'package:musicus_common/musicus_common.dart';
-import 'package:musicus_database/musicus_database.dart';
 
 class MusicusDesktopPlayback extends MusicusPlayback {
   @override
-  Future<void> setup() async {}
+  Future<void> setup(MusicusLibrary library) async {}
 
   @override
-  Future<void> addTracks(List<Track> tracks) async {
+  Future<void> addTracks(List<String> tracks) async {
-    final List<Track> newPlaylist = List.from(playlist.value);
+    final List<String> newPlaylist = List.from(playlist.value);
     newPlaylist.addAll(tracks);
     playlist.add(newPlaylist);
     active.add(true);
@@ -20,7 +19,7 @@ class MusicusDesktopPlayback extends MusicusPlayback {
 
   @override
   Future<void> removeTrack(int index) async {
-    final List<Track> tracks = List.from(playlist.value);
+    final List<String> tracks = List.from(playlist.value);
     tracks.removeAt(index);
     playlist.add(tracks);
   }
@@ -29,7 +28,7 @@ class MusicusDesktopPlayback extends MusicusPlayback {
   Future<void> seekTo(double pos) async {
     if (active.value && pos >= 0.0 && pos <= 1.0) {
       final durationMs = duration.value.inMilliseconds;
-      updatePosition((pos * durationMs).floor());
+      updatePosition(Duration(milliseconds: (pos * durationMs).floor()));
     }
   }
 

desktop/pubspec.yaml

@@ -1,6 +1,7 @@
 name: musicus_desktop
 version: 0.1.0
 description: Desktop version of the classical music player and organizer.
+publish_to: none
 
 environment:
   sdk: ">=2.3.0 <3.0.0"