0.5.0 - Rewritten downloads, many bugfixes

lib/api/cache.dart

@@ -0,0 +1,67 @@
+import 'package:freezer/api/deezer.dart';
+import 'package:freezer/api/definitions.dart';
+import 'package:freezer/ui/details_screens.dart';
+import 'package:json_annotation/json_annotation.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:path/path.dart' as p;
+
+import 'dart:io';
+import 'dart:convert';
+
+part 'cache.g.dart';
+
+Cache cache;
+
+//Cache for miscellaneous things
+@JsonSerializable()
+class Cache {
+
+  //ID's of tracks that are in library
+  List<String> libraryTracks = [];
+
+  //Track ID of logged track, to prevent duplicates
+  @JsonKey(ignore: true)
+  String loggedTrackId;
+
+  @JsonKey(defaultValue: [])
+  List<Track> history = [];
+
+  //Cache playlist sort type {id: sort}
+  @JsonKey(defaultValue: {})
+  Map<String, SortType> playlistSort;
+
+
+  Cache({this.libraryTracks});
+
+  //Wrapper to test if track is favorite against cache
+  bool checkTrackFavorite(Track t) {
+    if (t.favorite != null && t.favorite) return true;
+    if (libraryTracks == null || libraryTracks.length == 0) return false;
+    return libraryTracks.contains(t.id);
+  }
+
+  //Save, load
+  static Future<String> getPath() async {
+    return p.join((await getApplicationDocumentsDirectory()).path, 'metacache.json');
+  }
+
+  static Future<Cache> load() async {
+    File file = File(await Cache.getPath());
+    //Doesn't exist, create new
+    if (!(await file.exists())) {
+      Cache c = Cache();
+      await c.save();
+      return c;
+    }
+    return Cache.fromJson(jsonDecode(await file.readAsString()));
+  }
+
+  Future save() async {
+    File file = File(await Cache.getPath());
+    file.writeAsString(jsonEncode(this.toJson()));
+  }
+
+  //JSON
+  factory Cache.fromJson(Map<String, dynamic> json) => _$CacheFromJson(json);
+  Map<String, dynamic> toJson() => _$CacheToJson(this);
+}