freezer/lib/api/cache.dart

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import 'dart:async';
import 'package:freezer/api/deezer.dart';
import 'package:freezer/api/definitions.dart';
import 'package:freezer/ui/details_screens.dart';
import 'package:freezer/ui/library.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 = [];
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//All sorting cached
@JsonKey(defaultValue: [])
List<Sorting> sorts = [];
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//Sleep timer
@JsonKey(ignore: true)
DateTime sleepTimerTime;
@JsonKey(ignore: true)
StreamSubscription sleepTimer;
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//Search history
@JsonKey(name: 'searchHistory2', toJson: _searchHistoryToJson, fromJson: _searchHistoryFromJson)
List<SearchHistoryItem> searchHistory;
//If download threads warning was shown
@JsonKey(defaultValue: false)
bool threadsWarning;
//Last time update check
@JsonKey(defaultValue: 0)
int lastUpdateCheck;
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);
}
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//Add to history
void addToSearchHistory(dynamic item) async {
if (searchHistory == null)
searchHistory = [];
if (item is Track)
searchHistory.add(SearchHistoryItem(item, SearchHistoryItemType.TRACK));
if (item is Album)
searchHistory.add(SearchHistoryItem(item, SearchHistoryItemType.ALBUM));
if (item is Artist)
searchHistory.add(SearchHistoryItem(item, SearchHistoryItemType.ARTIST));
if (item is Playlist)
searchHistory.add(SearchHistoryItem(item, SearchHistoryItemType.PLAYLIST));
await save();
}
//Save, load
static Future<String> getPath() async {
return p.join((await getApplicationDocumentsDirectory()).path, 'metacache.json');
}
static Future wipe() async {
await File(await getPath()).delete();
}
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);
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//Search History JSON
static List<SearchHistoryItem> _searchHistoryFromJson(List<dynamic> json) {
return (json??[]).map<SearchHistoryItem>((i) => _searchHistoryItemFromJson(i)).toList();
}
static SearchHistoryItem _searchHistoryItemFromJson(Map<String, dynamic> json) {
SearchHistoryItemType type = SearchHistoryItemType.values[json['type']];
dynamic data;
switch (type) {
case SearchHistoryItemType.TRACK:
data = Track.fromJson(json['data']);
break;
case SearchHistoryItemType.ALBUM:
data = Album.fromJson(json['data']);
break;
case SearchHistoryItemType.ARTIST:
data = Artist.fromJson(json['data']);
break;
case SearchHistoryItemType.PLAYLIST:
data = Playlist.fromJson(json['data']);
break;
}
return SearchHistoryItem(data, type);
}
static List<Map<String, dynamic>> _searchHistoryToJson(List<SearchHistoryItem> data) => (data??[]).map<Map<String, dynamic>>((i) => {"type": i.type.index, "data": i.data.toJson()}).toList();
}
@JsonSerializable()
class SearchHistoryItem {
dynamic data;
SearchHistoryItemType type;
SearchHistoryItem(this.data, this.type);
}
enum SearchHistoryItemType {
TRACK,
ALBUM,
ARTIST,
PLAYLIST
}