import 'dart:async'; import 'package:cached_network_image/cached_network_image.dart'; import 'package:disk_space/disk_space.dart'; import 'package:filesize/filesize.dart'; import 'package:flutter/services.dart'; import 'package:flutter_cache_manager/flutter_cache_manager.dart'; import 'package:fluttertoast/fluttertoast.dart'; import 'package:freezer/api/deezer.dart'; import 'package:freezer/api/definitions.dart'; import 'package:freezer/settings.dart'; import 'package:path_provider/path_provider.dart'; import 'package:path/path.dart' as p; import 'package:permission_handler/permission_handler.dart'; import 'package:freezer/translations.i18n.dart'; import 'dart:io'; import 'package:sqflite/sqflite.dart'; import 'package:sqflite/sql.dart'; DownloadManager downloadManager = DownloadManager(); class DownloadManager { //Platform channels static MethodChannel platform = MethodChannel('f.f.freezer/native'); static EventChannel eventChannel = EventChannel('f.f.freezer/downloads'); bool running = false; int queueSize = 0; StreamController serviceEvents = StreamController.broadcast(); String offlinePath; Database db; //Start/Resume downloads Future start() async { await updateServiceSettings(); await platform.invokeMethod('start'); } //Stop/Pause downloads Future stop() async { await platform.invokeMethod('stop'); } Future init() async { //Remove old DB File oldDbFile = File(p.join((await getDatabasesPath()), 'offline.db')); if (await oldDbFile.exists()) { await oldDbFile.delete(); } String dbPath = p.join((await getDatabasesPath()), 'offline2.db'); //Open db db = await openDatabase( dbPath, version: 1, onCreate: (Database db, int version) async { Batch b = db.batch(); //Create tables, if doesn't exit b.execute("""CREATE TABLE Tracks ( id TEXT PRIMARY KEY, title TEXT, album TEXT, artists TEXT, duration INTEGER, albumArt TEXT, trackNumber INTEGER, offline INTEGER, lyrics TEXT, favorite INTEGER, diskNumber INTEGER, explicit INTEGER)"""); b.execute("""CREATE TABLE Albums ( id TEXT PRIMARY KEY, title TEXT, artists TEXT, tracks TEXT, art TEXT, fans INTEGER, offline INTEGER, library INTEGER, type INTEGER, releaseDate TEXT)"""); b.execute("""CREATE TABLE Artists ( id TEXT PRIMARY KEY, name TEXT, albums TEXT, topTracks TEXT, picture TEXT, fans INTEGER, albumCount INTEGER, offline INTEGER, library INTEGER, radio INTEGER)"""); b.execute("""CREATE TABLE Playlists ( id TEXT PRIMARY KEY, title TEXT, tracks TEXT, image TEXT, duration INTEGER, userId TEXT, userName TEXT, fans INTEGER, library INTEGER, description TEXT)"""); await b.commit(); } ); //Create offline directory offlinePath = p.join((await getExternalStorageDirectory()).path, 'offline/'); await Directory(offlinePath).create(recursive: true); //Update settings await updateServiceSettings(); //Listen to state change event eventChannel.receiveBroadcastStream().listen((e) { if (e['action'] == 'onStateChange') { running = e['running']; queueSize = e['queueSize']; } //Forward serviceEvents.add(e); }); await platform.invokeMethod('loadDownloads'); } //Get all downloads from db Future> getDownloads() async { List raw = await platform.invokeMethod('getDownloads'); return raw.map((d) => Download.fromJson(d)).toList(); } //Insert track and metadata to DB Future _addTrackToDB(Batch batch, Track track, bool overwriteTrack) async { batch.insert('Tracks', track.toSQL(off: true), conflictAlgorithm: overwriteTrack?ConflictAlgorithm.replace:ConflictAlgorithm.ignore); batch.insert('Albums', track.album.toSQL(off: false), conflictAlgorithm: ConflictAlgorithm.ignore); //Artists for (Artist a in track.artists) { batch.insert('Artists', a.toSQL(off: false), conflictAlgorithm: ConflictAlgorithm.ignore); } return batch; } Future addOfflineTrack(Track track, {private = true}) async { //Permission if (!private && !(await checkPermission())) return; //Add to DB if (private) { Batch b = db.batch(); b = await _addTrackToDB(b, track, true); await b.commit(); //Cache art DefaultCacheManager().getSingleFile(track.albumArt.thumb); DefaultCacheManager().getSingleFile(track.albumArt.full); } //Get path String path = _generatePath(track, private); await platform.invokeMethod('addDownloads', [await Download.jsonFromTrack(track, path, private: private)]); await start(); } Future addOfflineAlbum(Album album, {private = true}) async { //Permission if (!private && !(await checkPermission())) return; //Get from API if no tracks if (album.tracks == null || album.tracks.length == 0) { album = await deezerAPI.album(album.id); } //Add to DB if (private) { //Cache art DefaultCacheManager().getSingleFile(album.art.thumb); DefaultCacheManager().getSingleFile(album.art.full); Batch b = db.batch(); b.insert('Albums', album.toSQL(off: true), conflictAlgorithm: ConflictAlgorithm.replace); for (Track t in album.tracks) { b = await _addTrackToDB(b, t, false); } await b.commit(); } //Create downloads List out = []; for (Track t in album.tracks) { out.add(await Download.jsonFromTrack(t, _generatePath(t, private), private: private)); } await platform.invokeMethod('addDownloads', out); await start(); } Future addOfflinePlaylist(Playlist playlist, {private = true}) async { //Permission if (!private && !(await checkPermission())) return; //Get tracks if missing if (playlist.tracks == null || playlist.tracks.length < playlist.trackCount) { playlist = await deezerAPI.fullPlaylist(playlist.id); } //Add to DB if (private) { Batch b = db.batch(); b.insert('Playlists', playlist.toSQL(), conflictAlgorithm: ConflictAlgorithm.replace); for (Track t in playlist.tracks) { b = await _addTrackToDB(b, t, false); //Cache art DefaultCacheManager().getSingleFile(t.albumArt.thumb); DefaultCacheManager().getSingleFile(t.albumArt.full); } await b.commit(); } //Generate downloads List out = []; for (int i=0; i getOfflineTrack(String id, {Album album, List artists}) async { List tracks = await db.query('Tracks', where: 'id == ?', whereArgs: [id]); if (tracks.length == 0) return null; Track track = Track.fromSQL(tracks[0]); //Get album if (album == null) { List rawAlbums = await db.query('Albums', where: 'id == ?', whereArgs: [track.album.id]); if (rawAlbums.length > 0) track.album = Album.fromSQL(rawAlbums[0]); } else { track.album = album; } //Get artists if (artists == null) { List newArtists = []; for (Artist artist in track.artists) { List rawArtist = await db.query('Artists', where: 'id == ?', whereArgs: [artist.id]); if (rawArtist.length > 0) newArtists.add(Artist.fromSQL(rawArtist[0])); } if (newArtists.length > 0) track.artists = newArtists; } else { track.artists = artists; } return track; } //Get offline library tracks Future> getOfflineTracks() async { List rawTracks = await db.query('Tracks', where: 'library == 1 AND offline == 1', columns: ['id']); List out = []; //Load track meta individually for (Map rawTrack in rawTracks) { out.add(await getOfflineTrack(rawTrack['id'])); } return out; } //Get all offline available tracks Future> allOfflineTracks() async { List rawTracks = await db.query('Tracks', where: 'offline == 1', columns: ['id']); List out = []; //Load track meta individually for (Map rawTrack in rawTracks) { out.add(await getOfflineTrack(rawTrack['id'])); } return out; } //Get all offline albums Future> getOfflineAlbums() async { List rawAlbums = await db.query('Albums', where: 'offline == 1', columns: ['id']); List out = []; //Load each album for (Map rawAlbum in rawAlbums) { out.add(await getOfflineAlbum(rawAlbum['id'])); } return out; } //Get offline album with meta Future getOfflineAlbum(String id) async { List rawAlbums = await db.query('Albums', where: 'id == ?', whereArgs: [id]); if (rawAlbums.length == 0) return null; Album album = Album.fromSQL(rawAlbums[0]); List tracks = []; //Load tracks for (int i=0; i artists = []; for (int i=0; i getOfflineArtist(String id) async { List rawArtists = await db.query("Artists", where: 'id == ?', whereArgs: [id]); if (rawArtists.length == 0) return null; return Artist.fromSQL(rawArtists[0]); } //Get all offline playlists Future> getOfflinePlaylists() async { List rawPlaylists = await db.query('Playlists', columns: ['id']); List out = []; for (Map rawPlaylist in rawPlaylists) { out.add(await getPlaylist(rawPlaylist['id'])); } return out; } //Get offline playlist Future getPlaylist(String id) async { List rawPlaylists = await db.query('Playlists', where: 'id == ?', whereArgs: [id]); if (rawPlaylists.length == 0) return null; Playlist playlist = Playlist.fromSQL(rawPlaylists[0]); //Load tracks List tracks = []; for (Track t in playlist.tracks) { tracks.add(await getOfflineTrack(t.id)); } playlist.tracks = tracks; return playlist; } Future removeOfflineTracks(List tracks) async { for (Track t in tracks) { //Check if library List rawTrack = await db.query('Tracks', where: 'id == ?', whereArgs: [t.id], columns: ['favorite']); if (rawTrack.length > 0 && rawTrack[0]['favorite'] == 0) { //Count occurrences in playlists and albums List albums = await db.rawQuery('SELECT (id) FROM Albums WHERE tracks LIKE "%${t.id}%"'); List playlists = await db.rawQuery('SELECT (id) FROM Playlists WHERE tracks LIKE "%${t.id}%"'); if (albums.length + playlists.length == 0) { //Safe to remove await db.delete('Tracks', where: 'id == ?', whereArgs: [t.id]); //Remove file try { File(p.join(offlinePath, t.id)).delete(); } catch (e) { print(e); } } } } } Future removeOfflineAlbum(String id) async { //Get album List rawAlbums = await db.query('Albums', where: 'id == ?', whereArgs: [id]); if (rawAlbums.length == 0) return; Album album = Album.fromSQL(rawAlbums[0]); //Remove album await db.delete('Albums', where: 'id == ?', whereArgs: [id]); //Remove tracks await removeOfflineTracks(album.tracks); } Future removeOfflinePlaylist(String id) async { //Fetch playlist List rawPlaylists = await db.query('Playlists', where: 'id == ?', whereArgs: [id]); if (rawPlaylists.length == 0) return; Playlist playlist = Playlist.fromSQL(rawPlaylists[0]); //Remove playlist await db.delete('Playlists', where: 'id == ?', whereArgs: [id]); await removeOfflineTracks(playlist.tracks); } //Check if album, track or playlist is offline Future checkOffline({Album album, Track track, Playlist playlist}) async { //Track if (track != null) { List res = await db.query('Tracks', where: 'id == ? AND offline == 1', whereArgs: [track.id]); if (res.length == 0) return false; return true; } //Album if (album != null) { List res = await db.query('Albums', where: 'id == ? AND offline == 1', whereArgs: [album.id]); if (res.length == 0) return false; return true; } //Playlist if (playlist != null) { List res = await db.query('Playlists', where: 'id == ?', whereArgs: [playlist.id]); if (res.length == 0) return false; return true; } return false; } //Offline search Future search(String query) async { SearchResults results = SearchResults(tracks: [], albums: [], artists: [], playlists: []); //Tracks List tracksData = await db.rawQuery('SELECT * FROM tracks WHERE offline == 1 AND title like "%$query%"'); for (Map trackData in tracksData) { results.tracks.add(await getOfflineTrack(trackData['id'])); } //Albums List albumsData = await db.rawQuery('SELECT (id) FROM albums WHERE offline == 1 AND title like "%$query%"'); for (Map rawAlbum in albumsData) { results.albums.add(await getOfflineAlbum(rawAlbum['id'])); } //Playlists List playlists = await db.rawQuery('SELECT * FROM playlists WHERE title like "%$query%"'); for (Map playlist in playlists) { results.playlists.add(await getPlaylist(playlist['id'])); } return results; } //Sanitize filename String sanitize(String input) { RegExp sanitize = RegExp(r'[\/\\\?\%\*\:\|\"\<\>]'); return input.replaceAll(sanitize, ''); } //Generate track download path String _generatePath(Track track, bool private, {String playlistName, int playlistTrackNumber}) { String path; if (private) { path = p.join(offlinePath, track.id); } else { //Download path path = settings.downloadPath; if (settings.playlistFolder && playlistName != null) path = p.join(path, sanitize(playlistName)); if (settings.artistFolder) path = p.join(path, '%artist%'); //Album folder / with disk number if (settings.albumFolder) { if (settings.albumDiscFolder) { path = p.join(path, '%album%' + ' - Disk ' + track.diskNumber.toString()); } else { path = p.join(path, '%album%'); } } //Final path path = p.join(path, settings.downloadFilename); //Playlist track number variable (not accessible in service) if (playlistTrackNumber != null) { path = path.replaceAll('%playlistTrackNumber%', playlistTrackNumber.toString()); path = path.replaceAll('%0playlistTrackNumber%', playlistTrackNumber.toString().padLeft(2, '0')); } else { path = path.replaceAll('%playlistTrackNumber%', ''); path = path.replaceAll('%0playlistTrackNumber%', ''); } } return path; } //Get stats for library screen Future> getStats() async { //Get offline counts int trackCount = (await db.rawQuery('SELECT COUNT(*) FROM tracks WHERE offline == 1'))[0]['COUNT(*)']; int albumCount = (await db.rawQuery('SELECT COUNT(*) FROM albums WHERE offline == 1'))[0]['COUNT(*)']; int playlistCount = (await db.rawQuery('SELECT COUNT(*) FROM albums WHERE offline == 1'))[0]['COUNT(*)']; //Free space double diskSpace = await DiskSpace.getFreeDiskSpace; //Used space List offlineStat = await Directory(offlinePath).list().toList(); int offlineSize = 0; for (var fs in offlineStat) { offlineSize += (await fs.stat()).size; } //Return in list, //TODO: Make into class in future return ([ trackCount.toString(), albumCount.toString(), playlistCount.toString(), filesize(offlineSize), filesize((diskSpace * 1000000).floor()) ]); } //Send settings to download service Future updateServiceSettings() async { await platform.invokeMethod('updateSettings', settings.getServiceSettings()); } //Check storage permission Future checkPermission() async { if (await Permission.storage.request().isGranted) { return true; } else { Fluttertoast.showToast( msg: 'Storage permission denied!'.i18n, toastLength: Toast.LENGTH_SHORT, gravity: ToastGravity.BOTTOM ); return false; } } //Remove download from queue/finished Future removeDownload(int id) async { await platform.invokeMethod('removeDownload', {'id': id}); } //Restart failed downloads Future retryDownloads() async { await platform.invokeMethod('retryDownloads'); } //Delete downloads by state Future removeDownloads(DownloadState state) async { await platform.invokeMethod('removeDownloads', {'state': DownloadState.values.indexOf(state)}); } } class Download { int id; String path; bool private; String trackId; String md5origin; String mediaVersion; String title; String image; int quality; //Dynamic DownloadState state; int received; int filesize; Download({this.id, this.path, this.private, this.trackId, this.md5origin, this.mediaVersion, this.title, this.image, this.state, this.received, this.filesize, this.quality}); //Get progress between 0 - 1 double get progress { return ((received.toDouble()??0.0)/(filesize.toDouble()??1.0)).toDouble(); } factory Download.fromJson(Map data) { return Download( path: data['path'], image: data['image'], private: data['private'], trackId: data['trackId'], id: data['id'], state: DownloadState.values[data['state']], title: data['title'], quality: data['quality'] ); } //Change values from "update json" void updateFromJson(Map data) { this.quality = data['quality']; this.received = data['received']??0; this.state = DownloadState.values[data['state']]; //Prevent null division later this.filesize = ((data['filesize']??0) <= 0) ? 1 : (data['filesize']??1); } //Track to download JSON for service static Future jsonFromTrack(Track t, String path, {private = true}) async { //Get download info if (t.playbackDetails == null || t.playbackDetails == []) { t = await deezerAPI.track(t.id); } return { "private": private, "trackId": t.id, "md5origin": t.playbackDetails[0], "mediaVersion": t.playbackDetails[1], "quality": private ? settings.getQualityInt(settings.offlineQuality) : settings.getQualityInt(settings.downloadQuality), "title": t.title, "path": path, "image": t.albumArt.thumb }; } } //Has to be same order as in java enum DownloadState { NONE, DOWNLOADING, POST, DONE, DEEZER_ERROR, ERROR }