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lyrics_controller.dart
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lyrics_controller.dart
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/// copyright: google search request is originally from [@netlob](https://github.com/netlob/dart-lyrics), edited to fit Namida.
// ignore_for_file: depend_on_referenced_packages
import 'dart:convert';
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:http/http.dart' as http;
import 'package:lrc/lrc.dart';
import 'package:path/path.dart' as p;
import 'package:namida/class/lyrics.dart';
import 'package:namida/class/track.dart';
import 'package:namida/controller/settings_controller.dart';
import 'package:namida/controller/wakelock_controller.dart';
import 'package:namida/core/constants.dart';
import 'package:namida/core/enums.dart';
import 'package:namida/core/extensions.dart';
import 'package:namida/packages/lyrics_lrc_parsed_view.dart';
class Lyrics {
static Lyrics get inst => _instance;
static final Lyrics _instance = Lyrics._internal();
Lyrics._internal();
final textScrollController = ScrollController(keepScrollOffset: true);
GlobalKey<LyricsLRCParsedViewState>? lrcViewKey;
final lrcViewKeyFullscreen = GlobalKey<LyricsLRCParsedViewState>();
final currentLyricsText = ''.obs;
final currentLyricsLRC = Rxn<Lrc>();
final lyricsCanBeAvailable = true.obs;
Track? _currentTrack;
bool get _lyricsEnabled => settings.enableLyrics.value;
bool get _lyricsPrioritizeEmbedded => settings.prioritizeEmbeddedLyrics.value;
LyricsSource get _lyricsSource => settings.lyricsSource.value;
void _updateWidgets(Lrc? lrc) {
WakelockController.inst.updateLRCStatus(lrc != null);
lrcViewKey?.currentState?.fillLists(lrc);
lrcViewKeyFullscreen.currentState?.fillLists(lrc);
}
Future<void> updateLyrics(Track track) async {
_currentTrack = track;
currentLyricsText.value = '';
currentLyricsLRC.value = null;
_updateWidgets(null);
try {
textScrollController.jumpTo(0);
} catch (_) {}
lrcViewKey = GlobalKey<LyricsLRCParsedViewState>();
lyricsCanBeAvailable.value = true;
if (!_lyricsEnabled) return;
final embedded = track.lyrics;
if (_lyricsPrioritizeEmbedded && embedded != '') {
final lrc = embedded.parseLRC();
if (lrc != null && lrc.lyrics.isNotEmpty) {
currentLyricsLRC.value = lrc;
_updateWidgets(lrc);
} else {
currentLyricsText.value = embedded;
}
return;
}
/// 1. device lrc
/// 2. cached lrc
/// 3. track embedded lrc
/// 4. database.
final lrcLyrics = await _fetchLRCBasedLyrics(track, embedded, _lyricsSource);
if (lrcLyrics != null) {
if (_currentTrack == track) {
currentLyricsLRC.value = lrcLyrics;
_updateWidgets(lrcLyrics);
}
} else {
/// 1. cached txt lyrics
/// 2. track embedded txt
/// 3. google search
final textLyrics = await _fetchTextBasedLyrics(track, embedded, _lyricsSource);
if (textLyrics != '') {
if (_currentTrack == track) {
currentLyricsText.value = textLyrics;
}
} else {
lyricsCanBeAvailable.value = false;
}
}
}
bool hasLyrics(Track tr) {
return tr.lyrics != '' || lyricsFileCache(tr).existsSync() || lyricsFilesDevice(tr).any((element) => element.existsSync()) || lyricsFileText(tr).existsSync();
}
File lyricsFileText(Track tr) => File(p.join(AppDirs.LYRICS, "${tr.filename}.txt"));
File lyricsFileCache(Track tr) => File(p.join(AppDirs.LYRICS, "${tr.filename}.lrc"));
List<File> lyricsFilesDevice(Track tr) {
final dirPath = tr.path.getDirectoryPath;
return [
File(p.join(dirPath, "${tr.filename}.lrc")),
File(p.join(dirPath, "${tr.filenameWOExt}.lrc")),
File(p.join(dirPath, "${tr.filename}.LRC")),
File(p.join(dirPath, "${tr.filenameWOExt}.LRC")),
];
}
Future<void> saveLyricsToCache(Track track, String lyricsText, bool isSynced) async {
final fc = isSynced ? lyricsFileCache(track) : lyricsFileText(track);
await fc.create();
await fc.writeAsString(lyricsText);
}
Future<Lrc?> _fetchLRCBasedLyrics(Track track, String trackLyrics, LyricsSource source) async {
final fc = lyricsFileCache(track);
Future<Lrc?> parseLRCFile(File file) async {
final content = await file.readAsString();
return content.parseLRC();
}
Lrc? lrc;
/// 1. device lrc
/// 2. cached lrc
/// 3. track embedded
if (source != LyricsSource.internet) {
final lyricsFilesLocal = lyricsFilesDevice(track);
for (final lf in lyricsFilesLocal) {
if (await lf.existsAndValid()) {
lrc = await parseLRCFile(lf);
break;
}
}
if (lrc == null) {
if (await fc.existsAndValid()) {
lrc = await parseLRCFile(fc);
} else if (trackLyrics != '') {
lrc = trackLyrics.parseLRC();
}
}
}
/// 4. if still null, fetch from database.
if (source != LyricsSource.local && lrc == null) {
final tries = <(String, String, String)>[]; // title, artist, album
tries.addAll([
(track.title, track.originalArtist, ''),
(track.title, track.originalArtist, track.album),
if (track.artistsList.isNotEmpty) (track.title, track.artistsList.first, ''),
if (track.artistsList.isNotEmpty) (track.title, track.artistsList.first, track.album),
]);
final lyrics = <LyricsModel>[];
for (final t in tries) {
lyrics.addAll(
await fetchLRCBasedLyricsFromInternet(
durationInSeconds: track.duration,
title: t.$1,
artist: t.$2,
album: t.$3,
),
);
if (lyrics.isNotEmpty) break;
}
final text = lyrics.firstOrNull?.lyrics;
if (text != null) await fc.writeAsString(text);
return text?.parseLRC();
}
return lrc;
}
Future<List<LyricsModel>> fetchLRCBasedLyricsFromInternet({
String title = '',
String artist = '',
String album = '',
required int durationInSeconds,
String customQuery = '',
}) async {
String formatTime(int seconds) {
final duration = Duration(seconds: seconds);
final min = duration.inMinutes.remainder(60);
final sec = duration.inSeconds.remainder(60);
final ms = duration.inMilliseconds.remainder(1000);
String pad(int n) => n.toString().padLeft(2, '0');
final formattedTime = '${pad(min)}:${pad(sec)}.${pad(ms)}';
return formattedTime;
}
final params = [
if (title != '') 'track_name=$title',
if (artist != '') 'artist_name=${artist.split('(').first.split('[').first}',
if (album != '') 'album_name=$album',
].join('&');
if (params.isNotEmpty || customQuery != '') {
final tail = customQuery == '' ? params : 'q=$customQuery';
final urlPre = "https://lrclib.net/api/search?$tail";
final url = Uri.parse(Uri.encodeFull(urlPre));
try {
final req = await http.get(url);
final fetched = <LyricsModel>[];
final jsonLists = (jsonDecode(req.body) as List<dynamic>?) ?? [];
for (final jsonRes in jsonLists) {
final syncedLyrics = jsonRes?["syncedLyrics"] as String? ?? '';
final plain = jsonRes?["plainLyrics"] as String? ?? '';
if (syncedLyrics != '') {
// lrc
final lines = <String>[];
if (artist != '') lines.add('[ar:$artist]');
if (album != '') lines.add('[al:$album]');
if (title != '') lines.add('[ti:$title]');
if (durationInSeconds > 0) lines.add('[length:${formatTime(durationInSeconds)}]');
for (final l in syncedLyrics.split('\n')) {
lines.add(l);
}
final resultedLRC = lines.join('\n');
fetched.add(LyricsModel(
lyrics: resultedLRC,
isInCache: false,
fromInternet: true,
synced: true,
file: null,
isEmbedded: false,
));
} else if (plain != '') {
// txt
fetched.add(LyricsModel(
lyrics: plain,
isInCache: false,
fromInternet: true,
synced: false,
file: null,
isEmbedded: false,
));
}
}
fetched.removeDuplicates();
return fetched;
} catch (_) {}
}
return [];
}
Future<String> _fetchTextBasedLyrics(Track track, String trackLyrics, LyricsSource source) async {
final lyricsFile = lyricsFileText(track);
/// get from storage
if (source != LyricsSource.internet && await lyricsFile.existsAndValid()) {
return await lyricsFile.readAsString();
} else if (source != LyricsSource.internet && trackLyrics != '') {
return trackLyrics;
}
/// download lyrics
else if (source != LyricsSource.local) {
final lyrics = await _fetchLyricsGoogle(artist: track.artistsList.firstOrNull ?? '', title: track.title);
final regex = RegExp(r'<[^>]*>');
if (lyrics != '') {
final formattedText = lyrics.replaceAll(regex, '');
await lyricsFile.writeAsString(formattedText);
return formattedText;
}
}
return '';
}
Future<String> _fetchLyricsGoogle({String title = '', String artist = ''}) async {
if (title == '' && artist == '') return '';
const url = "https://www.google.com/search?client=safari&rls=en&ie=UTF-8&oe=UTF-8&q=";
const delimiter1 = '</div></div></div></div><div class="hwc"><div class="BNeawe tAd8D AP7Wnd"><div><div class="BNeawe tAd8D AP7Wnd">';
const delimiter2 = '</div></div></div></div></div><div><span class="hwc"><div class="BNeawe uEec3 AP7Wnd">';
Future<String> requestQuery(String searchText) async {
http.Response? res;
try {
res = await http.get(Uri.parse(Uri.encodeFull(searchText))).timeout(const Duration(seconds: 10));
} catch (_) {}
if (res == null) return '';
final lyricsRes = res.body.split(delimiter1).last.split(delimiter2).first;
if (lyricsRes.contains('<meta charset="UTF-8">')) return '';
if (lyricsRes.contains('please enable javascript on your web browser')) return '';
if (lyricsRes.contains('Error 500 (Server Error)')) return '';
if (lyricsRes.contains('systems have detected unusual traffic from your computer network')) return '';
return lyricsRes;
}
String lyrics = '';
final possibleQueries = [
'$url$title by $artist lyrics',
'$url${title.split("-").first} by $artist lyrics',
'$url$title by $artist song lyrics',
];
for (final q in possibleQueries) {
lyrics = await requestQuery(q);
if (lyrics != '') break;
}
// final List<String> split = lyrics.split('\n');
// String result = '';
// for (int i = 0; i < split.length; i++) {
// result = '$result${split[i]}\n';
// }
// return result.trim();
return lyrics;
}
}