✨ Kugou music source

lib/services/database/tables/preferences.dart

@@ -14,7 +14,8 @@ enum CloseBehavior {
 enum AudioSource {
   youtube,
   piped,
-  netease;
+  netease,
+  kugou;
 
   String get label => name[0].toUpperCase() + name.substring(1);
 }

lib/services/database/tables/source_match.dart

@@ -3,7 +3,8 @@ part of '../database.dart';
 enum SourceType {
   youtube._('YouTube'),
   youtubeMusic._('YouTube Music'),
-  netease._('Netease Music');
+  netease._('Netease Music'),
+  kugou._('Kugou Music');
 
   final String label;
 

lib/services/server/routes/playback.dart

@@ -1,3 +1,5 @@
+import 'dart:convert';
+
 import 'package:dio/dio.dart' hide Response;
 import 'package:flutter/foundation.dart';
 import 'package:get/get.dart' hide Response;
@@ -6,6 +8,7 @@ import 'package:rhythm_box/providers/error_notifier.dart';
 import 'package:rhythm_box/services/audio_player/audio_player.dart';
 import 'package:rhythm_box/services/server/active_sourced_track.dart';
 import 'package:rhythm_box/services/server/sourced_track.dart';
+import 'package:rhythm_box/services/sourced_track/sources/kugou.dart';
 import 'package:rhythm_box/services/sourced_track/sources/netease.dart';
 import 'package:shelf/shelf.dart';
 
@@ -34,6 +37,13 @@ class ServerPlaybackRoutesProvider {
         );
         final realUrl = resp.body['data'][0]['url'];
         url = realUrl;
+      } else if (sourcedTrack is KugouSourcedTrack) {
+        // Special processing for kugou to get real assets url
+        final resp = await GetConnect(timeout: const Duration(seconds: 30))
+            .get(sourcedTrack.url);
+        final realUrl =
+            KugouSourcedTrack.unescapeUrl(jsonDecode(resp.body)['url'][0]);
+        url = realUrl;
       }
 
       final res = await Dio().get(

lib/services/sourced_track/sourced_track.dart

@@ -3,6 +3,7 @@ import 'package:get/get.dart';
 import 'package:rhythm_box/providers/error_notifier.dart';
 import 'package:rhythm_box/providers/user_preferences.dart';
 import 'package:rhythm_box/services/database/database.dart';
+import 'package:rhythm_box/services/sourced_track/sources/kugou.dart';
 import 'package:rhythm_box/services/sourced_track/sources/netease.dart';
 import 'package:rhythm_box/services/utils.dart';
 import 'package:spotify/spotify.dart';
@@ -104,6 +105,8 @@ abstract class SourcedTrack extends Track {
       return switch (audioSource) {
         AudioSource.netease =>
           await NeteaseSourcedTrack.fetchFromTrack(track: track),
+        AudioSource.kugou =>
+          await KugouSourcedTrack.fetchFromTrack(track: track),
         AudioSource.piped =>
           await PipedSourcedTrack.fetchFromTrack(track: track),
         _ => await YoutubeSourcedTrack.fetchFromTrack(track: track),
@@ -117,6 +120,8 @@ abstract class SourcedTrack extends Track {
         AudioSource.youtube =>
           await NeteaseSourcedTrack.fetchFromTrack(track: track),
         AudioSource.netease =>
+          await KugouSourcedTrack.fetchFromTrack(track: track),
+        AudioSource.kugou =>
           await YoutubeSourcedTrack.fetchFromTrack(track: track),
       };
     } on HttpClientClosedException catch (_) {

lib/services/sourced_track/sources/kugou.dart

@@ -0,0 +1,229 @@
+import 'dart:convert';
+
+import 'package:collection/collection.dart';
+import 'package:drift/drift.dart';
+import 'package:crypto/crypto.dart';
+import 'package:get/get.dart' hide Value;
+import 'package:rhythm_box/providers/database.dart';
+import 'package:rhythm_box/services/database/database.dart';
+import 'package:spotify/spotify.dart';
+import 'package:rhythm_box/services/sourced_track/enums.dart';
+import 'package:rhythm_box/services/sourced_track/exceptions.dart';
+import 'package:rhythm_box/services/sourced_track/models/source_info.dart';
+import 'package:rhythm_box/services/sourced_track/models/source_map.dart';
+import 'package:rhythm_box/services/sourced_track/sourced_track.dart';
+
+class KugouSourceInfo extends SourceInfo {
+  KugouSourceInfo({
+    required super.id,
+    required super.title,
+    required super.artist,
+    required super.thumbnail,
+    required super.pageUrl,
+    required super.duration,
+    required super.artistUrl,
+    required super.album,
+  });
+}
+
+class KugouSourcedTrack extends SourcedTrack {
+  KugouSourcedTrack({
+    required super.source,
+    required super.siblings,
+    required super.sourceInfo,
+    required super.track,
+  });
+
+  static String unescapeUrl(String src) {
+    return src.replaceAll('\\/', '/');
+  }
+
+  static String getBaseUrl() {
+    return 'http://mobilecdn.kugou.com';
+  }
+
+  static GetConnect getClient() {
+    final client = GetConnect(
+      withCredentials: true,
+      timeout: const Duration(seconds: 30),
+    );
+    client.baseUrl = getBaseUrl();
+    return client;
+  }
+
+  static Future<KugouSourcedTrack> fetchFromTrack({
+    required Track track,
+  }) async {
+    final DatabaseProvider db = Get.find();
+    final cachedSource = await (db.database.select(db.database.sourceMatchTable)
+          ..where((s) => s.trackId.equals(track.id!))
+          ..limit(1)
+          ..orderBy([
+            (s) =>
+                OrderingTerm(expression: s.createdAt, mode: OrderingMode.desc),
+          ]))
+        .get()
+        .then((s) => s.firstOrNull);
+
+    if (cachedSource == null || cachedSource.sourceType != SourceType.kugou) {
+      final siblings = await fetchSiblings(track: track);
+      if (siblings.isEmpty) {
+        throw TrackNotFoundError(track);
+      }
+
+      await db.database.into(db.database.sourceMatchTable).insert(
+            SourceMatchTableCompanion.insert(
+              trackId: track.id!,
+              sourceId: siblings.first.info.id,
+              sourceType: const Value(SourceType.kugou),
+            ),
+          );
+
+      return KugouSourcedTrack(
+        siblings: siblings.map((s) => s.info).skip(1).toList(),
+        source: siblings.first.source as SourceMap,
+        sourceInfo: siblings.first.info,
+        track: track,
+      );
+    }
+
+    return KugouSourcedTrack(
+      siblings: [],
+      source: toSourceMap(cachedSource),
+      sourceInfo: KugouSourceInfo(
+        id: cachedSource.sourceId,
+        artist: 'unknown',
+        artistUrl: '#',
+        pageUrl: '#',
+        thumbnail: '#',
+        title: 'unknown',
+        duration: Duration.zero,
+        album: 'unknown',
+      ),
+      track: track,
+    );
+  }
+
+  static SourceMap toSourceMap(dynamic manifest) {
+    const baseUrl = 'http://trackercdn.kugou.com/i/v2';
+
+    final hash = manifest is SourceMatchTableData
+        ? manifest.sourceId
+        : manifest?['hash'];
+    final key = md5.convert(utf8.encode('${hash}kgcloudv2')).toString();
+    final url =
+        '$baseUrl/song/url?key=$key&hash=$hash&appid=1005&pid=2&cmd=25&behavior=play';
+
+    return SourceMap(
+      m4a: SourceQualityMap(
+        high: url,
+        medium: url,
+        low: url,
+      ),
+      weba: SourceQualityMap(
+        high: url,
+        medium: url,
+        low: url,
+      ),
+    );
+  }
+
+  static Future<List<SiblingType>> fetchSiblings({
+    required Track track,
+  }) async {
+    final query = SourcedTrack.getSearchTerm(track);
+
+    final client = getClient();
+    final resp = await client.get(
+      '/api/v3/search/song?keyword=${Uri.encodeComponent(query)}&page=1&pagesize=10',
+    );
+    final results = jsonDecode(resp.body)['data']['info'];
+
+    // We can just trust kugou music for now
+    // If we need to check is the result correct, refer to this code
+    // https://github.com/KRTirtho/spotube/blob/9b024120601c0d381edeab4460cb22f87149d0f8/lib/services/sourced_track/sources/jiosaavn.dart#L129
+    final matchedResults = results.map(toSiblingType).toList();
+
+    return matchedResults.cast<SiblingType>();
+  }
+
+  @override
+  Future<KugouSourcedTrack> copyWithSibling() async {
+    if (siblings.isNotEmpty) {
+      return this;
+    }
+    final fetchedSiblings = await fetchSiblings(track: this);
+
+    return KugouSourcedTrack(
+      siblings: fetchedSiblings
+          .where((s) => s.info.id != sourceInfo.id)
+          .map((s) => s.info)
+          .toList(),
+      source: source,
+      sourceInfo: sourceInfo,
+      track: this,
+    );
+  }
+
+  @override
+  Future<KugouSourcedTrack?> swapWithSibling(SourceInfo sibling) async {
+    if (sibling.id == sourceInfo.id) {
+      return null;
+    }
+
+    // a sibling source that was fetched from the search results
+    final isStepSibling = siblings.none((s) => s.id == sibling.id);
+
+    final newSourceInfo = isStepSibling
+        ? sibling
+        : siblings.firstWhere((s) => s.id == sibling.id);
+    final newSiblings = siblings.where((s) => s.id != sibling.id).toList()
+      ..insert(0, sourceInfo);
+
+    final info = newSourceInfo as KugouSourceInfo;
+    final source = toSourceMap(newSourceInfo.id);
+
+    final db = Get.find<DatabaseProvider>();
+    await db.database.into(db.database.sourceMatchTable).insert(
+          SourceMatchTableCompanion.insert(
+            trackId: id!,
+            sourceId: info.id,
+            sourceType: const Value(SourceType.kugou),
+            // Because we're sorting by createdAt in the query
+            // we have to update it to indicate priority
+            createdAt: Value(DateTime.now()),
+          ),
+          mode: InsertMode.replace,
+        );
+
+    return KugouSourcedTrack(
+      siblings: newSiblings,
+      source: source,
+      sourceInfo: info,
+      track: this,
+    );
+  }
+
+  static KugouSourceInfo toSourceInfo(dynamic item) {
+    return KugouSourceInfo(
+      id: item['hash'],
+      artist: item['singername'],
+      artistUrl: '#',
+      pageUrl: '#',
+      thumbnail: unescapeUrl(item['trans_param']['union_cover'])
+          .replaceFirst('/{size}', ''),
+      title: item['songname'],
+      duration: Duration(seconds: item['duration']),
+      album: item['album_name'],
+    );
+  }
+
+  static SiblingType toSiblingType(dynamic item) {
+    final SiblingType sibling = (
+      info: toSourceInfo(item),
+      source: toSourceMap(item),
+    );
+
+    return sibling;
+  }
+}

lib/services/sourced_track/sources/netease.dart

@@ -171,7 +171,6 @@ class NeteaseSourcedTrack extends SourcedTrack {
       '/search?keywords=${Uri.encodeComponent(query)}&realIP=${NeteaseSourcedTrack.lookupRealIp()}',
     );
     if (resp.body?['code'] == 405) throw TrackNotFoundError(track);
-    print(resp.body);
     final results = resp.body['result']['songs'];
 
     // We can just trust netease music for now

lib/widgets/player/sibling_tracks.dart

@@ -13,6 +13,7 @@ import 'package:rhythm_box/services/server/active_sourced_track.dart';
 import 'package:rhythm_box/services/sourced_track/models/source_info.dart';
 import 'package:rhythm_box/services/sourced_track/models/video_info.dart';
 import 'package:rhythm_box/services/sourced_track/sourced_track.dart';
+import 'package:rhythm_box/services/sourced_track/sources/kugou.dart';
 import 'package:rhythm_box/services/sourced_track/sources/netease.dart';
 import 'package:rhythm_box/services/sourced_track/sources/piped.dart';
 import 'package:rhythm_box/services/sourced_track/sources/youtube.dart';
@@ -45,6 +46,7 @@ class _SiblingTracksState extends State<SiblingTracks> {
     YoutubeSourceInfo: 'YouTube',
     PipedSourceInfo: 'Piped',
     NeteaseSourceInfo: 'Netease',
+    KugouSourceInfo: 'Kugou',
   };
 
   List<StreamSubscription>? _subscriptions;

lib/widgets/player/track_source_details.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:rhythm_box/services/duration.dart';
 import 'package:rhythm_box/services/sourced_track/sourced_track.dart';
+import 'package:rhythm_box/services/sourced_track/sources/kugou.dart';
 import 'package:rhythm_box/services/sourced_track/sources/netease.dart';
 import 'package:rhythm_box/services/sourced_track/sources/piped.dart';
 import 'package:rhythm_box/services/sourced_track/sources/youtube.dart';
@@ -14,6 +15,7 @@ class TrackSourceDetails extends StatelessWidget {
     YoutubeSourceInfo: 'YouTube',
     PipedSourceInfo: 'Piped',
     NeteaseSourceInfo: 'Netease',
+    KugouSourceInfo: 'Kugou',
   };
 
   @override