Synchronize starred tracks with ListenBrainz 'loves'. fixes #163

INSTALL.md

@@ -106,7 +106,7 @@ You can define which authentication backend to be used thanks to the `authentica
 * `PAM`: the user/password authentication request is forwarded to PAM (see the default [PAM configuration file](conf/pam/lms) provided).
 * `http-headers`: _LMS_ uses a configurable HTTP header field, typically set by a reverse proxy to handle [SSO](https://en.wikipedia.org/wiki/Single_sign-on), to extract the login name. You can customize the field to be used using the `http-headers-login-field` option.
 __Note__: the first created user is the admin user
-### `internal` backend: reset admin password
+#### `internal` backend: reset admin password
 Open the the database file located in `/var/lms/lms.db` using `sqlite3`:
 ```sh
 sqlite3 /var/lms/lms.db

README.md

@@ -12,7 +12,9 @@ A [demo instance](http://lms-demo.poupon.dev) is available. Note the administrat
 * Audio transcode for maximum interoperability and low bandwith requirements
 * Multi-value tags: artists, genres, composers, lyricists, moods, ...
 * [MusicBrainz Identifier](https://musicbrainz.org/doc/MusicBrainz_Identifier) support to handle duplicated artist and release names
-* [ListenBrainz](https://listenbrainz.org) support for scrobbling and synchronizing listens
+* [ListenBrainz](https://listenbrainz.org) support for:
+  * Scrobbling and synchronizing listens
+  * Synchronizing 'love' feedbacks
 * Compilation support
 * Disc subtitles support
 * ReplayGain support
@@ -50,7 +52,7 @@ __Notes on the self-organizing map__:
 ## Subsonic API
 The API version implemented is 1.16.0 and has been tested on _Android_ using _Subsonic Player_, _Ultrasonic_ and _DSub_.
 
-Since _LMS_ uses metadata tags to organize music, a compatibility mode is used to navigate through the collection when using the directory browsing commands.
+Since _LMS_ uses metadata tags to organize music, a compatibility mode is used to browse the collection when using the directory browsing commands.
 
 The Subsonic API is enabled by default.
 
@@ -79,9 +81,9 @@ $setmulti(albumartistssort,%_albumartists_sort%)
 
 ## Security considerations
 _Wt_ (the web framework used) has some [built-in security measures](https://www.webtoolkit.eu/wt/features#security), but _LMS_ also has some too:
-* to mitigate brute force login attempts, _LMS_ uses an internal login throttler based on the client IP address. The `Client-IP` or `X-Forwarded-For` headers are used to determined the real IP adress, so make sure to properly configure your reverse proxy to filter or even erase the values (see example in [INSTALL.md](INSTALL.md)).
+* to mitigate brute force login attempts, _LMS_ uses an internal login throttler based on the client IP address. The `Client-IP` or `X-Forwarded-For` headers are used to determine the real IP adress, so make sure to properly configure your reverse proxy to filter or even erase the values (see example in [INSTALL.md](INSTALL.md)).
 * all passwords are stored hashed and salted using [bcrypt](https://fr.wikipedia.org/wiki/Bcrypt)
-* all the resources relative to the music collection (tracks, covers, etc.) are private to a session
+* all the resources relative to the music collection (tracks, covers, etc.) are private to an anthenticated session
 
 ## Installation
 

approot/messages_fr.xml

@@ -137,7 +137,7 @@
 <message id="Lms.Explore.various-artists">Artistes divers</message>
 
 <!--Explore:Artist-->
-<message id="Lms.Explore.Artist.appears-on">Apparitions</message>
+<message id="Lms.Explore.Artist.appears-on">Apparaît dans</message>
 <message id="Lms.Explore.Artist.similar-artists">Artistes similaires</message>
 
 <!--Explore:Artists-->

conf/lms.conf

@@ -36,10 +36,14 @@ http-server-thread-count = 0;
 
 # ListenBrainz root API
 listenbrainz-api-base-url = "https://api.listenbrainz.org";
-# How many listens to retrieve when syncing (0 disables sync)
+# How many listens to retrieve when syncing (0 to disable sync)
 listenbrainz-max-sync-listen-count = 1000;
-# How often to resync listens (0 disables sync)
+# How often to resync listens (0 to disable sync)
 listenbrainz-sync-listens-period-hours = 1;
+# How many feedbacks to retrieve when syncing (0 to disables sync)
+listenbrainz-max-sync-feedback-count = 1000;
+# How often to resync feedbacks (0 to disable sync)
+listenbrainz-sync-feedbacks-period-hours = 1;
 
 # Acousticbrainz root API
 acousticbrainz-api-base-url = "https://acousticbrainz.org";

src/libs/services/database/impl/Artist.cpp

@@ -136,7 +136,8 @@ createQuery(Session& session, const Artist::FindParameters& params)
 		assert(params.scrobbler);
 		query.join("starred_artist s_a ON s_a.artist_id = a.id")
 			.where("s_a.user_id = ?").bind(params.starringUser)
-			.where("s_a.scrobbler = ?").bind(*params.scrobbler);
+			.where("s_a.scrobbler = ?").bind(*params.scrobbler)
+			.where("s_a.scrobbling_state <> ?").bind(ScrobblingState::PendingRemove);
 	}
 
 	if (!params.clusters.empty())

src/libs/services/database/impl/Migration.cpp

@@ -571,6 +571,17 @@ CREATE TABLE IF NOT EXISTS "track_artist_link_backup" (
 		session.getDboSession().execute("ALTER TABLE track_artist_link_backup RENAME TO track_artist_link");
 	}
 
+	static
+	void
+	migrateFromV34(Session& session)
+	{
+		// Add scrobbling state
+		// By default, everythin needs to be sent
+		session.getDboSession().execute("ALTER TABLE starred_artist ADD scrobbling_state INTEGER NOT NULL DEFAULT(" + std::to_string(static_cast<int>(/*ScrobblingState::PendingAdd*/0)) + ")");
+		session.getDboSession().execute("ALTER TABLE starred_release ADD scrobbling_state INTEGER NOT NULL DEFAULT(" + std::to_string(static_cast<int>(/*ScrobblingState::PendingAdd*/0)) + ")");
+		session.getDboSession().execute("ALTER TABLE starred_track ADD scrobbling_state INTEGER NOT NULL DEFAULT(" + std::to_string(static_cast<int>(/*ScrobblingState::PendingAdd*/0)) + ")");
+	}
+
 	void
 	doDbMigration(Session& session)
 	{
@@ -611,6 +622,7 @@ CREATE TABLE IF NOT EXISTS "track_artist_link_backup" (
 			{31, migrateFromV31},
 			{32, migrateFromV32},
 			{33, migrateFromV33},
+			{34, migrateFromV34},
 		};
 
 		while (1)

src/libs/services/database/impl/Migration.hpp

@@ -26,7 +26,7 @@ namespace Database
 	class Session;
 
 	using Version = std::size_t;
-	static constexpr Version LMS_DATABASE_VERSION {34};
+	static constexpr Version LMS_DATABASE_VERSION {35};
 	class VersionInfo
 	{
 		public:

src/libs/services/database/impl/Release.cpp

@@ -64,7 +64,8 @@ createQuery(Session& session, const Release::FindParameters& params)
 		assert(params.scrobbler);
 		query.join("starred_release s_r ON s_r.release_id = r.id")
 			.where("s_r.user_id = ?").bind(params.starringUser)
-			.where("s_r.scrobbler = ?").bind(*params.scrobbler);
+			.where("s_r.scrobbler = ?").bind(*params.scrobbler)
+			.where("s_r.scrobbling_state <> ?").bind(ScrobblingState::PendingRemove);
 	}
 
 	if (params.artist.isValid())

src/libs/services/database/impl/StarredArtist.cpp

@@ -22,6 +22,7 @@
 #include <Wt/Dbo/WtSqlTraits.h>
 
 #include "services/database/Artist.hpp"
+#include "services/database/Session.hpp"
 #include "services/database/User.hpp"
 #include "IdTypeTraits.hpp"
 #include "Utils.hpp"

src/libs/services/database/impl/StarredRelease.cpp

@@ -22,6 +22,7 @@
 #include <Wt/Dbo/WtSqlTraits.h>
 
 #include "services/database/Release.hpp"
+#include "services/database/Session.hpp"
 #include "services/database/User.hpp"
 #include "IdTypeTraits.hpp"
 #include "Utils.hpp"

src/libs/services/database/impl/StarredTrack.cpp

@@ -22,6 +22,7 @@
 #include <Wt/Dbo/WtSqlTraits.h>
 
 #include "services/database/Track.hpp"
+#include "services/database/Session.hpp"
 #include "services/database/User.hpp"
 #include "IdTypeTraits.hpp"
 #include "Utils.hpp"
@@ -60,6 +61,23 @@ namespace Database
 			.resultValue();
 	}
 
+	RangeResults<StarredTrackId>
+	StarredTrack::find(Session& session, const FindParameters& params)
+	{
+		session.checkSharedLocked();
+
+		auto query {session.getDboSession().query<StarredTrackId>("SELECT DISTINCT s_t.id FROM starred_track s_t")};
+
+		if (params.scrobbler)
+			query.where("s_t.scrobbler = ?").bind(*params.scrobbler);
+		if (params.scrobblingState)
+			query.where("s_t.scrobbling_state = ?").bind(*params.scrobblingState);
+		if (params.user.isValid())
+			query.where("s_t.user_id = ?").bind(params.user);
+
+		return execQuery(query, params.range);
+	}
+
 	StarredTrack::pointer
 	StarredTrack::create(Session& session, ObjectPtr<Track> track, ObjectPtr<User> user, Scrobbler scrobbler)
 	{

src/libs/services/database/impl/Track.cpp

@@ -56,7 +56,8 @@ createQuery(Session& session, const Track::FindParameters& params)
 		assert(params.scrobbler);
 		query.join("starred_track s_t ON s_t.track_id = t.id")
 			.where("s_t.user_id = ?").bind(params.starringUser)
-			.where("s_t.scrobbler = ?").bind(*params.scrobbler);
+			.where("s_t.scrobbler = ?").bind(*params.scrobbler)
+			.where("s_t.scrobbling_state <> ?").bind(ScrobblingState::PendingRemove);
 	}
 
 	if (!params.clusters.empty())

src/libs/services/database/include/services/database/StarredArtist.hpp

@@ -23,14 +23,11 @@
 #include <Wt/Dbo/Dbo.h>
 
 #include "services/database/ArtistId.hpp"
-#include "services/database/IdType.hpp"
 #include "services/database/Object.hpp"
-#include "services/database/Session.hpp"
+#include "services/database/StarredArtistId.hpp"
 #include "services/database/Types.hpp"
 #include "services/database/UserId.hpp"
 
-LMS_DECLARE_IDTYPE(StarredArtistId)
-
 namespace Database
 {
 	class Artist;
@@ -56,14 +53,17 @@ namespace Database
 			ObjectPtr<User>		getUser() const { return _user; }
 			Scrobbler			getScrobbler() const { return _scrobbler; }
 			const Wt::WDateTime& getDateTime() const { return _dateTime; }
+			ScrobblingState		getScrobblingState() const { return _scrobblingState; }
 
 			// Setters
 			void setDateTime(const Wt::WDateTime& dateTime);
+			void setScrobblingState(ScrobblingState state) { _scrobblingState  = state; }
 
 			template<class Action>
 			void persist(Action& a)
 			{
 				Wt::Dbo::field(a,	_scrobbler,			"scrobbler");
+				Wt::Dbo::field(a,	_scrobblingState,	"scrobbling_state");
 				Wt::Dbo::field(a,	_dateTime,			"date_time");
 
 				Wt::Dbo::belongsTo(a,	_artist,	"artist",	Wt::Dbo::OnDeleteCascade);
@@ -72,6 +72,7 @@ namespace Database
 
 		private:
 			Scrobbler		_scrobbler;			// for which scrobbler
+			ScrobblingState	_scrobblingState {ScrobblingState::PendingAdd};
 			Wt::WDateTime	_dateTime;			// when it was starred
 
 			Wt::Dbo::ptr<Artist>	_artist;

src/libs/services/database/include/services/database/StarredArtistId.hpp

@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2022 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LMS is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "services/database/IdType.hpp"
+
+LMS_DECLARE_IDTYPE(StarredArtistId)
+

src/libs/services/database/include/services/database/StarredRelease.hpp

@@ -22,15 +22,12 @@
 #include <Wt/WDateTime.h>
 #include <Wt/Dbo/Dbo.h>
 
-#include "services/database/ReleaseId.hpp"
-#include "services/database/IdType.hpp"
 #include "services/database/Object.hpp"
-#include "services/database/Session.hpp"
+#include "services/database/ReleaseId.hpp"
+#include "services/database/StarredReleaseId.hpp"
 #include "services/database/Types.hpp"
 #include "services/database/UserId.hpp"
 
-LMS_DECLARE_IDTYPE(StarredReleaseId)
-
 namespace Database
 {
 	class Release;
@@ -56,14 +53,17 @@ namespace Database
 			ObjectPtr<User>		getUser() const { return _user; }
 			Scrobbler			getScrobbler() const { return _scrobbler; }
 			const Wt::WDateTime& getDateTime() const { return _dateTime; }
+			ScrobblingState		getScrobblingState() const { return _scrobblingState; }
 
 			// Setters
 			void setDateTime(const Wt::WDateTime& dateTime);
+			void setScrobblingState(ScrobblingState state) { _scrobblingState  = state; }
 
 			template<class Action>
 			void persist(Action& a)
 			{
 				Wt::Dbo::field(a,	_scrobbler,			"scrobbler");
+				Wt::Dbo::field(a,	_scrobblingState,	"scrobbling_state");
 				Wt::Dbo::field(a,	_dateTime,			"date_time");
 
 				Wt::Dbo::belongsTo(a,	_release,	"release",	Wt::Dbo::OnDeleteCascade);
@@ -72,6 +72,7 @@ namespace Database
 
 		private:
 			Scrobbler		_scrobbler;			// for which scrobbler
+			ScrobblingState	_scrobblingState {ScrobblingState::PendingAdd};
 			Wt::WDateTime	_dateTime;			// when it was starred
 
 			Wt::Dbo::ptr<Release>	_release;

src/libs/services/database/include/services/database/StarredReleaseId.hpp

@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2022 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LMS is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "services/database/IdType.hpp"
+
+LMS_DECLARE_IDTYPE(StarredReleaseId)
+

src/libs/services/database/include/services/database/StarredTrack.hpp

@@ -23,13 +23,11 @@
 #include <Wt/Dbo/Dbo.h>
 
 #include "services/database/TrackId.hpp"
-#include "services/database/IdType.hpp"
 #include "services/database/Object.hpp"
-#include "services/database/Session.hpp"
+#include "services/database/StarredTrackId.hpp"
 #include "services/database/Types.hpp"
 #include "services/database/UserId.hpp"
-
+#include "utils/EnumSet.hpp"
-LMS_DECLARE_IDTYPE(StarredTrackId)
 
 namespace Database
 {
@@ -43,10 +41,23 @@ namespace Database
 			StarredTrack() = default;
 			StarredTrack(ObjectPtr<Track> track, ObjectPtr<User> user, Scrobbler scrobbler);
 
+			struct FindParameters
+			{
+				std::optional<Scrobbler>    	scrobbler;      	// for this scrobbler
+				std::optional<ScrobblingState>	scrobblingState;	//   and these states
+				UserId							user;				// and this user
+				Range							range;
+
+				FindParameters& setScrobbler(Scrobbler _scrobbler, ScrobblingState _scrobblingState) { scrobbler = _scrobbler; scrobblingState = _scrobblingState; return *this; }
+				FindParameters& setUser(UserId _user) {user = _user; return *this; }
+				FindParameters& setRange(Range _range) {range = _range; return *this; }
+			};
+
 			// Search utility
 			static std::size_t	getCount(Session& session);
 			static pointer		find(Session& session, StarredTrackId id);
 			static pointer		find(Session& session, TrackId trackId, UserId userId, Scrobbler scrobbler);
+			static RangeResults<StarredTrackId>	find(Session& session, const FindParameters& findParams);
 
 			// Create utility
 			static pointer		create(Session& session, ObjectPtr<Track> track, ObjectPtr<User> user, Scrobbler scrobbler);
@@ -56,14 +67,17 @@ namespace Database
 			ObjectPtr<User>		getUser() const { return _user; }
 			Scrobbler			getScrobbler() const { return _scrobbler; }
 			const Wt::WDateTime& getDateTime() const { return _dateTime; }
+			ScrobblingState		getScrobblingState() const { return _scrobblingState; }
 
 			// Setters
 			void setDateTime(const Wt::WDateTime& dateTime);
+			void setScrobblingState(ScrobblingState state) { _scrobblingState  = state; }
 
 			template<class Action>
 			void persist(Action& a)
 			{
 				Wt::Dbo::field(a,	_scrobbler,			"scrobbler");
+				Wt::Dbo::field(a,	_scrobblingState,	"scrobbling_state");
 				Wt::Dbo::field(a,	_dateTime,			"date_time");
 
 				Wt::Dbo::belongsTo(a,	_track,		"track",	Wt::Dbo::OnDeleteCascade);
@@ -72,6 +86,7 @@ namespace Database
 
 		private:
 			Scrobbler		_scrobbler;			// for which scrobbler
+			ScrobblingState	_scrobblingState {ScrobblingState::PendingAdd};
 			Wt::WDateTime	_dateTime;			// when it was starred
 
 			Wt::Dbo::ptr<Track>		_track;

src/libs/services/database/include/services/database/StarredTrackId.hpp

@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2022 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LMS is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "services/database/IdType.hpp"
+
+LMS_DECLARE_IDTYPE(StarredTrackId)
+

src/libs/services/database/test/StarredArtist.cpp

@@ -64,6 +64,24 @@ TEST_F(DatabaseFixture, StarredArtist)
 	}
 }
 
+TEST_F(DatabaseFixture, StarredArtist_PendingDestroy)
+{
+	ScopedArtist artist {session, "MyArtist"};
+	ScopedUser user {session, "MyUser"};
+	ScopedStarredArtist starredArtist {session, artist.lockAndGet(), user.lockAndGet(), Scrobbler::Internal};
+
+	{
+		auto transaction {session.createUniqueTransaction()};
+
+		auto artists {Artist::find(session, Artist::FindParameters {}.setStarringUser(user.getId(), Scrobbler::Internal))};
+		EXPECT_EQ(artists.results.size(), 1);
+
+		starredArtist.get().modify()->setScrobblingState(ScrobblingState::PendingRemove);
+		artists = Artist::find(session, Artist::FindParameters {}.setStarringUser(user.getId(), Scrobbler::Internal));
+		EXPECT_EQ(artists.results.size(), 0);
+	}
+}
+
 TEST_F(DatabaseFixture, StarredArtist_dateTime)
 {
 	ScopedArtist artist1 {session, "MyArtist1"};

src/libs/services/database/test/StarredRelease.cpp

@@ -64,6 +64,24 @@ TEST_F(DatabaseFixture, StarredRelease)
 	}
 }
 
+TEST_F(DatabaseFixture, Starredrelease_PendingDestroy)
+{
+	ScopedRelease release {session, "MyRelease"};
+	ScopedUser user {session, "MyUser"};
+	ScopedStarredRelease starredRelease {session, release.lockAndGet(), user.lockAndGet(), Scrobbler::Internal};
+
+	{
+		auto transaction {session.createUniqueTransaction()};
+
+		auto releases {Release::find(session, Release::FindParameters {}.setStarringUser(user.getId(), Scrobbler::Internal))};
+		EXPECT_EQ(releases.results.size(), 1);
+
+		starredRelease.get().modify()->setScrobblingState(ScrobblingState::PendingRemove);
+		releases = Release::find(session, Release::FindParameters {}.setStarringUser(user.getId(), Scrobbler::Internal));
+		EXPECT_EQ(releases.results.size(), 0);
+	}
+}
+
 TEST_F(DatabaseFixture, StarredRelease_dateTime)
 {
 	ScopedRelease release1 {session, "MyRelease1"};

src/libs/services/database/test/StarredTrack.cpp

@@ -64,6 +64,24 @@ TEST_F(DatabaseFixture, StarredTrack)
 	}
 }
 
+TEST_F(DatabaseFixture, Starredtrack_PendingDestroy)
+{
+	ScopedTrack track {session, "MyTrack"};
+	ScopedUser user {session, "MyUser"};
+	ScopedStarredTrack starredTrack {session, track.lockAndGet(), user.lockAndGet(), Scrobbler::Internal};
+
+	{
+		auto transaction {session.createUniqueTransaction()};
+
+		auto tracks {Track::find(session, Track::FindParameters {}.setStarringUser(user.getId(), Scrobbler::Internal))};
+		EXPECT_EQ(tracks.results.size(), 1);
+
+		starredTrack.get().modify()->setScrobblingState(ScrobblingState::PendingRemove);
+		tracks = Track::find(session, Track::FindParameters {}.setStarringUser(user.getId(), Scrobbler::Internal));
+		EXPECT_EQ(tracks.results.size(), 0);
+	}
+}
+
 TEST_F(DatabaseFixture, StarredTrack_dateTime)
 {
 	ScopedTrack track1 {session, "MyTrack1"};

src/libs/services/scrobbling/CMakeLists.txt

@@ -1,6 +1,7 @@
 
 add_library(lmsscrobbling SHARED
 	impl/internal/InternalScrobbler.cpp
+	impl/listenbrainz/FeedbacksSynchronizer.cpp
 	impl/listenbrainz/ListenBrainzScrobbler.cpp
 	impl/listenbrainz/ListensSynchronizer.cpp
 	impl/listenbrainz/Utils.cpp

src/libs/services/scrobbling/impl/IScrobbler.hpp

@@ -23,9 +23,9 @@
 #include <memory>
 #include <optional>
 
-#include "services/database/ArtistId.hpp"
+#include "services/database/StarredArtistId.hpp"
-#include "services/database/ReleaseId.hpp"
+#include "services/database/StarredReleaseId.hpp"
-#include "services/database/TrackListId.hpp"
+#include "services/database/StarredTrackId.hpp"
 #include "services/scrobbling/Listen.hpp"
 
 namespace Database
@@ -47,16 +47,13 @@ namespace Scrobbling
 			virtual void listenFinished(const Listen& listen, std::optional<std::chrono::seconds> duration) = 0;
 			virtual void addTimedListen(const TimedListen& listen) = 0;
 
-			// Feedback
+			// Feedbacks
- 			virtual void onStarred(Database::UserId, Database::ArtistId) {};
+ 			virtual void onStarred(Database::StarredArtistId) = 0;
- 			virtual void onUnstarred(Database::UserId, Database::ArtistId) {};
+ 			virtual void onUnstarred(Database::StarredArtistId) = 0;
- 			virtual void onStarred(Database::UserId, Database::ReleaseId) {};
+ 			virtual void onStarred(Database::StarredReleaseId) = 0;
- 			virtual void onUnstarred(Database::UserId, Database::ReleaseId) {};
+ 			virtual void onUnstarred(Database::StarredReleaseId) = 0;
- 			virtual void onStarred(Database::UserId, Database::TrackId) {};
+ 			virtual void onStarred(Database::StarredTrackId) = 0;
- 			virtual void onUnstarred(Database::UserId, Database::TrackId) {};
+ 			virtual void onUnstarred(Database::StarredTrackId) = 0;
-
-//			virtual void star(Database::TrackId trackId) = 0;
-//			virtual void unstar(Database::TrackId trackId) = 0;
 	};
 
 	std::unique_ptr<IScrobbler> createScrobbler(std::string_view backendName);

src/libs/services/scrobbling/impl/ScrobblingService.impl.hpp

@@ -35,6 +35,7 @@ namespace Scrobbling
 		if (!scrobbler)
 			return;
 
+		typename StarredObjType::IdType starredObjId;
 		{
 			Session& session {_db.getTLSSession()};
 			auto transaction {session.createUniqueTransaction()};
@@ -53,8 +54,9 @@ namespace Scrobbling
 				starredObj = StarredObjType::create(session, obj, user, *scrobbler);
 			}
 			starredObj.modify()->setDateTime(Wt::WDateTime::currentDateTime());
+			starredObjId = starredObj->getId();
 		}
-		_scrobblers[*scrobbler]->onStarred(userId, objId);
+		_scrobblers[*scrobbler]->onStarred(starredObjId);
 	}
 
 	template <typename ObjType, typename ObjIdType, typename StarredObjType>
@@ -65,14 +67,18 @@ namespace Scrobbling
 		if (!scrobbler)
 			return;
 
+		typename StarredObjType::IdType starredObjId;
 		{
 			Session& session {_db.getTLSSession()};
-			auto transaction {session.createUniqueTransaction()};
+			auto transaction {session.createSharedTransaction()};
 
-			if (typename StarredObjType::pointer starredObj {StarredObjType::find(session, objId, userId, *scrobbler)})
+			typename StarredObjType::pointer starredObj {StarredObjType::find(session, objId, userId, *scrobbler)};
-				starredObj.remove();
+			if (!starredObj)
+				return;
+
+			starredObjId = starredObj->getId();
 		}
-		_scrobblers[*scrobbler]->onUnstarred(userId, objId);
+		_scrobblers[*scrobbler]->onUnstarred(starredObjId);
 	}
 
 	template <typename ObjType, typename ObjIdType, typename StarredObjType>
@@ -86,7 +92,8 @@ namespace Scrobbling
 		Session& session {_db.getTLSSession()};
 		auto transaction {session.createSharedTransaction()};
 
-		return StarredObjType::find(session, objId, userId, *scrobbler);
+		typename StarredObjType::pointer starredObj {StarredObjType::find(session, objId, userId, *scrobbler)};
+		return starredObj && (starredObj->getScrobblingState() != ScrobblingState::PendingRemove);
 	}
 
 } // ns Scrobbling

src/libs/services/scrobbling/impl/internal/InternalScrobbler.cpp

@@ -22,8 +22,32 @@
 #include "services/database/Db.hpp"
 #include "services/database/Listen.hpp"
 #include "services/database/Session.hpp"
-#include "services/database/User.hpp"
+#include "services/database/StarredArtist.hpp"
+#include "services/database/StarredRelease.hpp"
+#include "services/database/StarredTrack.hpp"
 #include "services/database/Track.hpp"
+#include "services/database/User.hpp"
+
+namespace
+{
+	template <typename StarredObjType>
+	void onStarred(Database::Session& session, typename StarredObjType::IdType id)
+	{
+		auto transaction {session.createUniqueTransaction()};
+
+		if (auto starredObj {StarredObjType::find(session, id)})
+			starredObj.modify()->setScrobblingState(Database::ScrobblingState::Synchronized);
+	}
+
+	template <typename StarredObjType>
+	void onUnstarred(Database::Session& session, typename StarredObjType::IdType id)
+	{
+		auto transaction {session.createUniqueTransaction()};
+
+		if (auto starredObj {StarredObjType::find(session, id)})
+			starredObj.remove();
+	}
+}
 
 namespace Scrobbling
 {
@@ -67,5 +91,40 @@ namespace Scrobbling
 		auto dbListen {Database::Listen::create(session, user, track, Database::Scrobbler::Internal, listen.listenedAt)};
 		dbListen.modify()->setScrobblingState(Database::ScrobblingState::Synchronized);
 	}
+
+	void
+	InternalScrobbler::onStarred(Database::StarredArtistId starredArtistId)
+	{
+		::onStarred<Database::StarredArtist>(_db.getTLSSession(), starredArtistId);
+	}
+
+	void
+	InternalScrobbler::onUnstarred(Database::StarredArtistId starredArtistId)
+	{
+		::onUnstarred<Database::StarredArtist>(_db.getTLSSession(), starredArtistId);
+	}
+
+ 	void
+	InternalScrobbler::onStarred(Database::StarredReleaseId starredReleaseId)
+	{
+		::onStarred<Database::StarredRelease>(_db.getTLSSession(), starredReleaseId);
+	}
+
+	void InternalScrobbler::onUnstarred(Database::StarredReleaseId starredReleaseId)
+	{
+		::onUnstarred<Database::StarredRelease>(_db.getTLSSession(), starredReleaseId);
+	}
+
+ 	void
+	InternalScrobbler::onStarred(Database::StarredTrackId starredTrackId)
+	{
+		::onStarred<Database::StarredTrack>(_db.getTLSSession(), starredTrackId);
+	}
+
+	void
+	InternalScrobbler::onUnstarred(Database::StarredTrackId starredTrackId)
+	{
+		::onUnstarred<Database::StarredTrack>(_db.getTLSSession(), starredTrackId);
+	}
 } // Scrobbling
 

src/libs/services/scrobbling/impl/internal/InternalScrobbler.hpp

@@ -39,6 +39,13 @@ namespace Scrobbling
 			void listenFinished(const Listen& listen, std::optional<std::chrono::seconds> duration) override;
 			void addTimedListen(const TimedListen& listen) override;
 
+			void onStarred(Database::StarredArtistId) override;
+ 			void onUnstarred(Database::StarredArtistId) override;
+ 			void onStarred(Database::StarredReleaseId) override;
+ 			void onUnstarred(Database::StarredReleaseId) override;
+ 			void onStarred(Database::StarredTrackId) override;
+ 			void onUnstarred(Database::StarredTrackId) override;
+
 			Database::Db&			_db;
 	};
 } // Scrobbling

src/libs/services/scrobbling/impl/listenbrainz/FeedbackTypes.hpp

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2022 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LMS is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "utils/UUID.hpp"
+
+namespace Scrobbling::ListenBrainz
+{
+	// See https://listenbrainz.readthedocs.io/en/production/dev/feedback-json/#feedback-json-doc
+	enum class FeedbackType
+	{
+		Love = 1,
+		Hate = -1,
+		Erase = 0,
+	};
+
+	struct Feedback
+	{
+		Wt::WDateTime	created;
+		UUID			recordingMBID;
+		FeedbackType	score;
+	};
+} // Scrobbling::ListenBrainz

src/libs/services/scrobbling/impl/listenbrainz/FeedbacksSynchronizer.cpp

@@ -0,0 +1,588 @@
+/*
+ * Copyright (C) 2021 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LMS is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "ListenBrainzScrobbler.hpp"
+
+#include <boost/asio/bind_executor.hpp>
+#include <Wt/Json/Array.h>
+#include <Wt/Json/Object.h>
+#include <Wt/Json/Value.h>
+#include <Wt/Json/Serializer.h>
+
+#include "services/database/Db.hpp"
+#include "services/database/Session.hpp"
+#include "services/database/StarredTrack.hpp"
+#include "services/database/Track.hpp"
+#include "services/database/User.hpp"
+#include "services/scrobbling/Exception.hpp"
+#include "utils/IConfig.hpp"
+#include "utils/http/IClient.hpp"
+#include "utils/Service.hpp"
+
+#include "Utils.hpp"
+
+using namespace Scrobbling::ListenBrainz;
+using namespace Database;
+
+namespace
+{
+
+	class Exception : public Scrobbling::Exception
+	{
+		public:
+			using Scrobbling::Exception::Exception;
+	};
+
+	class ParseErrorException : public Exception
+	{
+		public:
+			using Exception::Exception;
+	};
+
+	class MBIDNotFoundException : public Exception
+	{
+		public:
+			MBIDNotFoundException() : Exception {"MBID not found"} {}
+	};
+
+	std::optional<std::size_t>
+	parseTotalFeedbackCount(std::string_view msgBody)
+	{
+		try
+		{
+			Wt::Json::Object root;
+			Wt::Json::parse(std::string {msgBody}, root);
+
+			return static_cast<int>(root.get("total_count"));
+		}
+		catch (const Wt::WException& e)
+		{
+			LOG(ERROR) << "Cannot parse listen count response: " << e.what();
+			return std::nullopt;
+		}
+	}
+
+	Feedback
+	parseFeedback(const Wt::Json::Object& feedbackObj)
+	{
+		try
+		{
+			const std::optional<UUID> recordingMBID {UUID::fromString(static_cast<std::string>(feedbackObj.get("recording_mbid")))};
+			if (!recordingMBID)
+				throw MBIDNotFoundException {};
+
+			return Feedback
+			{
+				Wt::WDateTime::fromTime_t(static_cast<int>(feedbackObj.get("created"))),
+				*recordingMBID,
+				static_cast<FeedbackType>(static_cast<int>(feedbackObj.get("score")))
+			};
+		}
+		catch (const Wt::WException& e)
+		{
+			LOG(DEBUG) << "Cannot parse feedback: " << e.what();
+			throw Exception {};
+		}
+	}
+
+	struct GetFeedbacksResult
+	{
+		std::size_t totalFeedbackCount{};
+		std::vector<Feedback> feedbacks;
+	};
+
+	GetFeedbacksResult
+	parseGetFeedbacks(std::string_view msgBody)
+	{
+		GetFeedbacksResult res;
+
+		try
+		{
+			Wt::Json::Object root;
+			Wt::Json::parse(std::string {msgBody}, root);
+
+			const Wt::Json::Array& feedbacks = root.get("feedback");
+
+			LOG(DEBUG) << "Got " << feedbacks.size() << " feedbacks";
+
+			if (feedbacks.empty())
+				return res;
+
+			res.totalFeedbackCount += feedbacks.size();
+
+			for (const Wt::Json::Value& value : feedbacks)
+			{
+				try
+				{
+					res.feedbacks.push_back(parseFeedback(value));
+				}
+				catch (const Exception &e)
+				{
+					LOG(DEBUG) << "Cannot parse feedback: " << e.what() << ", skipping";
+				}
+			}
+		}
+		catch (const Wt::WException& error)
+		{
+			LOG(ERROR) << "Cannot parse 'get-feedback' result: " << error.what();
+			throw ParseErrorException {error.what()};
+		}
+
+		return res;
+	}
+}
+
+namespace Scrobbling::ListenBrainz
+{
+	FeedbacksSynchronizer::FeedbacksSynchronizer(boost::asio::io_context& ioContext, Database::Db& db, Http::IClient& client)
+		: _ioContext {ioContext}
+		, _db {db}
+		, _client {client}
+		, _maxSyncFeedbackCount {Service<IConfig>::get()->getULong("listenbrainz-max-sync-feedback-count", 1000)}
+		, _syncFeedbacksPeriod {Service<IConfig>::get()->getULong("listenbrainz-sync-feedbacks-period-hours", 1)}
+	{
+		LOG(INFO) << "Starting Feedbacks synchronizer, maxSyncFeedbackCount = " << _maxSyncFeedbackCount << ", _syncFeedbacksPeriod = " << _syncFeedbacksPeriod.count() << " hours";
+
+		scheduleSync(std::chrono::seconds {30});
+	}
+
+	void
+	FeedbacksSynchronizer::enqueFeedback(FeedbackType type, Database::StarredTrackId starredTrackId)
+	{
+		try
+		{
+			Database::Session& session {_db.getTLSSession()};
+
+			auto transaction {session.createUniqueTransaction()};
+
+			StarredTrack::pointer starredTrack {StarredTrack::find(session, starredTrackId)};
+			if (!starredTrack)
+				return;
+
+			std::optional<UUID> recordingMBID {starredTrack->getTrack()->getRecordingMBID()};
+
+			switch (type)
+			{
+				case FeedbackType::Love:
+				starredTrack.modify()->setScrobblingState(ScrobblingState::PendingAdd);
+				break;
+
+				case FeedbackType::Erase:
+				if (!recordingMBID)
+				{
+					LOG(DEBUG) << "Track has no recording MBID: erasing star";
+					starredTrack.remove();
+				}
+				else
+				{
+					// Send the erase order even if it is not on the remote LB server (it may be
+					// queued for add, or not)
+					starredTrack.modify()->setScrobblingState(ScrobblingState::PendingRemove);
+				}
+				break;
+
+			default:
+				throw Exception {"Unhandled feedback type"};
+			}
+
+			const std::optional<UUID> listenBrainzToken {starredTrack->getUser()->getListenBrainzToken()};
+			if (!listenBrainzToken)
+				return;
+
+			Http::ClientPOSTRequestParameters request;
+			request.relativeUrl = "/1/feedback/recording-feedback";
+			request.message.addHeader("Authorization", "Token " + std::string {listenBrainzToken->getAsString()});
+
+			Wt::Json::Object root;
+			root["recording_mbid"] = Wt::Json::Value {std::string {recordingMBID->getAsString()}};
+			root["score"] = Wt::Json::Value {static_cast<int>(type)};
+
+			request.message.addBodyText(Wt::Json::serialize(root));
+			request.message.addHeader("Content-Type", "application/json");
+
+			request.onSuccessFunc = [=](std::string_view /*msgBody*/)
+			{
+				_strand.dispatch([=]
+				{
+					onFeedbackSent(type, starredTrackId);
+				});
+			};
+			_client.sendPOSTRequest(std::move(request));
+		}
+		catch (Exception& e)
+		{
+			LOG(DEBUG) << "Cannot send feedback: " << e.what();
+		}
+	}
+
+	void
+	FeedbacksSynchronizer::onFeedbackSent(FeedbackType type, Database::StarredTrackId starredTrackId)
+	{
+		assert(_strand.running_in_this_thread());
+
+		Session& session {_db.getTLSSession()};
+		auto transaction {session.createUniqueTransaction()};
+
+		StarredTrack::pointer starredTrack {StarredTrack::find(session, starredTrackId)};
+		if (!starredTrack)
+		{
+			LOG(DEBUG) << "Starred track not found. deleted?";
+			return;
+		}
+
+		UserContext& userContext {getUserContext(starredTrack->getUser()->getId())};
+
+		switch (type)
+		{
+			case FeedbackType::Love:
+				starredTrack.modify()->setScrobblingState(ScrobblingState::Synchronized);
+				LOG(DEBUG) << "State set to synchronized";
+
+				if (userContext.feedbackCount)
+				{
+					(*userContext.feedbackCount)++;
+					LOG(DEBUG) << "Feedback count set to " << *userContext.feedbackCount << " for user '" << userContext.listenBrainzUserName <<"'";
+				}
+				break;
+
+			case FeedbackType::Erase:
+				starredTrack.remove();
+				LOG(DEBUG) << "Removed starred track";
+
+				if (userContext.feedbackCount && *userContext.feedbackCount > 0)
+				{
+					(*userContext.feedbackCount)--;
+					LOG(DEBUG) << "Feedback count set to " << *userContext.feedbackCount << " for user '" << userContext.listenBrainzUserName <<"'";
+				}
+				break;
+
+			default:
+				throw Exception {"Unhandled feedback type"};
+		}
+	}
+
+	void
+	FeedbacksSynchronizer::enquePendingFeedbacks()
+	{
+		auto processPendingFeedbacks { [this] (ScrobblingState scrobblingState, FeedbackType feedbackType)
+		{
+			RangeResults<StarredTrackId> pendingFeedbacks;
+
+			{
+				Database::Session& session {_db.getTLSSession()};
+
+				auto transaction {session.createSharedTransaction()};
+
+				StarredTrack::FindParameters params;
+				params.setScrobbler(Database::Scrobbler::ListenBrainz, scrobblingState)
+						.setRange(Database::Range {0, 100}); // don't flood too much?
+
+				pendingFeedbacks = StarredTrack::find(session, params);
+			}
+
+			LOG(DEBUG) << "Queing " << pendingFeedbacks.results.size() << " pending '" << (feedbackType == FeedbackType::Love ? "love" : "erase") << "'feedbacks";
+
+			for (const StarredTrackId starredTrackId : pendingFeedbacks.results)
+				enqueFeedback(feedbackType, starredTrackId);
+		}};
+
+		processPendingFeedbacks(ScrobblingState::PendingAdd, FeedbackType::Love);
+		processPendingFeedbacks(ScrobblingState::PendingRemove, FeedbackType::Erase);
+	}
+
+	FeedbacksSynchronizer::UserContext&
+	FeedbacksSynchronizer::getUserContext(Database::UserId userId)
+	{
+		assert(_strand.running_in_this_thread());
+
+		auto itContext {_userContexts.find(userId)};
+		if (itContext == std::cend(_userContexts))
+		{
+			auto [itNewContext, inserted] {_userContexts.emplace(userId, userId)};
+			itContext = itNewContext;
+		}
+
+		return itContext->second;
+	}
+
+	bool
+	FeedbacksSynchronizer::isSyncing() const
+	{
+		return std::any_of(std::cbegin(_userContexts), std::cend(_userContexts), [](const auto& contextEntry)
+				{
+					const auto& [userId, context] {contextEntry};
+					return context.syncing;
+				});
+	}
+
+	void
+	FeedbacksSynchronizer::scheduleSync(std::chrono::seconds fromNow)
+	{
+		if (_syncFeedbacksPeriod.count() == 0 || _maxSyncFeedbackCount == 0)
+			return;
+
+		LOG(DEBUG) << "Scheduled sync in " << fromNow.count() << " seconds...";
+		_syncTimer.expires_after(fromNow);
+		_syncTimer.async_wait(boost::asio::bind_executor(_strand, [this] (const boost::system::error_code& ec)
+		{
+			if (ec == boost::asio::error::operation_aborted)
+			{
+				LOG(DEBUG) << "getFeedbacks aborted";
+				return;
+			}
+			else if (ec)
+			{
+				throw Exception {"GetFeedbacks timer failure: " + std::string {ec.message()} };
+			}
+
+			startSync();
+		}));
+	}
+
+	void
+	FeedbacksSynchronizer::startSync()
+	{
+		LOG(DEBUG) << "Starting sync!";
+
+		assert(!isSyncing());
+		assert(_strand.running_in_this_thread());
+
+		enquePendingFeedbacks();
+
+		Database::RangeResults<Database::UserId> userIds;
+		{
+			Database::Session& session {_db.getTLSSession()};
+			auto transaction {session.createSharedTransaction()};
+			userIds = Database::User::find(_db.getTLSSession(), Database::User::FindParameters{}.setScrobbler(Database::Scrobbler::ListenBrainz));
+		}
+
+		for (const Database::UserId userId : userIds.results)
+			startSync(getUserContext(userId));
+
+		if (!isSyncing())
+			scheduleSync(_syncFeedbacksPeriod);
+	}
+
+	void
+	FeedbacksSynchronizer::startSync(UserContext& context)
+	{
+		context.syncing = true;
+		context.listenBrainzUserName = "";
+		context.fetchedFeedbackCount = 0;
+		context.matchedFeedbackCount = 0;
+		context.importedFeedbackCount = 0;
+
+		enqueValidateToken(context);
+	}
+
+	void
+	FeedbacksSynchronizer::onSyncEnded(UserContext& context)
+	{
+		_strand.dispatch([this, &context]
+		{
+			LOG(INFO) << "Feedback sync done for user '" << context.listenBrainzUserName << "', fetched: " << context.fetchedFeedbackCount << ", matched: " << context.matchedFeedbackCount << ", imported: " << context.importedFeedbackCount;
+			context.syncing = false;
+
+			if (!isSyncing())
+				scheduleSync(_syncFeedbacksPeriod);
+		});
+	}
+
+	void
+	FeedbacksSynchronizer::enqueValidateToken(UserContext& context)
+	{
+		assert(context.listenBrainzUserName.empty());
+
+		const std::optional<UUID> listenBrainzToken {Utils::getListenBrainzToken(_db.getTLSSession(), context.userId)};
+		if (!listenBrainzToken)
+		{
+			onSyncEnded(context);
+			return;
+		}
+
+		Http::ClientGETRequestParameters request;
+		request.priority = Http::ClientRequestParameters::Priority::Low;
+		request.relativeUrl = "/1/validate-token";
+		request.headers = { {"Authorization",  "Token " + std::string {listenBrainzToken->getAsString()}} };
+		request.onSuccessFunc = [this, &context] (std::string_view msgBody)
+			{
+				context.listenBrainzUserName = Utils::parseValidateToken(msgBody);
+				if (context.listenBrainzUserName.empty())
+				{
+					onSyncEnded(context);
+					return;
+				}
+				enqueGetFeedbackCount(context);
+			};
+		request.onFailureFunc = [this, &context]
+			{
+				onSyncEnded(context);
+			};
+
+		_client.sendGETRequest(std::move(request));
+	}
+
+	void
+	FeedbacksSynchronizer::enqueGetFeedbackCount(UserContext& context)
+	{
+		assert(!context.listenBrainzUserName.empty());
+
+		Http::ClientGETRequestParameters request;
+		request.relativeUrl = "/1/feedback/user/" + std::string {context.listenBrainzUserName} + "/get-feedback?score=1&count=0";
+		request.priority = Http::ClientRequestParameters::Priority::Low;
+		request.onSuccessFunc = [this, &context] (std::string_view msgBody)
+			{
+				std::string msgBodyCopy {msgBody};
+				_strand.dispatch([this, msgBodyCopy, &context]
+				{
+					LOG(DEBUG) << "Current feedback count = " << (context.feedbackCount ? *context.feedbackCount : 0) << " for user '" << context.listenBrainzUserName << "'";
+
+					const auto totalFeedbackCount = parseTotalFeedbackCount(msgBodyCopy);
+					if (totalFeedbackCount)
+						LOG(DEBUG) << "Feedback count for listenbrainz user '" << context.listenBrainzUserName << "' = " << *totalFeedbackCount;
+
+					bool needSync {totalFeedbackCount && (!context.feedbackCount || *context.feedbackCount != *totalFeedbackCount)};
+					context.feedbackCount = totalFeedbackCount;
+
+					if (needSync)
+						enqueGetFeedbacks(context);
+					else
+						onSyncEnded(context);
+				});
+			};
+		request.onFailureFunc = [this, &context]
+			{
+				onSyncEnded(context);
+			};
+
+		_client.sendGETRequest(std::move(request));
+	}
+
+	void
+	FeedbacksSynchronizer::enqueGetFeedbacks(UserContext& context)
+	{
+		assert(!context.listenBrainzUserName.empty());
+
+		Http::ClientGETRequestParameters request;
+		request.relativeUrl = "/1/feedback/user/" + context.listenBrainzUserName + "/get-feedback?offset=" + std::to_string(context.fetchedFeedbackCount);
+		request.priority = Http::ClientRequestParameters::Priority::Low;
+		request.onSuccessFunc = [this, &context] (std::string_view msgBody)
+			{
+				std::string msgBodyCopy {msgBody};
+				_strand.dispatch([this, msgBodyCopy, &context]
+				{
+					try
+					{
+						const std::size_t fetchedFeedbackCount {processGetFeedbacks(msgBodyCopy, context)};
+						if (fetchedFeedbackCount == 0 // no more thing available on server
+								|| context.fetchedFeedbackCount >= context.feedbackCount // we may miss something, but we will get it next time
+								|| context.fetchedFeedbackCount >= _maxSyncFeedbackCount)
+						{
+							onSyncEnded(context);
+						}
+						else
+						{
+							enqueGetFeedbacks(context);
+						}
+					}
+					catch (const Exception& e)
+					{
+						onSyncEnded(context);
+					}
+				});
+			};
+		request.onFailureFunc = [=, &context]
+			{
+				onSyncEnded(context);
+			};
+
+		_client.sendGETRequest(std::move(request));
+	}
+
+	std::size_t
+	FeedbacksSynchronizer::processGetFeedbacks(std::string_view msgBody, UserContext& context)
+	{
+		const GetFeedbacksResult parseResult {parseGetFeedbacks(msgBody)};
+
+		LOG(DEBUG) << "Parsed " << parseResult.totalFeedbackCount << " feedbacks, found " << parseResult.feedbacks.size() << " usable entries";
+		context.fetchedFeedbackCount += parseResult.totalFeedbackCount;
+
+		for (const Feedback& feedback : parseResult.feedbacks)
+		{
+			tryImportFeedback(feedback, context);
+		}
+
+		return parseResult.totalFeedbackCount;
+	}
+
+	void
+	FeedbacksSynchronizer::tryImportFeedback(const Feedback& feedback, UserContext& context)
+	{
+		Database::Session& session {_db.getTLSSession()};
+
+		bool needImport{};
+		TrackId trackId;
+
+		{
+			auto transaction {session.createSharedTransaction()};
+			const std::vector<Track::pointer> tracks {Track::findByRecordingMBID(session, feedback.recordingMBID)};
+			if (tracks.size() > 1)
+			{
+				LOG(DEBUG) << "Duplicate recording MBIDs found for '" << feedback.recordingMBID.getAsString() << "', using first entry found";
+			}
+			else if (tracks.empty())
+			{
+				LOG(DEBUG) << "No track found for recording MBID '" << feedback.recordingMBID.getAsString() << "'";
+				return;
+			}
+
+			trackId = tracks.front()->getId();
+
+			const StarredTrack::pointer starredTrack {StarredTrack::find(session, trackId, context.userId, Database::Scrobbler::ListenBrainz)};
+			needImport = !starredTrack;
+
+			// don't update starred date time
+			// no need to update state if it was found as not synchronized
+			// pending remove => will be removed later
+			// pending add => will be resent later
+		}
+
+		if (needImport)
+		{
+			auto transaction {session.createUniqueTransaction()};
+
+			const Track::pointer track {Track::find(session, trackId)};
+			if (!track)
+				return;
+
+			const User::pointer user {User::find(session, context.userId)};
+			if (!user)
+				return;
+
+			StarredTrack::pointer starredTrack {StarredTrack::create(session, track, user, Database::Scrobbler::ListenBrainz)};
+			starredTrack.modify()->setScrobblingState(ScrobblingState::Synchronized);
+
+			context.importedFeedbackCount++;
+		}
+		else
+		{
+			context.matchedFeedbackCount++;
+		}
+	}
+} // namespace Scrobbling::ListenBrainz

src/libs/services/scrobbling/impl/listenbrainz/FeedbacksSynchronizer.hpp

@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2021 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LMS is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <optional>
+#include <unordered_map>
+#include <boost/asio/io_context.hpp>
+#include <boost/asio/io_context_strand.hpp>
+#include <boost/asio/steady_timer.hpp>
+
+#include "services/database/Types.hpp"
+#include "services/database/UserId.hpp"
+
+#include "services/scrobbling/Listen.hpp"
+
+#include "FeedbackTypes.hpp"
+
+
+namespace Database
+{
+	class Db;
+}
+
+namespace Http
+{
+	class IClient;
+}
+
+namespace Scrobbling::ListenBrainz
+{
+	class FeedbacksSynchronizer
+	{
+		public:
+			FeedbacksSynchronizer(boost::asio::io_context& ioContext, Database::Db& db, Http::IClient& client);
+
+			void enqueFeedback(FeedbackType type, Database::StarredTrackId starredTrackId);
+
+		private:
+			void onFeedbackSent(FeedbackType type, Database::StarredTrackId starredTrackId);
+
+			void enquePendingFeedbacks();
+
+			struct UserContext
+			{
+				UserContext(Database::UserId id) : userId {id} {}
+
+				UserContext(const UserContext&) = delete;
+				UserContext(UserContext&&) = delete;
+				UserContext& operator=(const UserContext&) = delete;
+				UserContext& operator=(UserContext&&) = delete;
+
+				const Database::UserId		userId;
+				bool						syncing {};
+				std::optional<std::size_t>	feedbackCount {};
+
+				// resetted at each sync
+				std::string		listenBrainzUserName; // need to be resolved first
+
+				std::size_t		currentOffset{};
+				std::size_t		fetchedFeedbackCount{};
+				std::size_t		matchedFeedbackCount{};
+				std::size_t		importedFeedbackCount{};
+			};
+
+			UserContext& getUserContext(Database::UserId userId);
+			bool isSyncing() const;
+			void scheduleSync(std::chrono::seconds fromNow);
+			void startSync();
+			void startSync(UserContext& context);
+			void onSyncEnded(UserContext& context);
+			void enqueValidateToken(UserContext& context);
+			void enqueGetFeedbackCount(UserContext& context);
+			void enqueGetFeedbacks(UserContext& context);
+			std::size_t processGetFeedbacks(std::string_view body, UserContext& context);
+			void tryImportFeedback(const Feedback& feedback, UserContext& context);
+
+			boost::asio::io_context&		_ioContext;
+			boost::asio::io_context::strand	_strand {_ioContext};
+			Database::Db&					_db;
+			boost::asio::steady_timer		_syncTimer {_ioContext};
+			Http::IClient&					_client;
+
+			std::unordered_map<Database::UserId, UserContext> _userContexts;
+
+			const std::size_t			_maxSyncFeedbackCount;
+			const std::chrono::hours	_syncFeedbacksPeriod;
+	};
+} // Scrobbling::ListenBrainz
+

src/libs/services/scrobbling/impl/listenbrainz/ListenBrainzScrobbler.cpp

@@ -21,6 +21,8 @@
 
 #include "services/database/Db.hpp"
 #include "services/database/Session.hpp"
+#include "services/database/StarredArtist.hpp"
+#include "services/database/StarredRelease.hpp"
 #include "services/database/Track.hpp"
 #include "utils/IConfig.hpp"
 #include "utils/http/IClient.hpp"
@@ -28,16 +30,16 @@
 #include "utils/Service.hpp"
 #include "Utils.hpp"
 
-#define LOG(sev)	LMS_LOG(SCROBBLING, sev) << "[listenbrainz] - "
+using namespace Database;
 
 namespace
 {
 	bool
-	canBeScrobbled(Database::Session& session, Database::TrackId trackId, std::chrono::seconds duration)
+	canBeScrobbled(Session& session, TrackId trackId, std::chrono::seconds duration)
 	{
 		auto transaction {session.createSharedTransaction()};
 
-		const Database::Track::pointer track {Database::Track::find(session, trackId)};
+		const Track::pointer track {Track::find(session, trackId)};
 		if (!track)
 			return false;
 
@@ -47,18 +49,40 @@ namespace
 
 		return res;
 	}
+
+	template <typename StarredObjType>
+	void onStarred(Database::Session& session, typename StarredObjType::IdType id)
+	{
+		auto transaction {session.createUniqueTransaction()};
+
+		if (auto starredObj {StarredObjType::find(session, id)})
+		{
+			// maybe in the future this will be supported by ListenBrainz so set it to PendingAdd
+			starredObj.modify()->setScrobblingState(Database::ScrobblingState::PendingAdd);
+		}
+	}
+
+	template <typename StarredObjType>
+	void onUnstarred(Database::Session& session, typename StarredObjType::IdType id)
+	{
+		auto transaction {session.createUniqueTransaction()};
+
+		if (auto starredObj {StarredObjType::find(session, id)})
+			starredObj.remove();
+	}
 }
 
 namespace Scrobbling::ListenBrainz
 {
-	Scrobbler::Scrobbler(boost::asio::io_context& ioContext, Database::Db& db)
+	Scrobbler::Scrobbler(boost::asio::io_context& ioContext, Db& db)
 		: _ioContext {ioContext}
 		, _db {db}
 		, _baseAPIUrl {Service<IConfig>::get()->getString("listenbrainz-api-base-url", "https://api.listenbrainz.org")}
 		, _client {Http::createClient(_ioContext, _baseAPIUrl)}
 		, _listensSynchronizer {_ioContext, db, *_client}
+		, _feedbacksSynchronizer {_ioContext, db, *_client}
 	{
-		LOG(INFO) << "Starting ListenBrainz scrobbler... API endpoint = '" << _baseAPIUrl;
+		LOG(INFO) << "Starting ListenBrainz scrobbler... API endpoint = '" << _baseAPIUrl << "'";
 	}
 
 	Scrobbler::~Scrobbler()
@@ -87,5 +111,41 @@ namespace Scrobbling::ListenBrainz
 	{
 		_listensSynchronizer.enqueListen(timedListen);
 	}
+
+	void
+	Scrobbler::onStarred(StarredArtistId starredArtistId)
+	{
+		::onStarred<StarredArtist>(_db.getTLSSession(), starredArtistId);
+	}
+
+	void
+	Scrobbler::onUnstarred(StarredArtistId starredArtistId)
+	{
+		::onUnstarred<StarredArtist>(_db.getTLSSession(), starredArtistId);
+	}
+
+	void
+	Scrobbler::onStarred(StarredReleaseId starredReleaseId)
+	{
+		::onStarred<StarredRelease>(_db.getTLSSession(), starredReleaseId);
+	}
+
+	void
+	Scrobbler::onUnstarred(StarredReleaseId starredReleaseId)
+	{
+		::onUnstarred<StarredRelease>(_db.getTLSSession(), starredReleaseId);
+	}
+
+	void
+	Scrobbler::onStarred(StarredTrackId starredTrackId)
+	{
+		_feedbacksSynchronizer.enqueFeedback(FeedbackType::Love, starredTrackId);
+	}
+
+	void
+	Scrobbler::onUnstarred(StarredTrackId starredtrackId)
+	{
+		_feedbacksSynchronizer.enqueFeedback(FeedbackType::Erase, starredtrackId);
+	}
 } // namespace Scrobbling::ListenBrainz
 

src/libs/services/scrobbling/impl/listenbrainz/ListenBrainzScrobbler.hpp

@@ -19,17 +19,17 @@
 
 #pragma once
 
+#include <string>
 #include <optional>
 #include <boost/asio/io_context.hpp>
 
 #include "IScrobbler.hpp"
+#include "FeedbacksSynchronizer.hpp"
 #include "ListensSynchronizer.hpp"
 
 namespace Database
 {
 	class Db;
-	class Session;
-	class TrackList;
 }
 
 namespace Scrobbling::ListenBrainz
@@ -50,11 +50,23 @@ namespace Scrobbling::ListenBrainz
 			void listenFinished(const Listen& listen, std::optional<std::chrono::seconds> duration) override;
 			void addTimedListen(const TimedListen& listen) override;
 
+			// Submit listens
+			void enqueListen(const Listen& listen, const Wt::WDateTime& timePoint);
+
+			// Star
+			void onStarred(Database::StarredArtistId starredArtistId) override;
+			void onUnstarred(Database::StarredArtistId starredArtistId) override;
+			void onStarred(Database::StarredReleaseId starredReleaseId) override;
+			void onUnstarred(Database::StarredReleaseId starredReleaseId) override;
+			void onStarred(Database::StarredTrackId starredTrackId) override;
+			void onUnstarred(Database::StarredTrackId starredTrackId) override;
+
 			boost::asio::io_context&		_ioContext;
 			Database::Db&					_db;
 			std::string						_baseAPIUrl;
 			std::unique_ptr<Http::IClient>	_client;
 			ListensSynchronizer				_listensSynchronizer;
+			FeedbacksSynchronizer			_feedbacksSynchronizer;
 	};
 } // Scrobbling::ListenBrainz
 

src/libs/services/scrobbling/impl/listenbrainz/ListensSynchronizer.cpp

@@ -31,19 +31,14 @@
 #include "services/database/Release.hpp"
 #include "services/database/Session.hpp"
 #include "services/database/Track.hpp"
-#include "services/database/TrackList.hpp"
 #include "services/database/User.hpp"
 #include "services/scrobbling/Exception.hpp"
 #include "utils/IConfig.hpp"
 #include "utils/http/IClient.hpp"
-#include "utils/Logger.hpp"
 #include "utils/Service.hpp"
 
 #include "Utils.hpp"
 
-#define LOG(sev)	LMS_LOG(SCROBBLING, sev) << "[listenbrainz Synchronizer] - "
-#define LOG_EX(sev)	LMS_LOG_EX(Module::SCROBBLING, sev) << "[listenbrainz Synchronizer] - "
-
 namespace
 {
 	using namespace Scrobbling::ListenBrainz;
@@ -128,29 +123,6 @@ namespace
 		return res;
 	}
 
-	std::string
-	parseValidateToken(std::string_view msgBody)
-	{
-		std::string listenBrainzUserName;
-
-		Wt::Json::ParseError error;
-		Wt::Json::Object root;
-		if (!Wt::Json::parse(std::string {msgBody}, root, error))
-		{
-			LOG(ERROR) << "Cannot parse 'validate-token' result: " << error.what();
-			return listenBrainzUserName;
-		}
-
-		if (!root.get("valid").orIfNull(false))
-		{
-			LOG(INFO) << "Invalid listenbrainz user";
-			return listenBrainzUserName;
-		}
-
-		listenBrainzUserName = root.get("user_name").orIfNull("");
-		return listenBrainzUserName;
-	}
-
 	std::optional<std::size_t>
 	parseListenCount(std::string_view msgBody)
 	{
@@ -536,7 +508,7 @@ namespace Scrobbling::ListenBrainz
 	{
 		_strand.dispatch([this, &context]
 		{
-			LOG_EX(context.importedListenCount > 0 ? Severity::INFO : Severity::DEBUG) << "Sync done for user '" << context.listenBrainzUserName << "', fetched: " << context.fetchedListenCount << ", matched: " << context.matchedListenCount << ", imported: " << context.importedListenCount;
+			LOG(INFO) << "Sync done for user '" << context.listenBrainzUserName << "', fetched: " << context.fetchedListenCount << ", matched: " << context.matchedListenCount << ", imported: " << context.importedListenCount;
 			context.syncing = false;
 
 			if (!isSyncing())
@@ -562,7 +534,7 @@ namespace Scrobbling::ListenBrainz
 		request.headers = { {"Authorization",  "Token " + std::string {listenBrainzToken->getAsString()}} };
 		request.onSuccessFunc = [this, &context] (std::string_view msgBody)
 			{
-				context.listenBrainzUserName = parseValidateToken(msgBody);
+				context.listenBrainzUserName = Utils::parseValidateToken(msgBody);
 				if (context.listenBrainzUserName.empty())
 				{
 					onSyncEnded(context);
@@ -587,6 +559,8 @@ namespace Scrobbling::ListenBrainz
 		request.relativeUrl = "/1/user/" + std::string {context.listenBrainzUserName} + "/listen-count";
 		request.priority = Http::ClientRequestParameters::Priority::Low;
 		request.onSuccessFunc = [=, &context] (std::string_view msgBody)
+			{
+				_strand.dispatch([=, &context]
 				{
 					const auto listenCount = parseListenCount(msgBody);
 					if (listenCount)
@@ -603,6 +577,7 @@ namespace Scrobbling::ListenBrainz
 
 					context.maxDateTime = Wt::WDateTime::currentDateTime();
 					enqueGetListens(context);
+				});
 			};
 		request.onFailureFunc = [this, &context]
 			{

src/libs/services/scrobbling/impl/listenbrainz/ListensSynchronizer.hpp

@@ -26,16 +26,13 @@
 #include <boost/asio/steady_timer.hpp>
 
 #include "services/database/Types.hpp"
-#include "services/database/ListenId.hpp"
 #include "services/database/UserId.hpp"
+
 #include "services/scrobbling/Listen.hpp"
 
 namespace Database
 {
 	class Db;
-	class Session;
-	class TrackList;
-	class User;
 }
 
 namespace Http

src/libs/services/scrobbling/impl/listenbrainz/Utils.cpp

@@ -19,6 +19,9 @@
 
 #include "Utils.hpp"
 
+#include <Wt/Json/Object.h>
+#include <Wt/Json/Parser.h>
+
 #include "services/database/Session.hpp"
 #include "services/database/User.hpp"
 
@@ -35,4 +38,27 @@ namespace Scrobbling::ListenBrainz::Utils
 
 		return user->getListenBrainzToken();
 	}
+
+	std::string
+	parseValidateToken(std::string_view msgBody)
+	{
+		std::string listenBrainzUserName;
+
+		Wt::Json::ParseError error;
+		Wt::Json::Object root;
+		if (!Wt::Json::parse(std::string {msgBody}, root, error))
+		{
+			LOG(ERROR) << "Cannot parse 'validate-token' result: " << error.what();
+			return listenBrainzUserName;
+		}
+
+		if (!root.get("valid").orIfNull(false))
+		{
+			LOG(INFO) << "Invalid listenbrainz user";
+			return listenBrainzUserName;
+		}
+
+		listenBrainzUserName = root.get("user_name").orIfNull("");
+		return listenBrainzUserName;
+	}
 }

src/libs/services/scrobbling/impl/listenbrainz/Utils.hpp

@@ -21,16 +21,19 @@
 
 #include "utils/UUID.hpp"
 
-#include "services/database/Types.hpp"
 #include "services/database/UserId.hpp"
+#include "utils/Logger.hpp"
+
+#define LOG(sev)	LMS_LOG(SCROBBLING, sev) << "[listenbrainz] - "
 
 namespace Database
 {
 	class Session;
-	class User;
 }
 
 namespace Scrobbling::ListenBrainz::Utils
 {
 	std::optional<UUID>	getListenBrainzToken(Database::Session& session, Database::UserId userId);
+
+	std::string parseValidateToken(std::string_view msgBody);
 }

src/libs/services/scrobbling/include/services/scrobbling/Exception.hpp

@@ -23,7 +23,6 @@
 
 namespace Scrobbling
 {
-
 	class Exception : public LmsException
 	{
 		public: