add support for OpenSubsonic playbackReport extension (#910)

* add support for OpenSubsonic playbackReport extension

* better style

backend/mediaprovider/mediaprovider.go

@@ -302,6 +302,10 @@ type CanSavePlayQueue interface {
 	GetPlayQueue() (*SavedPlayQueue, error)
 }
 
+type CanReportPlayback interface {
+	ReportPlayback(trackID string, positionMs int64, state string) error
+}
+
 type LyricsProvider interface {
 	GetLyrics(track *Track) (*Lyrics, error)
 }

backend/mediaprovider/subsonic/subsonicmediaprovider.go

@@ -37,6 +37,9 @@ type subsonicMediaProvider struct {
 
 	radiosCached   []*mediaprovider.RadioStation
 	radiosCachedAt int64 // unix
+
+	playbackReportOnce      sync.Once
+	playbackReportSupported bool
 }
 
 func SubsonicMediaProvider(subsonicClient *subsonic.Client) mediaprovider.MediaProvider {
@@ -459,6 +462,30 @@ func (s *subsonicMediaProvider) GetLyrics(track *mediaprovider.Track) (*mediapro
 // CanSavePlayQueue interface
 var _ mediaprovider.CanSavePlayQueue = (*subsonicMediaProvider)(nil)
 
+// CanReportPlayback interface
+var _ mediaprovider.CanReportPlayback = (*subsonicMediaProvider)(nil)
+
+func (s *subsonicMediaProvider) ReportPlayback(trackID string, positionMs int64, state string) error {
+	s.playbackReportOnce.Do(func() {
+		ext, err := s.client.GetOpenSubsonicExtensions()
+		s.playbackReportSupported = err == nil && slices.ContainsFunc(ext,
+			func(e *subsonic.OpenSubsonicExtension) bool {
+				return e.Name == subsonic.PlaybackReport
+			})
+	})
+	if !s.playbackReportSupported {
+		return nil
+	}
+	ignoreScrobble := true
+	return s.client.ReportPlayback(subsonic.ReportPlaybackParameters{
+		MediaID:        trackID,
+		MediaType:      subsonic.PlaybackMediaTypeSong,
+		PositionMs:     positionMs,
+		State:          subsonic.PlaybackState(state),
+		IgnoreScrobble: &ignoreScrobble,
+	})
+}
+
 func (s *subsonicMediaProvider) SavePlayQueue(trackIDs []string, currentTrackIdx int, timeSeconds int) error {
 	if len(trackIDs) == 0 {
 		return nil // don't save an empty queue

backend/playbackengine.go

@@ -170,17 +170,24 @@ func (p *playbackEngine) registerPlayerCallbacks(pl player.BasePlayer) {
 	pl.OnSeek(func() {
 		p.handleTimePosUpdate(true)
 		p.invokeNoArgCallbacks(p.onSeek)
+		seekState := "playing"
+		if p.PlaybackStatus().State == player.Paused {
+			seekState = "paused"
+		}
+		p.reportPlayback(seekState)
 	})
 	pl.OnStopped(p.handleOnStopped)
 	pl.OnPaused(func() {
 		p.playTimeStopwatch.Stop()
 		p.stopPollTimePos()
 		p.invokeNoArgCallbacks(p.onPaused)
+		p.reportPlayback("paused")
 	})
 	pl.OnPlaying(func() {
 		p.playTimeStopwatch.Start()
 		p.startPollTimePos()
 		p.invokeNoArgCallbacks(p.onPlaying)
+		p.reportPlayback("playing")
 	})
 }
 
@@ -926,6 +933,7 @@ func (p *playbackEngine) handleOnStopped() {
 	p.handleTimePosUpdate(false)
 	p.invokeOnSongChangeCallbacks()
 	p.invokeNoArgCallbacks(p.onStopped)
+	p.reportPlayback("stopped")
 	p.alreadyScrobbled = false
 	p.wasStopped = true
 	p.nowPlayingIdx = -1
@@ -1091,6 +1099,7 @@ func (p *playbackEngine) sendNowPlayingScrobble() {
 		track.PlayCount += 1
 	}
 	go p.sm.Server.TrackBeganPlayback(track.ID)
+	p.reportPlayback("starting")
 }
 
 // creates a deep copy of the track info so that we can maintain our own state
@@ -1113,6 +1122,22 @@ func (p *playbackEngine) invokeOnSongChangeCallbacks() {
 	p.lastScrobbled = nil
 }
 
+func (p *playbackEngine) reportPlayback(state string) {
+	reporter, ok := p.sm.Server.(mediaprovider.CanReportPlayback)
+	if !ok {
+		return
+	}
+	if p.getPlayQueueLength() == 0 || p.nowPlayingIdx < 0 {
+		return
+	}
+	np := p.NowPlaying()
+	if np == nil || np.Metadata().Type != mediaprovider.MediaItemTypeTrack {
+		return
+	}
+	posMs := int64(p.latestTrackPosition * 1000)
+	go reporter.ReportPlayback(np.Metadata().ID, posMs, state)
+}
+
 func (pm *playbackEngine) invokeNoArgCallbacks(cbs []func()) {
 	if pm.callbacksDisabled {
 		return

go.mod

@@ -22,7 +22,7 @@ require (
 	github.com/quarckster/go-mpris-server v1.0.3
 	github.com/supersonic-app/fyne-lyrics v0.0.0-20250614151306-b1880a70a410
 	github.com/supersonic-app/go-mpv v0.1.1-0.20250822102843-7a8cde5f5449
-	github.com/supersonic-app/go-subsonic v0.0.0-20260409151555-0d5fb7d4801a
+	github.com/supersonic-app/go-subsonic v0.0.0-20260416152144-7a5f505a273c
 	github.com/supersonic-app/go-upnpcast v0.1.0
 	github.com/zalando/go-keyring v0.2.8
 	golang.org/x/net v0.50.0

go.sum

@@ -125,6 +125,8 @@ github.com/supersonic-app/go-mpv v0.1.1-0.20250822102843-7a8cde5f5449 h1:UHIPI43
 github.com/supersonic-app/go-mpv v0.1.1-0.20250822102843-7a8cde5f5449/go.mod h1:1bQz6kBQumJopXEbkiqoLxIXLy7F7yWFBvknvpAtIC0=
 github.com/supersonic-app/go-subsonic v0.0.0-20260409151555-0d5fb7d4801a h1:zK5ZbE7H337udw2tOZQlnhGv7URSxfV1AIvRpKdHG2E=
 github.com/supersonic-app/go-subsonic v0.0.0-20260409151555-0d5fb7d4801a/go.mod h1:ClhAgC2qobwH19D6kdwULLYSHlOmldDGkdu2G2Z0Ijo=
+github.com/supersonic-app/go-subsonic v0.0.0-20260416152144-7a5f505a273c h1:wms3FvahSfcnacW2rs9L+vzJR8FmTE5xTrRgf3+k3eQ=
+github.com/supersonic-app/go-subsonic v0.0.0-20260416152144-7a5f505a273c/go.mod h1:ClhAgC2qobwH19D6kdwULLYSHlOmldDGkdu2G2Z0Ijo=
 github.com/supersonic-app/go-upnpcast v0.1.0 h1:SL0WVgnqvAVaLT9MSRhSeVwF9pcUw1cgBITKVoWXN3g=
 github.com/supersonic-app/go-upnpcast v0.1.0/go.mod h1:o/QGDTK3qdaS3h9Bt8aH5ywgbWbrPVzPCHlZYFs0IHY=
 github.com/yuin/goldmark v1.7.16 h1:n+CJdUxaFMiDUNnWC3dMWCIQJSkxH4uz3ZwQBkAlVNE=