From 98a140791b71e66d9d6fc2dd693d7d9a6fd7d738 Mon Sep 17 00:00:00 2001
From: Drew Weymouth <dweymouth@gmail.com>
Date: Sat, 13 Apr 2024 08:34:14 -0700
Subject: [PATCH] beginning of work to save queue to server

---
 backend/app.go                                |  2 +-
 backend/mediaprovider/mediaprovider.go        |  5 +++++
 backend/mediaprovider/model.go                |  6 ++++++
 .../subsonic/subsonicmediaprovider.go         | 21 +++++++++++++++++++
 backend/savedplayqueue.go                     | 12 +++++------
 5 files changed, 39 insertions(+), 7 deletions(-)

diff --git a/backend/app.go b/backend/app.go
index 1ea8d41..1f211c5 100644
--- a/backend/app.go
+++ b/backend/app.go
@@ -305,7 +305,7 @@ func (a *App) Shutdown() {
 	a.MPRISHandler.Shutdown()
 	a.PlaybackManager.DisableCallbacks()
 	if a.Config.Application.SavePlayQueue {
-		SavePlayQueue(a.ServerManager.ServerID.String(), a.PlaybackManager, configdir.LocalConfig(a.appName, savedQueueFile))
+		SavePlayQueue(a.ServerManager.ServerID.String(), a.PlaybackManager, configdir.LocalConfig(a.appName, savedQueueFile), false)
 	}
 	a.PlaybackManager.Stop() // will trigger scrobble check
 	a.Config.LocalPlayback.Volume = a.LocalPlayer.GetVolume()
diff --git a/backend/mediaprovider/mediaprovider.go b/backend/mediaprovider/mediaprovider.go
index cc04d2c..648a363 100644
--- a/backend/mediaprovider/mediaprovider.go
+++ b/backend/mediaprovider/mediaprovider.go
@@ -258,6 +258,11 @@ type SupportsSharing interface {
 	CanShareArtists() bool
 }
 
+type CanSavePlayQueue interface {
+	SavePlayQueue(trackIDs []string, currentTrackPos int, timeSeconds int) error
+	GetPlayQueue() (*SavedPlayQueue, error)
+}
+
 type LyricsProvider interface {
 	GetLyrics(track *Track) (*Lyrics, error)
 }
diff --git a/backend/mediaprovider/model.go b/backend/mediaprovider/model.go
index 33a9d70..c865bce 100644
--- a/backend/mediaprovider/model.go
+++ b/backend/mediaprovider/model.go
@@ -133,6 +133,12 @@ type LyricLine struct {
 	Start float64 // seconds
 }
 
+type SavedPlayQueue struct {
+	Tracks   []*Track
+	TrackPos int
+	TimePos  int // seconds
+}
+
 type ContentType int
 
 const (
diff --git a/backend/mediaprovider/subsonic/subsonicmediaprovider.go b/backend/mediaprovider/subsonic/subsonicmediaprovider.go
index a8316bb..ea7001d 100644
--- a/backend/mediaprovider/subsonic/subsonicmediaprovider.go
+++ b/backend/mediaprovider/subsonic/subsonicmediaprovider.go
@@ -379,6 +379,27 @@ func (s *subsonicMediaProvider) GetLyrics(track *mediaprovider.Track) (*mediapro
 	return mpLyrics, nil
 }
 
+// CanSavePlayQueue interface
+
+func (s *subsonicMediaProvider) SavePlayQueue(trackIDs []string, currentTrackPos int, timeSeconds int) error {
+	return s.client.SavePlayQueue(trackIDs, map[string]string{
+		"current":  trackIDs[currentTrackPos],
+		"position": strconv.Itoa(timeSeconds * 1000),
+	})
+}
+
+func (s *subsonicMediaProvider) GetPlayQueue() (*mediaprovider.SavedPlayQueue, error) {
+	pq, err := s.client.GetPlayQueue()
+	if err != nil {
+		return nil, err
+	}
+	savedQueue := &mediaprovider.SavedPlayQueue{}
+	savedQueue.Tracks = sharedutil.MapSlice(pq.Entries, toTrack)
+	savedQueue.TrackPos = pq.Current
+	savedQueue.TimePos = int(pq.Position)
+	return savedQueue, nil
+}
+
 func toTrack(ch *subsonic.Child) *mediaprovider.Track {
 	if ch == nil {
 		return nil
diff --git a/backend/savedplayqueue.go b/backend/savedplayqueue.go
index 1fe8e85..53cdca6 100644
--- a/backend/savedplayqueue.go
+++ b/backend/savedplayqueue.go
@@ -22,7 +22,7 @@ type serializedSavedPlayQueue struct {
 }
 
 // SavePlayQueue saves the current play queue and playback position to a JSON file.
-func SavePlayQueue(serverID string, pm *PlaybackManager, filepath string) error {
+func SavePlayQueue(serverID string, pm *PlaybackManager, filepath string, saveToServer bool) error {
 	queue := pm.GetPlayQueue()
 	stats := pm.PlayerStatus()
 	trackIdx := pm.NowPlayingIndex()
@@ -38,12 +38,12 @@ func SavePlayQueue(serverID string, pm *PlaybackManager, filepath string) error
 		TrackIndex: trackIdx,
 		TimePos:    stats.TimePos,
 	}
-	b, err := json.Marshal(saved)
-	if err != nil {
-		return err
-	}
+	b, _ := json.Marshal(saved)
+	err := os.WriteFile(filepath, b, 0644)
 
-	return os.WriteFile(filepath, b, 0644)
+	if saveToServer {
+	}
+	return err
 }
 
 // Loads the saved play queue from the given filepath using the current server.