add 'New Playlist' button to Playlists page

backend/mediaprovider/jellyfin/jellyfinmediaprovider.go

@@ -1,6 +1,7 @@
 package jellyfin
 
 import (
+	"errors"
 	"image"
 	"io"
 	"math"
@@ -77,7 +78,7 @@ func (j *jellyfinMediaProvider) SetLibrary(id string) error {
 	return nil
 }
 
-func (j *jellyfinMediaProvider) CreatePlaylist(name string, trackIDs []string) error {
+func (j *jellyfinMediaProvider) CreatePlaylistWithTracks(name string, trackIDs []string) error {
 	return j.client.CreatePlaylist(name, trackIDs)
 }
 
@@ -93,6 +94,10 @@ func (j *jellyfinMediaProvider) EditPlaylist(id, name, description string, publi
 	return j.client.UpdatePlaylistMetadata(id, name, description)
 }
 
+func (j *jellyfinMediaProvider) CreatePlaylist(name, description string, public bool) error {
+	return errors.New("unimplemented")
+}
+
 func (j *jellyfinMediaProvider) AddPlaylistTracks(id string, trackIDsToAdd []string) error {
 	return j.client.AddSongsToPlaylist(id, trackIDsToAdd)
 }

backend/mediaprovider/mediaprovider.go

@@ -256,10 +256,12 @@ type MediaProvider interface {
 
 	GetPlaylists() ([]*Playlist, error)
 
-	CreatePlaylist(name string, trackIDs []string) error
+	CreatePlaylistWithTracks(name string, trackIDs []string) error
 
 	CanMakePublicPlaylist() bool
 
+	CreatePlaylist(name, description string, public bool) error
+
 	EditPlaylist(id, name, description string, public bool) error
 
 	AddPlaylistTracks(id string, trackIDsToAdd []string) error

backend/mediaprovider/subsonic/subsonicmediaprovider.go

@@ -62,11 +62,32 @@ func (s *subsonicMediaProvider) SetLibrary(id string) error {
 	return nil
 }
 
-func (s *subsonicMediaProvider) CreatePlaylist(name string, trackIDs []string) error {
+func (s *subsonicMediaProvider) CreatePlaylistWithTracks(name string, trackIDs []string) error {
 	s.playlistsCached = nil
 	return s.client.CreatePlaylistWithTracks(trackIDs, map[string]string{"name": name})
 }
 
+func (s *subsonicMediaProvider) CreatePlaylist(name, description string, public bool) error {
+	pl, err := s.client.CreatePlaylist(map[string]string{"name": name})
+	if err != nil {
+		return err
+	}
+	if pl == nil || (description == "" && !public) {
+		// Subsonic <= 1.14.0 doesn't return a playlist
+		// Not having the ID, we can't set the description or public property
+		return nil
+	}
+
+	params := make(map[string]string)
+	if description != "" {
+		params["description"] = description
+	}
+	if public {
+		params["public"] = "true"
+	}
+	return s.client.UpdatePlaylist(pl.ID, params)
+}
+
 func (s *subsonicMediaProvider) DeletePlaylist(id string) error {
 	s.playlistsCached = nil
 	return s.client.DeletePlaylist(id)