Implement Scrobble buffering/retrying

core/scrobbler/interfaces.go

@@ -2,6 +2,7 @@ package scrobbler
 
 import (
 	"context"
+	"errors"
 	"time"
 
 	"github.com/navidrome/navidrome/model"
@@ -12,10 +13,16 @@ type Scrobble struct {
 	TimeStamp time.Time
 }
 
+var (
+	ErrNotAuthorized = errors.New("not authorized")
+	ErrRetryLater    = errors.New("retry later")
+	ErrUnrecoverable = errors.New("unrecoverable")
+)
+
 type Scrobbler interface {
 	IsAuthorized(ctx context.Context, userId string) bool
 	NowPlaying(ctx context.Context, userId string, track *model.MediaFile) error
-	Scrobble(ctx context.Context, userId string, scrobbles []Scrobble) error
+	Scrobble(ctx context.Context, userId string, s Scrobble) error
 }
 
 type Constructor func(ds model.DataStore) Scrobbler