Implement Scrobble buffering/retrying

model/datastore.go

@@ -33,6 +33,7 @@ type DataStore interface {
 	Property(ctx context.Context) PropertyRepository
 	User(ctx context.Context) UserRepository
 	UserProps(ctx context.Context) UserPropsRepository
+	ScrobbleBuffer(ctx context.Context) ScrobbleBufferRepository
 
 	Resource(ctx context.Context, model interface{}) ResourceRepository
 

model/scrobble_buffer.go

@@ -0,0 +1,21 @@
+package model
+
+import "time"
+
+type ScrobbleEntry struct {
+	MediaFile
+	Service     string
+	UserID      string `json:"user_id" orm:"column(user_id)"`
+	PlayTime    time.Time
+	EnqueueTime time.Time
+}
+
+type ScrobbleEntries []ScrobbleEntry
+
+type ScrobbleBufferRepository interface {
+	UserIDs(service string) ([]string, error)
+	Enqueue(service, userId, mediaFileId string, playTime time.Time) error
+	Next(service string, userId string) (*ScrobbleEntry, error)
+	Dequeue(entry *ScrobbleEntry) error
+	Length() (int64, error)
+}