Introduced NowPlayingRepository. Don't do anything for now

persistence/nowplaying_repository.go

@@ -0,0 +1,28 @@
+package persistence
+
+import (
+	"errors"
+	"time"
+
+	"github.com/deluan/gosonic/engine"
+)
+
+type nowPlayingRepository struct {
+	ledisRepository
+}
+
+func NewNowPlayingRepository() engine.NowPlayingRepository {
+	r := &nowPlayingRepository{}
+	r.init("nnowplaying", &engine.NowPlayingInfo{})
+	return r
+}
+
+func (r *nowPlayingRepository) Add(id string) error {
+	if id == "" {
+		return errors.New("Id is required")
+	}
+	m := &engine.NowPlayingInfo{TrackId: id, Start: time.Now()}
+	return r.saveOrUpdate(m.TrackId, m)
+}
+
+var _ engine.NowPlayingRepository = (*nowPlayingRepository)(nil)