move the id type into spec

server/db/model.go

@@ -11,6 +11,9 @@ import (
 	"strings"
 	"time"
 
+	// TODO: remove this dep
+
+	"go.senan.xyz/gonic/server/ctrlsubsonic/specid"
 	"go.senan.xyz/gonic/server/mime"
 )
 
@@ -46,6 +49,10 @@ type Artist struct {
 	AlbumCount int      `sql:"-"`
 }
 
+func (a *Artist) SID() specid.ID {
+	return specid.ID{Type: specid.Artist, Value: a.ID}
+}
+
 func (a *Artist) IndexName() string {
 	if len(a.NameUDec) > 0 {
 		return a.NameUDec
@@ -85,6 +92,18 @@ type Track struct {
 	TagBrainzID    string `sql:"default: null"`
 }
 
+func (t *Track) SID() specid.ID {
+	return specid.ID{Type: specid.Track, Value: t.ID}
+}
+
+func (t *Track) AlbumSID() specid.ID {
+	return specid.ID{Type: specid.Album, Value: t.AlbumID}
+}
+
+func (t *Track) ArtistSID() specid.ID {
+	return specid.ID{Type: specid.Artist, Value: t.ArtistID}
+}
+
 func (t *Track) Ext() string {
 	longExt := path.Ext(t.Filename)
 	if len(longExt) < 1 {
@@ -157,6 +176,14 @@ type Album struct {
 	ReceivedTags  bool `gorm:"-"`
 }
 
+func (a *Album) SID() specid.ID {
+	return specid.ID{Type: specid.Album, Value: a.ID}
+}
+
+func (a *Album) ParentSID() specid.ID {
+	return specid.ID{Type: specid.Album, Value: a.ParentID}
+}
+
 func (a *Album) IndexRightPath() string {
 	if len(a.RightPathUDec) > 0 {
 		return a.RightPathUDec