removed function fetch list

internal/data/song.go

@@ -11,6 +11,7 @@ type MusicObject interface {
 	Compile() MusicObject
 	GetIndices() []string
 	Merge(other MusicObject) MusicObject
+	Related() []MusicObject
 }
 
 func dedupeMusicObjects[T MusicObject](inputMusicObjects []T) []T {
@@ -71,6 +72,20 @@ type Song struct {
 	Sources []Source
 }
 
+func (m Song) Related() []MusicObject {
+	res := []MusicObject{}
+
+	for _, a := range m.Artists {
+		res = append(res, a)
+	}
+	if m.Album.Name != "" {
+		res = append(res, m.Album)
+	}
+
+	res = append(res, m)
+	return res
+}
+
 func (m Song) GetSources() []Source {
 	return m.Sources
 }
@@ -127,6 +142,20 @@ type Album struct {
 	Sources []Source
 }
 
+func (m Album) Related() []MusicObject {
+	res := []MusicObject{}
+
+	for _, a := range m.Artists {
+		res = append(res, a)
+	}
+	res = append(res, m)
+	for _, a := range m.Songs {
+		res = append(res, a)
+	}
+
+	return res
+}
+
 func (m Album) GetSources() []Source {
 	return m.Sources
 }
@@ -183,6 +212,16 @@ type Artist struct {
 	Sources []Source
 }
 
+func (m Artist) Related() []MusicObject {
+	res := []MusicObject{m}
+
+	for _, a := range m.Albums {
+		res = append(res, a)
+	}
+
+	return res
+}
+
 func (m Artist) GetSources() []Source {
 	return m.Sources
 }