feat(subsonic): add stub lyrics.view

fixes #274

server/ctrlsubsonic/handlers_common.go

@@ -407,3 +407,9 @@ func (c *Controller) ServeJukebox(r *http.Request) *spec.Response { // nolint:go
 	sub.JukeboxStatus = status
 	return sub
 }
+
+func (c *Controller) ServeGetLyrics(r *http.Request) *spec.Response {
+	sub := spec.NewResponse()
+	sub.Lyrics = &spec.Lyrics{}
+	return sub
+}

server/ctrlsubsonic/spec/spec.go

@@ -58,6 +58,7 @@ type Response struct {
 	SimilarSongs          *SimilarSongs          `xml:"similarSongs"          json:"similarSongs,omitempty"`
 	SimilarSongsTwo       *SimilarSongsTwo       `xml:"similarSongs2"         json:"similarSongs2,omitempty"`
 	InternetRadioStations *InternetRadioStations `xml:"internetRadioStations" json:"internetRadioStations,omitempty"`
+	Lyrics                *Lyrics                `xml:"lyrics"                json:"lyrics,omitempty"`
 }
 
 func NewResponse() *Response {
@@ -409,6 +410,12 @@ type InternetRadioStation struct {
 	HomepageURL string     `xml:"homepageUrl,attr" json:"homepageUrl"`
 }
 
+type Lyrics struct {
+	Value  string `xml:",chardata"             json:"value,omitempty"`
+	Artist string `xml:"artist,attr,omitempty" json:"artist,omitempty"`
+	Title  string `xml:"title,attr,omitempty"  json:"title,omitempty"`
+}
+
 func formatRating(rating float64) string {
 	if rating == 0 {
 		return ""

server/server.go

@@ -236,6 +236,7 @@ func setupSubsonic(r *mux.Router, ctrl *ctrlsubsonic.Controller) {
 	r.Handle("/getTopSongs{_:(?:\\.view)?}", ctrl.H(ctrl.ServeGetTopSongs))
 	r.Handle("/getSimilarSongs{_:(?:\\.view)?}", ctrl.H(ctrl.ServeGetSimilarSongs))
 	r.Handle("/getSimilarSongs2{_:(?:\\.view)?}", ctrl.H(ctrl.ServeGetSimilarSongsTwo))
+	r.Handle("/getLyrics{_:(?:\\.view)?}", ctrl.H(ctrl.ServeGetLyrics))
 
 	// raw
 	r.Handle("/getCoverArt{_:(?:\\.view)?}", ctrl.HR(ctrl.ServeGetCoverArt))