Allow numeric title/album/artist on queue entries

queue.go

@@ -33,10 +33,10 @@ type QueueTrackEntry struct {
 	QueueIdentifier queue.QueueIdentifier
 	Path            string
 	Metadata        struct {
-		Title      string `json:"title"`
+		Title      interface{} `json:"title"`
-		Album      string `json:"album"`
+		Album      interface{} `json:"album"`
-		Artist     string `json:"artist"`
+		Artist     interface{} `json:"artist"`
-		Art        string `json:"art"`
+		Art        string      `json:"art"`
 		ReplayGain struct {
 			TrackPeak float64 `json:"track_peak"`
 			TrackGain float64 `json:"track_gain"`
@@ -50,6 +50,36 @@ type QueueTrackEntry struct {
 	original map[string]interface{}
 }
 
+func (e *QueueTrackEntry) Title() string {
+	if strVal, ok := e.Metadata.Title.(string); ok {
+		return strVal
+	} else if intVal, ok := e.Metadata.Title.(int); ok {
+		return strconv.Itoa(intVal)
+	}
+
+	return ""
+}
+
+func (e *QueueTrackEntry) Album() string {
+	if strVal, ok := e.Metadata.Album.(string); ok {
+		return strVal
+	} else if intVal, ok := e.Metadata.Album.(int); ok {
+		return strconv.Itoa(intVal)
+	}
+
+	return ""
+}
+
+func (e *QueueTrackEntry) Artist() string {
+	if strVal, ok := e.Metadata.Artist.(string); ok {
+		return strVal
+	} else if intVal, ok := e.Metadata.Artist.(int); ok {
+		return strconv.Itoa(intVal)
+	}
+
+	return ""
+}
+
 func (e *QueueTrackEntry) Load() error {
 	if e.source != nil {
 		return nil
@@ -105,16 +135,16 @@ func (e *QueueTrackEntry) Load() error {
 
 	//apply tags found on file
 	if meta != nil {
-		if e.Metadata.Title == "" {
+		if e.Title() == "" {
 			e.Metadata.Title = meta.Title()
 		}
-		if e.Metadata.Album == "" {
+		if e.Album() == "" {
 			e.Metadata.Album = meta.Album()
 		}
-		if e.Metadata.Artist == "" {
+		if e.Artist() == "" {
 			e.Metadata.Artist = meta.Artist()
 		}
-		if e.Metadata.Artist == "" {
+		if e.Artist() == "" {
 			e.Metadata.Artist = meta.AlbumArtist()
 		}
 
@@ -752,10 +782,10 @@ func (q *Queue) HandleRadioRequest(writer http.ResponseWriter, request *http.Req
 						return requestDone.Error
 					}
 					if metadataPacket, ok := packet.(*QueueMetadataPacket); ok {
-						if len(metadataPacket.TrackEntry.Metadata.Artist) > 0 {
+						if len(metadataPacket.TrackEntry.Artist()) > 0 {
-							metadataToSend["StreamTitle"] = fmt.Sprintf("%s - %s", metadataPacket.TrackEntry.Metadata.Artist, metadataPacket.TrackEntry.Metadata.Title)
+							metadataToSend["StreamTitle"] = fmt.Sprintf("%s - %s", metadataPacket.TrackEntry.Artist(), metadataPacket.TrackEntry.Title())
 						} else {
-							metadataToSend["StreamTitle"] = metadataPacket.TrackEntry.Metadata.Title
+							metadataToSend["StreamTitle"] = metadataPacket.TrackEntry.Title()
 						}
 						if len(metadataPacket.TrackEntry.Metadata.Art) > 0 {
 							metadataToSend["StreamURL"] = metadataPacket.TrackEntry.Metadata.Art