Fix reading the "quality" parameter in the icecast JSON status

It's a float encoded as a string.

node/icecast/status.go

@@ -9,6 +9,7 @@ import (
 	"log"
 	"net/http"
 	"net/url"
+	"strconv"
 	"time"
 
 	"git.autistici.org/ale/autoradio"
@@ -22,20 +23,20 @@ var (
 
 // TODO: deserialize properly the time format used by Icecast.
 type icecastMountStatus struct {
-	Artist      string  `json:"artist"`
-	BitRate     int32   `json:"audio_bitrate"`
-	Channels    int32   `json:"audio_channels"`
-	AudioInfo   string  `json:"audio_info"`
-	SampleRate  int32   `json:"audio_samplerate"`
-	Genre       string  `json:"genre"`
-	Listeners   int32   `json:"listeners"`
-	ListenURL   string  `json:"listenurl"`
-	Quality     float32 `json:"quality"`
-	Description string  `json:"server_description"`
-	Name        string  `json:"server_name"`
-	Type        string  `json:"server_type"`
-	Subtype     string  `json:"subtype"`
-	Title       string  `json:"title"`
+	Artist      string `json:"artist"`
+	BitRate     int32  `json:"audio_bitrate"`
+	Channels    int32  `json:"audio_channels"`
+	AudioInfo   string `json:"audio_info"`
+	SampleRate  int32  `json:"audio_samplerate"`
+	Genre       string `json:"genre"`
+	Listeners   int32  `json:"listeners"`
+	ListenURL   string `json:"listenurl"`
+	Quality     string `json:"quality"`
+	Description string `json:"server_description"`
+	Name        string `json:"server_name"`
+	Type        string `json:"server_type"`
+	Subtype     string `json:"subtype"`
+	Title       string `json:"title"`
 	//StreamStart time.Time `json:"stream_start_iso8601"`
 }
 
@@ -99,13 +100,16 @@ func convertIcecastStatus(status []icecastMountStatus) []*pb.IcecastMount {
 			Listeners:   m.Listeners,
 			BitRate:     m.BitRate,
 			SampleRate:  m.SampleRate,
-			Quality:     m.Quality,
 			Channels:    m.Channels,
 			Name:        m.Name,
 			Description: m.Description,
 			Title:       m.Title,
 			Artist:      m.Artist,
 		}
+		// For whatever reason, quality is a string in Icecast's JSON.
+		if q, err := strconv.ParseFloat(m.Quality, 32); err == nil {
+			outm.Quality = float32(q)
+		}
 		out = append(out, &outm)
 	}
 	return out