construct subsonic models elsewhere

server/lastfm/lastfm.go

@@ -48,10 +48,10 @@ func Scrobble(apiKey, secret, session string, track *model.Track,
 	}
 	params.Add("api_key", apiKey)
 	params.Add("sk", session)
-	params.Add("artist", track.Artist)
+	params.Add("artist", track.TrackArtist)
 	params.Add("track", track.Title)
 	params.Add("album", track.Album.Title)
-	params.Add("albumArtist", track.AlbumArtist.Name)
+	params.Add("albumArtist", track.Artist.Name)
 	params.Add("trackNumber", strconv.Itoa(track.TrackNumber))
 	params.Add("api_sig", getParamSignature(params, secret))
 	_, err := makeRequest("POST", params)

server/lastfm/lastfm_test.go

@@ -0,0 +1,23 @@
+package lastfm
+
+import (
+	"crypto/md5"
+	"fmt"
+	"net/url"
+	"testing"
+)
+
+func TestGetParamSignature(t *testing.T) {
+	params := url.Values{}
+	params.Add("ccc", "CCC")
+	params.Add("bbb", "BBB")
+	params.Add("aaa", "AAA")
+	params.Add("ddd", "DDD")
+	actual := getParamSignature(params, "secret")
+	expected := fmt.Sprintf("%x", md5.Sum([]byte(
+		"aaaAAAbbbBBBcccCCCdddDDDsecret",
+	)))
+	if actual != expected {
+		t.Errorf("expected %x, got %s", expected, actual)
+	}
+}