use a switch/case for get mime

db/model.go

@@ -135,8 +135,7 @@ func (t *Track) AudioFilename() string {
 }
 
 func (t *Track) MIME() string {
-	v, _ := mime.FromExtension(t.Ext())
-	return v
+	return mime.FromExtension(t.Ext())
 }
 
 func (t *Track) AbsPath() string {
@@ -428,8 +427,7 @@ func (pe *PodcastEpisode) Ext() string {
 }
 
 func (pe *PodcastEpisode) MIME() string {
-	v, _ := mime.FromExtension(pe.Ext())
-	return v
+	return mime.FromExtension(pe.Ext())
 }
 
 type Bookmark struct {

mime/mime.go

@@ -1,16 +1,24 @@
 package mime
 
-func FromExtension(ext string) (string, bool) {
-	types := map[string]string{
-		"mp3":  "audio/mpeg",
-		"flac": "audio/x-flac",
-		"aac":  "audio/x-aac",
-		"m4a":  "audio/m4a",
-		"m4b":  "audio/m4b",
-		"ogg":  "audio/ogg",
-		"opus": "audio/ogg",
-		"wma":  "audio/x-ms-wma",
+func FromExtension(ext string) string {
+	switch ext {
+	case "mp3":
+		return "audio/mpeg"
+	case "flac":
+		return "audio/x-flac"
+	case "aac":
+		return "audio/x-aac"
+	case "m4a":
+		return "audio/m4a"
+	case "m4b":
+		return "audio/m4b"
+	case "ogg":
+		return "audio/ogg"
+	case "opus":
+		return "audio/ogg"
+	case "wma":
+		return "audio/x-ms-wma"
+	default:
+		return ""
 	}
-	v, ok := types[ext]
-	return v, ok
 }

podcasts/podcasts.go

@@ -235,8 +235,7 @@ func isAudio(mediaType, url string) bool {
 	if mediaType != "" && strings.HasPrefix(mediaType, "audio") {
 		return true
 	}
-	_, ok := gmime.FromExtension(filepath.Ext(url)[1:])
-	return ok
+	return gmime.FromExtension(filepath.Ext(url)[1:]) != ""
 }
 
 func itemToEpisode(podcastID, size, duration int, audio string,

scanner/scanner.go

@@ -277,7 +277,7 @@ func (s *Scanner) scanDir(tx *db.DB, c *Context, musicDir string, absPath string
 			cover = item.Name()
 			continue
 		}
-		if _, ok := mime.FromExtension(ext(item.Name())); ok {
+		if mime := mime.FromExtension(ext(item.Name())); mime != "" {
 			tracks = append(tracks, item.Name())
 			continue
 		}