fix the way matrix audio mimetype handling works except dont break everything and also dont die (featuring gofmt!)

Author: Swirly

bridge/matrix/matrix.go

@@ -11,6 +11,7 @@ import (
 	"net/http"
 	"path"
 	"regexp"
+	"slices"
 	"strings"
 	"sync"
 	"time"
@@ -31,6 +32,8 @@ import (
 	"maunium.net/go/mautrix/id"
 )
 
+var Audio_MimeTypes = []string{"aac", "flac", "matroska", "mp4", "mpeg", "ogg", "opus", "vorbis", "wav"}
+
 var (
 	htmlTag            = regexp.MustCompile("</.*?>")
 	htmlReplacementTag = regexp.MustCompile("<[^>]*>")
@@ -932,7 +935,14 @@ func (b *Bmatrix) handleUploadFile(msg *config.Message, roomID id.RoomID, fi *co
 		if err != nil {
 			b.Log.Errorf("sendImage failed: %#v", err)
 		}
-	case strings.Contains(mtype, "audio") && regexp.MustCompile(`(aac|flac|matroska|mp4|mpeg|ogg|opus|vorbis|wav)$`).MatchString(mtype): // god this is such a hack
+	case func() bool {
+		if strings.HasPrefix(mtype, "audio/") {
+			s, _ := strings.CutPrefix(mtype, "audio/")
+			return slices.Contains(Audio_MimeTypes, s)
+		} else {
+			return false
+		}
+	}():
 		b.Log.Debugf("sendAudio %s", res.ContentURI)
 		err = b.retry(func() error {
 			content := event.MessageEventContent{