refactor: consolidate format validation into switch default

1 files changed, 2 insertions, 5 deletions

diff --git a/internal/media/process.go b/internal/media/process.go
index bb3ac89..ac94155 100644
--- a/internal/media/process.go
+++ b/internal/media/process.go
@@ -11,10 +11,6 @@ import (
 //
 // width <= 0 means no resize. format must be "webp" or "jpeg".
 func ConvertAndResize(src string, width int, format string) ([]byte, error) {
-	if format != "webp" && format != "jpeg" {
-		return nil, fmt.Errorf("unsupported format %q: must be webp or jpeg", format)
-	}
-
 	img, err := vips.NewImageFromFile(src)
 	if err != nil {
 		return nil, fmt.Errorf("load image %s: %w", src, err)
@@ -41,6 +37,7 @@ func ConvertAndResize(src string, width int, format string) ([]byte, error) {
 			return nil, fmt.Errorf("export jpeg: %w", err)
 		}
 		return buf, nil
+	default:
+		return nil, fmt.Errorf("unsupported format %q: must be webp or jpeg", format)
 	}
-	return nil, fmt.Errorf("unsupported format %q", format)
 }