clean and change type

cmd/backoffice/fileserver.go

@@ -41,12 +41,13 @@ func listCartFiles(dir string) ([]CartFileInfo, error) {
 			continue
 		}
 		name := e.Name()
-		var id int64
+		var idStr string
+		var id uint64
 		var parseErr error
 		parts := strings.Split(name, ".")
 		if len(parts) > 1 && parts[1] == "events" {
-			idStr := parts[0]
-			id, parseErr = strconv.ParseInt(idStr, 10, 64)
+			idStr = parts[0]
+			id, parseErr = strconv.ParseUint(idStr, 10, 64)
 		} else {
 			continue
 		}
@@ -59,7 +60,7 @@ func listCartFiles(dir string) ([]CartFileInfo, error) {
 			continue
 		}
 		out = append(out, CartFileInfo{
-			ID:       uint64(id),
+			ID:       idStr,
 			CartId:   cart.CartId(id),
 			Size:     info.Size(),
 			Modified: info.ModTime(),