add sys to se what we get

cmd/backoffice/fileserver.go

@@ -27,6 +27,21 @@ func NewFileServer(dataDir string) *FileServer {
 	}
 }
 
+func isValidFileId(name string) (uint64, bool) {
+
+	parts := strings.Split(name, ".")
+	if len(parts) > 1 && parts[1] == "events" {
+		idStr := parts[0]
+		if _, err := strconv.ParseUint(idStr, 10, 64); err != nil {
+			return 0, false
+		}
+		if id, err := strconv.ParseUint(idStr, 10, 64); err == nil {
+			return id, true
+		}
+	}
+	return 0, false
+}
+
 func listCartFiles(dir string) ([]CartFileInfo, error) {
 	entries, err := os.ReadDir(dir)
 	if err != nil {
@@ -40,18 +55,8 @@ func listCartFiles(dir string) ([]CartFileInfo, error) {
 		if e.IsDir() {
 			continue
 		}
-		name := e.Name()
-		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.ParseUint(idStr, 10, 64)
-		} else {
-			continue
-		}
-		if parseErr != nil {
+		id, valid := isValidFileId(e.Name())
+		if !valid {
 			continue
 		}
 
@@ -59,11 +64,13 @@ func listCartFiles(dir string) ([]CartFileInfo, error) {
 		if err != nil {
 			continue
 		}
+		info.Sys()
 		out = append(out, CartFileInfo{
-			ID:       idStr,
+			ID:       fmt.Sprintf("%d", id),
 			CartId:   cart.CartId(id),
 			Size:     info.Size(),
 			Modified: info.ModTime(),
+			System:   info.Sys(),
 		})
 	}
 	return out, nil

cmd/backoffice/main.go

@@ -21,6 +21,7 @@ type CartFileInfo struct {
 	CartId   cart.CartId `json:"cartId"`
 	Size     int64       `json:"size"`
 	Modified time.Time   `json:"modified"`
+	System   any         `json:"system"`
 }
 
 func envOrDefault(key, def string) string {