fix tier loop

types/types.go

@@ -129,6 +129,7 @@ type (
 		Label    string          `json:"label"`
 		Value    T               `json:"value"`
 		Parent   T               `json:"-"`
+		Used     bool            `json:"-"`
 		Children []*TierValue[T] `json:"children"`
 	}
 

utils.go

@@ -48,11 +48,20 @@ func isEmpty(val any) bool {
 
 func recursiveTier[T any](parent T, values []*types.TierValue[T]) []*types.TierValue[T] {
 	items := make([]*types.TierValue[T], 0, len(values)/2)
-	for _, row := range values {
+	for idx, row := range values {
+		if row.Used {
+			continue
+		}
 		if reflect.DeepEqual(row.Parent, parent) {
+			values[idx].Used = true
 			row.Children = recursiveTier(row.Value, values)
 			items = append(items, row)
 		}
 	}
+	for _, row := range values {
+		if !row.Used {
+			items = append(items, row)
+		}
+	}
 	return items
 }