From 88ae56806cd9892799f22aa8c1b79a0cc7f57f86 Mon Sep 17 00:00:00 2001
From: Junhan Chang <changjh@dp.tech>
Date: Sat, 18 Oct 2025 20:53:03 +0800
Subject: [PATCH] add layout serializer & converter

---
 unilabos/resources/itemized_carrier.py | 2 ++
 unilabos/ros/nodes/resource_tracker.py | 1 +
 2 files changed, 3 insertions(+)

diff --git a/unilabos/resources/itemized_carrier.py b/unilabos/resources/itemized_carrier.py
index ddda316f..5f1a93c9 100644
--- a/unilabos/resources/itemized_carrier.py
+++ b/unilabos/resources/itemized_carrier.py
@@ -74,6 +74,7 @@ class ItemizedCarrier(ResourcePLR):
     num_items_x: int = 0,
     num_items_y: int = 0,
     num_items_z: int = 0,
+    layout: str = "x-y",
     sites: Optional[Dict[Union[int, str], Optional[ResourcePLR]]] = None,
     category: Optional[str] = "carrier",
     model: Optional[str] = None,
@@ -405,6 +406,7 @@ class ItemizedCarrier(ResourcePLR):
       "num_items_x": self.num_items_x,
       "num_items_y": self.num_items_y,
       "num_items_z": self.num_items_z,
+      "layout": self.layout,
       "sites": [{
         "label": str(identifier),
         "visible": True if self[identifier] is not None else False,
diff --git a/unilabos/ros/nodes/resource_tracker.py b/unilabos/ros/nodes/resource_tracker.py
index 35d4529a..cd533aab 100644
--- a/unilabos/ros/nodes/resource_tracker.py
+++ b/unilabos/ros/nodes/resource_tracker.py
@@ -342,6 +342,7 @@ class ResourceTreeSet(object):
             pos = {
                 "size": {"width": d["size_x"], "height": d["size_y"], "depth": d["size_z"]},
                 "scale": {"x": 1.0, "y": 1.0, "z": 1.0},
+                "layout": d.get("layout", "x-y"),
                 "position": raw_pos,
                 "position3d": raw_pos,
                 "rotation": d["rotation"],