Cost module web-ui can now:

- assign cost item products from Blender selection
- display list of selected products ( with available quantities, subtotals, and highlighting already assigned products)
- display and refresh assigned products
- highlight loaded cost schedule

src/ifcopenshell-python/ifcopenshell/util/cost.py

@@ -21,7 +21,7 @@ import ifcopenshell
 from typing import Optional, Union, Literal, Generator, Any
 import ifcopenshell.ifcopenshell_wrapper as ifcopenshell_wrapper
 from ifcopenshell.util.doc import get_predefined_type_doc
-
+from ifcopenshell.util.element import get_psets
 arithmetic_operator_symbols = {"ADD": "+", "DIVIDE": "/", "MULTIPLY": "*", "SUBTRACT": "-"}
 symbol_arithmetic_operators = {"+": "ADD", "/": "DIVIDE", "*": "MULTIPLY", "-": "SUBTRACT"}
 FILTER_BY_TYPE = Literal["PRODUCT", "RESOURCE", "PROCESS"]
@@ -240,11 +240,13 @@ def get_cost_item_assignments(
     if not is_deep:
         return get_cost_assignments_by_type(cost_item, filter_by_type)
     else:
-        return [
+        current_assignments = get_cost_assignments_by_type(cost_item, filter_by_type)
+        nested_assignments = [
             product
             for nested_cost_item in get_all_nested_cost_items(cost_item)
             for product in get_cost_assignments_by_type(nested_cost_item, filter_by_type)
         ]
+        return current_assignments + nested_assignments
 
 
 def get_cost_values(cost_item: ifcopenshell.entity_instance) -> list[dict[str, str]]:
@@ -285,6 +287,17 @@ def get_cost_schedule_types(file):
     return results
 
 
+def get_product_quantity_names(elements: list[ifcopenshell.entity_instance]) -> list[str]:
+    names = set()
+    for element in elements or []:
+        potential_names = set()
+        qtos = get_psets(element, qtos_only=True)
+        for qset, quantities in qtos.items():
+            potential_names.update(quantities.keys())
+        names = names.intersection(potential_names) if names else potential_names
+    return [n for n in names if n != "id"]
+
+
 class CostValueUnserialiser:
     def parse(self, formula: str):
         l = lark.Lark(