Fix IfcOpeningElement using wrong geometry context

When creating an IfcOpeningElement via AddElement, the context
was read from props.contexts which could accidentally or intentionally through previous operation be set to
IfcGeometricRepresentationContext ("Model") rather than the
Body subcontext ("Model/Body/MODEL_VIEW"). The boolean engine
only searches subcontexts for opening geometry, so the void
was silently never applied.

Fix: always resolve Model/Body/MODEL_VIEW directly from the
IFC file when the class is IfcOpeningElement, bypassing the
context dropdown entirely.

Also add warnings in AddOpening when the opening has no Body
representation, and when switch_representation produces no
IfcBooleanResult after the opening is applied.

Generated with the assistance of an AI coding tool.

src/bonsai/bonsai/bim/module/root/operator.py

@@ -27,6 +27,7 @@ import ifcopenshell.api.material
 import ifcopenshell.api.pset
 import ifcopenshell.api.root
 import ifcopenshell.util.element
+import ifcopenshell.util.representation
 import ifcopenshell.util.schema
 import ifcopenshell.util.shape_builder
 import ifcopenshell.util.type
@@ -530,7 +531,13 @@ class AddElement(bpy.types.Operator, tool.Ifc.Operator):
             return self.report({"WARNING"}, "A featured element must be nominated.")
 
         ifc_context = None
-        if get_enum_items(props, "contexts", context):
+        if props.ifc_class == "IfcOpeningElement":
+            ifc_context = ifcopenshell.util.representation.get_context(tool.Ifc.get(), "Model", "Body", "MODEL_VIEW")
+            if ifc_context is None:
+                ifc_context = ifcopenshell.util.representation.get_context(tool.Ifc.get(), "Model", "Body")
+            if ifc_context is None:
+                self.report({"WARNING"}, "No Model/Body context found. Opening representation may be on the wrong context.")
+        elif get_enum_items(props, "contexts", context):
             ifc_context = int(props.contexts or "0") or None
             if ifc_context:
                 ifc_context = tool.Ifc.get().by_id(ifc_context)

src/bonsai/bonsai/bim/module/void/operator.py

@@ -156,6 +156,14 @@ class AddOpening(bpy.types.Operator, tool.Ifc.Operator):
                     should_add_representation=True,
                     context=body_context,
                 )
+            if element2:
+                opening_body_rep = ifcopenshell.util.representation.get_representation(element2, "Model", "Body")
+                if opening_body_rep is None:
+                    self.report(
+                        {"WARNING"},
+                        f"Opening '{element2.Name}' has no Body representation — void will not be cut. "
+                        f"Check its context in the IFC file (ContextIdentifier must be 'Body').",
+                    )
             ifcopenshell.api.feature.add_feature(tool.Ifc.get(), feature=element2, element=element1)
 
             if tool.Ifc.is_moved(obj2):