WIP create aggregation module to manipulate aggregations. See #1222.

src/ifcblenderexport/blenderbim/bim/module/aggregate/operator.py

@@ -0,0 +1,47 @@
+import bpy
+import blenderbim.bim.module.aggregate.assign_object as assign_object
+from blenderbim.bim.ifc import IfcStore
+from blenderbim.bim.module.aggregate.data import Data
+
+
+class AssignObject(bpy.types.Operator):
+    bl_idname = "bim.assign_object"
+    bl_label = "Assign Object"
+
+    def execute(self, context):
+        self.file = IfcStore.get_file()
+        obj = bpy.context.active_object
+        props = obj.BIMObjectProperties
+        relating_object = props.relating_object
+        if not relating_object or not relating_object.BIMObjectProperties.ifc_definition_id:
+            return {"FINISHED"}
+        usecase = assign_object.Usecase(
+            self.file,
+            {
+                "product": self.file.by_id(props.ifc_definition_id),
+                "relating_object": self.file.by_id(relating_object.BIMObjectProperties.ifc_definition_id),
+            },
+        )
+        usecase.execute()
+        Data.load(props.ifc_definition_id)
+        bpy.ops.bim.disable_editing_aggregate()
+        return {"FINISHED"}
+
+
+class EnableEditingAggregate(bpy.types.Operator):
+    bl_idname = "bim.enable_editing_aggregate"
+    bl_label = "Enable Editing Aggregate"
+
+    def execute(self, context):
+        bpy.context.active_object.BIMObjectProperties.relating_object = None
+        bpy.context.active_object.BIMObjectProperties.is_editing_aggregate = True
+        return {"FINISHED"}
+
+
+class DisableEditingAggregate(bpy.types.Operator):
+    bl_idname = "bim.disable_editing_aggregate"
+    bl_label = "Disable Editing Aggregate"
+
+    def execute(self, context):
+        bpy.context.active_object.BIMObjectProperties.is_editing_aggregate = False
+        return {"FINISHED"}