From 02fd78df1433cb2dc465838fd5a0f29907c7158d Mon Sep 17 00:00:00 2001
From: Andrej730 <azhilenkov@gmail.com>
Date: Mon, 27 May 2024 17:18:44 +0500
Subject: [PATCH] datetime2ifc to support None values as it was before ebd03e9
 #4734

---
 .../ifcopenshell/util/date.py                 | 26 ++++++++++++++++---
 1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/src/ifcopenshell-python/ifcopenshell/util/date.py b/src/ifcopenshell-python/ifcopenshell/util/date.py
index e547e5dbbf..50352544f7 100644
--- a/src/ifcopenshell-python/ifcopenshell/util/date.py
+++ b/src/ifcopenshell-python/ifcopenshell/util/date.py
@@ -19,7 +19,7 @@
 import datetime
 from re import findall
 from dateutil import parser
-from typing import Literal, Union, Any
+from typing import Literal, Union, Any, overload
 
 try:
     import isodate
@@ -105,8 +105,11 @@ def readable_ifc_duration(string):
     return final_string
 
 
+@overload
+def datetime2ifc(dt: None, ifc_type: Any) -> None: ...
+@overload
 def datetime2ifc(
-    dt: Union[datetime.date, str],
+    dt: Union[datetime.date, str, None],
     ifc_type: Literal[
         "IfcDuration",
         "IfcTimeStamp",
@@ -116,7 +119,19 @@ def datetime2ifc(
         "IfcCalendarDate",
         "IfcLocalTime",
     ],
-) -> Union[int, str, dict[str, Any]]:
+) -> Union[int, str, dict[str, Any], None]: ...
+def datetime2ifc(
+    dt: Union[datetime.date, str, None],
+    ifc_type: Literal[
+        "IfcDuration",
+        "IfcTimeStamp",
+        "IfcDateTime",
+        "IfcDate",
+        "IfcTime",
+        "IfcCalendarDate",
+        "IfcLocalTime",
+    ],
+) -> Union[int, str, dict[str, Any], None]:
     if isinstance(dt, str):
         if ifc_type == "IfcDuration":
             return dt
@@ -124,6 +139,8 @@ def datetime2ifc(
             dt = datetime.datetime.fromisoformat(dt)
         except:
             dt = datetime.time.fromisoformat(dt)
+    elif dt is None:
+        return
 
     if ifc_type == "IfcDuration":
         return isodate.duration_isoformat(dt)
@@ -157,7 +174,8 @@ def datetime2ifc(
             "MinuteComponent": dt.minute,
             "SecondComponent": dt.second,
         }
-    raise TypeError(f"Unsupported ifc_type for conversion from datetime.datetime = {ifc_type}.")
+
+    raise TypeError(f"Unsupported ifc_type for conversion from datetime.datetime = {ifc_type}, value = {dt}")
 
 
 def string_to_date(string):