fix(data-extraction): Parse date from Gesellschaftsvertrag entry

src/aki_prj23_transparenzregister/utils/data_extraction/unternehmensregister/transform.py

@@ -367,6 +367,29 @@ def map_business_purpose(data: dict) -> str | None:
         return None
 
 
+def extract_date_from_string(value: str) -> str | None:
+    """Extract a date in ISO format from the given string if possible.
+
+    Args:
+        value (str): Input text
+
+    Returns:
+        str | None: Date in ISO format, None if not found
+    """
+    date_regex = [  # type: ignore
+        {"regex": r"\d{1,2}\.\d{1,2}\.\d{2,4}", "mapper": transform_date_to_iso},
+        {"regex": r"\d{4}-\d{1,2}-\d{1,2}", "mapper": None},
+    ]
+    for regex in date_regex:
+        result = re.findall(regex["regex"], value)  # type: ignore
+        if len(result) == 1:
+            relevant_data = result[0]
+            if regex["mapper"] is not None:  # type: ignore
+                return regex["mapper"](relevant_data)  # type: ignore
+            return relevant_data
+    return None
+
+
 def map_founding_date(data: dict) -> str | None:
     """Extracts the founding date from a given Unternehmensregister export.
 
@@ -392,9 +415,11 @@ def map_founding_date(data: dict) -> str | None:
         "Gruendungsmetadaten"
         in data["XJustiz_Daten"]["Fachdaten_Register"]["Basisdaten_Register"]
     ):
-        return data["XJustiz_Daten"]["Fachdaten_Register"]["Basisdaten_Register"][
+        return extract_date_from_string(
+            data["XJustiz_Daten"]["Fachdaten_Register"]["Basisdaten_Register"][
                 "Gruendungsmetadaten"
             ]["Gruendungsdatum"]
+        )
     # No reliable answer
     return None
 

tests/utils/data_extraction/unternehmensregister/transform_test.py

@@ -601,6 +601,21 @@ def test_map_business_purpose_no_result() -> None:
     assert result is None
 
 
+@pytest.mark.parametrize(
+    ("value", "expected_result"),
+    [
+        ("", None),
+        ("Tag der ersten Eintragung: 01.05.2004", "2004-05-01"),
+        ("Gesellschaftsvertrag vom 06.04.2016 Hallo Welt", "2016-04-06"),
+        ("Str. des Tests vom 1999-04-05", "1999-04-05"),
+        ("Once upon a midnight dreary while I pondered weak and weary...", None),
+    ],
+)
+def test_extract_date_from_string(value: str, expected_result: str) -> None:
+    result = transform.extract_date_from_string(value)
+    assert result == expected_result
+
+
 def test_map_founding_date_from_tag_der_ersten_eintragung() -> None:
     data = {
         "some entry": "Tag der ersten Eintragung: 01.05.2004",
@@ -626,7 +641,9 @@ def test_map_founding_date_from_gruendungsdatum() -> None:
         "XJustiz_Daten": {
             "Fachdaten_Register": {
                 "Basisdaten_Register": {
-                    "Gruendungsmetadaten": {"Gruendungsdatum": "1998-01-01"}
+                    "Gruendungsmetadaten": {
+                        "Gruendungsdatum": "Gesellschaftsvertrag vom 1998-01-01"
+                    }
                 }
             }
         }