Demangle "Morgen" too

PFERD/ilias/date_demangler.py

@@ -4,14 +4,22 @@ Helper methods to demangle an ILIAS date.
 
 import datetime
 import locale
+import logging
 import re
+from typing import Optional
+
+from ..logging import PrettyLogger
+
+LOGGER = logging.getLogger(__name__)
+PRETTY = PrettyLogger(LOGGER)
 
 
-def demangle_date(date: str) -> datetime.datetime:
+def demangle_date(date: str) -> Optional[datetime.datetime]:
     """
     Demangle a given date in one of the following formats:
     "Gestern, HH:MM"
     "Heute, HH:MM"
+    "Morgen, HH:MM"
     "dd. mon.yyyy, HH:MM
     """
     saved = locale.setlocale(locale.LC_ALL)
@@ -21,10 +29,18 @@ def demangle_date(date: str) -> datetime.datetime:
         date = re.sub(r"\s+", " ", date)
         date = date.replace("Gestern", _yesterday().strftime("%d. %b %Y"))
         date = date.replace("Heute", datetime.date.today().strftime("%d. %b %Y"))
+        date = date.replace("Morgen", _tomorrow().strftime("%d. %b %Y"))
         return datetime.datetime.strptime(date, "%d. %b %Y, %H:%M")
+    except ValueError:
+        PRETTY.warning(f"Could not parse date {date!r}")
+        return None
     finally:
         locale.setlocale(locale.LC_ALL, saved)
 
 
 def _yesterday() -> datetime.date:
     return datetime.date.today() - datetime.timedelta(days=1)
+
+
+def _tomorrow() -> datetime.date:
+    return datetime.date.today() + datetime.timedelta(days=1)