Don't use dateutil

inconnu/roleplay/search.py

@@ -4,8 +4,6 @@
 from datetime import datetime, timezone
 
 import discord
-from dateutil.parser import ParserError
-from dateutil.parser import parse as parse_dt
 from discord.ext.pages import Paginator
 from pymongo import DESCENDING
 
@@ -55,7 +53,7 @@ async def search(
             dt_query["$lt"] = before
         if dt_query:
             query["date"] = dt_query
-    except (ValueError, ParserError) as err:
+    except (ValueError, SyntaxError) as err:
         await inconnu.utils.error(ctx, err, title="Invalid date")
         return
 
@@ -119,18 +117,20 @@ def convert_dates(after: str, before: str) -> tuple[datetime, datetime]:
         ValueError if before is after after.
         ParserError if a datetime can't be inferred."""
 
-    def convert_tzs(dt: datetime) -> datetime:
+    def convert_tzs(dt: str | None) -> datetime:
         """If the datetime has a timezone, convert it to UTC and remove it."""
-        if dt.tzinfo is None:
-            return dt
-        return dt.astimezone(timezone.utc).replace(tzinfo=None)
-
-    # NOTE: In a future dateutil version, this will raise an exception if the
-    # timezone can't be inferred.
-    if after:
-        after = convert_tzs(parse_dt(after))
-    if before:
-        before = convert_tzs(parse_dt(before))
+        if dt is None:
+            return None
+        try:
+            dt = datetime.strptime(dt, "%Y%m%d")
+            if dt.tzinfo is None:
+                return dt
+            return dt.astimezone(timezone.utc).replace(tzinfo=None)
+        except ValueError as err:
+            raise SyntaxError(f"Invalid date: `{dt}`.\nAccepted format: YYYYMMDD.") from err
+
+    after = convert_tzs(after)
+    before = convert_tzs(before)
 
     if before and after:
         if before <= after:

pyproject.toml

@@ -31,7 +31,6 @@ fastapi = "^0.100.0"
 aiocache = "^0.12.1"
 py-cord = "^2.4.1"
 pyparsing = "^3.1.1"
-python-dateutil = "^2.8.2"
 
 [tool.poetry.dev-dependencies]
 debugpy = "^1.6.3"

tests/test_misc.py

@@ -124,13 +124,17 @@ def test_dyscrasias(res):
 @pytest.mark.parametrize(
     "after,before,exp_b,exp_a,error",
     [
-        ("2023-10-10", "2023-11-10", dt(2023, 10, 10), dt(2023, 11, 10), False),
-        ("2023-10-10", "2023-9-10", None, None, True),
+        (None, None, None, None, False),
+        (None, "20231110", None, dt(2023, 11, 10), False),
+        ("20231010", None, dt(2023, 10, 10), None, False),
+        ("20231010", "20231110", dt(2023, 10, 10), dt(2023, 11, 10), False),
+        ("20231010", "20230910", None, None, ValueError),  # Date mismatch
+        ("Bad date", "20231010", None, None, SyntaxError),
     ],
 )
-def test_convert_dates(after: str, before: str, exp_b: dt, exp_a: dt, error: bool):
+def test_convert_dates(after: str, before: str, exp_b: dt, exp_a: dt, error: Exception | None):
     if error:
-        with pytest.raises(ValueError):
+        with pytest.raises(error):
             b, a = convert_dates(after, before)
     else:
         b, a = convert_dates(after, before)