Replace pendulum with aniso8601 for ISO8601 interval parsing

.github/workflows/test.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - "3.12"
+          - "3.13"
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}

aggrec/helpers.py

@@ -2,8 +2,8 @@
 import logging
 from datetime import datetime, timedelta, timezone
 
+import aniso8601
 import http_sf
-import pendulum
 from fastapi import HTTPException, Request, status
 from http_message_signatures import (
     HTTPMessageVerifier,
@@ -115,19 +115,5 @@ def rfc_3339_datetime_now() -> str:
 
 
 def parse_iso8601_interval(interval: str) -> tuple[datetime, timedelta]:
-    period = pendulum.parse(interval)
-    duration = period.start.diff(period.end).in_seconds()
-    return pendulum_as_datetime(period.start), timedelta(seconds=duration)
-
-
-def pendulum_as_datetime(dt: pendulum.DateTime) -> datetime:
-    return datetime(
-        year=dt.year,
-        month=dt.month,
-        day=dt.day,
-        hour=dt.hour,
-        minute=dt.minute,
-        second=dt.second,
-        microsecond=dt.microsecond,
-        tzinfo=dt.tzinfo,
-    )
+    t1, t2 = aniso8601.parse_interval(interval)
+    return t1, timedelta(seconds=(t2 - t1).total_seconds())

pyproject.toml

@@ -21,11 +21,11 @@ pydantic-settings = "^2.7.0"
 werkzeug = "^3.0.4"
 boto3 = "^1.26.133"
 aiomqtt = "^2.2.0"
-pendulum = "^3"
 pyyaml = "^6.0.1"
 http-sf = "^1.0.2"
 redis = "^5.1.1"
 aiobotocore = ">=2.15.2"
+aniso8601 = "^10.0.0"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^8.2.0"

tests/test_iso8601.py

@@ -7,3 +7,7 @@ def test_parse_iso8601_interval():
     start, duration = parse_iso8601_interval("2025-01-15T08:56:58+00:00/PT1M")
     assert start == datetime(year=2025, month=1, day=15, hour=8, minute=56, second=58, tzinfo=timezone.utc)
     assert duration.total_seconds() == 60
+
+    start, duration = parse_iso8601_interval("19840101T000000Z/19840115T000000Z")
+    assert start == datetime(year=1984, month=1, day=1, hour=0, minute=0, second=0, tzinfo=timezone.utc)
+    assert duration.total_seconds() == 14 * 24 * 60 * 60