Add warning task

jarvis_tasks/tasks/warning.py

@@ -0,0 +1,23 @@
+"""JARVIS warnings tasks."""
+import asyncio
+from datetime import datetime, timedelta
+
+from dis_snek import Snake
+from jarvis_core.db import q
+from jarvis_core.db.models import Warning
+
+
+async def unwarn(bot: Snake) -> None:
+    """
+    Deactivate warnings when they expire.
+
+    Args:
+        bot: Snake instance
+    """
+    while True:
+        asyncio.sleep(3600)
+        warns = Warning.find(q(active=True))
+        async for warn in warns:
+            if warn.created_at + timedelta(hours=warn.duration) < datetime.utcnow():
+                warn.update(q(active=False))
+                await warn.commit()