added reminder

backend/app/reminders/fire.py

@@ -0,0 +1,60 @@
+import logging
+from datetime import datetime, timezone
+
+from sqlalchemy import select
+from sqlalchemy.orm import Session
+
+from app.chat.notice_inbox import post_notice_to_latest_chat
+from app.db.models import Reminder
+from app.reminders.notify import bump_notify_seq
+from app.reminders.service import RECURRENCE_NONE, _advance_due, _format_local
+
+logger = logging.getLogger(__name__)
+
+
+def _utcnow() -> datetime:
+    return datetime.now(timezone.utc)
+
+
+def check_due_reminders(db: Session) -> int:
+    now = _utcnow()
+    stmt = (
+        select(Reminder)
+        .where(
+            Reminder.enabled.is_(True),
+            Reminder.completed_at.is_(None),
+            Reminder.due_at <= now,
+        )
+        .order_by(Reminder.due_at.asc())
+    )
+    rows = list(db.scalars(stmt).all())
+    fired = 0
+
+    for row in rows:
+        if row.last_fired_at and row.last_fired_at >= row.due_at:
+            continue
+
+        local_when = _format_local(row.due_at, row.timezone, all_day=row.all_day)
+        notice = f"📅 **Напоминание** · {row.title}\n\n_{local_when}_"
+        if row.notes:
+            notice += f"\n{row.notes}"
+
+        post_notice_to_latest_chat(notice)
+        row.last_fired_at = now
+
+        if row.recurrence == RECURRENCE_NONE:
+            row.completed_at = now
+            row.enabled = False
+        else:
+            row.due_at = _advance_due(row.due_at, row.recurrence)
+            row.last_fired_at = None
+
+        row.updated_at = now
+        fired += 1
+
+    if fired:
+        db.commit()
+        bump_notify_seq(db)
+        logger.info("Reminders fired: %d", fired)
+
+    return fired