Implement Monlet MVP stack and UI updates

server/monlet_server/api/incidents.py

@@ -0,0 +1,53 @@
+from fastapi import APIRouter, Depends, HTTPException, Query
+from sqlalchemy import and_, or_, select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from ..cursors import decode, decode_datetime, encode
+from ..db import get_session
+from ..models import Incident as IncidentModel
+from ..schemas import Incident, IncidentsPage
+
+router = APIRouter()
+
+
+def _to_schema(i: IncidentModel) -> Incident:
+    return Incident(
+        id=str(i.id),
+        incident_key=i.incident_key,
+        state=i.state,
+        severity=i.severity,
+        agent_id=i.agent_id,
+        check_id=i.check_id,
+        opened_at=i.opened_at,
+        resolved_at=i.resolved_at,
+        summary=i.summary,
+    )
+
+
+@router.get("/incidents", response_model=IncidentsPage)
+async def list_incidents(
+    state: str | None = Query(default=None),
+    cursor: str | None = Query(default=None, max_length=512),
+    limit: int = Query(default=100, ge=1, le=500),
+    session: AsyncSession = Depends(get_session),
+) -> IncidentsPage:
+    if state is not None and state not in ("open", "resolved"):
+        raise HTTPException(status_code=400, detail="invalid state")
+    stmt = select(IncidentModel).order_by(IncidentModel.opened_at.desc(), IncidentModel.id.desc())
+    if state is not None:
+        stmt = stmt.where(IncidentModel.state == state)
+    if cursor is not None:
+        ts_str, last_id = decode(cursor, 2)
+        ts = decode_datetime(ts_str)
+        stmt = stmt.where(
+            or_(
+                IncidentModel.opened_at < ts,
+                and_(IncidentModel.opened_at == ts, IncidentModel.id < last_id),
+            )
+        )
+    rows = (await session.execute(stmt.limit(limit + 1))).scalars().all()
+    next_cursor = None
+    if len(rows) > limit:
+        rows = rows[:limit]
+        next_cursor = encode(rows[-1].opened_at.isoformat(), rows[-1].id)
+    return IncidentsPage(items=[_to_schema(r) for r in rows], next_cursor=next_cursor)