Implement Monlet MVP stack and UI updates

server/monlet_server/api/agents.py

@@ -0,0 +1,48 @@
+from fastapi import APIRouter, Depends, HTTPException, Query
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from ..cursors import decode, encode
+from ..db import get_session
+from ..models import Agent as AgentModel
+from ..schemas import Agent, AgentsPage
+
+router = APIRouter()
+
+
+def _to_schema(a: AgentModel) -> Agent:
+    return Agent(
+        agent_id=a.agent_id,
+        hostname=a.hostname,
+        status=a.status,
+        last_seen_at=a.last_seen_at,
+        features=a.features or {"push": False, "metrics": False},
+        labels=a.labels or {},
+    )
+
+
+@router.get("/agents", response_model=AgentsPage)
+async def list_agents(
+    cursor: str | None = Query(default=None, max_length=512),
+    limit: int = Query(default=100, ge=1, le=500),
+    session: AsyncSession = Depends(get_session),
+) -> AgentsPage:
+    stmt = select(AgentModel).order_by(AgentModel.agent_id)
+    if cursor is not None:
+        (last_id,) = decode(cursor, 1)
+        stmt = stmt.where(AgentModel.agent_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].agent_id)
+    return AgentsPage(items=[_to_schema(a) for a in rows], next_cursor=next_cursor)
+
+
+@router.get("/agents/{agent_id}", response_model=Agent)
+async def get_agent(agent_id: str, session: AsyncSession = Depends(get_session)) -> Agent:
+    res = await session.execute(select(AgentModel).where(AgentModel.agent_id == agent_id))
+    a = res.scalar_one_or_none()
+    if a is None:
+        raise HTTPException(status_code=404, detail="agent not found")
+    return _to_schema(a)