feat: ping/DNS status and latency in hosts list and dashboard summary

fablednetmon/hosts/routes.py

@@ -1,8 +1,9 @@
 from __future__ import annotations
 from quart import Blueprint, render_template, request, redirect, url_for, current_app
-from sqlalchemy import select
+from sqlalchemy import select, func
 from fablednetmon.auth.middleware import require_role
 from fablednetmon.models.hosts import Host, ProbeType
+from fablednetmon.models.monitors import PingResult, DnsResult
 from fablednetmon.models.users import UserRole
 
 hosts_bp = Blueprint("hosts", __name__, url_prefix="/hosts")
@@ -14,7 +15,43 @@ async def list_hosts():
     async with current_app.db_sessionmaker() as db:
         result = await db.execute(select(Host).order_by(Host.name))
         hosts = result.scalars().all()
-    return await render_template("hosts/list.html", hosts=hosts)
+
+        # Latest ping result per host
+        latest_ping_subq = (
+            select(PingResult.host_id, func.max(PingResult.probed_at).label("max_at"))
+            .group_by(PingResult.host_id)
+            .subquery()
+        )
+        pr = await db.execute(
+            select(PingResult).join(
+                latest_ping_subq,
+                (PingResult.host_id == latest_ping_subq.c.host_id)
+                & (PingResult.probed_at == latest_ping_subq.c.max_at),
+            )
+        )
+        latest_pings = {r.host_id: r for r in pr.scalars()}
+
+        # Latest DNS result per host
+        latest_dns_subq = (
+            select(DnsResult.host_id, func.max(DnsResult.resolved_at).label("max_at"))
+            .group_by(DnsResult.host_id)
+            .subquery()
+        )
+        dr = await db.execute(
+            select(DnsResult).join(
+                latest_dns_subq,
+                (DnsResult.host_id == latest_dns_subq.c.host_id)
+                & (DnsResult.resolved_at == latest_dns_subq.c.max_at),
+            )
+        )
+        latest_dns = {r.host_id: r for r in dr.scalars()}
+
+    return await render_template(
+        "hosts/list.html",
+        hosts=hosts,
+        latest_pings=latest_pings,
+        latest_dns=latest_dns,
+    )
 
 
 @hosts_bp.get("/new")