Show instance and player counts on hosts

src/lib/server/hosts/overview.ts

@@ -1,16 +1,29 @@
 import { db } from '../db/index.js';
 import { listHosts } from './index.js';
 import { presentHostPreparation } from './preparation.js';
+import { observationReader } from '../fleet/status.js';
+import type { ServerRow } from '../fleet/servers.js';
 import type { Host } from '../../hosts.js';
 
-export interface HostOverview extends Host { serverCount: number }
+export interface HostOverview extends Host { serverCount: number; playerCount: number; unreportedInstances: number }
 
-/** Count assigned servers without loading their telemetry or historical placements. */
+/** Read current placements once and use the fleet's shared telemetry/RCON selection. */
 export function hostOverview(): HostOverview[] {
     const hosts = listHosts();
-    const counts = new Map((db().prepare(`SELECT i.host_id, COUNT(*) AS count FROM native_instances i
+    const instances = db().prepare(`SELECT s.*, i.host_id FROM native_instances i
         JOIN servers s ON s.name = i.server
-        WHERE i.retired_at IS NULL AND s.destroyed_at IS NULL
-        GROUP BY i.host_id`).all() as { host_id: string; count: number }[]).map(row => [row.host_id, row.count]));
-    return hosts.map(host => ({ ...presentHostPreparation(host), serverCount: counts.get(host.id) ?? 0 }));
+        WHERE i.retired_at IS NULL AND s.destroyed_at IS NULL`).all() as (ServerRow & { host_id: string })[];
+    const counts = new Map<string, { serverCount: number; playerCount: number; unreportedInstances: number }>();
+    if (instances.length) {
+        const observe = observationReader();
+        for (const instance of instances) {
+            const count = counts.get(instance.host_id) ?? { serverCount: 0, playerCount: 0, unreportedInstances: 0 };
+            count.serverCount++;
+            const observation = observe(instance);
+            if (observation.health === 'online' && observation.last_players !== null) count.playerCount += observation.last_players;
+            else count.unreportedInstances++;
+            counts.set(instance.host_id, count);
+        }
+    }
+    return hosts.map(host => ({ ...presentHostPreparation(host), ...(counts.get(host.id) ?? { serverCount: 0, playerCount: 0, unreportedInstances: 0 }) }));
 }