Improve application responsiveness and background processing

src/lib/server/pipeline/bus.ts

@@ -46,6 +46,7 @@ export type BetaStage =
 export type BetaState = 'running' | 'ready-promote' | 'promoted' | 'rolled-back';
 
 export type PipelineEvent =
+    | { type: 'fleet-invalidated' }
     | { type: 'server-telemetry'; entries: GameTelemetry[] }
     | { type: 'deployment-opened'; deploymentId: string; action: string; servers: string[] }
     | { type: 'server-changed'; deploymentId: string; server: string; files: number }
@@ -58,7 +59,7 @@ export type PipelineEvent =
           error: string | null;
       }
     | { type: 'sweep-tick'; frozen: boolean; reason?: string }
-    | { type: 'server-status'; entries: ServerStatusEntry[] }
+    | { type: 'server-status'; entries: ServerStatusEntry[]; delta?: boolean }
     | { type: 'beta-opened'; betaId: number; scriptIds: number[]; servers: string[] }
     | {
           type: 'beta-server-stage';
@@ -78,9 +79,17 @@ class Bus extends EventEmitter {
 }
 
 const bus = new Bus();
+let invalidationPending = false;
+export function invalidateFleet(): void {
+    if (invalidationPending) return;
+    invalidationPending = true;
+    // Flush after nested database transactions have committed.
+    queueMicrotask(() => { invalidationPending = false; bus.emit('event', { type: 'fleet-invalidated' }); });
+}
 
 export function emit(event: PipelineEvent): void {
     bus.emit('event', event);
+    if (event.type === 'beta-opened' || event.type === 'beta-state' || event.type === 'beta-server-stage') invalidateFleet();
 }
 
 export function subscribe(listener: (event: PipelineEvent) => void): () => void {