feat(backend): SSE hub with pending-widget re-emit on (re)subscribe

2026-06-27 21:10:48 +02:00
parent f4c6126270
commit 39eb35116e
2 changed files with 29 additions and 0 deletions
@@ -0,0 +1,13 @@
+type Send = (event: string, data: object) => void;
+export class SseHub {
+  private subs = new Map<string, Set<Send>>();
+  subscribe(sessionId: string, send: Send, pending?: object | null): () => void {
+    if (!this.subs.has(sessionId)) this.subs.set(sessionId, new Set());
+    this.subs.get(sessionId)!.add(send);
+    if (pending) send("ui_request", { ui_request: pending });
+    return () => this.subs.get(sessionId)?.delete(send);
+  }
+  publish(sessionId: string, event: string, data: object): void {
+    for (const s of this.subs.get(sessionId) ?? []) s(event, data);
+  }
+}