security-alert-center/frontend/src/utils/hostPatchBus.ts

import type { HostDetail } from "../api";

type HostPatchListener = (detail: HostDetail) => void;

const listeners = new Set<HostPatchListener>();

export function subscribeHostPatch(listener: HostPatchListener): () => void {
  listeners.add(listener);
  return () => listeners.delete(listener);
}

export function emitHostPatch(detail: HostDetail): void {
  for (const listener of listeners) {
    listener(detail);
  }
}