Function waitForPageData

examples/pdf-server/server.ts:230–249

* Wait for the viewer to render and submit page data. * Rejects on timeout or when the interact request is aborted upstream.

(
  requestId: string,
  signal?: AbortSignal,
)

 * Rejects on timeout or when the interact request is aborted upstream.
 */
function waitForPageData(
  requestId: string,
  signal?: AbortSignal,
): Promise<PageDataEntry[]> {
  return new Promise<PageDataEntry[]>((resolve, reject) => {
    const settle = (v: PageDataEntry[] | Error) => {
      clearTimeout(timer);
      signal?.removeEventListener("abort", onAbort);
      pendingPageRequests.delete(requestId);
      v instanceof Error ? reject(v) : resolve(v);
    };
    const onAbort = () => settle(new Error("interact request cancelled"));
    const timer = setTimeout(
      () => settle(new Error("Timeout waiting for page data from viewer")),
      GET_PAGES_TIMEOUT_MS,
    );
    signal?.addEventListener("abort", onAbort);
    pendingPageRequests.set(requestId, settle);
  });
}

/**
 * Wait for the viewer's first poll_pdf_commands call.