Function enqueueCommand

examples/pdf-server/server.ts:420–436

(viewUUID: string, command: PdfCommand)

setInterval(pruneStaleQueues, SWEEP_INTERVAL_MS).unref();

function enqueueCommand(viewUUID: string, command: PdfCommand): void {
  let entry = commandQueues.get(viewUUID);
  if (!entry) {
    entry = { commands: [], lastActivity: Date.now() };
    commandQueues.set(viewUUID, entry);
  }
  entry.commands.push(command);
  entry.lastActivity = Date.now();
  touchView(viewUUID);

  // Wake up any long-polling request waiting for this viewUUID
  const waiter = pollWaiters.get(viewUUID);
  if (waiter) {
    pollWaiters.delete(viewUUID);
    waiter();
  }
}

function dequeueCommands(viewUUID: string): PdfCommand[] {
  // Poll is activity — keep the view alive even when the queue is empty