chore: do not retry the model request if the user has aborted the request (#11224)

packages/core/src/utils/delay.ts

@@ -0,0 +1,48 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * Factory to create a standard abort error for delay helpers.
+ */
+export function createAbortError(): Error {
+  const abortError = new Error('Aborted');
+  abortError.name = 'AbortError';
+  return abortError;
+}
+
+/**
+ * Returns a promise that resolves after the provided duration unless aborted.
+ *
+ * @param ms Delay duration in milliseconds.
+ * @param signal Optional abort signal to cancel the wait early.
+ */
+export function delay(ms: number, signal?: AbortSignal): Promise<void> {
+  // If no abort signal is provided, set simple delay
+  if (!signal) {
+    return new Promise((resolve) => setTimeout(resolve, ms));
+  }
+
+  // Immediately reject if signal has already been aborted
+  if (signal.aborted) {
+    return Promise.reject(createAbortError());
+  }
+
+  // remove abort and timeout listeners to prevent memory-leaks
+  return new Promise((resolve, reject) => {
+    const onAbort = () => {
+      clearTimeout(timeoutId);
+      signal.removeEventListener('abort', onAbort);
+      reject(createAbortError());
+    };
+
+    const timeoutId = setTimeout(() => {
+      signal.removeEventListener('abort', onAbort);
+      resolve();
+    }, ms);
+
+    signal.addEventListener('abort', onAbort, { once: true });
+  });
+}