first commit

packages/@n8n/nodes-langchain/nodes/vendors/OpenAi/helpers/polling.ts

@@ -0,0 +1,38 @@
+import type { IExecuteFunctions } from 'n8n-workflow';
+import { NodeApiError } from 'n8n-workflow';
+
+export async function pollUntilAvailable<TResponse>(
+	ctx: IExecuteFunctions,
+	request: () => Promise<TResponse>,
+	check: (response: TResponse) => boolean,
+	timeoutSeconds: number,
+	intervalSeconds = 5,
+): Promise<TResponse> {
+	const abortSignal = ctx.getExecutionCancelSignal();
+	let response: TResponse | undefined;
+	const startTime = Date.now();
+
+	while (!response || !check(response)) {
+		const elapsedTime = Date.now() - startTime;
+		if (elapsedTime >= timeoutSeconds * 1000) {
+			throw new NodeApiError(ctx.getNode(), {
+				message: 'Timeout reached',
+				code: 500,
+			});
+		}
+
+		if (abortSignal?.aborted) {
+			throw new NodeApiError(ctx.getNode(), {
+				message: 'Execution was cancelled',
+				code: 500,
+			});
+		}
+
+		response = await request();
+
+		// Wait before the next polling attempt
+		await new Promise((resolve) => setTimeout(resolve, intervalSeconds * 1000));
+	}
+
+	return response;
+}