feat(Perplexity Node): New node (#13604)

packages/nodes-base/nodes/Perplexity/GenericFunctions.ts

@@ -0,0 +1,41 @@
+import type {
+	IExecuteSingleFunctions,
+	IN8nHttpFullResponse,
+	INodeExecutionData,
+	JsonObject,
+} from 'n8n-workflow';
+import { NodeApiError } from 'n8n-workflow';
+
+export async function sendErrorPostReceive(
+	this: IExecuteSingleFunctions,
+	data: INodeExecutionData[],
+	response: IN8nHttpFullResponse,
+): Promise<INodeExecutionData[]> {
+	if (String(response.statusCode).startsWith('4') || String(response.statusCode).startsWith('5')) {
+		const errorBody = response.body as JsonObject;
+		const error = (errorBody?.error ?? {}) as JsonObject;
+
+		const errorMessage =
+			typeof error.message === 'string'
+				? error.message
+				: (response.statusMessage ?? 'An unexpected issue occurred');
+		const errorType = typeof error.type === 'string' ? error.type : 'UnknownError';
+		const itemIndex = typeof error.itemIndex === 'number' ? `[Item ${error.itemIndex}]` : '';
+
+		if (errorType === 'invalid_model') {
+			throw new NodeApiError(this.getNode(), errorBody, {
+				message: 'Invalid model',
+				description:
+					'The model is not valid. Permitted models can be found in the documentation at https://docs.perplexity.ai/guides/model-cards.',
+			});
+		}
+
+		// Fallback for other errors
+		throw new NodeApiError(this.getNode(), response as unknown as JsonObject, {
+			message: `${errorMessage}${itemIndex ? ' ' + itemIndex : ''}.`,
+			description:
+				'Any optional system messages must be sent first, followed by alternating user and assistant messages. For more details, refer to the API documentation: https://docs.perplexity.ai/api-reference/chat-completions',
+		});
+	}
+	return data;
+}