n8n/packages/@n8n/nodes-langchain/utils/output_parsers/N8nOutputParser.ts

import type { IExecuteFunctions } from 'n8n-workflow';
import { NodeConnectionType } from 'n8n-workflow';

import { N8nItemListOutputParser } from './N8nItemListOutputParser';
import { N8nOutputFixingParser } from './N8nOutputFixingParser';
import { N8nStructuredOutputParser } from './N8nStructuredOutputParser';

export type N8nOutputParser =
	| N8nOutputFixingParser
	| N8nStructuredOutputParser
	| N8nItemListOutputParser;

export { N8nOutputFixingParser, N8nItemListOutputParser, N8nStructuredOutputParser };

export async function getOptionalOutputParsers(ctx: IExecuteFunctions): Promise<N8nOutputParser[]> {
	let outputParsers: N8nOutputParser[] = [];

	if (ctx.getNodeParameter('hasOutputParser', 0, true) === true) {
		outputParsers = (await ctx.getInputConnectionData(
			NodeConnectionType.AiOutputParser,
			0,
		)) as N8nOutputParser[];
	}

	return outputParsers;
}