n8n-enterprise-unlocked/packages/nodes-base/nodes/Microsoft/Outlook/v2/actions/draft/get.operation.ts

import type {
	IDataObject,
	IExecuteFunctions,
	INodeExecutionData,
	INodeProperties,
} from 'n8n-workflow';
import { messageFields, simplifyOutputMessages } from '../../helpers/utils';
import { downloadAttachments, microsoftApiRequest } from '../../transport';
import { updateDisplayOptions } from '@utils/utilities';
import { draftRLC } from '../../descriptions';

export const properties: INodeProperties[] = [
	draftRLC,
	{
		displayName: 'Output',
		name: 'output',
		type: 'options',
		default: 'simple',
		options: [
			{
				name: 'Simplified',
				value: 'simple',
			},
			{
				name: 'Raw',
				value: 'raw',
			},
			{
				name: 'Select Included Fields',
				value: 'fields',
			},
		],
	},
	{
		displayName: 'Fields',
		name: 'fields',
		type: 'multiOptions',
		description: 'The fields to add to the output',
		displayOptions: {
			show: {
				output: ['fields'],
			},
		},
		options: messageFields,
		default: [],
	},
	{
		displayName: 'Options',
		name: 'options',
		type: 'collection',
		placeholder: 'Add Option',
		default: {},
		options: [
			{
				displayName: 'Attachments Prefix',
				name: 'attachmentsPrefix',
				type: 'string',
				default: 'attachment_',
				description:
					'Prefix for name of the output fields to put the binary files data in. An index starting from 0 will be added. So if name is "attachment_" the first attachment is saved to "attachment_0".',
			},
			{
				displayName: 'Download Attachments',
				name: 'downloadAttachments',
				type: 'boolean',
				default: false,
				description:
					"Whether the message's attachments will be downloaded and included in the output",
			},
		],
	},
];

const displayOptions = {
	show: {
		resource: ['draft'],
		operation: ['get'],
	},
};

export const description = updateDisplayOptions(displayOptions, properties);

export async function execute(this: IExecuteFunctions, index: number) {
	let responseData;
	const qs: IDataObject = {};

	const draftId = this.getNodeParameter('draftId', index, undefined, {
		extractValue: true,
	}) as string;
	const options = this.getNodeParameter('options', index, {});
	const output = this.getNodeParameter('output', index) as string;

	if (output === 'fields') {
		const fields = this.getNodeParameter('fields', index) as string[];

		if (options.downloadAttachments) {
			fields.push('hasAttachments');
		}

		qs.$select = fields.join(',');
	}

	if (output === 'simple') {
		qs.$select =
			'id,conversationId,subject,bodyPreview,from,toRecipients,categories,hasAttachments';
	}

	responseData = await microsoftApiRequest.call(this, 'GET', `/messages/${draftId}`, undefined, qs);

	if (output === 'simple') {
		responseData = simplifyOutputMessages([responseData as IDataObject]);
	}

	let executionData: INodeExecutionData[] = [];

	if (options.downloadAttachments) {
		const prefix = (options.attachmentsPrefix as string) || 'attachment_';
		executionData = await downloadAttachments.call(this, responseData as IDataObject, prefix);
	} else {
		executionData = this.helpers.constructExecutionMetaData(
			this.helpers.returnJsonArray(responseData as IDataObject),
			{ itemData: { item: index } },
		);
	}

	return executionData;
}