n8n/packages/nodes-base/nodes/Dhl/Dhl.node.ts

import type {
	IExecuteFunctions,
	ICredentialDataDecryptedObject,
	ICredentialsDecrypted,
	ICredentialTestFunctions,
	IDataObject,
	INodeCredentialTestResult,
	INodeExecutionData,
	INodeType,
	INodeTypeDescription,
} from 'n8n-workflow';

import { dhlApiRequest, validateCredentials } from './GenericFunctions';

export class Dhl implements INodeType {
	description: INodeTypeDescription = {
		displayName: 'DHL',
		name: 'dhl',
		icon: 'file:dhl.svg',
		group: ['input'],
		version: 1,
		subtitle: '={{$parameter["operation"] + ": " + $parameter["resource"]}}',
		description: 'Consume DHL API',
		defaults: {
			name: 'DHL',
		},
		inputs: ['main'],
		outputs: ['main'],
		credentials: [
			{
				name: 'dhlApi',
				required: true,
				testedBy: 'dhlApiCredentialTest',
			},
		],
		properties: [
			{
				displayName: 'Resource',
				name: 'resource',
				noDataExpression: true,
				type: 'hidden',
				options: [
					{
						name: 'Shipment',
						value: 'shipment',
					},
				],
				default: 'shipment',
			},
			{
				displayName: 'Operation',
				name: 'operation',
				type: 'options',
				noDataExpression: true,
				displayOptions: {
					show: {
						resource: ['shipment'],
					},
				},
				options: [
					{
						name: 'Get Tracking Details',
						value: 'get',
						action: 'Get tracking details for a shipment',
					},
				],
				default: 'get',
			},
			{
				displayName: 'Tracking Number',
				name: 'trackingNumber',
				type: 'string',
				required: true,
				default: '',
			},
			{
				displayName: 'Options',
				name: 'options',
				type: 'collection',
				placeholder: 'Add option',
				default: {},
				options: [
					{
						displayName: "Recipient's Postal Code",
						name: 'recipientPostalCode',
						type: 'string',
						default: '',
						description:
							"DHL will return more detailed information on the shipment when you provide the Recipient's Postal Code - it acts as a verification step",
					},
				],
			},
		],
	};

	methods = {
		credentialTest: {
			async dhlApiCredentialTest(
				this: ICredentialTestFunctions,
				credential: ICredentialsDecrypted,
			): Promise<INodeCredentialTestResult> {
				try {
					await validateCredentials.call(this, credential.data as ICredentialDataDecryptedObject);
				} catch (error) {
					if (error.statusCode === 401) {
						return {
							status: 'Error',
							message: 'The API Key included in the request is invalid',
						};
					}
				}

				return {
					status: 'OK',
					message: 'Connection successful!',
				};
			},
		},
	};

	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
		const items = this.getInputData();
		const returnData: IDataObject[] = [];
		let qs: IDataObject = {};
		let responseData;
		const resource = this.getNodeParameter('resource', 0);
		const operation = this.getNodeParameter('operation', 0);

		for (let i = 0; i < items.length; i++) {
			try {
				if (resource === 'shipment') {
					if (operation === 'get') {
						const trackingNumber = this.getNodeParameter('trackingNumber', i) as string;
						const options = this.getNodeParameter('options', i);

						qs = {
							trackingNumber,
						};

						Object.assign(qs, options);

						responseData = await dhlApiRequest.call(this, 'GET', '/track/shipments', {}, qs);

						returnData.push(...(responseData.shipments as IDataObject[]));
					}
				}
			} catch (error) {
				if (this.continueOnFail(error)) {
					returnData.push({ error: error.description });
					continue;
				}
				throw error;
			}
		}
		return [this.helpers.returnJsonArray(returnData)];
	}
}