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

import {
	IExecuteFunctions,
} from 'n8n-core';
import {
	IDataObject,
	INodeTypeDescription,
	INodeExecutionData,
	INodeType,
} from 'n8n-workflow';
import {
	payoutOperations,
	payoutItemOperations,
	payoutFields,
	payoutItemFields,
} from './PaymentDescription';
import {
	IPaymentBatch,
	ISenderBatchHeader,
	IItem, IAmount,
	RecipientType,
	RecipientWallet,
 } from './PaymentInteface';
import {
	payPalApiRequest,
	payPalApiRequestAllItems,
	validateJSON,
 } from './GenericFunctions';

export class PayPal implements INodeType {
	description: INodeTypeDescription = {
		displayName: 'PayPal',
		name: 'payPal',
		icon: 'file:paypal.png',
		group: ['output'],
		version: 1,
		subtitle: '={{$parameter["operation"] + ": " + $parameter["resource"]}}',
		description: 'Consume PayPal API',
		defaults: {
			name: 'PayPal',
			color: '#356ae6',
		},
		inputs: ['main'],
		outputs: ['main'],
		credentials: [
			{
				name: 'payPalApi',
				required: true,
			}
		],
		properties: [
			{
				displayName: 'Resource',
				name: 'resource',
				type: 'options',
				options: [
					{
						name: 'Payout',
						value: 'payout',
					},
					{
						name: 'Payout Item',
						value: 'payoutItem',
					},
				],
				default: 'payout',
				description: 'Resource to consume.',
			},

			// Payout
			...payoutOperations,
			...payoutItemOperations,
			...payoutFields,
			...payoutItemFields,
		],
	};

	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
		const items = this.getInputData();
		const returnData: IDataObject[] = [];
		const length = items.length as unknown as number;
		let responseData;
		const qs: IDataObject = {};

		const resource = this.getNodeParameter('resource', 0) as string;
		const operation = this.getNodeParameter('operation', 0) as string;

		for (let i = 0; i < length; i++) {
			if (resource === 'payout') {
				if (operation === 'create') {
					const body: IPaymentBatch = {};
					const header: ISenderBatchHeader = {};
					const jsonActive = this.getNodeParameter('jsonParameters', i) as boolean;
					const senderBatchId = this.getNodeParameter('senderBatchId', i) as string;
					const additionalFields = this.getNodeParameter('additionalFields', i) as IDataObject;
					header.sender_batch_id = senderBatchId;
					if (additionalFields.emailSubject) {
						header.email_subject = additionalFields.emailSubject as string;
					}
					if (additionalFields.emailMessage) {
						header.email_message = additionalFields.emailMessage as string;
					}
					if (additionalFields.note) {
						header.note = additionalFields.note as string;
					}
					body.sender_batch_header = header;
					if (!jsonActive) {
						const payoutItems: IItem[] = [];
						const itemsValues = (this.getNodeParameter('itemsUi', i) as IDataObject).itemsValues as IDataObject[];
						if (itemsValues && itemsValues.length > 0) {
							itemsValues.forEach(o => {
								const payoutItem: IItem = {};
								const amount: IAmount = {};
								amount.currency = o.currency as string;
								amount.value = parseFloat(o.amount as string);
								payoutItem.amount = amount;
								payoutItem.note = o.note as string || '';
								payoutItem.receiver = o.receiverValue as string;
								payoutItem.recipient_type = o.recipientType as RecipientType;
								payoutItem.recipient_wallet = o.recipientWallet as RecipientWallet;
								payoutItem.sender_item_id = o.senderItemId as string || '';
								payoutItems.push(payoutItem);
							});
							body.items = payoutItems;
						} else {
							throw new Error('You must have at least one item.');
						}
					} else {
						const itemsJson = validateJSON(this.getNodeParameter('itemsJson', i) as string);
						body.items = itemsJson;
					}
					try {
						responseData = await payPalApiRequest.call(this, '/payments/payouts', 'POST', body);
					} catch (err) {
						throw new Error(`PayPal Error: ${JSON.stringify(err)}`);
					}
				}
				if (operation === 'get') {
					const payoutBatchId = this.getNodeParameter('payoutBatchId', i) as string;
					const returnAll = this.getNodeParameter('returnAll', 0) as boolean;
					try {
						if (returnAll === true) {
							responseData = await payPalApiRequestAllItems.call(this, 'items', `/payments/payouts/${payoutBatchId}`, 'GET', {}, qs);
						} else {
							qs.page_size = this.getNodeParameter('limit', i) as number;
							responseData = await payPalApiRequest.call(this, `/payments/payouts/${payoutBatchId}`, 'GET', {}, qs);
							responseData = responseData.items;
						}
					} catch (err) {
						throw new Error(`PayPal Error: ${JSON.stringify(err)}`);
					}
				}
			} else if (resource === 'payoutItem') {
				if (operation === 'get') {
					const payoutItemId = this.getNodeParameter('payoutItemId', i) as string;
					try {
						responseData = await payPalApiRequest.call(this,`/payments/payouts-item/${payoutItemId}`, 'GET', {}, qs);
					} catch (err) {
						throw new Error(`PayPal Error: ${JSON.stringify(err)}`);
					}
				}
				if (operation === 'cancel') {
					const payoutItemId = this.getNodeParameter('payoutItemId', i) as string;
					try {
						responseData = await payPalApiRequest.call(this,`/payments/payouts-item/${payoutItemId}/cancel`, 'POST', {}, qs);
					} catch (err) {
						throw new Error(`PayPal Error: ${JSON.stringify(err)}`);
					}
				}
			}
			if (Array.isArray(responseData)) {
				returnData.push.apply(returnData, responseData as IDataObject[]);
			} else {
				returnData.push(responseData as IDataObject);
			}
		}
		return [this.helpers.returnJsonArray(returnData)];
	}
}