⚡ Smaller changes and add wildcard-event

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

@@ -0,0 +1,201 @@
+import {
+	IHookFunctions,
+	IWebhookFunctions,
+  } from 'n8n-core';
+
+  import {
+	IDataObject,
+	INodeTypeDescription,
+	INodeType,
+	IWebhookResponseData,
+	ILoadOptionsFunctions,
+	INodePropertyOptions,
+  } from 'n8n-workflow';
+  import {
+	payPalApiRequest,
+	upperFist
+ } from './GenericFunctions';
+
+  export class PayPalTrigger implements INodeType {
+	description: INodeTypeDescription = {
+	  displayName: 'PayPal Trigger',
+	  name: 'PayPal',
+	  icon: 'file:paypal.png',
+	  group: ['trigger'],
+	  version: 1,
+	  description: 'Handle PayPal events via webhooks',
+	  defaults: {
+		name: 'PayPal Trigger',
+		color: '#32325d',
+	  },
+	  inputs: [],
+	  outputs: ['main'],
+	  credentials: [
+			  {
+				  name: 'payPalApi',
+				  required: true,
+			  }
+		  ],
+	  webhooks: [
+		{
+		  name: 'default',
+		  httpMethod: 'POST',
+		  reponseMode: 'onReceived',
+		  path: 'webhook',
+		},
+	  ],
+	  properties: [
+		{
+			displayName: 'Events',
+			name: 'events',
+			type: 'multiOptions',
+			required: true,
+			default: [],
+			description: 'The event to listen to.',
+			typeOptions: {
+				loadOptionsMethod: 'getEvents'
+			},
+			options: [],
+		},
+	  ],
+	};
+
+	methods = {
+		loadOptions: {
+			// Get all the events types to display them to user so that he can
+			// select them easily
+			async getEvents(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
+				const returnData: INodePropertyOptions[] = [
+					{
+						name: '*',
+						value: '*',
+						description: 'Any time any event is triggered (Wildcard Event).',
+					}
+				];
+				let events;
+				try {
+					const endpoint = '/notifications/webhooks-event-types';
+					events = await payPalApiRequest.call(this, endpoint, 'GET');
+				} catch (err) {
+					throw new Error(`PayPal Error: ${err}`);
+				}
+				for (const event of events.event_types) {
+					const eventName = upperFist(event.name);
+					const eventId = event.name;
+					const eventDescription = event.description;
+
+					returnData.push({
+						name: eventName,
+						value: eventId,
+						description: eventDescription,
+					});
+				}
+				return returnData;
+			},
+		},
+	};
+
+	// @ts-ignore (because of request)
+	webhookMethods = {
+		default: {
+			async checkExists(this: IHookFunctions): Promise<boolean> {
+				const webhookData = this.getWorkflowStaticData('node');
+				if (webhookData.webhookId === undefined) {
+					// No webhook id is set so no webhook can exist
+					return false;
+				}
+				const endpoint = `/notifications/webhooks/${webhookData.webhookId}`;
+				try {
+					await payPalApiRequest.call(this, endpoint, 'GET');
+				} catch (err) {
+					if (err.response && err.response.name === 'INVALID_RESOURCE_ID') {
+						// Webhook does not exist
+						delete webhookData.webhookId;
+						return false;
+					}
+					throw new Error(`PayPal Error: ${err}`);
+				}
+				return true;
+			},
+
+			async create(this: IHookFunctions): Promise<boolean> {
+				let webhook;
+				const webhookUrl = this.getNodeWebhookUrl('default');
+				const events = this.getNodeParameter('events', []) as string[];
+				const body = {
+					url: webhookUrl,
+					event_types: events.map(event => {
+						return { name: event };
+					 }),
+				};
+				const endpoint = '/notifications/webhooks';
+				try {
+					webhook = await payPalApiRequest.call(this, endpoint, 'POST', body);
+				} catch (e) {
+					throw e;
+				}
+
+				if (webhook.id === undefined) {
+					return false;
+				}
+				const webhookData = this.getWorkflowStaticData('node');
+				webhookData.webhookId = webhook.id as string;
+				return true;
+			},
+
+			async delete(this: IHookFunctions): Promise<boolean> {
+				const webhookData = this.getWorkflowStaticData('node');
+				if (webhookData.webhookId !== undefined) {
+					const endpoint = `/notifications/webhooks/${webhookData.webhookId}`;
+					try {
+						await payPalApiRequest.call(this, endpoint, 'DELETE', {});
+					} catch (e) {
+						return false;
+					}
+					delete webhookData.webhookId;
+				}
+				return true;
+			},
+		},
+	  };
+
+	async webhook(this: IWebhookFunctions): Promise<IWebhookResponseData> {
+		let webhook;
+		const webhookData = this.getWorkflowStaticData('node') as IDataObject;
+		const bodyData = this.getBodyData() as IDataObject;
+		const req = this.getRequestObject();
+		const headerData = this.getHeaderData() as IDataObject;
+		const endpoint = '/notifications/verify-webhook-signature';
+
+		if (headerData['PAYPAL-AUTH-ALGO'] !== undefined
+		&& headerData['PAYPAL-CERT-URL'] !== undefined
+		&& headerData['PAYPAL-TRANSMISSION-ID'] !== undefined
+		&& headerData['PAYPAL-TRANSMISSION-SIG'] !== undefined
+		&& headerData['PAYPAL-TRANSMISSION-TIME'] !== undefined) {
+			const body = {
+				auth_algo: headerData['PAYPAL-AUTH-ALGO'],
+				cert_url: headerData['PAYPAL-CERT-URL'],
+				transmission_id: headerData['PAYPAL-TRANSMISSION-ID'],
+				transmission_sig: headerData['PAYPAL-TRANSMISSION-SIG'],
+				transmission_time: headerData['PAYPAL-TRANSMISSION-TIME'],
+				webhook_id: webhookData.webhookId,
+				webhook_event: bodyData,
+			};
+			try {
+				webhook = await payPalApiRequest.call(this, endpoint, 'POST', body);
+			} catch (e) {
+				throw e;
+			}
+			if (webhook.verification_status !== 'SUCCESS') {
+				return {};
+			}
+		} else {
+			return {};
+		}
+		return {
+			workflowData: [
+				this.helpers.returnJsonArray(req.body)
+			],
+		};
+	}
+  }