Initial commit to release

packages/nodes-base/nodes/Asana/AsanaTrigger.node.ts

@@ -0,0 +1,184 @@
+import {
+	IHookFunctions,
+	IWebhookFunctions,
+} from 'n8n-core';
+
+import {
+	IDataObject,
+	INodeTypeDescription,
+	INodeType,
+	IWebhookResonseData,
+} from 'n8n-workflow';
+
+import {
+	asanaApiRequest,
+} from './GenericFunctions';
+
+import { createHmac } from 'crypto';
+
+export class AsanaTrigger implements INodeType {
+	description: INodeTypeDescription = {
+		displayName: 'Asana Trigger',
+		name: 'asanaTrigger',
+		icon: 'file:asana.png',
+		group: ['trigger'],
+		version: 1,
+		description: 'Starts the workflow when Asana events occure.',
+		defaults: {
+			name: 'Asana Trigger',
+			color: '#559922',
+		},
+		inputs: [],
+		outputs: ['main'],
+		credentials: [
+			{
+				name: 'asanaApi',
+				required: true,
+			}
+		],
+		webhooks: [
+			{
+				name: 'default',
+				httpMethod: 'POST',
+				reponseMode: 'onReceived',
+				path: 'webhook',
+			},
+		],
+		properties: [
+			{
+				displayName: 'Resource',
+				name: 'resource',
+				type: 'string',
+				default: '',
+				required: true,
+				description: 'The resource ID to subscribe to. The resource can be a task or project.',
+			},
+		],
+
+	};
+
+	// @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;
+				}
+
+				// Webhook got created before so check if it still exists
+				const endpoint = `webhooks/${webhookData.webhookId}`;
+
+				try {
+					await asanaApiRequest.call(this, 'GET', endpoint, {});
+				} catch (e) {
+					if (e.statusCode === 404) {
+						// Webhook does not exist
+						delete webhookData.webhookId;
+
+						return false;
+					}
+
+					// Some error occured
+					throw e;
+				}
+
+				// If it did not error then the webhook exists
+				return true;
+			},
+			async create(this: IHookFunctions): Promise<boolean> {
+				const webhookUrl = this.getNodeWebhookUrl('default');
+
+				const resource = this.getNodeParameter('resource') as string;
+
+				const endpont = `webhooks`;
+
+				const body = {
+					resource,
+					target: webhookUrl,
+				};
+
+				const responseData = await asanaApiRequest.call(this, 'POST', endpont, body);
+
+				if (responseData.data === undefined || responseData.data.id === undefined) {
+					// Required data is missing so was not successful
+					return false;
+				}
+
+				const webhookData = this.getWorkflowStaticData('node');
+				webhookData.webhookId = responseData.data.id as string;
+
+				return true;
+			},
+			async delete(this: IHookFunctions): Promise<boolean> {
+				const webhookData = this.getWorkflowStaticData('node');
+
+				if (webhookData.webhookId !== undefined) {
+					const endpoint = `webhooks/${webhookData.webhookId}`;
+					const body = {};
+
+					try {
+						await asanaApiRequest.call(this, 'DELETE', endpoint, body);
+					} catch (e) {
+						return false;
+					}
+
+					// Remove from the static workflow data so that it is clear
+					// that no webhooks are registred anymore
+					delete webhookData.webhookId;
+					delete webhookData.webhookEvents;
+				}
+
+				return true;
+			},
+		},
+	};
+
+
+
+	async webhook(this: IWebhookFunctions): Promise<IWebhookResonseData> {
+		const bodyData = this.getBodyData() as IDataObject;
+		const headerData = this.getHeaderData() as IDataObject;
+		const req = this.getRequestObject();
+
+		const webhookData = this.getWorkflowStaticData('node') as IDataObject;
+
+
+		if (headerData['x-hook-secret'] !== undefined) {
+			// Is a create webhook confirmation request
+			webhookData.hookSecret = headerData['x-hook-secret'];
+
+			const res = this.getResponseObject();
+			res.set('X-Hook-Secret', webhookData.hookSecret as string);
+			res.status(200).end();
+			return {
+				noWebhookResponse: true,
+			};
+		}
+
+		// Is regular webhook call
+		// Check if it contains any events
+		if (bodyData.events === undefined || !Array.isArray(bodyData.events) ||
+			bodyData.events.length === 0) {
+			// Does not contain any event data so nothing to process so no reason to
+			// start the workflow
+			return {};
+		}
+
+		// Check if the request is valid
+		// (if the signature matches to data and hookSecret)
+		const computedSignature = createHmac("sha256", webhookData.hookSecret as string).update(JSON.stringify(req.body)).digest("hex");
+		if (headerData['x-hook-signature'] !== computedSignature) {
+			// Signature is not valid so ignore call
+			return {};
+		}
+
+		return {
+			workflowData: [
+				this.helpers.returnJsonArray(req.body)
+			],
+		};
+	}
+}