first commit

packages/nodes-base/nodes/HelpScout/HelpScoutTrigger.node.ts

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+import { createHmac } from 'crypto';
+import type {
+	IHookFunctions,
+	IWebhookFunctions,
+	IDataObject,
+	INodeType,
+	INodeTypeDescription,
+	IWebhookResponseData,
+} from 'n8n-workflow';
+import { NodeConnectionTypes, randomString } from 'n8n-workflow';
+
+import { helpscoutApiRequest, helpscoutApiRequestAllItems } from './GenericFunctions';
+
+export class HelpScoutTrigger implements INodeType {
+	description: INodeTypeDescription = {
+		displayName: 'Help Scout Trigger',
+		name: 'helpScoutTrigger',
+		icon: 'file:helpScout.svg',
+		group: ['trigger'],
+		version: 1,
+		description: 'Starts the workflow when Help Scout events occur',
+		defaults: {
+			name: 'Help Scout Trigger',
+		},
+		inputs: [],
+		outputs: [NodeConnectionTypes.Main],
+		credentials: [
+			{
+				name: 'helpScoutOAuth2Api',
+				required: true,
+			},
+		],
+		webhooks: [
+			{
+				name: 'default',
+				httpMethod: 'POST',
+				responseMode: 'onReceived',
+				path: 'webhook',
+			},
+		],
+		properties: [
+			{
+				displayName: 'Events',
+				name: 'events',
+				type: 'multiOptions',
+				options: [
+					{
+						name: 'Conversation - Assigned',
+						value: 'convo.assigned',
+					},
+					{
+						name: 'Conversation - Created',
+						value: 'convo.created',
+					},
+					{
+						name: 'Conversation - Deleted',
+						value: 'convo.deleted',
+					},
+					{
+						name: 'Conversation - Merged',
+						value: 'convo.merged',
+					},
+					{
+						name: 'Conversation - Moved',
+						value: 'convo.moved',
+					},
+					{
+						name: 'Conversation - Status',
+						value: 'convo.status',
+					},
+					{
+						name: 'Conversation - Tags',
+						value: 'convo.tags',
+					},
+					{
+						name: 'Conversation Agent Reply - Created',
+						value: 'convo.agent.reply.created',
+					},
+					{
+						name: 'Conversation Customer Reply - Created',
+						value: 'convo.customer.reply.created',
+					},
+					{
+						name: 'Conversation Note - Created',
+						value: 'convo.note.created',
+					},
+					{
+						name: 'Customer - Created',
+						value: 'customer.created',
+					},
+					{
+						name: 'Rating - Received',
+						value: 'satisfaction.ratings',
+					},
+				],
+				default: [],
+				required: true,
+			},
+		],
+	};
+
+	webhookMethods = {
+		default: {
+			async checkExists(this: IHookFunctions): Promise<boolean> {
+				const webhookUrl = this.getNodeWebhookUrl('default');
+				const webhookData = this.getWorkflowStaticData('node');
+				const events = this.getNodeParameter('events') as string;
+
+				// Check all the webhooks which exist already if it is identical to the
+				// one that is supposed to get created.
+				const endpoint = '/v2/webhooks';
+				const data = await helpscoutApiRequestAllItems.call(
+					this,
+					'_embedded.webhooks',
+					'GET',
+					endpoint,
+					{},
+				);
+
+				for (const webhook of data) {
+					if (webhook.url === webhookUrl) {
+						for (const event of events) {
+							if (!webhook.events.includes(event) && webhook.state === 'enabled') {
+								return false;
+							}
+						}
+					}
+					// Set webhook-id to be sure that it can be deleted
+					webhookData.webhookId = webhook.id as string;
+					return true;
+				}
+				return false;
+			},
+			async create(this: IHookFunctions): Promise<boolean> {
+				const webhookData = this.getWorkflowStaticData('node');
+				const webhookUrl = this.getNodeWebhookUrl('default');
+				const events = this.getNodeParameter('events') as string;
+
+				const endpoint = '/v2/webhooks';
+
+				const body = {
+					url: webhookUrl,
+					events,
+					secret: randomString(10).toLowerCase(),
+				};
+
+				const responseData = await helpscoutApiRequest.call(
+					this,
+					'POST',
+					endpoint,
+					body,
+					{},
+					undefined,
+					{ resolveWithFullResponse: true },
+				);
+
+				if (responseData.headers['resource-id'] === undefined) {
+					// Required data is missing so was not successful
+					return false;
+				}
+
+				webhookData.webhookId = responseData.headers['resource-id'] as string;
+				webhookData.secret = body.secret;
+				return true;
+			},
+			async delete(this: IHookFunctions): Promise<boolean> {
+				const webhookData = this.getWorkflowStaticData('node');
+				if (webhookData.webhookId !== undefined) {
+					const endpoint = `/v2/webhooks/${webhookData.webhookId}`;
+					try {
+						await helpscoutApiRequest.call(this, 'DELETE', endpoint);
+					} catch (error) {
+						return false;
+					}
+
+					// Remove from the static workflow data so that it is clear
+					// that no webhooks are registered anymore
+					delete webhookData.webhookId;
+					delete webhookData.secret;
+				}
+				return true;
+			},
+		},
+	};
+
+	async webhook(this: IWebhookFunctions): Promise<IWebhookResponseData> {
+		const req = this.getRequestObject();
+		const bodyData = this.getBodyData();
+		const headerData = this.getHeaderData() as IDataObject;
+		const webhookData = this.getWorkflowStaticData('node');
+		if (headerData['x-helpscout-signature'] === undefined) {
+			return {};
+		}
+
+		const computedSignature = createHmac('sha1', webhookData.secret as string)
+			.update(req.rawBody)
+			.digest('base64');
+		if (headerData['x-helpscout-signature'] !== computedSignature) {
+			return {};
+		}
+		return {
+			workflowData: [this.helpers.returnJsonArray(bodyData)],
+		};
+	}
+}