n8n/packages/nodes-base/nodes/Emelia/EmeliaTrigger.node.ts

import {
	IHookFunctions,
	ILoadOptionsFunctions,
	INodePropertyOptions,
	INodeType,
	INodeTypeDescription,
	IWebhookFunctions,
	IWebhookResponseData,
} from 'n8n-workflow';

import {
	emeliaApiRequest,
	emeliaApiTest,
	emeliaGraphqlRequest,
} from './GenericFunctions';

interface Campaign {
	_id: string;
	name: string;
}

export class EmeliaTrigger implements INodeType {
	description: INodeTypeDescription = {
		displayName: 'Emelia Trigger',
		name: 'emeliaTrigger',
		icon: 'file:emelia.svg',
		subtitle: '={{$parameter["operation"] + ": " + $parameter["resource"]}}',
		group: ['trigger'],
		version: 1,
		description: 'Handle Emelia campaign activity events via webhooks',
		defaults: {
			name: 'Emelia Trigger',
		},
		inputs: [],
		outputs: ['main'],
		credentials: [
			{
				name: 'emeliaApi',
				required: true,
				testedBy: 'emeliaApiTest',
			},
		],
		webhooks: [
			{
				name: 'default',
				httpMethod: 'POST',
				responseMode: 'onReceived',
				path: 'webhook',
			},
		],
		properties: [
			{
				displayName: 'Campaign Name or ID',
				name: 'campaignId',
				type: 'options',
				description: 'Choose from the list, or specify an ID using an <a href="https://docs.n8n.io/nodes/expressions.html#expressions">expression</a>',
				typeOptions: {
					loadOptionsMethod: 'getCampaigns',
				},
				required: true,
				default: '',
			},
			{
				displayName: 'Events',
				name: 'events',
				type: 'multiOptions',
				required: true,
				default: [],
				options: [
					{
						name: 'Email Bounced',
						value: 'bounced',
					},
					{
						name: 'Email Opened',
						value: 'opened',
					},
					{
						name: 'Email Replied',
						value: 'replied',
					},
					{
						name: 'Email Sent',
						value: 'sent',
					},
					{
						name: 'Link Clicked',
						value: 'clicked',
					},
					{
						name: 'Unsubscribed Contact',
						value: 'unsubscribed',
					},
				],
			},
		],
	};

	methods = {
		credentialTest: {
			emeliaApiTest,
		},

		loadOptions: {
			async getCampaigns(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				const responseData = await emeliaGraphqlRequest.call(this, {
					query: `
					query GetCampaigns {
						campaigns {
							_id
							name
						}
					}`,
					operationName: 'GetCampaigns',
					variables: '{}',
				});

				return responseData.data.campaigns.map(
					(campaign: Campaign) => ({
						name: campaign.name,
						value: campaign._id,
					}),
				);
			},
		},
	};

	webhookMethods = {
		default: {
			async checkExists(this: IHookFunctions): Promise<boolean> {
				const webhookUrl = this.getNodeWebhookUrl('default') as string;
				const campaignId = this.getNodeParameter('campaignId') as string;
				const { webhooks } = await emeliaApiRequest.call(this, 'GET', '/webhook');
				for (const webhook of webhooks) {
					if (webhook.url === webhookUrl && webhook.campaignId === campaignId) {
						return true;
					}
				}

				return false;
			},
			async create(this: IHookFunctions): Promise<boolean> {
				const webhookUrl = this.getNodeWebhookUrl('default') as string;
				const webhookData = this.getWorkflowStaticData('node');
				const events = this.getNodeParameter('events') as string[];

				const campaignId = this.getNodeParameter('campaignId') as string;
				const body = {
					hookUrl: webhookUrl,
					events: events.map(e => e.toUpperCase()),
					campaignId,
				};

				const { webhookId } = await emeliaApiRequest.call(this, 'POST', '/webhook/webhook', body);
				webhookData.webhookId = webhookId;
				return true;
			},
			async delete(this: IHookFunctions): Promise<boolean> {
				const webhookData = this.getWorkflowStaticData('node');
				const webhookUrl = this.getNodeWebhookUrl('default') as string;
				const campaignId = this.getNodeParameter('campaignId') as string;

				try {
					const body = {
						hookUrl: webhookUrl,
						campaignId,
					};
					await emeliaApiRequest.call(this, 'DELETE', '/webhook/webhook', body);
				} catch (error) {
					return false;
				}

				delete webhookData.webhookId;
				return true;
			},
		},
	};

	async webhook(this: IWebhookFunctions): Promise<IWebhookResponseData> {
		const req = this.getRequestObject();
		return {
			workflowData: [
				this.helpers.returnJsonArray(req.body),
			],
		};
	}
}