✨ Add Wufoo-Trigger node (#597)

* Generic functions, credentials, interface, logo, triggernode

* TSLint tabs rule, request error handling, webhook done

On hold until Wufoo responds with sandbox account

* Removed test logging, fixed various errors, cleaned up

* Sorted imports, adjusted data display,  removed anys, tslint import sort rule

* RAAAAAW data

* ⚡ Fix logo and improve formatting

* ⚡ Improvements

* ⚡ Minor improvements to WuFoo-Trigger

Co-authored-by: Rupenieks <ru@myos,co>
Co-authored-by: ricardo <ricardoespinoza105@gmail.com>
Co-authored-by: Jan Oberhauser <jan.oberhauser@gmail.com>

packages/nodes-base/nodes/Wufoo/WufooTrigger.node.ts

@@ -0,0 +1,248 @@
+import {
+	IHookFunctions,
+	IWebhookFunctions,
+} from 'n8n-core';
+
+import {
+	IDataObject,
+	ILoadOptionsFunctions,
+	INodePropertyOptions,
+	INodeType,
+	INodeTypeDescription,
+	IWebhookResponseData,
+} from 'n8n-workflow';
+
+import {
+	wufooApiRequest,
+} from './GenericFunctions';
+
+import {
+	IField,
+	IFormQuery,
+	IWebhook,
+} from './Interface';
+
+import {
+	randomBytes,
+} from 'crypto';
+
+export class WufooTrigger implements INodeType {
+	description: INodeTypeDescription = {
+		displayName: 'Wufoo Trigger',
+		name: 'wufooTrigger',
+		icon: 'file:wufoo.png',
+		group: ['trigger'],
+		version: 1,
+		description: 'Handle Wufoo events via webhooks',
+		defaults: {
+			name: 'Wufoo Trigger',
+			color: '#c35948',
+		},
+		inputs: [],
+		outputs: ['main'],
+		credentials: [
+			{
+				name: 'wufooApi',
+				required: true,
+			},
+		],
+		webhooks: [
+			{
+				name: 'default',
+				httpMethod: 'POST',
+				responseMode: 'onReceived',
+				path: 'webhook',
+			},
+		],
+		properties: [
+			{
+				displayName: 'Forms',
+				name: 'form',
+				type: 'options',
+				required: true,
+				default: '',
+				typeOptions: {
+					loadOptionsMethod: 'getForms',
+				},
+				description: 'The form upon which will trigger this node when a new entry is made.',
+			},
+			{
+				displayName: 'Only Answers',
+				name: 'onlyAnswers',
+				type: 'boolean',
+				default: true,
+				description: 'Returns only the answers of the form and not any of the other data.',
+			},
+		],
+	};
+
+	methods = {
+		loadOptions: {
+			async getForms(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
+				const returnData: INodePropertyOptions[] = [];
+				const body: IFormQuery = { includeTodayCount: true };
+				// https://wufoo.github.io/docs/#all-forms
+				const formObject = await wufooApiRequest.call(this, 'GET', 'forms.json', body);
+				for (const form of formObject.Forms) {
+					const name = form.Name;
+					const value = form.Hash;
+					returnData.push({
+						name,
+						value,
+					});
+				}
+				// Entries submitted on the same day are present in separate property in data object
+				if (formObject.EntryCountToday) {
+					for (const form of formObject.EntryCountToday) {
+						const name = form.Name;
+						const value = form.Hash;
+						returnData.push({
+							name,
+							value,
+						});
+					}
+				}
+				return returnData;
+			},
+		},
+	};
+
+	// @ts-ignore
+	webhookMethods = {
+		default: {
+			// No API endpoint to allow checking of existing webhooks.
+			// Creating new webhook will not overwrite existing one if parameters are the same.
+			// Otherwise an update occurs.
+			async checkExists(this: IHookFunctions): Promise<boolean> {
+				return false;
+			},
+			async create(this: IHookFunctions): Promise<boolean> {
+				const webhookUrl = this.getNodeWebhookUrl('default');
+				const webhookData = this.getWorkflowStaticData('node');
+				const formHash = this.getNodeParameter('form') as IDataObject;
+				const endpoint = `forms/${formHash}/webhooks.json`;
+
+				// Handshake key for webhook endpoint protection
+				webhookData.handshakeKey = randomBytes(20).toString('hex') as string;
+				const body: IWebhook = {
+					url: webhookUrl as string,
+					handshakeKey: webhookData.handshakeKey as string,
+					metadata: true,
+				};
+
+				const result = await wufooApiRequest.call(this, 'PUT', endpoint, body);
+				webhookData.webhookId = result.WebHookPutResult.Hash;
+
+				return true;
+			},
+			async delete(this: IHookFunctions): Promise<boolean> {
+				const webhookData = this.getWorkflowStaticData('node');
+				const formHash = this.getNodeParameter('form') as IDataObject;
+				const endpoint = `forms/${formHash}/webhooks/${webhookData.webhookId}.json`;
+				try {
+					await wufooApiRequest.call(this, 'DELETE', endpoint);
+				} catch (error) {
+					return false;
+				}
+				delete webhookData.webhookId;
+				delete webhookData.handshakeKey;
+				return true;
+			},
+		},
+	};
+
+	async webhook(this: IWebhookFunctions): Promise<IWebhookResponseData> {
+		const req = this.getRequestObject();
+		const body = this.getBodyData();
+		const webhookData = this.getWorkflowStaticData('node');
+		const onlyAnswers = this.getNodeParameter('onlyAnswers') as boolean;
+		const entries: IDataObject = {};
+		let returnObject: IDataObject = {};
+
+		if (req.body.HandshakeKey !== webhookData.handshakeKey) {
+			return {};
+		}
+
+		const fieldsObject = JSON.parse(req.body.FieldStructure);
+
+		fieldsObject.Fields.map((field: IField) => {
+
+			// TODO
+			// Handle docusign field
+
+			if (field.Type === 'file') {
+
+				entries[field.Title] = req.body[`${field.ID}-url`];
+
+			} else if (field.Type === 'address') {
+				const address: IDataObject = {};
+
+				for (const subfield of field.SubFields) {
+					address[subfield.Label] = body[subfield.ID];
+				}
+
+				entries[field.Title] = address;
+
+			} else if (field.Type === 'checkbox') {
+
+				const responses: string[] = [];
+
+				for (const subfield of field.SubFields) {
+					if (body[subfield.ID] !== '') {
+						responses.push(body[subfield.ID] as string);
+					}
+				}
+
+				entries[field.Title] = responses;
+
+			} else if (field.Type === 'likert') {
+
+				const likert: IDataObject = {};
+
+				for (const subfield of field.SubFields) {
+					likert[subfield.Label] = body[subfield.ID];
+				}
+
+				entries[field.Title] = likert;
+
+			} else if (field.Type === 'shortname') {
+
+				const shortname: IDataObject = {};
+
+				for (const subfield of field.SubFields) {
+					shortname[subfield.Label] = body[subfield.ID];
+				}
+
+				entries[field.Title] = shortname;
+
+			} else {
+				entries[field.Title] = req.body[field.ID];
+			}
+		});
+
+		if (onlyAnswers === false) {
+			returnObject = {
+				createdBy: req.body.CreatedBy as string,
+				entryId: req.body.EntryId as number,
+				dateCreated: req.body.DateCreated as Date,
+				formId: req.body.FormId as string,
+				formStructure: JSON.parse(req.body.FormStructure),
+				fieldStructure: JSON.parse(req.body.FieldStructure),
+				entries
+			};
+
+			return {
+				workflowData: [
+					this.helpers.returnJsonArray([returnObject as unknown as IDataObject]),
+				],
+			};
+
+		} else {
+			return {
+				workflowData: [
+					this.helpers.returnJsonArray(entries as unknown as IDataObject),
+				],
+			};
+		}
+	}
+}