Credentials, oauth2 supported genericfunctions, oauth2 UI mod

packages/nodes-base/nodes/Webflow/GenericFunctions.ts

@@ -9,14 +9,10 @@ import {
 import { IDataObject } from 'n8n-workflow';
 
 export async function webflowApiRequest(this: IHookFunctions | IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions | IWebhookFunctions, method: string, resource: string, body: any = {}, qs: IDataObject = {}, uri?: string, option: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any
-	const credentials = this.getCredentials('webflowApi');
-	if (credentials === undefined) {
-		throw new Error('No credentials got returned!');
-	}
+	const authenticationMethod = this.getNodeParameter('authentication', 0);
 
 	let options: OptionsWithUri = {
 		headers: {
-			authorization: `Bearer ${credentials.accessToken}`,
 			'accept-version': '1.0.0',
 		},
 		method,
@@ -31,14 +27,19 @@ export async function webflowApiRequest(this: IHookFunctions | IExecuteFunctions
 	}
 
 	try {
-		return await this.helpers.request!(options);
-	} catch (error) {
+		if (authenticationMethod === 'accessToken') {
+			const credentials = this.getCredentials('webflowApi');
+			if (credentials === undefined) {
+				throw new Error('No credentials got returned!');
+			}
 
-		let errorMessage = error.message;
-		if (error.response.body && error.response.body.err) {
-			errorMessage = error.response.body.err;
+			options.headers!['authorization'] = `Bearer ${credentials.accessToken}`;
+
+			return await this.helpers.request!(options);
+		} else {
+			return await this.helpers.requestOAuth2!.call(this, 'webflowOAuth2Api', options);
 		}
-
-		throw new Error('Webflow Error: ' + errorMessage);
+	} catch (error) {
+		throw new Error('Webflow Error: ' + error.code + error.msg);
 	}
 }

packages/nodes-base/nodes/Webflow/WebflowTrigger.node.ts

@@ -34,7 +34,25 @@ export class WebflowTrigger implements INodeType {
 			{
 				name: 'webflowApi',
 				required: true,
-			}
+				displayOptions: {
+					show: {
+						authentication: [
+							'accessToken',
+						],
+					},
+				},
+			},
+			{
+				name: 'webflowOAuth2Api',
+				required: true,
+				displayOptions: {
+					show: {
+						authentication: [
+							'oAuth2',
+						],
+					},
+				},
+			},
 		],
 		webhooks: [
 			{
@@ -45,6 +63,23 @@ export class WebflowTrigger implements INodeType {
 			},
 		],
 		properties: [
+			{
+				displayName: 'Authentication',
+				name: 'authentication',
+				type: 'options',
+				options: [
+					{
+						name: 'Access Token',
+						value: 'accessToken',
+					},
+					{
+						name: 'OAuth2',
+						value: 'oAuth2',
+					},
+				],
+				default: 'accessToken',
+				description: 'Method of authentication.',
+			},
 			{
 				displayName: 'Site',
 				name: 'site',