NextCloud OAuth2 support

packages/nodes-base/credentials/NextCloudOAuth2Api.credentials.ts

@@ -0,0 +1,54 @@
+import {
+	ICredentialType,
+	NodePropertyTypes,
+} from 'n8n-workflow';
+
+
+export class NextCloudOAuth2Api implements ICredentialType {
+	name = 'nextCloudOAuth2Api';
+	extends = [
+		'oAuth2Api',
+	];
+	displayName = 'NextCloud OAuth2 API';
+	properties = [
+		{
+			displayName: 'Web DAV URL',
+			name: 'webDavUrl',
+			type: 'string' as NodePropertyTypes,
+			placeholder: 'https://nextcloud.example.com/remote.php/webdav/',
+			default: '',
+		},
+		{
+			displayName: 'Authorization URL',
+			name: 'authUrl',
+			type: 'string' as NodePropertyTypes,
+			default: 'https://nextcloud.example.com/apps/oauth2/authorize',
+			required: true,
+		},
+		{
+			displayName: 'Access Token URL',
+			name: 'accessTokenUrl',
+			type: 'string' as NodePropertyTypes,
+			default: 'https://nextcloud.example.com/apps/oauth2/api/v1/token',
+			required: true,
+		},
+		{
+			displayName: 'Scope',
+			name: 'scope',
+			type: 'hidden' as NodePropertyTypes,
+			default: '',
+		},
+		{
+			displayName: 'Auth URI Query Parameters',
+			name: 'authQueryParameters',
+			type: 'hidden' as NodePropertyTypes,
+			default: '',
+		},
+		{
+			displayName: 'Authentication',
+			name: 'authentication',
+			type: 'hidden' as NodePropertyTypes,
+			default: 'body',
+		},
+	];
+}

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

@@ -0,0 +1,64 @@
+import {
+	IExecuteFunctions,
+	IHookFunctions,
+} from 'n8n-core';
+
+import {
+	IDataObject,
+} from 'n8n-workflow';
+import { OptionsWithUri } from 'request';
+
+/**
+ * Make an API request to NextCloud
+ *
+ * @param {IHookFunctions} this
+ * @param {string} method
+ * @param {string} url
+ * @param {object} body
+ * @returns {Promise<any>}
+ */
+export async function nextCloudApiRequest(this: IHookFunctions | IExecuteFunctions, method: string, endpoint: string, body: object | string | Buffer, headers?: object, encoding?: null | undefined, query?: object): Promise<any> { // tslint:disable-line:no-any
+	const options : OptionsWithUri = {
+		headers,
+		method,
+		body,
+		qs: {},
+		uri: '',
+		json: false,
+	};
+
+	if (encoding === null) {
+		options.encoding = null;
+	}
+
+	const authenticationMethod = this.getNodeParameter('authentication', 0);
+
+	try {
+		if (authenticationMethod === 'accessToken') {
+			const credentials = this.getCredentials('nextCloudApi');
+			if (credentials === undefined) {
+				throw new Error('No credentials got returned!');
+			}
+
+			options.auth = {
+				user: credentials.user as string,
+				pass: credentials.password as string,
+			};
+
+			options.uri = `${credentials.webDavUrl}/${encodeURI(endpoint)}`;
+
+			return await this.helpers.request(options);
+		} else {
+			const credentials = this.getCredentials('nextCloudOAuth2Api');
+			if (credentials === undefined) {
+				throw new Error('No credentials got returned!');
+			}
+
+			options.uri = `${credentials.webDavUrl}/${encodeURI(endpoint)}`;
+
+			return await this.helpers.requestOAuth2!.call(this, 'nextCloudOAuth2Api', options);
+		}
+	} catch (error) {
+		throw new Error(`NextCloud Error. Status Code: ${error.statusCode}. Message: ${error.message}`);
+	}
+}

packages/nodes-base/nodes/NextCloud/NextCloud.node.ts

@@ -11,6 +11,7 @@ import {
 
 import { parseString } from 'xml2js';
 import { OptionsWithUri } from 'request';
+import { nextCloudApiRequest } from './GenericFunctions';
 
 
 export class NextCloud implements INodeType {
@@ -32,9 +33,44 @@ export class NextCloud implements INodeType {
 			{
 				name: 'nextCloudApi',
 				required: true,
-			}
+				displayOptions: {
+					show: {
+						authentication: [
+							'accessToken',
+						],
+					},
+				},
+			},
+			{
+				name: 'nextCloudOAuth2Api',
+				required: true,
+				displayOptions: {
+					show: {
+						authentication: [
+							'oAuth2',
+						],
+					},
+				},
+			},
 		],
 		properties: [
+			{
+				displayName: 'Authentication',
+				name: 'authentication',
+				type: 'options',
+				options: [
+					{
+						name: 'Access Token',
+						value: 'accessToken',
+					},
+					{
+						name: 'OAuth2',
+						value: 'oAuth2',
+					},
+				],
+				default: 'accessToken',
+				description: 'The resource to operate on.',
+			},
 			{
 				displayName: 'Resource',
 				name: 'resource',
@@ -446,7 +482,14 @@ export class NextCloud implements INodeType {
 		const items = this.getInputData().slice();
 		const returnData: IDataObject[] = [];
 
-		const credentials = this.getCredentials('nextCloudApi');
+		const authenticationMethod = this.getNodeParameter('authentication', 0);
+		let credentials;
+
+		if (authenticationMethod === 'accessToken') {
+			credentials = this.getCredentials('nextCloudApi');
+		} else {
+			credentials = this.getCredentials('nextCloudOAuth2Api');
+		}
 
 		if (credentials === undefined) {
 			throw new Error('No credentials got returned!');
@@ -562,26 +605,14 @@ export class NextCloud implements INodeType {
 				webDavUrl = webDavUrl.slice(0, -1);
 			}
 
-			const options: OptionsWithUri = {
-				auth: {
-					user: credentials.user as string,
-					pass: credentials.password as string,
-				},
-				headers,
-				method: requestMethod,
-				body,
-				qs: {},
-				uri: `${credentials.webDavUrl}/${encodeURI(endpoint)}`,
-				json: false,
-			};
-
+			let encoding = undefined;
 			if (resource === 'file' && operation === 'download') {
 				// Return the data as a buffer
-				options.encoding = null;
+				encoding = null;
 			}
 
 			try {
-				responseData = await this.helpers.request(options);
+				responseData = await nextCloudApiRequest.call(this, requestMethod, endpoint, body, headers, encoding);
 			} catch (error) {
 				if (this.continueOnFail() === true) {
 					returnData.push({ error });

packages/nodes-base/package.json

@@ -98,6 +98,7 @@
       "dist/credentials/Msg91Api.credentials.js",
       "dist/credentials/MySql.credentials.js",
       "dist/credentials/NextCloudApi.credentials.js",
+      "dist/credentials/NextCloudOAuth2Api.credentials.js",
       "dist/credentials/OAuth1Api.credentials.js",
       "dist/credentials/OAuth2Api.credentials.js",
       "dist/credentials/OpenWeatherMapApi.credentials.js",