feat(Wordpress Node): Add support for OAuth2

packages/nodes-base/credentials/WordpressOAuth2Api.credentials.ts

@@ -0,0 +1,112 @@
+import type { ICredentialType, INodeProperties } from 'n8n-workflow';
+
+export class WordpressOAuth2Api implements ICredentialType {
+	name = 'wordpressOAuth2Api';
+
+	displayName = 'WordPress OAuth2 API';
+
+	extends = ['oAuth2Api'];
+
+	documentationUrl = 'wordpress';
+
+	properties: INodeProperties[] = [
+		{
+			displayName:
+				'OAuth2 authentication works with WordPress.com-hosted sites only. For self-hosted WordPress, use the WordPress API (Basic Auth) credential instead.',
+			name: 'wordpressComNotice',
+			type: 'notice',
+			default: '',
+		},
+		{
+			displayName: 'Grant Type',
+			name: 'grantType',
+			type: 'hidden',
+			default: 'authorizationCode',
+		},
+		{
+			displayName: 'Authorization URL',
+			name: 'authUrl',
+			type: 'hidden',
+			default: 'https://public-api.wordpress.com/oauth2/authorize',
+			required: true,
+		},
+		{
+			displayName: 'Access Token URL',
+			name: 'accessTokenUrl',
+			type: 'hidden',
+			default: 'https://public-api.wordpress.com/oauth2/token',
+			required: true,
+		},
+		{
+			displayName: 'Auth URI Query Parameters',
+			name: 'authQueryParameters',
+			type: 'hidden',
+			default: '',
+		},
+		{
+			displayName: 'Authentication',
+			name: 'authentication',
+			type: 'hidden',
+			default: 'header',
+		},
+		{
+			displayName: 'Use Custom Domain',
+			name: 'customDomain',
+			type: 'boolean',
+			default: false,
+			description:
+				'Whether your WordPress.com site uses a custom domain instead of a .wordpress.com subdomain',
+		},
+		{
+			displayName: 'Custom Domain',
+			name: 'customDomainUrl',
+			type: 'string',
+			displayOptions: {
+				show: {
+					customDomain: [true],
+				},
+			},
+			default: '',
+			placeholder: 'myblog.com',
+			description:
+				"Your WordPress.com site's custom domain. Used as the site identifier in API requests — calls still route through public-api.wordpress.com.",
+		},
+		{
+			displayName: 'Custom Scopes',
+			name: 'customScopes',
+			type: 'boolean',
+			default: false,
+			description: 'Whether to define custom OAuth2 scopes instead of the defaults',
+		},
+		{
+			displayName:
+				'The default scopes needed for the node to work are already set. If you change these the node may not function correctly.',
+			name: 'customScopesNotice',
+			type: 'notice',
+			default: '',
+			displayOptions: {
+				show: {
+					customScopes: [true],
+				},
+			},
+		},
+		{
+			displayName: 'Enabled Scopes',
+			name: 'enabledScopes',
+			type: 'string',
+			displayOptions: {
+				show: {
+					customScopes: [true],
+				},
+			},
+			default: 'global',
+			description: 'Space-separated list of OAuth2 scopes to request',
+		},
+		{
+			displayName: 'Scope',
+			name: 'scope',
+			type: 'hidden',
+			default: '={{$self["customScopes"] ? $self["enabledScopes"] : "global"}}',
+		},
+	];
+}

packages/nodes-base/credentials/test/WordpressOAuth2Api.credentials.test.ts

@@ -0,0 +1,159 @@
+import { ClientOAuth2 } from '@n8n/client-oauth2';
+import nock from 'nock';
+
+import { WordpressOAuth2Api } from '../WordpressOAuth2Api.credentials';
+
+describe('WordpressOAuth2Api Credential', () => {
+	const credential = new WordpressOAuth2Api();
+
+	// Shared OAuth2 configuration
+	const authorizationUri = 'https://public-api.wordpress.com/oauth2/authorize';
+	const accessTokenUri = 'https://public-api.wordpress.com/oauth2/token';
+	const redirectUri = 'http://localhost:5678/rest/oauth2-credential/callback';
+	const clientId = 'test-client-id';
+	const clientSecret = 'test-client-secret';
+
+	const createOAuthClient = (scopes: string[]) =>
+		new ClientOAuth2({
+			clientId,
+			clientSecret,
+			accessTokenUri,
+			authorizationUri,
+			redirectUri,
+			scopes,
+		});
+
+	const mockTokenEndpoint = (code: string, responseScopes: string[]) => {
+		nock('https://public-api.wordpress.com')
+			.post('/oauth2/token', (body: Record<string, unknown>) => {
+				return (
+					body.code === code &&
+					body.grant_type === 'authorization_code' &&
+					body.redirect_uri === redirectUri
+				);
+			})
+			.reply(200, {
+				access_token: 'test-access-token',
+				token_type: 'Bearer',
+				expires_in: 64800,
+				scope: responseScopes.join(' '),
+				blog_id: '12345',
+				blog_url: 'https://myblog.wordpress.com',
+			});
+	};
+
+	beforeAll(() => {
+		nock.disableNetConnect();
+	});
+
+	afterAll(() => {
+		nock.restore();
+	});
+
+	afterEach(() => {
+		nock.cleanAll();
+	});
+
+	it('should have correct credential metadata', () => {
+		expect(credential.name).toBe('wordpressOAuth2Api');
+		expect(credential.extends).toEqual(['oAuth2Api']);
+
+		const authUrlProperty = credential.properties.find((p) => p.name === 'authUrl');
+		expect(authUrlProperty?.default).toBe('https://public-api.wordpress.com/oauth2/authorize');
+
+		const accessTokenUrlProperty = credential.properties.find((p) => p.name === 'accessTokenUrl');
+		expect(accessTokenUrlProperty?.default).toBe('https://public-api.wordpress.com/oauth2/token');
+	});
+
+	it('should have a notice about WordPress.com-only support', () => {
+		const noticeProperty = credential.properties.find((p) => p.name === 'wordpressComNotice');
+		expect(noticeProperty).toBeDefined();
+		expect(noticeProperty?.type).toBe('notice');
+		expect(noticeProperty?.default).toBe('');
+	});
+
+	it('should have custom domain toggle defaulting to false', () => {
+		const customDomainProperty = credential.properties.find((p) => p.name === 'customDomain');
+		expect(customDomainProperty?.default).toBe(false);
+	});
+
+	it('should have custom scopes toggle defaulting to false', () => {
+		const customScopesProperty = credential.properties.find((p) => p.name === 'customScopes');
+		expect(customScopesProperty?.default).toBe(false);
+	});
+
+	it('should have default scope of global', () => {
+		const enabledScopesProperty = credential.properties.find((p) => p.name === 'enabledScopes');
+		expect(enabledScopesProperty?.default).toBe('global');
+	});
+
+	describe('OAuth2 flow with default scope', () => {
+		it('should include global scope in authorization URI', () => {
+			const oauthClient = createOAuthClient(['global']);
+			const authUri = oauthClient.code.getUri();
+
+			expect(authUri).toContain('scope=');
+			expect(authUri).toContain('global');
+			expect(authUri).toContain(`client_id=${clientId}`);
+			expect(authUri).toContain('response_type=code');
+		});
+
+		it('should retrieve token successfully with global scope', async () => {
+			const code = 'test-auth-code';
+			mockTokenEndpoint(code, ['global']);
+
+			const oauthClient = createOAuthClient(['global']);
+			const token = await oauthClient.code.getToken(redirectUri + `?code=${code}`);
+
+			expect(token.data.scope).toContain('global');
+			expect(token.data.blog_id).toBe('12345');
+			expect(token.data.blog_url).toBe('https://myblog.wordpress.com');
+		});
+	});
+
+	describe('OAuth2 flow with custom scopes', () => {
+		const customScopes = ['posts', 'media'];
+
+		it('should include custom scopes in authorization URI', () => {
+			const oauthClient = createOAuthClient(customScopes);
+			const authUri = oauthClient.code.getUri();
+
+			expect(authUri).toContain('scope=');
+			expect(authUri).toContain('posts');
+			expect(authUri).toContain('media');
+			expect(authUri).not.toContain('global');
+		});
+
+		it('should retrieve token successfully with custom scopes', async () => {
+			const code = 'test-auth-code';
+			mockTokenEndpoint(code, customScopes);
+
+			const oauthClient = createOAuthClient(customScopes);
+			const token = await oauthClient.code.getToken(redirectUri + `?code=${code}`);
+
+			expect(token.data.scope).toContain('posts');
+			expect(token.data.scope).toContain('media');
+		});
+
+		it('should handle completely different custom scopes', async () => {
+			const differentScopes = ['comments', 'stats'];
+			const code = 'test-auth-code';
+			mockTokenEndpoint(code, differentScopes);
+
+			const oauthClient = createOAuthClient(differentScopes);
+			const authUri = oauthClient.code.getUri();
+
+			expect(authUri).toContain('comments');
+			expect(authUri).toContain('stats');
+			expect(authUri).not.toContain('global');
+			expect(authUri).not.toContain('posts');
+
+			const token = await oauthClient.code.getToken(redirectUri + `?code=${code}`);
+
+			expect(token.data.scope).toContain('comments');
+			expect(token.data.scope).toContain('stats');
+			expect(token.data.scope).not.toContain('global');
+			expect(token.data.scope).not.toContain('posts');
+		});
+	});
+});

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

@@ -18,7 +18,27 @@ export async function wordpressApiRequest(
 	uri?: string,
 	option: IDataObject = {},
 ): Promise<any> {
-	const credentials = await this.getCredentials('wordpressApi');
+	const authType = this.getNodeParameter('authType', 0, 'basicAuth') as string;
+	const isOAuth2 = authType === 'oAuth2';
+
+	let baseUri: string;
+	let credentialType: string;
+	let rejectUnauthorized: boolean | undefined;
+
+	if (isOAuth2) {
+		const credentials = await this.getCredentials('wordpressOAuth2Api');
+		credentialType = 'wordpressOAuth2Api';
+		const sitePrefix =
+			credentials.customDomain && credentials.customDomainUrl
+				? `/sites/${credentials.customDomainUrl as string}`
+				: '';
+		baseUri = `https://public-api.wordpress.com/wp/v2${sitePrefix}`;
+	} else {
+		const credentials = await this.getCredentials('wordpressApi');
+		credentialType = 'wordpressApi';
+		baseUri = `${credentials.url as string}/wp-json/wp/v2`;
+		rejectUnauthorized = !(credentials.allowUnauthorizedCerts as boolean);
+	}
 
 	let options: IRequestOptions = {
 		headers: {
@@ -29,16 +49,15 @@ export async function wordpressApiRequest(
 		method,
 		qs,
 		body,
-		uri: uri || `${credentials.url}/wp-json/wp/v2${resource}`,
-		rejectUnauthorized: !credentials.allowUnauthorizedCerts,
+		uri: uri ?? `${baseUri}${resource}`,
+		...(rejectUnauthorized !== undefined ? { rejectUnauthorized } : {}),
 		json: true,
 	};
 	options = Object.assign({}, options, option);
 	if (Object.keys(options.body as IDataObject).length === 0) {
 		delete options.body;
 	}
 	try {
-		const credentialType = 'wordpressApi';
 		return await this.helpers.requestWithAuthentication.call(this, credentialType, options);
 	} catch (error) {
 		throw new NodeApiError(this.getNode(), error as JsonObject);

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

@@ -36,9 +36,40 @@ export class Wordpress implements INodeType {
 			{
 				name: 'wordpressApi',
 				required: true,
+				displayOptions: {
+					show: {
+						authType: ['basicAuth'],
+					},
+				},
+			},
+			{
+				name: 'wordpressOAuth2Api',
+				required: true,
+				displayOptions: {
+					show: {
+						authType: ['oAuth2'],
+					},
+				},
 			},
 		],
 		properties: [
+			{
+				displayName: 'Authentication',
+				name: 'authType',
+				type: 'options',
+				options: [
+					{
+						name: 'Basic Auth',
+						value: 'basicAuth',
+					},
+					{
+						name: 'OAuth2 (WordPress.com)',
+						value: 'oAuth2',
+					},
+				],
+				default: 'basicAuth',
+				description: 'The authentication method to use',
+			},
 			{
 				displayName: 'Resource',
 				name: 'resource',