feat: Add env variables to support exposing /workflows/demo route and /nodes.json route (#8506)

Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>

packages/cli/src/services/frontend.service.ts

@@ -83,6 +83,7 @@ export class FrontendService {
 		}
 
 		this.settings = {
+			previewMode: process.env.N8N_PREVIEW_MODE === 'true',
 			endpointForm: config.getEnv('endpoints.form'),
 			endpointFormTest: config.getEnv('endpoints.formTest'),
 			endpointFormWaiting: config.getEnv('endpoints.formWaiting'),

packages/editor-ui/src/rbac/checks/__tests__/isAuthenticated.test.ts

@@ -7,8 +7,9 @@ vi.mock('@/stores/users.store', () => ({
 
 describe('Checks', () => {
 	describe('isAuthenticated()', () => {
-		it('should return true if there is a current user', () => {
 		const mockUser = { id: 'user123', name: 'Test User' };
+
+		it('should return true if there is a current user', () => {
 			vi.mocked(useUsersStore).mockReturnValue({ currentUser: mockUser } as unknown as ReturnType<
 				typeof useUsersStore
 			>);
@@ -23,5 +24,29 @@ describe('Checks', () => {
 
 			expect(isAuthenticated()).toBe(false);
 		});
+
+		it('should return true if there is a current user and bypass returns false', () => {
+			vi.mocked(useUsersStore).mockReturnValue({ currentUser: mockUser } as ReturnType<
+				typeof useUsersStore
+			>);
+
+			expect(isAuthenticated({ bypass: () => false })).toBe(true);
+		});
+
+		it('should return true if there is no current user and bypass returns true', () => {
+			vi.mocked(useUsersStore).mockReturnValue({ currentUser: null } as ReturnType<
+				typeof useUsersStore
+			>);
+
+			expect(isAuthenticated({ bypass: () => true })).toBe(true);
+		});
+
+		it('should return false if there is no current user and bypass returns false', () => {
+			vi.mocked(useUsersStore).mockReturnValue({ currentUser: null } as ReturnType<
+				typeof useUsersStore
+			>);
+
+			expect(isAuthenticated({ bypass: () => false })).toBe(false);
+		});
 	});
 });

packages/editor-ui/src/rbac/checks/isAuthenticated.ts

@@ -1,7 +1,11 @@
 import { useUsersStore } from '@/stores/users.store';
 import type { RBACPermissionCheck, AuthenticatedPermissionOptions } from '@/types/rbac';
 
-export const isAuthenticated: RBACPermissionCheck<AuthenticatedPermissionOptions> = () => {
+export const isAuthenticated: RBACPermissionCheck<AuthenticatedPermissionOptions> = (options) => {
+	if (options?.bypass?.()) {
+		return true;
+	}
+
 	const usersStore = useUsersStore();
 	return !!usersStore.currentUser;
 };

packages/editor-ui/src/rbac/middleware/authenticated.ts

@@ -7,8 +7,9 @@ export const authenticatedMiddleware: RouterMiddleware<AuthenticatedPermissionOp
 	to,
 	from,
 	next,
+	options,
 ) => {
-	const valid = isAuthenticated();
+	const valid = isAuthenticated(options);
 	if (!valid) {
 		const redirect =
 			to.query.redirect ??

packages/editor-ui/src/router.ts

@@ -359,6 +359,14 @@ export const routes = [
 		},
 		meta: {
 			middleware: ['authenticated'],
+			middlewareOptions: {
+				authenticated: {
+					bypass: () => {
+						const settingsStore = useSettingsStore();
+						return settingsStore.isPreviewMode;
+					},
+				},
+			},
 		},
 	},
 	{

packages/editor-ui/src/stores/settings.store.ts

@@ -85,6 +85,9 @@ export const useSettingsStore = defineStore(STORES.SETTINGS, {
 		isSwaggerUIEnabled(): boolean {
 			return this.api.swaggerUi.enabled;
 		},
+		isPreviewMode(): boolean {
+			return this.settings.previewMode;
+		},
 		publicApiLatestVersion(): number {
 			return this.api.latestVersion;
 		},

packages/editor-ui/src/types/rbac.ts

@@ -2,7 +2,9 @@ import type { EnterpriseEditionFeature } from '@/constants';
 import type { Resource, ScopeOptions, Scope } from '@n8n/permissions';
 import type { IRole } from '@/Interface';
 
-export type AuthenticatedPermissionOptions = {};
+export type AuthenticatedPermissionOptions = {
+	bypass?: () => boolean;
+};
 export type CustomPermissionOptions<C = {}> = RBACPermissionCheck<C>;
 export type DefaultUserMiddlewareOptions = {};
 export type InstanceOwnerMiddlewareOptions = {};

packages/editor-ui/src/views/NodeView.vue

@@ -805,7 +805,10 @@ export default defineComponent({
 		this.clipboard.onPaste.value = this.onClipboardPasteEvent;
 
 		this.canvasStore.startLoading();
-		const loadPromises = [
+		const loadPromises =
+			this.settingsStore.isPreviewMode && this.isDemo
+				? []
+				: [
 						this.loadActiveWorkflows(),
 						this.loadCredentials(),
 						this.loadCredentialTypes(),

packages/workflow/src/Interfaces.ts

@@ -2505,6 +2505,7 @@ export interface IN8nUISettings {
 	workflowTagsDisabled: boolean;
 	logLevel: LogLevel;
 	hiringBannerEnabled: boolean;
+	previewMode: boolean;
 	templates: {
 		enabled: boolean;
 		host: string;