feat(core): Convert eventBus controller to decorator style and improv…

…e permissions (n8n-io#5779)

packages/cli/src/Server.ts

@@ -129,7 +129,7 @@ import { WaitTracker } from '@/WaitTracker';
 import * as WebhookHelpers from '@/WebhookHelpers';
 import * as WorkflowExecuteAdditionalData from '@/WorkflowExecuteAdditionalData';
 import { toHttpNodeParameters } from '@/CurlConverterHelper';
-import { eventBusRouter } from '@/eventbus/eventBusRoutes';
+import { EventBusController } from '@/eventbus/eventBus.controller';
 import { isLogStreamingEnabled } from '@/eventbus/MessageEventBus/MessageEventBusHelper';
 import { licenseController } from './license/license.controller';
 import { Push, setupPushServer, setupPushHandler } from '@/push';
@@ -377,6 +377,7 @@ class Server extends AbstractServer {
 		const samlService = Container.get(SamlService);
 
 		const controllers: object[] = [
+			new EventBusController(),
 			new AuthController({ config, internalHooks, repositories, logger, postHog }),
 			new OwnerController({ config, internalHooks, repositories, logger }),
 			new MeController({ externalHooks, internalHooks, repositories, logger }),
@@ -1229,8 +1230,6 @@ class Server extends AbstractServer {
 		if (!eventBus.isInitialized) {
 			await eventBus.initialize();
 		}
-		// add Event Bus REST endpoints
-		this.app.use(`/${this.restEndpoint}/eventbus`, eventBusRouter);
 
 		// ----------------------------------------
 		// Webhooks

packages/cli/src/eventbus/EventMessageClasses/index.ts

@@ -49,3 +49,11 @@ export type EventMessageTypes =
 	| EventMessageWorkflow
 	| EventMessageAudit
 	| EventMessageNode;
+
+export interface FailedEventSummary {
+	lastNodeExecuted: string;
+	executionId: string;
+	name: string;
+	event: string;
+	timestamp: string;
+}

packages/cli/src/eventbus/MessageEventBus/MessageEventBus.ts

@@ -1,7 +1,11 @@
 import { LoggerProxy } from 'n8n-workflow';
 import type { MessageEventBusDestinationOptions } from 'n8n-workflow';
 import type { DeleteResult } from 'typeorm';
-import type { EventMessageTypes } from '../EventMessageClasses/';
+import type {
+	EventMessageTypes,
+	EventNamesTypes,
+	FailedEventSummary,
+} from '../EventMessageClasses/';
 import type { MessageEventBusDestination } from '../MessageEventBusDestination/MessageEventBusDestination.ee';
 import { MessageEventBusLogWriter } from '../MessageEventBusWriter/MessageEventBusLogWriter';
 import EventEmitter from 'events';
@@ -249,6 +253,48 @@ export class MessageEventBus extends EventEmitter {
 		);
 	}
 
+	async getEventsFailed(amount = 5): Promise<FailedEventSummary[]> {
+		const result: FailedEventSummary[] = [];
+		try {
+			const queryResult = await this.logWriter?.getMessagesAll();
+			const uniques = uniqby(queryResult, 'id');
+			const filteredExecutionIds = uniques
+				.filter((e) =>
+					(['n8n.workflow.crashed', 'n8n.workflow.failed'] as EventNamesTypes[]).includes(
+						e.eventName,
+					),
+				)
+				.map((e) => ({
+					executionId: e.payload.executionId as string,
+					name: e.payload.workflowName,
+					timestamp: e.ts,
+					event: e.eventName,
+				}))
+				.filter((e) => e)
+				.sort((a, b) => (a.timestamp > b.timestamp ? 1 : -1))
+				.slice(-amount);
+
+			for (const execution of filteredExecutionIds) {
+				const data = await recoverExecutionDataFromEventLogMessages(
+					execution.executionId,
+					queryResult,
+					false,
+				);
+				if (data) {
+					const lastNodeExecuted = data.resultData.lastNodeExecuted;
+					result.push({
+						lastNodeExecuted: lastNodeExecuted ?? '',
+						executionId: execution.executionId,
+						name: execution.name as string,
+						event: execution.event,
+						timestamp: execution.timestamp.toISO(),
+					});
+				}
+			}
+		} catch {}
+		return result;
+	}
+
 	async getEventsAll(): Promise<EventMessageTypes[]> {
 		const queryResult = await this.logWriter?.getMessagesAll();
 		const filtered = uniqby(queryResult, 'id');

packages/cli/src/eventbus/eventBusRoutes.ts → packages/cli/src/eventbus/eventBus.controller.ts

@@ -17,22 +17,26 @@ import {
 	MessageEventBusDestinationSyslog,
 } from './MessageEventBusDestination/MessageEventBusDestinationSyslog.ee';
 import { MessageEventBusDestinationWebhook } from './MessageEventBusDestination/MessageEventBusDestinationWebhook.ee';
+import type { EventMessageTypes, FailedEventSummary } from './EventMessageClasses';
 import { eventNamesAll } from './EventMessageClasses';
 import type { EventMessageAuditOptions } from './EventMessageClasses/EventMessageAudit';
 import { EventMessageAudit } from './EventMessageClasses/EventMessageAudit';
-import { BadRequestError } from '../ResponseHelper';
+import { BadRequestError } from '@/ResponseHelper';
 import type {
 	MessageEventBusDestinationWebhookOptions,
 	MessageEventBusDestinationOptions,
+	IRunExecutionData,
 } from 'n8n-workflow';
 import { MessageEventBusDestinationTypeNames, EventMessageTypeNames } from 'n8n-workflow';
-import type { User } from '../databases/entities/User';
+import type { User } from '@db/entities/User';
 import * as ResponseHelper from '@/ResponseHelper';
 import type { EventMessageNodeOptions } from './EventMessageClasses/EventMessageNode';
 import { EventMessageNode } from './EventMessageClasses/EventMessageNode';
 import { recoverExecutionDataFromEventLogMessages } from './MessageEventBus/recoverEvents';
-
-export const eventBusRouter = express.Router();
+import { RestController, Get, Post, Delete } from '@/decorators';
+import type { MessageEventBusDestination } from './MessageEventBusDestination/MessageEventBusDestination.ee';
+import { isOwnerMiddleware } from '../middlewares/isOwner';
+import type { DeleteResult } from 'typeorm';
 
 // ----------------------------------------
 // TypeGuards
@@ -50,7 +54,6 @@ const isWithQueryString = (candidate: unknown): candidate is { query: string } =
 	return o.query !== undefined;
 };
 
-// TODO: add credentials
 const isMessageEventBusDestinationWebhookOptions = (
 	candidate: unknown,
 ): candidate is MessageEventBusDestinationWebhookOptions => {
@@ -68,11 +71,18 @@ const isMessageEventBusDestinationOptions = (
 };
 
 // ----------------------------------------
-// Events
+// Controller
 // ----------------------------------------
-eventBusRouter.get(
-	'/event',
-	ResponseHelper.send(async (req: express.Request): Promise<any> => {
+
+@RestController('/eventbus')
+export class EventBusController {
+	// ----------------------------------------
+	// Events
+	// ----------------------------------------
+	@Get('/event', { middlewares: [isOwnerMiddleware] })
+	async getEvents(
+		req: express.Request,
+	): Promise<EventMessageTypes[] | Record<string, EventMessageTypes[]>> {
 		if (isWithQueryString(req.query)) {
 			switch (req.query.query as EventMessageReturnMode) {
 				case 'sent':
@@ -85,55 +95,47 @@ eventBusRouter.get(
 				default:
 					return eventBus.getEventsAll();
 			}
+		} else {
+			return eventBus.getEventsAll();
 		}
-		return eventBus.getEventsAll();
-	}),
-);
+	}
+
+	@Get('/failed')
+	async getFailedEvents(req: express.Request): Promise<FailedEventSummary[]> {
+		const amount = parseInt(req.query?.amount as string) ?? 5;
+		return eventBus.getEventsFailed(amount);
+	}
 
-eventBusRouter.get(
-	'/execution/:id',
-	ResponseHelper.send(async (req: express.Request): Promise<any> => {
+	@Get('/execution/:id')
+	async getEventForExecutionId(req: express.Request): Promise<EventMessageTypes[] | undefined> {
 		if (req.params?.id) {
 			let logHistory;
 			if (req.query?.logHistory) {
 				logHistory = parseInt(req.query.logHistory as string, 10);
 			}
 			return eventBus.getEventsByExecutionId(req.params.id, logHistory);
 		}
-	}),
-);
+		return;
+	}
 
-eventBusRouter.get(
-	'/execution-recover/:id',
-	ResponseHelper.send(async (req: express.Request): Promise<any> => {
+	@Get('/execution-recover/:id')
+	async getRecoveryForExecutionId(req: express.Request): Promise<IRunExecutionData | undefined> {
+		const { id } = req.params;
 		if (req.params?.id) {
-			let logHistory;
-			let applyToDb = true;
-			if (req.query?.logHistory) {
-				logHistory = parseInt(req.query.logHistory as string, 10);
-			}
-			if (req.query?.applyToDb) {
-				applyToDb = !!req.query.applyToDb;
-			}
-			const messages = await eventBus.getEventsByExecutionId(req.params.id, logHistory);
+			const logHistory = parseInt(req.query.logHistory as string, 10) || undefined;
+			const applyToDb = req.query.applyToDb !== undefined ? !!req.query.applyToDb : true;
+			const messages = await eventBus.getEventsByExecutionId(id, logHistory);
 			if (messages.length > 0) {
-				// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
-				const recoverResult = await recoverExecutionDataFromEventLogMessages(
-					req.params.id,
-					messages,
-					applyToDb,
-				);
-				return recoverResult;
+				return recoverExecutionDataFromEventLogMessages(id, messages, applyToDb);
 			}
 		}
-	}),
-);
+		return;
+	}
 
-eventBusRouter.post(
-	'/event',
-	ResponseHelper.send(async (req: express.Request): Promise<any> => {
+	@Post('/event', { middlewares: [isOwnerMiddleware] })
+	async postEvent(req: express.Request): Promise<EventMessageTypes | undefined> {
+		let msg: EventMessageTypes | undefined;
 		if (isEventMessageOptions(req.body)) {
-			let msg;
 			switch (req.body.__type) {
 				case EventMessageTypeNames.workflow:
 					msg = new EventMessageWorkflow(req.body as EventMessageWorkflowOptions);
@@ -154,35 +156,30 @@ eventBusRouter.post(
 				'Body is not a serialized EventMessage or eventName does not match format {namespace}.{domain}.{event}',
 			);
 		}
-	}),
-);
+		return msg;
+	}
 
-// ----------------------------------------
-// Destinations
-// ----------------------------------------
+	// ----------------------------------------
+	// Destinations
+	// ----------------------------------------
 
-eventBusRouter.get(
-	'/destination',
-	ResponseHelper.send(async (req: express.Request): Promise<any> => {
-		let result = [];
+	@Get('/destination')
+	async getDestination(req: express.Request): Promise<MessageEventBusDestinationOptions[]> {
 		if (isWithIdString(req.query)) {
-			result = await eventBus.findDestination(req.query.id);
+			return eventBus.findDestination(req.query.id);
 		} else {
-			result = await eventBus.findDestination();
+			return eventBus.findDestination();
 		}
-		return result;
-	}),
-);
+	}
 
-eventBusRouter.post(
-	'/destination',
-	ResponseHelper.send(async (req: express.Request): Promise<any> => {
+	@Post('/destination', { middlewares: [isOwnerMiddleware] })
+	async postDestination(req: express.Request): Promise<any> {
 		if (!req.user || (req.user as User).globalRole.name !== 'owner') {
 			throw new ResponseHelper.UnauthorizedError('Invalid request');
 		}
 
+		let result: MessageEventBusDestination | undefined;
 		if (isMessageEventBusDestinationOptions(req.body)) {
-			let result;
 			switch (req.body.__type) {
 				case MessageEventBusDestinationTypeNames.sentry:
 					if (isMessageEventBusDestinationSentryOptions(req.body)) {
@@ -214,51 +211,41 @@ eventBusRouter.post(
 			if (result) {
 				await result.saveToDb();
 				return {
-					...result,
+					...result.serialize(),
 					eventBusInstance: undefined,
 				};
 			}
 			throw new BadRequestError('There was an error adding the destination');
 		}
 		throw new BadRequestError('Body is not configuring MessageEventBusDestinationOptions');
-	}),
-);
+	}
 
-eventBusRouter.get(
-	'/testmessage',
-	ResponseHelper.send(async (req: express.Request): Promise<any> => {
-		let result = false;
+	@Get('/testmessage')
+	async sendTestMessage(req: express.Request): Promise<boolean> {
 		if (isWithIdString(req.query)) {
-			result = await eventBus.testDestination(req.query.id);
+			return eventBus.testDestination(req.query.id);
 		}
-		return result;
-	}),
-);
+		return false;
+	}
 
-eventBusRouter.delete(
-	'/destination',
-	ResponseHelper.send(async (req: express.Request): Promise<any> => {
+	@Delete('/destination', { middlewares: [isOwnerMiddleware] })
+	async deleteDestination(req: express.Request): Promise<DeleteResult | undefined> {
 		if (!req.user || (req.user as User).globalRole.name !== 'owner') {
 			throw new ResponseHelper.UnauthorizedError('Invalid request');
 		}
 		if (isWithIdString(req.query)) {
-			const result = await eventBus.removeDestination(req.query.id);
-			if (result) {
-				return result;
-			}
+			return eventBus.removeDestination(req.query.id);
 		} else {
 			throw new BadRequestError('Query is missing id');
 		}
-	}),
-);
+	}
 
-// ----------------------------------------
-// Utilities
-// ----------------------------------------
+	// ----------------------------------------
+	// Utilities
+	// ----------------------------------------
 
-eventBusRouter.get(
-	'/eventnames',
-	ResponseHelper.send(async (): Promise<any> => {
+	@Get('/eventnames')
+	async getEventNames(): Promise<string[]> {
 		return eventNamesAll;
-	}),
-);
+	}
+}

packages/cli/src/middlewares/isOwner.ts

@@ -0,0 +1,12 @@
+import type { RequestHandler } from 'express';
+import { LoggerProxy } from 'n8n-workflow';
+import type { AuthenticatedRequest } from '@/requests';
+
+export const isOwnerMiddleware: RequestHandler = (req: AuthenticatedRequest, res, next) => {
+	if (req.user.globalRole.name === 'owner') {
+		next();
+	} else {
+		LoggerProxy.debug('Request failed because user is not owner');
+		res.status(401).send('Unauthorized');
+	}
+};

packages/cli/test/integration/eventbus.test.ts

@@ -100,7 +100,7 @@ beforeAll(async () => {
 
 	utils.initConfigFile();
 	config.set('eventBus.logWriter.logBaseName', 'n8n-test-logwriter');
-	config.set('eventBus.logWriter.keepLogCount', '1');
+	config.set('eventBus.logWriter.keepLogCount', 1);
 	config.set('enterprise.features.logStreaming', true);
 	config.set('userManagement.disabled', false);
 	config.set('userManagement.isInstanceOwnerSetUp', true);