refactor(core): Remove event bus helpers (no-changelog) (#9690)

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

@@ -8,9 +8,10 @@ import { Service } from 'typedi';
 import EventEmitter from 'events';
 
 import { CacheService } from '@/services/cache/cache.service';
-import { METRICS_EVENT_NAME, getLabelsForEvent, type EventMessageTypes } from '@/eventbus';
+import { type EventMessageTypes } from '@/eventbus';
 import { MessageEventBus } from '@/eventbus/MessageEventBus/MessageEventBus';
 import { Logger } from '@/Logger';
+import { EventMessageTypeNames } from 'n8n-workflow';
 
 @Service()
 export class MetricsService extends EventEmitter {
@@ -135,7 +136,7 @@ export class MetricsService extends EventEmitter {
 			const counter = new promClient.Counter({
 				name: metricName,
 				help: `Total number of ${event.eventName} events.`,
-				labelNames: Object.keys(getLabelsForEvent(event)),
+				labelNames: Object.keys(this.getLabelsForEvent(event)),
 			});
 			counter.inc(0);
 			this.counters[event.eventName] = counter;
@@ -148,10 +149,52 @@ export class MetricsService extends EventEmitter {
 		if (!config.getEnv('endpoints.metrics.includeMessageEventBusMetrics')) {
 			return;
 		}
-		this.eventBus.on(METRICS_EVENT_NAME, (event: EventMessageTypes) => {
+		this.eventBus.on('metrics.messageEventBus.Event', (event: EventMessageTypes) => {
 			const counter = this.getCounterForEvent(event);
 			if (!counter) return;
 			counter.inc(1);
 		});
 	}
+
+	getLabelsForEvent(event: EventMessageTypes): Record<string, string> {
+		switch (event.__type) {
+			case EventMessageTypeNames.audit:
+				if (event.eventName.startsWith('n8n.audit.user.credentials')) {
+					return config.getEnv('endpoints.metrics.includeCredentialTypeLabel')
+						? {
+								credential_type: this.getLabelValueForCredential(
+									event.payload.credentialType ?? 'unknown',
+								),
+							}
+						: {};
+				}
+
+				if (event.eventName.startsWith('n8n.audit.workflow')) {
+					return config.getEnv('endpoints.metrics.includeWorkflowIdLabel')
+						? { workflow_id: event.payload.workflowId?.toString() ?? 'unknown' }
+						: {};
+				}
+				break;
+
+			case EventMessageTypeNames.node:
+				return config.getEnv('endpoints.metrics.includeNodeTypeLabel')
+					? { node_type: this.getLabelValueForNode(event.payload.nodeType ?? 'unknown') }
+					: {};
+
+			case EventMessageTypeNames.workflow:
+				return config.getEnv('endpoints.metrics.includeWorkflowIdLabel')
+					? { workflow_id: event.payload.workflowId?.toString() ?? 'unknown' }
+					: {};
+		}
+
+		return {};
+	}
+
+	getLabelValueForNode(nodeType: string) {
+		return nodeType.replace('n8n-nodes-', '').replace(/\./g, '_');
+	}
+
+	getLabelValueForCredential(credentialType: string) {
+		return credentialType.replace(/\./g, '_');
+	}
 }