feat: Support feature flag evaluation server side (#5511)

* feat(editor): roll out schema view

* feat(editor): add posthog tracking

* refactor: use composables

* refactor: clean up console log

* refactor: clean up impl

* chore: clean up impl

* fix: fix demo var

* chore: add comment

* refactor: clean up

* chore: wrap error func

* refactor: clean up import

* refactor: make store

* feat: enable rudderstack usebeacon, move event to unload

* chore: clean up alert

* refactor: move tracking from hooks

* fix: reload flags on login

* fix: add func to setup

* fix: clear duplicate import

* chore: add console to tesT

* chore: add console to tesT

* fix: try reload

* chore: randomize instnace id for testing

* chore: randomize instnace id for testing

* chore: add console logs for testing

* chore: move random id to fe

* chore: use query param for testing

* feat: update PostHog api endpoint

* feat: update rs host

* feat: update rs host

* feat: update rs endpoints

* refactor: use api host for BE events as well

* refactor: refactor out posthog client

* feat: add feature flags to login

* feat: add feature flags to login

* feat: get feature flags to work

* feat: add created at to be events

* chore: add todos

* chore: clean up store

* chore: add created at to identify

* feat: add posthog config to settings

* feat: add bootstrapping

* chore: clean up

* chore: fix build

* fix: get dates to work

* fix: get posthog to recognize dates

* chore: refactor

* fix: update back to number

* fix: update key

* fix: get experiment evals to work

* feat: add posthog to signup router

* feat: add feature flags on sign up

* chore: clean up

* fix: fix import

* chore: clean up loading script

* feat: add timeout, fix: script loader

* fix: test timeout and get working on 8080

* refactor: move out posthog

* feat: add experiment tracking

* fix: clear tracked on reset

* fix: fix signup bug

* fix: handle errors when telmetry is disabled

* refactor: remove redundant await

* fix: add back posthog to telemetry

* test: fix test

* test: fix test

* test: add tests for posthog client

* lint: fix

* fix: fix issue with slow decide endpoint

* lint: fix

* lint: fix

* lint: fix

* lint: fix

* chore: address PR feedback

* chore: address PR feedback

* feat: add onboarding experiment

packages/cli/src/telemetry/index.ts

@@ -1,7 +1,7 @@
 /* eslint-disable @typescript-eslint/no-unsafe-call */
 /* eslint-disable @typescript-eslint/no-unsafe-member-access */
 import type RudderStack from '@rudderstack/rudder-sdk-node';
-import type { PostHog } from 'posthog-node';
+import type { PostHogClient } from '../posthog';
 import type { ITelemetryTrackProperties } from 'n8n-workflow';
 import { LoggerProxy } from 'n8n-workflow';
 import config from '@/config';
@@ -31,13 +31,11 @@ interface IExecutionsBuffer {
 export class Telemetry {
 	private rudderStack?: RudderStack;
 
-	private postHog?: PostHog;
-
 	private pulseIntervalReference: NodeJS.Timeout;
 
 	private executionCountsBuffer: IExecutionsBuffer = {};
 
-	constructor(private instanceId: string) {}
+	constructor(private instanceId: string, private postHog: PostHogClient) {}
 
 	async init() {
 		const enabled = config.getEnv('diagnostics.enabled');
@@ -58,12 +56,6 @@ export class Telemetry {
 			const { default: RudderStack } = await import('@rudderstack/rudder-sdk-node');
 			this.rudderStack = new RudderStack(key, url, { logLevel });
 
-			// eslint-disable-next-line @typescript-eslint/naming-convention
-			const { PostHog } = await import('posthog-node');
-			this.postHog = new PostHog(config.getEnv('diagnostics.config.posthog.apiKey'), {
-				host: config.getEnv('diagnostics.config.posthog.apiHost'),
-			});
-
 			this.startPulse();
 		}
 	}
@@ -137,10 +129,8 @@ export class Telemetry {
 	async trackN8nStop(): Promise<void> {
 		clearInterval(this.pulseIntervalReference);
 		void this.track('User instance stopped');
-		return new Promise<void>((resolve) => {
-			if (this.postHog) {
-				this.postHog.shutdown();
-			}
+		return new Promise<void>(async (resolve) => {
+			await this.postHog.stop();
 
 			if (this.rudderStack) {
 				this.rudderStack.flush(resolve);
@@ -192,11 +182,7 @@ export class Telemetry {
 				};
 
 				if (withPostHog) {
-					this.postHog?.capture({
-						distinctId: payload.userId,
-						sendFeatureFlags: true,
-						...payload,
-					});
+					this.postHog?.track(payload);
 				}
 
 				return this.rudderStack.track(payload, resolve);
@@ -206,19 +192,7 @@ export class Telemetry {
 		});
 	}
 
-	async isFeatureFlagEnabled(
-		featureFlagName: string,
-		{ user_id: userId }: ITelemetryTrackProperties = {},
-	): Promise<boolean | undefined> {
-		if (!this.postHog) return Promise.resolve(false);
-
-		const fullId = [this.instanceId, userId].join('#');
-
-		return this.postHog.isFeatureEnabled(featureFlagName, fullId);
-	}
-
 	// test helpers
-
 	getCountsBuffer(): IExecutionsBuffer {
 		return this.executionCountsBuffer;
 	}