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/editor-ui/src/Interface.ts

@@ -30,6 +30,7 @@ import {
 	IDisplayOptions,
 	IExecutionsSummary,
 	IAbstractEventMessage,
+	FeatureFlags,
 } from 'n8n-workflow';
 import { SignInType } from './constants';
 import { FAKE_DOOR_FEATURES, TRIGGER_NODE_FILTER, REGULAR_NODE_FILTER } from './constants';
@@ -37,6 +38,37 @@ import { BulkCommand, Undoable } from '@/models/history';
 
 export * from 'n8n-design-system/types';
 
+declare global {
+	interface Window {
+		posthog?: {
+			init(
+				key: string,
+				options?: {
+					api_host?: string;
+					autocapture?: boolean;
+					disable_session_recording?: boolean;
+					debug?: boolean;
+					bootstrap?: {
+						distinctId?: string;
+						isIdentifiedID?: boolean;
+						featureFlags: FeatureFlags;
+					};
+				},
+			): void;
+			isFeatureEnabled?(flagName: string): boolean;
+			getFeatureFlag?(flagName: string): boolean | string;
+			identify?(
+				id: string,
+				userProperties?: Record<string, string | number>,
+				userPropertiesOnce?: Record<string, string>,
+			): void;
+			reset?(resetDeviceId?: boolean): void;
+			onFeatureFlags?(callback: (keys: string[], map: FeatureFlags) => void): void;
+			reloadFeatureFlags?(): void;
+		};
+	}
+}
+
 export type EndpointStyle = {
 	width?: number;
 	height?: number;
@@ -551,13 +583,17 @@ export interface IUserResponse {
 	signInType?: SignInType;
 }
 
+export interface CurrentUserResponse extends IUserResponse {
+	featureFlags?: FeatureFlags;
+}
+
 export interface IUser extends IUserResponse {
 	isDefaultUser: boolean;
 	isPendingUser: boolean;
 	isOwner: boolean;
 	inviteAcceptUrl?: string;
 	fullName?: string;
-	createdAt?: Date;
+	createdAt?: string;
 }
 
 export interface IVersionNotificationSettings {
@@ -704,6 +740,14 @@ export interface IN8nUISettings {
 		enabled: boolean;
 		host: string;
 	};
+	posthog: {
+		enabled: boolean;
+		apiHost: string;
+		apiKey: string;
+		autocapture: boolean;
+		disableSessionRecording: boolean;
+		debug: boolean;
+	};
 	executionMode: string;
 	pushBackend: 'sse' | 'websocket';
 	communityNodesEnabled: boolean;