feat: add configuration option for disabling legacy api

src/lib/create-config.ts

@@ -287,6 +287,10 @@ export function createConfig(options: IUnleashOptions): IUnleashConfig {
     const enableOAS =
         options.enableOAS || safeBoolean(process.env.ENABLE_OAS, false);
 
+    const disableLegacyFeaturesApi =
+        options.disableLegacyFeaturesApi ||
+        safeBoolean(process.env.DISABLE_LEGACY_FEATURES_API, false);
+
     return {
         db,
         session,
@@ -301,6 +305,7 @@ export function createConfig(options: IUnleashOptions): IUnleashConfig {
         email,
         secureHeaders,
         enableOAS,
+        disableLegacyFeaturesApi,
         preHook: options.preHook,
         preRouterHook: options.preRouterHook,
         eventHook: options.eventHook,

src/lib/routes/admin-api/index.ts

@@ -30,10 +30,14 @@ class AdminApi extends Controller {
         super(config);
 
         this.app.get('/', this.index);
-        this.app.use(
+
-            '/features',
+        if (!config.disableLegacyFeaturesApi) {
-            new FeatureController(config, services).router,
+            this.app.use(
-        );
+                '/features',
+                new FeatureController(config, services).router,
+            );
+        }
+
         this.app.use(
             '/feature-types',
             new FeatureTypeController(config, services).router,

src/lib/types/option.ts

@@ -101,6 +101,7 @@ export interface IUnleashOptions {
     preRouterHook?: Function;
     eventHook?: EventHook;
     enterpriseVersion?: string;
+    disableLegacyFeaturesApi?: boolean;
 }
 
 export interface IEmailOption {
@@ -156,4 +157,5 @@ export interface IUnleashConfig {
     eventHook?: EventHook;
     enterpriseVersion?: string;
     eventBus: EventEmitter;
+    disableLegacyFeaturesApi?: boolean;
 }

src/test/e2e/api/admin/feature.e2e.test.ts

@@ -1,7 +1,11 @@
 import faker from 'faker';
 import { FeatureToggleDTO, IStrategyConfig, IVariant } from 'lib/types/model';
 import dbInit, { ITestDb } from '../../helpers/database-init';
-import { IUnleashTest, setupApp } from '../../helpers/test-helper';
+import {
+    IUnleashTest,
+    setupApp,
+    setupAppWithCustomConfig,
+} from '../../helpers/test-helper';
 import getLogger from '../../../fixtures/no-logger';
 import { DEFAULT_ENV } from '../../../../lib/util/constants';
 
@@ -680,3 +684,21 @@ test('marks feature toggle as stale', async () => {
         expect(res.body.stale).toBe(true);
     });
 });
+
+test('should not hit endpoints if disable configuration is set', async () => {
+    const appWithDisabledLegacyFeatures = await setupAppWithCustomConfig(
+        db.stores,
+        {
+            disableLegacyFeaturesApi: true,
+        },
+    );
+
+    await appWithDisabledLegacyFeatures.request
+        .get('/api/admin/features')
+        .expect(404);
+
+    return appWithDisabledLegacyFeatures.request
+        .get('/api/admin/features/featureX')
+        .expect('Content-Type', /json/)
+        .expect(404);
+});