chore: features json to typescript with ENV overwrite support

src/controllers/misc.ts

@@ -21,7 +21,7 @@ export class MiscController {
   }
 
   public static features(ctx: Context) {
-    ctx.body = MiscService.getFetaures();
+    ctx.body = MiscService.getFeatures();
     ctx.status = 200;
     return ctx;
   }

src/features.ts

@@ -0,0 +1,116 @@
+interface FeaturesConfig {
+  routerTransform: Record<string, boolean>;
+  regulations: string[];
+  supportSourceTransformV1: boolean;
+  supportTransformerProxyV1: boolean;
+  upgradedToSourceTransformV2?: boolean;
+}
+
+const defaultFeaturesConfig: FeaturesConfig = {
+  routerTransform: {
+    ACTIVE_CAMPAIGN: true,
+    ALGOLIA: true,
+    CANDU: true,
+    DELIGHTED: true,
+    DRIP: true,
+    FB_CUSTOM_AUDIENCE: true,
+    GA: true,
+    GAINSIGHT: true,
+    GAINSIGHT_PX: true,
+    GOOGLESHEETS: true,
+    GOOGLE_ADWORDS_ENHANCED_CONVERSIONS: true,
+    GOOGLE_ADWORDS_REMARKETING_LISTS: true,
+    GOOGLE_ADWORDS_OFFLINE_CONVERSIONS: true,
+    HS: true,
+    ITERABLE: true,
+    KLAVIYO: true,
+    KUSTOMER: true,
+    MAILCHIMP: true,
+    MAILMODO: true,
+    MARKETO: true,
+    OMETRIA: true,
+    PARDOT: true,
+    PINTEREST_TAG: true,
+    PROFITWELL: true,
+    SALESFORCE: true,
+    SALESFORCE_OAUTH: true,
+    SALESFORCE_OAUTH_SANDBOX: true,
+    SFMC: true,
+    SNAPCHAT_CONVERSION: true,
+    TIKTOK_ADS: true,
+    TRENGO: true,
+    YAHOO_DSP: true,
+    CANNY: true,
+    LAMBDA: true,
+    WOOTRIC: true,
+    GOOGLE_CLOUD_FUNCTION: true,
+    BQSTREAM: true,
+    CLICKUP: true,
+    FRESHMARKETER: true,
+    FRESHSALES: true,
+    MONDAY: true,
+    CUSTIFY: true,
+    USER: true,
+    REFINER: true,
+    FACEBOOK_OFFLINE_CONVERSIONS: true,
+    MAILJET: true,
+    SNAPCHAT_CUSTOM_AUDIENCE: true,
+    MARKETO_STATIC_LIST: true,
+    CAMPAIGN_MANAGER: true,
+    SENDGRID: true,
+    SENDINBLUE: true,
+    ZENDESK: true,
+    MP: true,
+    TIKTOK_ADS_OFFLINE_EVENTS: true,
+    CRITEO_AUDIENCE: true,
+    CUSTOMERIO: true,
+    BRAZE: true,
+    OPTIMIZELY_FULLSTACK: true,
+    TWITTER_ADS: true,
+    CLEVERTAP: true,
+    ORTTO: true,
+    GLADLY: true,
+    ONE_SIGNAL: true,
+    TIKTOK_AUDIENCE: true,
+    REDDIT: true,
+    THE_TRADE_DESK: true,
+    INTERCOM: true,
+    NINETAILED: true,
+    KOALA: true,
+    LINKEDIN_ADS: true,
+    BLOOMREACH: true,
+    MOVABLE_INK: true,
+    EMARSYS: true,
+    KODDI: true,
+    WUNDERKIND: true,
+    CLICKSEND: true,
+    ZOHO: true,
+    CORDIAL: true,
+    X_AUDIENCE: true,
+    BLOOMREACH_CATALOG: true,
+    SMARTLY: true,
+    HTTP: true,
+    AMAZON_AUDIENCE: true,
+    INTERCOM_V2: true,
+  },
+  regulations: [
+    'BRAZE',
+    'AM',
+    'INTERCOM',
+    'CLEVERTAP',
+    'AF',
+    'MP',
+    'GA',
+    'ITERABLE',
+    'ENGAGE',
+    'CUSTIFY',
+    'SENDGRID',
+    'SPRIG',
+    'EMARSYS',
+  ],
+  supportSourceTransformV1: true,
+  supportTransformerProxyV1: true,
+  upgradedToSourceTransformV2: process.env.UPGRADED_TO_SOURCE_TRANSFORM_V2 === 'true' || false, // redundant but required to show that the default is false
+};
+
+export default defaultFeaturesConfig;

src/services/__tests__/misc.test.ts

@@ -1,4 +1,5 @@
 import { DestHandlerMap } from '../../constants/destinationCanonicalNames';
+import defaultFeaturesConfig from '../../features';
 import { MiscService } from '../misc';
 
 describe('Misc tests', () => {
@@ -24,3 +25,42 @@ describe('Misc tests', () => {
     );
   });
 });
+
+describe('Misc | getFeatures', () => {
+  const originalEnv = process.env;
+
+  beforeEach(() => {
+    // Reset environment variables and module cache before each test
+    process.env = { ...originalEnv };
+    jest.resetModules();
+  });
+
+  afterAll(() => {
+    // Restore the original environment variables after all tests
+    process.env = originalEnv;
+  });
+
+  function getMiscService() {
+    // Re-import config and featuresService after environment variables are set
+    const { MiscService: miscService } = require('../misc');
+    return miscService;
+  }
+
+  it('should return the default configuration as a JSON string', () => {
+    const miscService = getMiscService();
+    const expectedConfig = JSON.stringify(defaultFeaturesConfig);
+    const result = miscService.getFeatures();
+    expect(result).toBe(expectedConfig);
+  });
+
+  it('should return configuration with upgradedToSourceTransformV2 overridden by environment variable', () => {
+    process.env.UPGRADED_TO_SOURCE_TRANSFORM_V2 = 'true';
+    const expectedConfig = {
+      ...defaultFeaturesConfig,
+      upgradedToSourceTransformV2: true,
+    };
+    const miscService = getMiscService();
+    const result = miscService.getFeatures();
+    expect(result).toBe(JSON.stringify(expectedConfig));
+  });
+});

src/services/misc.ts

@@ -1,10 +1,9 @@
 /* eslint-disable global-require, import/no-dynamic-require */
-import fs from 'fs';
 import { Context } from 'koa';
-import path from 'path';
 import { DestHandlerMap } from '../constants/destinationCanonicalNames';
 import { getCPUProfile, getHeapProfile } from '../middleware';
 import { Metadata } from '../types';
+import defaultFeaturesConfig from '../features';
 
 export class MiscService {
   public static getDestHandler(dest: string, version: string) {
@@ -62,9 +61,8 @@ export class MiscService {
     return process.env.npm_package_version || 'Version Info not found';
   }
 
-  public static getFetaures() {
-    const obj = JSON.parse(fs.readFileSync(path.resolve(__dirname, '../features.json'), 'utf8'));
-    return JSON.stringify(obj);
+  public static getFeatures() {
+    return JSON.stringify(defaultFeaturesConfig);
   }
 
   public static async getCPUProfile(seconds: number) {

test/apitests/service.api.test.ts

@@ -8,6 +8,7 @@ import request from 'supertest';
 import networkHandlerFactory from '../../src/adapters/networkHandlerFactory';
 import { FetchHandler } from '../../src/helpers/fetchHandlers';
 import { applicationRoutes } from '../../src/routes';
+import defaultFeaturesConfig from '../../src/features';
 
 let server: any;
 const OLD_ENV = process.env;
@@ -43,12 +44,9 @@ const getDataFromPath = (pathInput) => {
 
 describe('features tests', () => {
   test('successful features response', async () => {
-    const expectedData = JSON.parse(
-      fs.readFileSync(path.resolve(__dirname, '../../src/features.json'), 'utf8'),
-    );
     const response = await request(server).get('/features');
     expect(response.status).toEqual(200);
-    expect(JSON.parse(response.text)).toEqual(expectedData);
+    expect(JSON.parse(response.text)).toEqual(defaultFeaturesConfig);
   });
 
   test('features regulations should be array', async () => {