Feature: Add flighting support

package.json

@@ -32,6 +32,7 @@
                 "eslint-plugin-react": "7.32.2",
                 "eslint-webpack-plugin": "4.0.1",
                 "express": "4.18.2",
+                "expvariantassignmentsdk": "file:packages/expvariantassignmentsdk-1.0.0.tgz",
                 "file-loader": "6.2.0",
                 "fork-ts-checker-webpack-plugin": "8.0.0",
                 "fs-extra": "11.1.1",

src/app/middleware/localStorageMiddleware.ts

@@ -1,20 +1,21 @@
 import { collectionsCache } from '../../modules/cache/collections.cache';
 import { resourcesCache } from '../../modules/cache/resources.cache';
 import { samplesCache } from '../../modules/cache/samples.cache';
-import { saveTheme } from '../../themes/theme-utils';
 import { AppAction } from '../../types/action';
 import { ResourcePath } from '../../types/resources';
 import { addResourcePaths } from '../services/actions/collections-action-creators';
+import { CURRENT_THEME } from '../services/graph-constants';
 import { getUniquePaths } from '../services/reducers/collections-reducer.util';
 import {
   CHANGE_THEME_SUCCESS, COLLECTION_CREATE_SUCCESS, FETCH_RESOURCES_ERROR, FETCH_RESOURCES_SUCCESS,
   RESOURCEPATHS_ADD_SUCCESS, RESOURCEPATHS_DELETE_SUCCESS, SAMPLES_FETCH_SUCCESS
 } from '../services/redux-constants';
+import { saveToLocalStorage } from '../utils/local-storage';
 
 const localStorageMiddleware = (store: any) => (next: any) => async (action: AppAction) => {
   switch (action.type) {
     case CHANGE_THEME_SUCCESS:
-      saveTheme(action.response);
+      saveToLocalStorage(CURRENT_THEME,action.response);
       break;
 
     case SAMPLES_FETCH_SUCCESS:

src/app/services/graph-constants.ts

@@ -32,3 +32,5 @@ export const REVOKING_PERMISSIONS_REQUIRED_SCOPES = 'DelegatedPermissionGrant.Re
 export const ADMIN_CONSENT_DOC_LINK = 'https://learn.microsoft.com/en-us/graph/security-authorization#:~:text=If%20you%27re%20calling%20the%20Microsoft%20Graph%20Security%20API%20from%20Graph%20Explorer'
 // eslint-disable-next-line max-len
 export const CONSENT_TYPE_DOC_LINK = 'https://learn.microsoft.com/en-us/graph/api/resources/oauth2permissiongrant?view=graph-rest-1.0#:~:text=(eq%20only).-,consentType,-String'
+export const CURRENT_THEME='CURRENT_THEME';
+export const EXP_URL='https://default.exp-tas.com/exptas76/9b835cbf-9742-40db-84a7-7a323a77f3eb-gedev/api/v1/tas'

src/app/services/variant-constants.ts

@@ -0,0 +1 @@
+export const ALWAYSSHOWBUTTONS = 'alwaysShowButtons';

src/app/services/variant-service.ts

@@ -0,0 +1,68 @@
+/* eslint-disable max-len */
+import { VariantAssignmentRequest } from 'expvariantassignmentsdk/src/interfaces/VariantAssignmentRequest';
+import {VariantAssignmentServiceClient} from 'expvariantassignmentsdk/src/contracts/VariantAssignmentServiceClient';
+import { VariantAssignmentClientSettings } from 'expvariantassignmentsdk/src/contracts/VariantAssignmentClientSettings';
+import { errorTypes, telemetry } from '../../telemetry';
+import { readFromLocalStorage, saveToLocalStorage } from '../utils/local-storage';
+import { EXP_URL } from './graph-constants';
+import { SeverityLevel } from '@microsoft/applicationinsights-web';
+
+
+interface TasResponse {
+  Id: string;
+  Parameters: Parameters;
+}
+interface Parameters {
+  [key: string]: string | boolean | number;
+}
+class VariantService {
+
+  private endpoint = EXP_URL;
+  private expResponse: TasResponse[] | null = [];
+  private assignmentContext: string = '';
+
+  public async initialize() {
+    const settings: VariantAssignmentClientSettings = { endpoint: this.endpoint };
+    this.createUser();
+    const request: VariantAssignmentRequest =
+        {
+          parameters: this.getParameters()
+        };
+
+    const client = new VariantAssignmentServiceClient(settings);
+    const response = await client.getVariantAssignments(request);
+    Promise.resolve(response).then((r) => {
+      if (r){
+        this.expResponse = r.featureVariables as TasResponse[] | null;
+        this.assignmentContext = r.assignmentContext;
+      }
+    })
+      .catch((error) => {
+        telemetry.trackException(new Error(errorTypes.UNHANDLED_ERROR), SeverityLevel.Error, error);
+      });
+  }
+
+  public createUser() {
+    const userid = telemetry.getUserId();
+    saveToLocalStorage('userid', userid.toString());
+  }
+
+  public getAssignmentContext() {
+    return this.assignmentContext;
+  }
+
+  public async getFeatureVariables(namespace: string, flagname: string) {
+    const defaultConfig = this.expResponse?.find(c => c.Id === namespace);
+    return defaultConfig?.Parameters[flagname];
+  }
+
+  // Parameters will include randomization units (you can have more than one in a single call!)
+  // and audience filters like market/region, browser, ismsft etc.,
+  private getParameters(): Map<string, string[]> {
+    const map: Map<string, string[]> = new Map<string, string[]>();
+    map.set('userid', [readFromLocalStorage('userid')]);
+    return map;
+  }
+}
+
+export default new VariantService();

src/app/utils/local-storage.ts

@@ -0,0 +1,17 @@
+export const saveToLocalStorage = (key: string, value: Object|string) => {
+  if (typeof value === 'string') {
+    localStorage.setItem(key, value);
+  } else {
+    localStorage.setItem(key, JSON.stringify(value));
+  }
+};
+
+export const readFromLocalStorage = (key: string) => {
+  const value = localStorage.getItem(key);
+
+  if (value && typeof value === 'object') {
+    return JSON.parse(value);
+  } else{
+    return value;
+  }
+};

src/index.tsx

@@ -26,16 +26,18 @@ import './styles/index.scss';
 import { telemetry } from './telemetry';
 import ITelemetry from './telemetry/ITelemetry';
 import { loadGETheme } from './themes';
-import { readTheme } from './themes/theme-utils';
+import { readFromLocalStorage } from './app/utils/local-storage';
 import { IDevxAPI } from './types/devx-api';
 import { Mode } from './types/enums';
 import { Collection } from './types/resources';
+import variantService from './app/services/variant-service';
+import { CURRENT_THEME } from './app/services/graph-constants';
 
 
 const appRoot: HTMLElement = document.getElementById('root')!;
 initializeIcons();
 
-let currentTheme = readTheme() || 'light';
+let currentTheme = readFromLocalStorage(CURRENT_THEME) || 'light';
 export function removeSpinners() {
   // removes the loading spinner from GE html after the app is loaded
   const spinner = document.getElementById('spinner');
@@ -54,7 +56,7 @@ export function removeSpinners() {
 }
 
 function setCurrentSystemTheme(): void {
-  const themeFromLocalStorage = readTheme();
+  const themeFromLocalStorage = readFromLocalStorage(CURRENT_THEME);
 
   if (themeFromLocalStorage) {
     currentTheme = themeFromLocalStorage;
@@ -161,6 +163,7 @@ function loadResources() {
 }
 loadResources();
 
+variantService.initialize();
 const telemetryProvider: ITelemetry = telemetry;
 telemetryProvider.initialize();
 

src/telemetry/ITelemetry.ts

@@ -16,4 +16,5 @@ export default interface ITelemetry {
     severityLevel: SeverityLevel,
     properties: {}
   ): void;
+  getUserId():string
 }

src/telemetry/telemetry.ts

@@ -32,6 +32,7 @@ import {
   getBrowserScreenSize,
   getDeviceScreenScale
 } from '../app/utils/device-characteristics-telemetry';
+import variantService from '../app/services/variant-service';
 
 class Telemetry implements ITelemetry {
   private appInsights: ApplicationInsights;
@@ -66,8 +67,10 @@ class Telemetry implements ITelemetry {
     this.appInsights.context.application.ver = getVersion().toString();
   }
 
-  public trackEvent(name: string, properties: {}) {
-    this.appInsights.trackEvent({ name, properties });
+  public trackEvent(name: string, properties:{ AssignmentContext?: string, [key: string]: any } = {}) {
+    const defaultProperties = { AssignmentContext: variantService.getAssignmentContext() };
+    const mergedProperties = { ...defaultProperties, ...properties };
+    this.appInsights.trackEvent({ name, properties: mergedProperties });
   }
 
   public trackException(
@@ -140,6 +143,15 @@ class Telemetry implements ITelemetry {
       ''
     );
   }
+
+  public getUserId(){
+    try {
+      const userId = document.cookie.split(';').filter((item) => item.trim().startsWith('ai_user')).map((item) => item.split('=')[1])[0];
+      return userId.split('|')[0];
+    } catch (error) {
+      return '';
+    }
+  }
 }
 
 export const telemetry = new Telemetry();

src/themes/theme-utils.spec.ts

@@ -1,9 +1,10 @@
-import { saveTheme, readTheme } from './theme-utils';
+import { CURRENT_THEME } from '../app/services/graph-constants';
+import { readFromLocalStorage, saveToLocalStorage } from '../app/utils/local-storage';
 
 describe('Tests theme utils should', () => {
   it('save theme to local storage then retrieve the saved theme', () => {
     const theme = 'dark';
-    saveTheme(theme);
-    expect(readTheme()).toEqual(theme);
+    saveToLocalStorage(CURRENT_THEME,theme);
+    expect(readFromLocalStorage(CURRENT_THEME)).toEqual(theme);
   })
 })