[FSSDK-10882] ssr support addition

Author: junaed-optimizely

lib/optimizely/index.ts

@@ -146,6 +146,7 @@ export default class Optimizely implements Client {
       this.updateOdpSettings();
     });
 
+    this.projectConfigManager.setSsr(config.isSsr) 
     this.projectConfigManager.start();
     const projectConfigManagerRunningPromise = this.projectConfigManager.onRunning();
 

lib/project_config/project_config_manager.ts

@@ -34,6 +34,7 @@ interface ProjectConfigManagerConfig {
 
 export interface ProjectConfigManager extends Service {
   setLogger(logger: LoggerFacade): void;
+  setSsr(isSsr?: boolean): void;
   getConfig(): ProjectConfig | undefined;
   getOptimizelyConfig(): OptimizelyConfig | undefined;
   onUpdate(listener: Consumer<ProjectConfig>): Fn;
@@ -54,6 +55,7 @@ export class ProjectConfigManagerImpl extends BaseService implements ProjectConf
   public datafileManager?: DatafileManager;
   private eventEmitter: EventEmitter<{ update: ProjectConfig }> = new EventEmitter();
   private logger?: LoggerFacade;
+  private isSsr?: boolean;
 
   constructor(config: ProjectConfigManagerConfig) {
     super();
@@ -79,6 +81,11 @@ export class ProjectConfigManagerImpl extends BaseService implements ProjectConf
       return;
     }
 
+    if(this.isSsr) {
+      // If isSsr is true, we don't need to poll for datafile updates 
+      this.datafileManager = undefined 
+    }
+
     if (this.datafile) {
       this.handleNewDatafile(this.datafile, true);
     }
@@ -216,4 +223,13 @@ export class ProjectConfigManagerImpl extends BaseService implements ProjectConf
       this.stopPromise.reject(err);
     });
   }
+
+  /**
+   * Set the isSsr flag to indicate if the project config manager is being used in a server side rendering environment 
+   * @param {Boolean} isSsr  
+   * @returns {void}
+   */
+  setSsr(isSsr?: boolean): void {
+    this.isSsr = isSsr;
+  }
 }

lib/shared_types.ts

@@ -291,6 +291,7 @@ export interface OptimizelyOptions {
   sdkKey?: string;
   userProfileService?: UserProfileService | null;
   defaultDecideOptions?: OptimizelyDecideOption[];
+  isSsr?:boolean;
   odpManager?: IOdpManager;
   notificationCenter: NotificationCenterImpl;
 }

lib/tests/mock/mock_project_config_manager.ts

@@ -28,6 +28,7 @@ export const getMockProjectConfigManager = (opt: MockOpt = {}): ProjectConfigMan
   return {
     config: opt.initConfig,
     start: () => {},
+    setSsr: () => {},
     onRunning: () => opt.onRunning || Promise.resolve(),
     stop: () => {},
     onTerminated: () => opt.onTerminated || Promise.resolve(),