Add experiments allocation function to RoktManager

Author: patrick-wu

src/roktManager.ts

@@ -56,6 +56,12 @@ export interface IRoktManagerOptions {
     sandbox?: boolean;
 }
 
+export interface IRoktExperimentAllocation {
+    userId: string;
+    experimentId: string;
+    bucketId: string;
+}
+
 // The purpose of this class is to create a link between the Core mParticle SDK and the
 // Rokt Web SDK via a Web Kit.
 // The Rokt Manager should load before the Web Kit and stubs out many of the
@@ -72,9 +78,13 @@ export default class RoktManager {
     private currentUser: IMParticleUser | null = null;
     private filteredUser: IMParticleUser | null = null;
     private messageQueue: IRoktMessage[] = [];
+
     private sandbox: boolean | null = null;
     private placementAttributesMapping: Dictionary<string>[] = [];
 
+    private experimentAllocation: IRoktExperimentAllocation | null = null;
+
+
     /**
      * Initializes the RoktManager with configuration settings and user data.
      * 
@@ -112,6 +122,12 @@ export default class RoktManager {
     }
 
     public selectPlacements(options: IRoktSelectPlacementsOptions): Promise<IRoktSelection> {
+        if (this.experimentAllocation) {
+            options.attributes['rokt.experimentid'] = this.experimentAllocation.experimentId;
+            options.attributes['rokt.bucketid'] = this.experimentAllocation.bucketId;
+            options.attributes['rokt.userid'] = this.experimentAllocation.userId;
+        }
+
         if (!this.isReady()) {
             this.queueMessage({
                 methodName: 'selectPlacements',
@@ -176,6 +192,15 @@ export default class RoktManager {
         }
     }
 
+    public setExperimentAllocationData(userId: string, experimentId: string, bucketId: string): void {
+        this.experimentAllocation = {
+            userId,
+            experimentId,
+            bucketId,
+        };
+
+    }
+
     private isReady(): boolean {
         // The Rokt Manager is ready when a kit is attached and has a launcher
         return Boolean(this.kit && this.kit.launcher);