Add additional telemetry dimension for EXP

sdk/feature-management-applicationinsights-browser/src/telemetry.ts

@@ -1,9 +1,19 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT license.
 
-import { EvaluationResult } from "@microsoft/feature-management";
-import { ApplicationInsights } from "@microsoft/applicationinsights-web";
-import { IEventTelemetry } from "@microsoft/applicationinsights-web";
+import { EvaluationResult, VariantAssignmentReason } from "@microsoft/feature-management";
+import { ApplicationInsights, IEventTelemetry } from "@microsoft/applicationinsights-web";
+import { EVALUATION_EVENT_VERSION } from "./version.js";
+
+const VERSION = "Version";
+const FEATURE_NAME = "FeatureName";
+const ENABLED = "Enabled";
+const TARGETING_ID = "TargetingId";
+const VARIANT = "Variant";
+const VARIANT_ASSIGNMENT_REASON = "VariantAssignmentReason";
+const DEFAULT_WHEN_ENABLED = "DefaultWhenEnabled";
+const VARIANT_ASSIGNMENT_PERCENTAGE = "VariantAssignmentPercentage";
+const FEATURE_EVALUATION_EVENT_NAME = "FeatureEvaluation";
 
 /**
  * Creates a telemetry publisher that sends feature evaluation events to Application Insights.
@@ -12,16 +22,46 @@ import { IEventTelemetry } from "@microsoft/applicationinsights-web";
  */
 export function createTelemetryPublisher(client: ApplicationInsights): (event: EvaluationResult) => void {
     return (event: EvaluationResult) => {
+        if (event.feature === undefined) {
+            return;
+        }
+
         const eventProperties = {
-            "FeatureName": event.feature ? event.feature.id : "",
-            "Enabled": event.enabled.toString(),
+            [VERSION]: EVALUATION_EVENT_VERSION,
+            [FEATURE_NAME]: event.feature ? event.feature.id : "",
+            [ENABLED]: event.enabled.toString(),
             // Ensure targetingId is string so that it will be placed in customDimensions
-            "TargetingId": event.targetingId ? event.targetingId.toString() : "",
-            "Variant": event.variant ? event.variant.name : "",
-            "VariantAssignmentReason": event.variantAssignmentReason,
+            [TARGETING_ID]: event.targetingId ? event.targetingId.toString() : "",
+            [VARIANT]: event.variant ? event.variant.name : "",
+            [VARIANT_ASSIGNMENT_REASON]: event.variantAssignmentReason,
         };
 
-        const metadata = event.feature?.telemetry?.metadata;
+        if (event.feature.allocation?.default_when_enabled) {
+            eventProperties[DEFAULT_WHEN_ENABLED] = event.feature.allocation.default_when_enabled;
+        }
+
+        if (event.variantAssignmentReason === VariantAssignmentReason.DefaultWhenEnabled) {
+            let percentileAllocationPercentage = 0;
+            if (event.variant !== undefined && event.feature.allocation !== undefined && event.feature.allocation.percentile !== undefined) {
+                for (const percentile of event.feature.allocation.percentile) {
+                    percentileAllocationPercentage += percentile.to - percentile.from;
+                }
+            }
+            eventProperties[VARIANT_ASSIGNMENT_PERCENTAGE] = (100 - percentileAllocationPercentage).toString();
+        }
+        else if (event.variantAssignmentReason === VariantAssignmentReason.Percentile) {
+            let percentileAllocationPercentage = 0;
+            if (event.variant !== undefined && event.feature.allocation !== undefined && event.feature.allocation.percentile !== undefined) {
+                for (const percentile of event.feature.allocation.percentile) {
+                    if (percentile.variant === event.variant.name) {
+                        percentileAllocationPercentage += percentile.to - percentile.from;
+                    }
+                }
+            }
+            eventProperties[VARIANT_ASSIGNMENT_PERCENTAGE] = percentileAllocationPercentage.toString();
+        }
+
+        const metadata = event.feature.telemetry?.metadata;
         if (metadata) {
             for (const key in metadata) {
                 if (!(key in eventProperties)) {
@@ -30,7 +70,7 @@ export function createTelemetryPublisher(client: ApplicationInsights): (event: E
             }
         }
 
-        client.trackEvent({ name: "FeatureEvaluation" }, eventProperties);
+        client.trackEvent({ name: FEATURE_EVALUATION_EVENT_NAME }, eventProperties);
     };
 }
 
@@ -47,6 +87,6 @@ export function createTelemetryPublisher(client: ApplicationInsights): (event: E
 export function trackEvent(client: ApplicationInsights, targetingId: string, event: IEventTelemetry, customProperties?: {[key: string]: any}): void {
     const properties = customProperties ? { ...customProperties } : {};
     // Ensure targetingId is string so that it will be placed in customDimensions
-    properties["TargetingId"] = targetingId ? targetingId.toString() : "";
+    properties[TARGETING_ID] = targetingId ? targetingId.toString() : "";
     client.trackEvent(event, properties);
 }

sdk/feature-management-applicationinsights-browser/src/version.ts

@@ -2,3 +2,4 @@
 // Licensed under the MIT license.
 
 export const VERSION = "2.0.0-preview.2";
+export const EVALUATION_EVENT_VERSION = "1.0.0";