Add a helper to convert context attributes to subject attributes

Author: sameerank

src/client/eppo-precomputed-client.ts

@@ -20,7 +20,7 @@ import { DecodedPrecomputedFlag, PrecomputedFlag, VariationType } from '../inter
 import { decodeBase64, getMD5Hash } from '../obfuscation';
 import initPoller, { IPoller } from '../poller';
 import PrecomputedRequestor from '../precomputed-requestor';
-import { Attributes } from '../types';
+import { Attributes, ContextAttributes } from '../types';
 import { validateNotBlank } from '../validation';
 import { LIB_VERSION } from '../version';
 
@@ -45,6 +45,15 @@ export type PrecomputedFlagsRequestParameters = {
   skipInitialPoll?: boolean;
 };
 
+export function convertContextAttributesToSubjectAttributes(
+  contextAttributes: ContextAttributes,
+): Attributes {
+  return {
+    ...(contextAttributes.numericAttributes || {}),
+    ...(contextAttributes.categoricalAttributes || {}),
+  };
+}
+
 export default class EppoPrecomputedClient {
   private readonly queuedAssignmentEvents: IAssignmentEvent[] = [];
   private assignmentLogger?: IAssignmentLogger;

src/index.ts

@@ -21,6 +21,7 @@ import EppoClient, {
   IContainerExperiment,
 } from './client/eppo-client';
 import EppoPrecomputedClient, {
+  convertContextAttributesToSubjectAttributes,
   PrecomputedFlagsRequestParameters,
 } from './client/eppo-precomputed-client';
 import { IConfigurationWire, IPrecomputedConfigurationResponse } from './configuration';
@@ -75,6 +76,7 @@ export {
   // Precomputed Client
   PrecomputedFlagsRequestParameters,
   EppoPrecomputedClient,
+  convertContextAttributesToSubjectAttributes,
 
   // Configuration store
   IConfigurationStore,