feat(launchdarkly-provider): Add tracking API

Author: tjosepo

libs/providers/launchdarkly-client/src/lib/launchdarkly-client-provider.spec.ts

@@ -27,6 +27,7 @@ describe('LaunchDarklyClientProvider', () => {
     waitForInitialization: jest.fn(),
     on: jest.fn(),
     close: jest.fn(),
+    track: jest.fn(),
   } as unknown as jest.Mocked<LDClient>;
 
   beforeAll(() => {
@@ -376,6 +377,12 @@ describe('LaunchDarklyClientProvider', () => {
     });
   });
 
+  it('calls the client track method properly', async () => {
+    ldClientMock.track = jest.fn().mockResolvedValue({});
+    ofClient.track('event-key-123abc', { customProperty: 123 });
+    expect(ldClientMock.track).toHaveBeenCalledWith('event-key-123abc', { customProperty: 123 });
+  });
+
   describe('onContextChange', () => {
     it('logs information about missing keys', async () => {
       ldClientMock.identify = jest.fn().mockResolvedValue({});

libs/providers/launchdarkly-client/src/lib/launchdarkly-client-provider.ts

@@ -11,6 +11,7 @@ import {
   OpenFeatureEventEmitter,
   ProviderEvents,
   ProviderStatus,
+  TrackingEventDetails,
 } from '@openfeature/web-sdk';
 
 import isEmpty from 'lodash.isempty';
@@ -153,6 +154,11 @@ export class LaunchDarklyClientProvider implements Provider {
     return wrongTypeResult(defaultValue);
   }
 
+  track(trackingEventName: string, _context: EvaluationContext, trackingEventDetails: TrackingEventDetails): void {
+    // The LD Client already has the context form the identify method, so we can omit it here.
+    this.client.track(trackingEventName, trackingEventDetails);
+  }
+
   private translateContext(context: EvaluationContext) {
     return translateContext(this.logger, context);
   }