feat: add api backward compatibility for more analytics modules

Signed-off-by: Camila Belo <camilaibs@gmail.com>

plugins/analytics-module-ga/package.json

@@ -32,6 +32,7 @@
     "@backstage/config": "workspace:^",
     "@backstage/core-components": "workspace:^",
     "@backstage/core-plugin-api": "workspace:^",
+    "@backstage/frontend-plugin-api": "workspace:^",
     "react-ga": "^3.3.0"
   },
   "peerDependencies": {

plugins/analytics-module-ga/src/apis/implementations/AnalyticsApi/GoogleAnalytics.test.ts

@@ -508,4 +508,63 @@ describe('GoogleAnalytics', () => {
       expect(lastData.queueTime).toBeUndefined();
     });
   });
+
+  describe('api backward compatibility', () => {
+    it('continue working with legacy App category', () => {
+      const api = GoogleAnalytics.fromConfig(basicValidConfig);
+
+      expect(api.captureEvent).toBeDefined();
+
+      api.captureEvent({
+        action: 'navigate',
+        subject: '/',
+        context,
+      });
+
+      const [command, data] = ReactGA.testModeAPI.calls[1];
+      expect(command).toBe('send');
+      expect(data).toMatchObject({
+        hitType: 'pageview',
+        page: '/',
+      });
+    });
+
+    it('use lowercase app as the new default category', () => {
+      const api = GoogleAnalytics.fromConfig(basicValidConfig);
+
+      expect(api.captureEvent).toBeDefined();
+
+      api.captureEvent({
+        action: 'navigate',
+        subject: '/',
+        context: { ...context, extensionId: '', extension: '' },
+      });
+
+      const [command, data] = ReactGA.testModeAPI.calls[1];
+      expect(command).toBe('send');
+      expect(data).toMatchObject({
+        hitType: 'pageview',
+        page: '/',
+      });
+    });
+
+    it('prioritize new context extension id over old extension property', () => {
+      const api = GoogleAnalytics.fromConfig(basicValidConfig);
+
+      expect(api.captureEvent).toBeDefined();
+
+      api.captureEvent({
+        action: 'navigate',
+        subject: '/',
+        context: { ...context, extensionId: 'app', extension: '' },
+      });
+
+      const [command, data] = ReactGA.testModeAPI.calls[1];
+      expect(command).toBe('send');
+      expect(data).toMatchObject({
+        hitType: 'pageview',
+        page: '/',
+      });
+    });
+  });
 });

plugins/analytics-module-ga/src/apis/implementations/AnalyticsApi/GoogleAnalytics.ts

@@ -22,6 +22,11 @@ import {
   AnalyticsEventAttributes,
   IdentityApi,
 } from '@backstage/core-plugin-api';
+import {
+  AnalyticsApi as NewAnalyticsApi,
+  AnalyticsEvent as NewAnalyticsEvent,
+  AnalyticsContextValue as NewAnalyticsContextValue,
+} from '@backstage/frontend-plugin-api';
 import { Config } from '@backstage/config';
 import { DeferredCapture } from '../../../util';
 import {
@@ -40,7 +45,7 @@ type CustomDimensionOrMetricConfig = {
  * Google Analytics API provider for the Backstage Analytics API.
  * @public
  */
-export class GoogleAnalytics implements AnalyticsApi {
+export class GoogleAnalytics implements AnalyticsApi, NewAnalyticsApi {
   private readonly cdmConfig: CustomDimensionOrMetricConfig[];
   private customUserIdTransform?: (userEntityRef: string) => Promise<string>;
   private readonly capture: DeferredCapture;
@@ -157,11 +162,15 @@ export class GoogleAnalytics implements AnalyticsApi {
    * pageview and the rest as custom events. All custom dimensions/metrics are
    * applied as they should be (set on pageview, merged object on events).
    */
-  captureEvent(event: AnalyticsEvent) {
+  captureEvent(event: AnalyticsEvent | NewAnalyticsEvent) {
     const { context, action, subject, value, attributes } = event;
     const customMetadata = this.getCustomDimensionMetrics(context, attributes);
 
-    if (action === 'navigate' && context.extension === 'App') {
+    const extensionId = context.extensionId || context.extension;
+    const category = extensionId ? String(extensionId) : 'app';
+
+    // The legacy default extension was 'App' and the new one is 'app'
+    if (action === 'navigate' && category.toLocaleLowerCase() === 'app') {
       this.capture.pageview(subject, customMetadata);
       return;
     }
@@ -184,7 +193,7 @@ export class GoogleAnalytics implements AnalyticsApi {
     }
 
     this.capture.event({
-      category: context.extension || 'App',
+      category,
       action,
       label: subject,
       value,
@@ -197,7 +206,7 @@ export class GoogleAnalytics implements AnalyticsApi {
    * Event Attributes, e.g. { dimension1: "some value", metric8: 42 }
    */
   private getCustomDimensionMetrics(
-    context: AnalyticsContextValue,
+    context: AnalyticsContextValue | NewAnalyticsContextValue,
     attributes: AnalyticsEventAttributes = {},
   ) {
     const customDimensionsMetrics: { [x: string]: string | number | boolean } =