[Usage Collection] Remove unused applicationUsageTracker

src/plugins/kibana_usage_collection/server/collectors/application_usage/README.md

@@ -70,17 +70,6 @@ Application Usage will automatically track the active minutes on screen and clic
 
 The prop `viewId` is used as a unique identifier for your plugin. The Application Id is automatically attached to the tracked usage, based on the ID used when registering your app via `core.application.register`.
 
-#### Advanced Usage
-
-If you have a custom use case not provided by the Application Usage helpers you can use the `usageCollection.applicationUsageTracker` public api directly.
-
-To start tracking a view: `applicationUsageTracker.trackApplicationViewUsage(viewId)`
-Calling this method will marks the specified `viewId` as active. applicationUsageTracker will start tracking clicks and screen minutes for the view.
-
-To stop tracking a view: `applicationUsageTracker.flushTrackedView(viewId)`
-Calling this method will stop tracking the clicks and screen minutes for that view. Usually once the view is no longer active.
-
-
 ## Application Usage Telemetry Data
 
 This collector reports the number of general clicks and minutes on screen for each registered application in Kibana.

src/plugins/usage_collection/public/mocks.tsx

@@ -13,11 +13,20 @@ import { ApplicationUsageContext } from './components/track_application_view';
 
 export type Setup = jest.Mocked<UsageCollectionSetup>;
 
-export const createApplicationUsageTrackerMock = (): ApplicationUsageTracker => {
-  const applicationUsageTrackerMock: jest.Mocked<ApplicationUsageTracker> = {
-    setCurrentAppId: jest.fn(),
+// This is to avoid having to mock every private property of the class
+type ApplicationUsageTrackerPublic = Pick<ApplicationUsageTracker, keyof ApplicationUsageTracker>;
+
+export const createApplicationUsageTrackerMock = (): ApplicationUsageTrackerPublic => {
+  const applicationUsageTrackerMock: jest.Mocked<ApplicationUsageTrackerPublic> = {
     trackApplicationViewUsage: jest.fn(),
-  } as any;
+    flushTrackedView: jest.fn(),
+    updateViewClickCounter: jest.fn(),
+    setCurrentAppId: jest.fn(),
+    start: jest.fn(),
+    stop: jest.fn(),
+    pauseTrackingAll: jest.fn(),
+    resumeTrackingAll: jest.fn(),
+  };
 
   return applicationUsageTrackerMock;
 };
@@ -32,7 +41,6 @@ const createSetupContract = (): Setup => {
         </ApplicationUsageContext.Provider>
       ),
     },
-    applicationUsageTracker: applicationUsageTrackerMock,
     reportUiCounter: jest.fn(),
   };
 

src/plugins/usage_collection/public/plugin.tsx

@@ -35,16 +35,11 @@ export interface UsageCollectionSetup {
   components: {
     ApplicationUsageTrackingProvider: React.FC;
   };
-  applicationUsageTracker: IApplicationUsageTracker;
   reportUiCounter: Reporter['reportUiCounter'];
 }
 
 export interface UsageCollectionStart {
   reportUiCounter: Reporter['reportUiCounter'];
-  applicationUsageTracker: Pick<
-    ApplicationUsageTracker,
-    'trackApplicationViewUsage' | 'flushTrackedView' | 'updateViewClickCounter'
-  >;
 }
 
 export function isUnauthenticated(http: HttpSetup) {
@@ -83,7 +78,6 @@ export class UsageCollectionPlugin implements Plugin<UsageCollectionSetup, Usage
           </ApplicationUsageContext.Provider>
         ),
       },
-      applicationUsageTracker,
       reportUiCounter: this.reporter.reportUiCounter,
     };
   }
@@ -105,7 +99,6 @@ export class UsageCollectionPlugin implements Plugin<UsageCollectionSetup, Usage
     this.reporter.reportUserAgent('kibana');
 
     return {
-      applicationUsageTracker: this.getPublicApplicationUsageTracker(),
       reportUiCounter: this.reporter.reportUiCounter,
     };
   }

src/plugins/usage_collection/public/services/application_usage.ts

@@ -18,7 +18,10 @@ const DO_NOT_REPORT = ['kibana'];
 
 export function trackApplicationUsageChange(
   currentAppId$: Observable<string | undefined>,
-  applicationUsageTracker: ApplicationUsageTracker
+  applicationUsageTracker: Pick<
+    ApplicationUsageTracker,
+    'updateViewClickCounter' | 'setCurrentAppId' | 'trackApplicationViewUsage'
+  >
 ) {
   const windowClickSubscrition = fromEvent(window, 'click').subscribe(() => {
     applicationUsageTracker.updateViewClickCounter(MAIN_APP_DEFAULT_VIEW_ID);