Public Dashboards: Query Caching (#51403)

* passes id and uid to PublicDashboardDatasource

* betterer results

* If for a public dashboard, return the PublicDashboardDataSource first or else getDatasourceSrv.get() will fail bc of no authed user.

Added some unit tests for resolving the uid from the many possible datasource types.

* updates betterer

* Exports DashboardService. Adds method to DashboardService to build anonymous user for use with public dashboards where there is no authed user. Adds method on dashboard_queries to get all dashboard uids from a dashboard.

* refactors to get unique datasource uids

* Adds tests for getting all unique datasource uids off a dashboard

* adds test for building anonymous user with read and query actions that are scoped to each datasource uid in the dashboard

* updates casing of DashboardService

* updates test case to have additional panel with a different datasource

* gives default interval to public dashboard data source

packages/grafana-runtime/src/utils/PublicDashboardDataSource.test.ts

@@ -1,9 +1,14 @@
 import { of } from 'rxjs';
 import { BackendSrv, BackendSrvRequest } from 'src/services';
 
-import { DataQueryRequest, DataSourceRef } from '@grafana/data';
+import { DataQueryRequest, DataSourceInstanceSettings, DataSourceRef } from '@grafana/data';
 
-import { PublicDashboardDataSource } from '../../../../public/app/features/dashboard/services/PublicDashboardDataSource';
+import {
+  PUBLIC_DATASOURCE,
+  PublicDashboardDataSource,
+} from '../../../../public/app/features/dashboard/services/PublicDashboardDataSource';
+
+import { DataSourceWithBackend } from './DataSourceWithBackend';
 
 const mockDatasourceRequest = jest.fn();
 
@@ -28,7 +33,7 @@ describe('PublicDashboardDatasource', () => {
     mockDatasourceRequest.mockReset();
     mockDatasourceRequest.mockReturnValue(Promise.resolve({}));
 
-    const ds = new PublicDashboardDataSource();
+    const ds = new PublicDashboardDataSource('public');
     const panelId = 1;
     const publicDashboardAccessToken = 'abc123';
 
@@ -47,4 +52,27 @@ describe('PublicDashboardDatasource', () => {
       `/api/public/dashboards/${publicDashboardAccessToken}/panels/${panelId}/query`
     );
   });
+
+  test('returns public datasource uid when datasource passed in is null', () => {
+    let ds = new PublicDashboardDataSource(null);
+    expect(ds.uid).toBe(PUBLIC_DATASOURCE);
+  });
+
+  test('returns datasource when datasource passed in is a string', () => {
+    let ds = new PublicDashboardDataSource('theDatasourceUid');
+    expect(ds.uid).toBe('theDatasourceUid');
+  });
+
+  test('returns datasource uid when datasource passed in is a DataSourceRef implementation', () => {
+    const datasource = { type: 'datasource', uid: 'abc123' };
+    let ds = new PublicDashboardDataSource(datasource);
+    expect(ds.uid).toBe('abc123');
+  });
+
+  test('returns datasource uid when datasource passed in is a DatasourceApi instance', () => {
+    const settings: DataSourceInstanceSettings = { id: 1, uid: 'abc123' } as DataSourceInstanceSettings;
+    const datasource = new DataSourceWithBackend(settings);
+    let ds = new PublicDashboardDataSource(datasource);
+    expect(ds.uid).toBe('abc123');
+  });
 });