fix: add feature metrics summary endpoint

src/lib/db/client-metrics-store-v2.ts

@@ -19,7 +19,8 @@ interface ClientMetricsEnvTable {
 
 const TABLE = 'client_metrics_env';
 
-function roundDownToHour(date) {
+// Unsure if this would be better be done by the service?
+export function roundDownToHour(date: Date): Date {
     let p = 60 * 60 * 1000; // milliseconds in an hour
     return new Date(Math.floor(date.getTime() / p) * p);
 }
@@ -72,7 +73,7 @@ export class ClientMetricsStoreV2 implements IClientMetricsStoreV2 {
     }
 
     deleteAll(): Promise<void> {
-        throw new Error('Method not implemented.');
+        return this.db(TABLE).del();
     }
 
     destroy(): void {

src/lib/routes/admin-api/client-metrics.ts

@@ -21,10 +21,11 @@ class ClientMetricsController extends Controller {
 
         this.metrics = clientMetricsServiceV2;
 
-        this.get('/features/:name', this.getFeatureToggleMetrics);
+        this.get('/features/:name/raw', this.getRawToggleMetrics);
+        this.get('/features/:name', this.getToggleMetricsSummary);
     }
 
-    async getFeatureToggleMetrics(req: Request, res: Response): Promise<void> {
+    async getRawToggleMetrics(req: Request, res: Response): Promise<void> {
         const { name } = req.params;
         const data = await this.metrics.getClientMetricsForToggle(name);
         res.json({
@@ -33,5 +34,15 @@ class ClientMetricsController extends Controller {
             data,
         });
     }
+
+    async getToggleMetricsSummary(req: Request, res: Response): Promise<void> {
+        const { name } = req.params;
+        const data = await this.metrics.getFeatureToggleMetricsSummary(name);
+        res.json({
+            version: 1,
+            maturity: 'experimental',
+            ...data,
+        });
+    }
 }
 export default ClientMetricsController;

src/lib/services/client-metrics/client-metrics-service-v2.ts

@@ -2,13 +2,12 @@ import { Logger } from '../../logger';
 import { IUnleashConfig } from '../../server-impl';
 import { IUnleashStores } from '../../types';
 import { IClientApp } from '../../types/model';
-import { GroupedClientMetrics } from '../../types/models/metrics';
+import { ToggleMetricsSummary } from '../../types/models/metrics';
 import {
     IClientMetricsEnv,
     IClientMetricsStoreV2,
 } from '../../types/stores/client-metrics-store-v2';
 import { clientMetricsSchema } from './client-metrics-schema';
-import { groupMetricsOnEnv } from './util';
 
 const FIVE_MINUTES = 5 * 60 * 1000;
 
@@ -57,14 +56,45 @@ export default class ClientMetricsServiceV2 {
         await this.clientMetricsStoreV2.batchInsertMetrics(clientMetrics);
     }
 
-    async getClientMetricsForToggle(
-        toggleName: string,
-    ): Promise<GroupedClientMetrics[]> {
+    // Overview over usage last "hour" bucket and all applications using the toggle
+    async getFeatureToggleMetricsSummary(
+        featureName: string,
+    ): Promise<ToggleMetricsSummary> {
         const metrics =
             await this.clientMetricsStoreV2.getMetricsForFeatureToggle(
-                toggleName,
+                featureName,
+                1,
+            );
+        const seenApplications =
+            await this.clientMetricsStoreV2.getSeenAppsForFeatureToggle(
+                featureName,
             );
 
-        return groupMetricsOnEnv(metrics);
+        const groupedMetrics = metrics.reduce((prev, curr) => {
+            if (prev[curr.environment]) {
+                prev[curr.environment].yes += curr.yes;
+                prev[curr.environment].no += curr.no;
+            } else {
+                prev[curr.environment] = {
+                    environment: curr.environment,
+                    timestamp: curr.timestamp,
+                    yes: curr.yes,
+                    no: curr.no,
+                };
+            }
+            return prev;
+        }, {});
+
+        return {
+            featureName,
+            lastHourUsage: Object.values(groupedMetrics),
+            seenApplications,
+        };
+    }
+
+    async getClientMetricsForToggle(
+        toggleName: string,
+    ): Promise<IClientMetricsEnv[]> {
+        return this.clientMetricsStoreV2.getMetricsForFeatureToggle(toggleName);
     }
 }

src/lib/services/client-metrics/util.test.ts

@@ -10,48 +10,3 @@ test('should return list of 24 horus', () => {
     expect(hours[2]).toStrictEqual(new Date(2021, 10, 10, 13, 0, 0));
     expect(hours[23]).toStrictEqual(new Date(2021, 10, 9, 16, 0, 0));
 });
-
-test('should group metrics together', () => {
-    const date = roundDownToHour(new Date());
-    const metrics: IClientMetricsEnv[] = [
-        {
-            featureName: 'demo',
-            appName: 'web',
-            environment: 'default',
-            timestamp: date,
-            yes: 2,
-            no: 2,
-        },
-        {
-            featureName: 'demo',
-            appName: 'web',
-            environment: 'default',
-            timestamp: date,
-            yes: 3,
-            no: 2,
-        },
-        {
-            featureName: 'demo',
-            appName: 'web',
-            environment: 'test',
-            timestamp: date,
-            yes: 1,
-            no: 3,
-        },
-    ];
-
-    const grouped = groupMetricsOnEnv(metrics);
-
-    expect(grouped[0]).toStrictEqual({
-        timestamp: date,
-        environment: 'default',
-        yes_count: 5,
-        no_count: 4,
-    });
-    expect(grouped[1]).toStrictEqual({
-        timestamp: date,
-        environment: 'test',
-        yes_count: 1,
-        no_count: 3,
-    });
-});

src/lib/services/client-metrics/util.ts

@@ -1,48 +1,2 @@
-import { GroupedClientMetrics } from '../../types/models/metrics';
-import { IClientMetricsEnv } from '../../types/stores/client-metrics-store-v2';
-
 //duplicate from client-metrics-store-v2.ts
-export function roundDownToHour(date: Date): Date {
-    let p = 60 * 60 * 1000; // milliseconds in an hour
-    return new Date(Math.floor(date.getTime() / p) * p);
-}
 
-export function generateLastNHours(n: number, start: Date): Date[] {
-    const nHours: Date[] = [];
-    nHours.push(roundDownToHour(start));
-    for (let i = 1; i < n; i++) {
-        const prev = nHours[i - 1];
-        const next = new Date(prev);
-        next.setHours(prev.getHours() - 1);
-        nHours.push(next);
-    }
-
-    return nHours;
-}
-
-export function groupMetricsOnEnv(
-    metrics: IClientMetricsEnv[],
-): GroupedClientMetrics[] {
-    const hours = generateLastNHours(24, new Date());
-    const environments = metrics.map((m) => m.environment);
-
-    const grouped = {};
-
-    hours.forEach((time) => {
-        environments.forEach((environment) => {
-            grouped[`${time}:${environment}`] = {
-                timestamp: time,
-                environment,
-                yes_count: 0,
-                no_count: 0,
-            };
-        });
-    });
-
-    metrics.forEach((m) => {
-        grouped[`${m.timestamp}:${m.environment}`].yes_count += m.yes;
-        grouped[`${m.timestamp}:${m.environment}`].no_count += m.no;
-    });
-
-    return Object.values(grouped);
-}

src/lib/types/models/metrics.ts

@@ -1,6 +1,12 @@
 export interface GroupedClientMetrics {
     environment: string;
     timestamp: Date;
-    yes_count: number;
-    no_count: number;
+    yes: number;
+    no: number;
+}
+
+export interface ToggleMetricsSummary {
+    featureName: string;
+    lastHourUsage: GroupedClientMetrics[];
+    seenApplications: string[];
 }

src/test/e2e/api/admin/client-metrics.e2e.test.ts

@@ -1,7 +1,6 @@
 import dbInit, { ITestDb } from '../../helpers/database-init';
 import { setupAppWithCustomConfig } from '../../helpers/test-helper';
 import getLogger from '../../../fixtures/no-logger';
-import { roundDownToHour } from '../../../../lib/services/client-metrics/util';
 import { IClientMetricsEnv } from '../../../../lib/types/stores/client-metrics-store-v2';
 
 let app;
@@ -22,10 +21,11 @@ afterAll(async () => {
 
 afterEach(async () => {
     await db.reset();
+    await db.stores.clientMetricsStoreV2.deleteAll();
 });
 
-test('should return grouped metrics', async () => {
-    const date = roundDownToHour(new Date());
+test('should return raw metrics, aggregated on key', async () => {
+    const date = new Date();
     const metrics: IClientMetricsEnv[] = [
         {
             featureName: 'demo',
@@ -72,24 +72,95 @@ test('should return grouped metrics', async () => {
     await db.stores.clientMetricsStoreV2.batchInsertMetrics(metrics);
 
     const { body: demo } = await app.request
-        .get('/api/admin/client-metrics/features/demo')
+        .get('/api/admin/client-metrics/features/demo/raw')
         .expect('Content-Type', /json/)
         .expect(200);
     const { body: t2 } = await app.request
-        .get('/api/admin/client-metrics/features/t2')
+        .get('/api/admin/client-metrics/features/t2/raw')
         .expect('Content-Type', /json/)
         .expect(200);
 
-    expect(demo.data).toHaveLength(48);
+    expect(demo.data).toHaveLength(2);
     expect(demo.data[0].environment).toBe('default');
-    expect(demo.data[0].yes_count).toBe(5);
-    expect(demo.data[0].no_count).toBe(4);
+    expect(demo.data[0].yes).toBe(5);
+    expect(demo.data[0].no).toBe(4);
     expect(demo.data[1].environment).toBe('test');
-    expect(demo.data[1].yes_count).toBe(1);
-    expect(demo.data[1].no_count).toBe(3);
+    expect(demo.data[1].yes).toBe(1);
+    expect(demo.data[1].no).toBe(3);
 
-    expect(t2.data).toHaveLength(24);
+    expect(t2.data).toHaveLength(1);
     expect(t2.data[0].environment).toBe('default');
-    expect(t2.data[0].yes_count).toBe(7);
-    expect(t2.data[0].no_count).toBe(104);
+    expect(t2.data[0].yes).toBe(7);
+    expect(t2.data[0].no).toBe(104);
+});
+
+test('should toggle summary', async () => {
+    const date = new Date();
+    const metrics: IClientMetricsEnv[] = [
+        {
+            featureName: 'demo',
+            appName: 'web',
+            environment: 'default',
+            timestamp: date,
+            yes: 2,
+            no: 2,
+        },
+        {
+            featureName: 't2',
+            appName: 'web',
+            environment: 'default',
+            timestamp: date,
+            yes: 5,
+            no: 5,
+        },
+        {
+            featureName: 't2',
+            appName: 'web',
+            environment: 'default',
+            timestamp: date,
+            yes: 2,
+            no: 99,
+        },
+        {
+            featureName: 'demo',
+            appName: 'web',
+            environment: 'default',
+            timestamp: date,
+            yes: 3,
+            no: 2,
+        },
+        {
+            featureName: 'demo',
+            appName: 'web',
+            environment: 'test',
+            timestamp: date,
+            yes: 1,
+            no: 3,
+        },
+        {
+            featureName: 'demo',
+            appName: 'backend-api',
+            environment: 'test',
+            timestamp: date,
+            yes: 1,
+            no: 3,
+        },
+    ];
+
+    await db.stores.clientMetricsStoreV2.batchInsertMetrics(metrics);
+
+    const { body: demo } = await app.request
+        .get('/api/admin/client-metrics/features/demo')
+        .expect('Content-Type', /json/)
+        .expect(200);
+
+    expect(demo.featureName).toBe('demo');
+    expect(demo.lastHourUsage).toHaveLength(2);
+    expect(demo.lastHourUsage[0].environment).toBe('default');
+    expect(demo.lastHourUsage[0].yes).toBe(5);
+    expect(demo.lastHourUsage[0].no).toBe(4);
+    expect(demo.lastHourUsage[1].environment).toBe('test');
+    expect(demo.lastHourUsage[1].yes).toBe(2);
+    expect(demo.lastHourUsage[1].no).toBe(6);
+    expect(demo.seenApplications).toStrictEqual(['backend-api', 'web']);
 });