From 3f47646a17a385c2894460b711eaba1484e3c932 Mon Sep 17 00:00:00 2001
From: Aaron van Meerten <aaron.van.meerten@8x8.com>
Date: Tue, 26 Sep 2023 11:48:47 -0500
Subject: [PATCH] feature: endpoint to expose group metrics

---
 src/app.ts      |  8 ++++++++
 src/handlers.ts | 26 ++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/src/app.ts b/src/app.ts
index bcc51f7..54d4639 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -467,6 +467,14 @@ app.get('/groups/:name/instance-audit', async (req, res, next) => {
     }
 });
 
+app.get('/groups/:name/group-metrics', async (req, res, next) => {
+    try {
+        await h.getGroupMetrics(req, res);
+    } catch (err) {
+        next(err);
+    }
+});
+
 app.get('/groups/:name/group-audit', async (req, res, next) => {
     try {
         await h.getGroupAudit(req, res);
diff --git a/src/handlers.ts b/src/handlers.ts
index c38f70b..fde082f 100644
--- a/src/handlers.ts
+++ b/src/handlers.ts
@@ -417,6 +417,32 @@ class Handlers {
         res.send({ audit });
     }
 
+    async getGroupMetrics(req: Request, res: Response): Promise<void> {
+        const groupName = req.params.name;
+        const ctx = req.context;
+        const group = await this.instanceGroupManager.getInstanceGroup(groupName);
+
+        if (!group) {
+            res.sendStatus(404);
+            return;
+        }
+
+        const maxPeriodCount = Math.max(
+            group.scalingOptions.scaleUpPeriodsCount,
+            group.scalingOptions.scaleDownPeriodsCount,
+        );
+
+        const metrics = await this.instanceTracker.getMetricInventoryPerPeriod(
+            ctx,
+            groupName,
+            maxPeriodCount,
+            group.scalingOptions.scalePeriod,
+        );
+
+        res.status(200);
+        res.send({ metrics });
+    }
+
     async resetInstanceGroups(req: Request, res: Response): Promise<void> {
         req.context.logger.info('Resetting instance groups');
         const ctx = req.context;