From a2db7b46d644d6d327c480da6092695b76d41313 Mon Sep 17 00:00:00 2001
From: Alex Holliday <ajhollid@gmail.com>
Date: Thu, 18 Dec 2025 19:20:06 +0000
Subject: [PATCH] date trunc

---
 server/src/services/business/MonitorService.ts | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/server/src/services/business/MonitorService.ts b/server/src/services/business/MonitorService.ts
index e66416e07..32d648cd1 100644
--- a/server/src/services/business/MonitorService.ts
+++ b/server/src/services/business/MonitorService.ts
@@ -257,9 +257,9 @@ class MonitorService implements IMonitorService {
 
   // getDateFormat removed — only 2h (raw checks) remains, using minute buckets inline
 
-  private getBaseGroup = (dateFormat: string): Record<string, any> => {
+  private getBaseGroup = (_dateFormat: string): Record<string, any> => {
     return {
-      _id: { $dateToString: { format: dateFormat, date: "$createdAt" } },
+      _id: { $dateTrunc: { date: "$createdAt", unit: "minute" } },
       count: { $sum: 1 },
       avgResponseTime: { $avg: "$responseTime" },
     };
@@ -269,9 +269,9 @@ class MonitorService implements IMonitorService {
     return { status: 1, responseTime: 1, createdAt: 1 };
   };
 
-  private getPageSpeedGroup = (dateFormat: string): Record<string, any> => {
+  private getPageSpeedGroup = (_dateFormat: string): Record<string, any> => {
     return {
-      _id: { $dateToString: { format: dateFormat, date: "$createdAt" } },
+      _id: { $dateTrunc: { date: "$createdAt", unit: "minute" } },
       count: { $sum: 1 },
       avgResponseTime: { $avg: "$responseTime" },
       accessibility: { $avg: "$lighthouse.accessibility" },
@@ -300,9 +300,9 @@ class MonitorService implements IMonitorService {
     return projectStage;
   };
 
-  private getInfraGroup = (dateFormat: string): Record<string, any> => {
+  private getInfraGroup = (_dateFormat: string): Record<string, any> => {
     return {
-      _id: { $dateToString: { format: dateFormat, date: "$createdAt" } },
+      _id: { $dateTrunc: { date: "$createdAt", unit: "minute" } },
       count: { $sum: 1 },
       avgResponseTime: { $avg: "$responseTime" },
       physicalCores: { $last: "$system.cpu.physical_core" },