Current state

src/app/api/system/monitor/route.ts

@@ -0,0 +1,36 @@
+import { NextResponse } from "next/server"
+import os from "os"
+import { getSessionUser } from "@/lib/auth"
+
+let prevCpu = process.cpuUsage()
+let prevTime = Date.now()
+
+export async function GET() {
+  const sessionUser = await getSessionUser()
+  if (!sessionUser) return NextResponse.json({ error: "Unauthorized" }, { status: 401 })
+  if (sessionUser.role !== "admin" && sessionUser.role !== "super_admin") {
+    return NextResponse.json({ error: "Forbidden" }, { status: 403 })
+  }
+
+  const now = Date.now()
+  const elapsed = now - prevTime
+  const currentCpu = process.cpuUsage()
+
+  const user = currentCpu.user - prevCpu.user
+  const sys = currentCpu.system - prevCpu.system
+  const totalUs = user + sys
+
+  // CPU time (ms) / wall time (ms) * 100 = % of one core
+  const cpuPct = elapsed > 0 ? Math.round((totalUs / 1000) / elapsed * 100 * 10) / 10 : 0
+
+  prevCpu = currentCpu
+  prevTime = now
+
+  const mem = process.memoryUsage()
+
+  return NextResponse.json({
+    rssMB: Math.round(mem.rss / 1024 / 1024),
+    cpuPct,
+    cores: os.cpus().length,
+  })
+}