From 028a3702996273b4983c94fb24985d43c53ab3f6 Mon Sep 17 00:00:00 2001
From: Satria <admin@satr14.my.id>
Date: Fri, 20 Mar 2026 06:49:51 +0700
Subject: [PATCH] battery notifier

---
 modules/hardware/misc/battery-power.nix | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/modules/hardware/misc/battery-power.nix b/modules/hardware/misc/battery-power.nix
index bd8ee20..a8dbc96 100644
--- a/modules/hardware/misc/battery-power.nix
+++ b/modules/hardware/misc/battery-power.nix
@@ -1,4 +1,4 @@
-{ pkgs, resume-dev, ... }: {
+{ pkgs, username, resume-dev, ... }: {
   powerManagement.powertop.enable = true;
 
   services = {
@@ -10,6 +10,18 @@
         echo 85 > /sys/class/power_supply/BAT*/charge_control_end_threshold || true
       ''}"
     '';
+    cron = {
+      enable = true;
+      systemCronJobs = [
+        "* * * * * ${username} bash -x ${pkgs.writeShellScript "low-battery-notifier" ''
+          BAT_PCT=`${pkgs.acpi}/bin/acpi -b | ${pkgs.gnugrep}/bin/grep -P -o '[0-9]+(?=%)'`
+          BAT_STA=`${pkgs.acpi}/bin/acpi -b | ${pkgs.gnugrep}/bin/grep -P -o '\w+(?=,)'`
+          echo "`date` battery status:$BAT_STA percentage:$BAT_PCT"
+          test $BAT_PCT -le 30 && test $BAT_PCT -gt 15 && test $BAT_STA = "Discharging" && DISPLAY=:0.0 ${pkgs.libnotify}/bin/notify-send -c device -u normal   "Low Battery" "\$\{BAT_PCT}% remaining."
+          test $BAT_PCT -le 15                         && test $BAT_STA = "Discharging" && DISPLAY=:0.0 ${pkgs.libnotify}/bin/notify-send -c device -u critical "Low Battery" "Shutdown at 10%."
+        ''} > /tmp/cron.batt.log 2>&1"
+      ];
+    };
     upower = {
       enable = true;
       percentageCritical = 15;