helm/profiles/desktop/battery-low-timer.nix

{ pkgs, ... }:

{
  systemd.services.battery-low = {
    serviceConfig.Type = "simple";
    path = [
      pkgs.acpi
    ];
    startAt = "*08:00:00";
    script = ''
      #!/usr/bin/env bash
      if [ `acpi -b | grep "Battery 0" | awk ' { print ($3)}'`  == "Discharging," ] ; then
          # Discharging
          # Monitor for low battery
          if [ `acpi -b | grep "Battery 0" | awk ' { print ($4)-0}'`  -le "15" ] ; then
              notify-send -u critical "Battery Low";
          fi
      else
          # Charging
          if [ `acpi -b | grep "Battery 0" | awk ' { print ($4)-0}'`  -ge "94" ] ; then
              # Fully charged
              notify-send "Battery Full"
          fi
      fi
    '';
    serviceConfig = {
      User = "anish";
    };
  };
  systemd.timers.battery-low = {
    wantedBy = [ "timers.target" ];
    partOf = [ "battery-low.service" ];
    timerConfig.OnCalendar = [ "*:0/5" ];
  };
}