#!/usr/bin/env sh

######################################################################
# @author      : swytch
# @file        : kbacklight
# @license     : GPLv3
# @created     : Wednesday May 20, 2020 18:17:03 CEST
#
# @description : control keyboard brightness
# @dependencies: upower
######################################################################


max=$(cat /sys/class/leds/tpacpi::kbd_backlight/max_brightness)
current=$(cat /sys/class/leds/tpacpi::kbd_backlight/brightness)
new=$(expr $current + 1)

setKeyboardLight () {
    dbus-send --system --type=method_call  --dest="org.freedesktop.UPower" "/org/freedesktop/UPower/KbdBacklight" "org.freedesktop.UPower.KbdBacklight.SetBrightness" int32:$1
}

[ $new -gt $max ] && new=0

setKeyboardLight $new