#!/bin/sh
# This script sends notifications when battery is low,
# but only while discharging.

battery=$(upower -e | grep BAT | head -n 1)

percentage=$(upower -i "$battery" |
	awk '/percentage/ {gsub(/%/, "", $2); print $2}')

state=$(upower -i "$battery" |
	awk '/state/ {print $2}')

# Only notify if the battery is discharging
if [ "$state" != "discharging" ]; then
	exit 0
fi

if [ "$percentage" -le 5 ]; then
	notify-send "Battery very low."
elif [ "$percentage" -le 15 ]; then
	notify-send "Battery low."
fi