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#!/bin/bash
# Check for dependencies
for comm in upower awk; do
command -v upower >/dev/null 2>&1 || (echo "Error, missing command dependencies: $comm" && exit)
done
# Prepare battery informatoin
for bat in BAT0 BAT1; do
upower -i "/org/freedesktop/UPower/devices/battery_$bat" > "/tmp/$bat"
[ "$(awk '/native-path/{print $2}' "/tmp/$bat")" = '(null)' ] && continue
bat_state="$(awk '/state/{print substr($2, 1, 1)}' "/tmp/$bat")"
if [ $bat_state = 'c' ]; then bat_power_ind=''
elif [ $bat_state = 'd' ]; then bat_power_ind=''
else bat_power_ind=''
fi
bat_per="$(awk '/percentage/{print strtonum($2)}' "/tmp/$bat")"
# bat_per=$((bat_per * 5 / 4 - 25)) # compensation for failing battery
[ $bat_state = 'd' ] \
&& bat_time="$(awk '/time to empty/{print $4 substr($5, 1, 1)}' "/tmp/$bat")" \
|| bat_time="$(awk '/time to full/ {print $4 substr($5, 1, 1)}' "/tmp/$bat")"
echo -n " $bat_power_ind ${bat_per}% $bat_time"
#
# Notifications
#
command -v notify-send >/dev/null 2>&1 || exit
[ ! -e "/tmp/bat_notif$bat" ] && touch "/tmp/bat_notif$bat"
bat_notif="$(cat "/tmp/bat_notif$bat")"
# Notify when battery is charged to 80%
if [ $bat_state = 'c' ]; then
if [ "$bat_notif" != 80 ] && [ $bat_per -ge 80 ]; then
notify-send -u normal -i battery-charging -t 999999 "$bat at 80%"
echo 80 > "/tmp/bat_notif$bat"
fi
# Notify when battery discharges to 5%, 10%, 15% and 20%
elif [ $bat_state = 'd' ]; then
for per in 5 10 15 20; do
if [ "$bat_notif" = $per ]; then
break
elif [ $bat_per -le $per ]; then
notify-send -u critical -i battery-low -t 999999 "$bat at ${per}%"
echo $per > "/tmp/bat_notif$bat"
break
fi
done
# Notify when battery is full
else
if [ "$bat_notif" != 100 ]; then
notify-send -u normal -i battery-full -t 999999 "$bat fully charged!"
echo 100 > "/tmp/bat_notif$bat"
fi
fi
done
echo
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