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#!/bin/bash
last="NONE"
nid=0
low=10
critical=5
polltime=2
bat="BAT1"
str_time () {
h=$(bc <<< "${1}/3600")
m=$(bc <<< "(${1}%3600)/60")
s=$(bc <<< "${1}%60")
printf "%d h %02d min %02.0f sec\n" $h $m $s
}
calc_time_left () {
voltage_now=$(cat "$1/voltage_now")
charge_now=$(cat "$1/charge_now")
current_now=$(cat "$1/current_now")
energy=$(bc -l <<< "($voltage_now * $charge_now) / 1000000")
power=$(bc -l <<< "($voltage_now * $current_now) / 1000000")
hours=$(bc -l <<< "$energy / $power")
echo $(bc -l <<< "$hours * 3600")
}
dismiss_last_notification () {
if [[ "$nid" -ne "0" ]]; then
echo "poof"
notify-send -r $nid -t 1 " "
nid=0
fi
}
send_power_warning () {
time_left=$(str_time $(calc_time_left $2))
if [[ "$nid" -ne "0" ]]; then
nid=$(notify-send -p -r $nid -u critical -t 0 "Power" "Battery $1: $3%\nRemaining: $time_left")
else
nid=$(notify-send -p -u critical -t 0 "Power" "Battery $1: $3%\nRemaining: $time_left")
fi
}
while true; do
battery="/sys/class/power_supply/$bat"
if [ -d $battery ]; then
capacity=$(cat $battery/capacity)
status=$(cat $battery/status)
if [ "$last" != "FULL" ] && [ "$status" = "Full" ]; then
dismiss_last_notification
notify-send "Power" "Battery is full"
last="FULL"
fi
# If low and discharging
if [ "$last" != "CRITICAL" ] && [ "$status" = "Discharging" ] && [ $capacity -le $low ]; then
send_power_warning "warning" $battery $capacity
last=LOW polltime=2
fi
# If critical and discharging
if [ "$status" = "Discharging" ] && [ $capacity -le $critical ]; then
send_power_warning "critical" $battery $capacity
last=CRITICAL
polltime=2
fi
# If charging
if [ "$status" = "Charging" ] && [ "$last" != "CHARGING" ]; then
dismiss_last_notification
notify-send "Power" "Battery charging: $capacity%"
last=CHARGING
polltime=2
fi
# If disharging
if [ "$status" = "Discharging" ] && [ "$last" != "LOW" ] && [ "$last" != "CRITICAL" ] && [ "$last" != "DISCHARGING" ]; then
time_left=$(str_time $(calc_time_left $battery))
notify-send "Power" "Battery discharging: $capacity%"
last=DISCHARGING
polltime=2
fi
else
sleep 60
fi
sleep $polltime
done
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