tbattery

#!/bin/bash
# (c) 2020 Leif Sawyer
# License: GPL 3.0 (see https://github.com/akhepcat/)
# Permanent home:  https://github.com/akhepcat/Miscellaneous/
# Direct download: https://raw.githubusercontent.com/akhepcat/Miscellaneous/master/tbattery
# 
WIDTH=100
COLUMNS=${COLUMNS:-$(tput cols)}

if [ $COLUMNS -gt ${WIDTH} ]
then
	scale=1
elif [ $COLUMNS -gt $(( $WIDTH / 2 )) ]
then
	scale=2
else
	scale=4
fi

if [ -e /sys/class/power_supply/BAT0/charge_now ]
then
	CHARGE=charge
elif [ -e /sys/class/power_supply/BAT0/energy_now ]
then
	CHARGE=energy
else
	echo "No battery found"
	exit 1
fi

now=$(cat /sys/class/power_supply/BAT0/${CHARGE}_now)
full=$(cat /sys/class/power_supply/BAT0/${CHARGE}_full)
charging=$(grep -i '^charging' /sys/class/power_supply/BAT0/status)
spark=$'\xE2\x8C\x81'

BATP=$(echo "scale = 2; print ( $now / $full ) * 100" | bc)
BATP=$(echo "($BATP + .5) /1" | bc)
#echo battery=$BATP

PADL=$(( ($WIDTH / $scale) - ( (100 - $BATP) / $scale ) - 2))
PADR=$(( ($WIDTH / $scale) - $PADL - 1 ))

fcolor="\e[0m\e[100m"

[[ ${BATP} -gt 98 ]] && fcolor="\e[0m"

if [ ${BATP} -gt 70 ]
then
	# green
	color="\e[0m\e[1m\e[92m"
	ecolor="\e[0m\e[42m"
elif [ ${BATP} -gt 40 ]
then
	# yellow
	color="\e[0m\e[1m\e[93m"
	ecolor="\e[0m\e[43m"
elif [ ${BATP} -gt 20 ]
then
	# magenta
	color="\e[0m\e[1m\e[91m"
	ecolor="\e[0m\e[1m\e[45m"
else
	# red
	color="\e[0m\e[1m\e[91m"
	ecolor="\e[0m\e[1m\e[101m"
fi

if [ -n "${charging}" ]
then
	BATP=${spark}${BATP}${spark}
fi
printf "%bE%${PADL}s%b%b%${PADR}s\e[0m\e[1mF\e[0m    \n"  "${ecolor}"   " "   "${color}${BATP}"   "${fcolor}"    " "