cfg/.config/i3blocks/battery

#!/bin/bash
set -euo pipefail

# Check no support for battery (likely desktop PC)
acpi -b |& grep -q 'No support' && {
	printf '\uf0e7\n'
	exit 0
} || true

IFS=$'\n'

ac_conn=0
(acpi -a | grep -q on-line) && ac_conn=1

bat_cap=()
for line in $(acpi -b | grep -v 'unavailable' | sed -E 's/.*: ([^,]+), ([0-9]+)%(, ([0-9]+:[0-9]+|)|).*/\1\t\2\t\4/'); do
	color='#ffffff'

	state=$(echo "${line}" | cut -d $'\t' -f 1)
	cap=$(echo "${line}" | cut -d $'\t' -f 2)
	remain="($(echo "${line}" | cut -d $'\t' -f 3)) "

	[[ ${state} == 'Full' ]] && remain=''
	[[ ${remain} == '() ' ]] && remain='(??) '

	[ ${cap} -lt 50 ] && color='#ffd966'
	[ ${cap} -lt 25 ] && color='#dd0000'

	bat_cap+=("<span color=\"${color}\">${cap}% ${remain}</span>")
done

IFS=' '

if [ ${ac_conn} -eq 0 ]; then
	# PS not connected, on battery
	printf '\uf241 %s\n' "${bat_cap[*]}"
else
	# PS connected, on AC
	printf '\uf376 %s\n' "${bat_cap[*]}"
fi