scripts/waybar/waybar-battery.sh

#!/bin/bash

ACPI=$(acpi -b)
STATUS=$(echo $ACPI | cut -d':' -f2 | sed 's/^\s\([^,]*\),.*/\1/')
LEVEL=$(echo $ACPI | cut -d',' -f2 | sed 's/\s//g' | sed 's/%$//')
TIME=$(echo $ACPI | cut -d',' -f3 | sed 's/\s//')
CLASS="unknown"
if [[ -z $1 ]]; then
	echo "$STATUS $LEVEL ($TIME)"
elif [[ $1 == bar ]]; then
	case "$STATUS" in
	"Discharging")
		CLASS="discharging"
		case "$LEVEL" in
		[8-9][0-9])
			STATUS=" "
			;;
		[6-7][0-9])
			STATUS=" "
			;;
		[4-5][0-9])
			STATUS=" "
			;;
		[2-3][0-9])
			STATUS=" "
			;;
		1[0-9])
			CLASS="low"
			STATUS=" "
			;;
		[1-9])
			CLASS="critical"
			STATUS=" "
			;;
		*)
			STATUS="? "
			;;
		esac
		;;
	"Full")
		CLASS="ac"
		STATUS=" "
		;;
	"Charging")
		CLASS="charging"
		STATUS="🗲"
		;;
	*)
		STATUS="✘"
		;;
	esac
	printf '{"text":"%b%%","icon":"%b ","percentage":"%b","tooltip":"%b","class":"%b"}' "${STATUS}${LEVEL}" $STATUS $LEVEL "$TIME" $CLASS
	exit
elif [[ $1 == 'notify' ]]; then
	notify-send Battery "$(echo $ACPI | cut -d':' -f2- | sed 's/\s//')"
else
	echo "invalid option $1"
fi