sh: battery status for tmux

battery_status.sh

#!/usr/bin/env bash

bstat=( $(pmset -g batt | grep -Eo '[0-9]+%.*' | awk '{print($1,$2)}' | tr -d ";") )

percentage=$(echo "${bstat[0]}" | tr -d "%")

case $((
    (percentage >= 0 && percentage < 25) ? 1 :
    (percentage >= 25 && percentage < 50) ? 2 :
    (percentage >= 50 && percentage < 75) ? 3 :
    (percentage >= 75 && percentage <= 100) ? 4 : 0
    )) in
    1)
        color='red'
        ;;
    2)
        color='orange'
        ;;
    3)
        color='yellow'
        ;;
    4)
        color='green'
        ;;
    0)
        color='default'
        ;;
esac

case ${bstat[1]} in
    charging)
        indicator=""
        ;;
    discharging)
        indicator=""
        ;;
    AC)
        indicator="ﮣ"
        ;;
esac

echo "#[fg=${color}]${indicator} ${bstat[0]}"