#!/bin/bash
#
# Print current battery status.  Can be used in genmon xfce plugin.

print_sepparator=false

print_status() {
    [ $print_sepparator = true ] && printf ' '

    case "$status" in
        "Full")
            return;;
        "Discharging")
            status="-";;
        "Charging")
            status="+";;
        "Unknown")
            # Probably rich the threshold
            if [ $(echo "$current_charge > 50" | bc -l) == 1 ] ; then
                return
            fi
            status="?"
            ;;
        *)
            status="?";;
    esac

    printf '%s %.0f%s' $(basename $bat)  $current_charge "$status"

    print_sepparator=true
}

for bat in /sys/class/power_supply/BAT? ; do
    status=$(cat "$bat/status")
    energy_full=$(cat "$bat/energy_full")
    energy_now=$(cat "$bat/energy_now")
    current_charge=$(bc <<< "scale=2; $energy_now / $energy_full * 100")

    print_status
done
echo