#! /bin/bash
BELOWFILE=/tmp/batblo
ABOVEFILE=/tmp/batabo
MIN=40
MAX=80

notify-send-all(){
    for p in $(pgrep gconf-helper); do
        dbus=$(grep -z DBUS_SESSION_BUS_ADDRESS /proc/$p/environ | sed 's/DBUS_SESSION_BUS_ADDRESS=//')
        user=$(grep -m 1 -z USER /proc/$p/environ | sed 's/USER=//')
        dply=$(grep -z DISPLAY /proc/$p/environ | sed 's/DISPLAY=//')
        sudo -u $user sh -c "DBUS_SESSION_BUS_ADDRESS=\"$dbus\" DISPLAY=\"$dply\" notify-send $@"
    done
}

if [ `acpi|grep -Po "[0-9]+(?=%)"` -le $MIN ]; then
    if [ ! -f $BELOWFILE ]; then
        notify-send-all "-i battery \"Battery at $MIN%\" \"Do you want to plug it in?\""
        touch $BELOWFILE
        rm $ABOVEFILE 2>/dev/null
    fi
elif [ `acpi|grep -Po "[0-9]+(?=%)"` -ge $MAX ]; then
    if [ ! -f $ABOVEFILE ]; then
        notify-send-all "-i battery \"Battery at $MAX%\" \"Do you want to unplug it?\""
        rm $BELOWFILE 2>/dev/null
        touch $ABOVEFILE
    fi
else
    rm $BELOWFILE $ABOVEFILE 2>/dev/null
fi