#!/usr/bin/env zsh
STATUSFILE="/run/user/${UID}/touchpad_disabled"
DEVNAME='ETPS/2 Elantech Touchpad'

(($#)) || [[ ! -r $STATUSFILE ]]

case $? in
    (1|'on') toggle='enable' flag_action=('rm' '-f');;
    (0|'off') toggle='disable' flag_action=('touch');;
    (*) return 1;;
esac
notification_msg="Touchpad ${toggle}d"
xinput $toggle $DEVNAME
$flag_action[@] $STATUSFILE
notify-send $notification_msg