Bash script to determine xinput number of touchpad (which changes!) and disable/enable

touchpad.sh

#!/bin/bash

pad_name=$(xinput list --name-only | grep TouchPad)
id=$(xinput list --id-only "$pad_name")

case "$1" in
		[Oo][Nn]*) xinput set-prop $id "Device Enabled" 1
		;;
		[Oo][Ff]*) xinput set-prop $id "Device Enabled" 0
		;;
		*)
		echo "Touchpad name is $pad_name"
		echo "Touchpad id is $id"
		;;
esac