#!/usr/bin/sh

# js-set-enum-leds: Set gamepad enumerator LEDS to match the js device number.

# Copyright © 2014 bri <bri@abrij.org>
# Copyright © 2018 hzulla <kontakt@hanno.de>

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.


# If the set_gamepad_leds function provided for convenience is to be used
# for a particular type of gamepad, the udev rule should provide the following
# positional parameters.  See /lib/udev/rules.d/60-joystick for examples.

# The LED indicator type of this device, possible values right now are:
# FOUR
#  a bar of four LEDs labeled 1, 2, 3, 4
#  which can be controlled individually
#  e.g. used by PS3 sixaxis gamepads, the Nintendo Wii controllers
# XBOX
#  a ring of four LEDs labeled 1, 2, 3, 4
#  which cannot be controlled individually
#  e.g. used by XBox gamepads
# COLOR
#  a single multicolor LED
#  e.g. used by PS4 Dualshock 4 gamepad
DEVICETYPE=$1

# A partial path string containing the common part of the names of affected
# led-class sysfs directories.
LEDGLOB=$2

# The number of the js device.  These start at 0 but enumerator LEDs are
# 1-based. (Having at least one LED on lets user see controller is on.)
JSNUM=$3

set_gamepad_leds() {
	for led in "$LEDGLOB"*; do
		if [ -d $led ] && [ -w $led/brightness ] && [ "$1" ]; then
			echo $1 > $led/brightness
			shift 1
	        else
			echo "set_gamepad_leds: wrong number of leds or values" 1>&2
			exit -1
		fi
	done
}

set_multicolor_led() {
	for led in "$LEDGLOB"*red "$LEDGLOB"*green "$LEDGLOB"*blue; do
		if [ -d $led ] && [ -w $led/brightness ] && [ "$1" ]; then
			echo $1 > $led/brightness
			shift 1
	        else
			echo "set_multicolor_led: wrong number of leds or values" 1>&2
			exit -1
		fi
	done
}

case $DEVICETYPE in
	FOUR)
		# see sixaxis_set_leds_from_id()
		# in linux/drivers/hid/hid-sony.c
		case $((JSNUM % 10)) in
			0) set_gamepad_leds 1 0 0 0;;
			1) set_gamepad_leds 0 1 0 0;;
			2) set_gamepad_leds 0 0 1 0;;
			3) set_gamepad_leds 0 0 0 1;;
			4) set_gamepad_leds 1 0 0 1;;
			5) set_gamepad_leds 0 1 0 1;;
			6) set_gamepad_leds 0 0 1 1;;
			7) set_gamepad_leds 1 0 1 1;;
			8) set_gamepad_leds 0 1 1 1;;
			9) set_gamepad_leds 1 1 1 1;;
		esac
		;;
	XBOX)
		# see xpad_send_led_command()
		# in linux/drivers/input/joystick/xpad.c
		case $((JSNUM % 4)) in
			0) set_gamepad_leds 6;;
			1) set_gamepad_leds 7;;
			2) set_gamepad_leds 8;;
			3) set_gamepad_leds 9;;
		esac
		;;
	COLOR)
		# see dualshock4_set_leds_from_id()
		# in linux/drivers/hid/hid-sony.c
		case $((JSNUM % 7)) in
			0) set_multicolor_led 0 0 64;;	# blue
			1) set_multicolor_led 64 0 0;;	# red
			2) set_multicolor_led 0 64 0;;	# green
			3) set_multicolor_led 32 0 32;;	# pink
			4) set_multicolor_led 64 32 0;;	# orange
			5) set_multicolor_led 0 32 32;;	# teal
			6) set_multicolor_led 32 32 32;;# white
		esac
		;;
	*) echo "called with no matching model" 1>&2
esac