<?php
/*
 * led.inc
 *
 * part of pfSense (https://www.pfsense.org)
 * Copyright (c) 2009-2018 Rubicon Communications, LLC (Netgate)
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

$led_root = "/dev/led/led";

/*
 * Send the control string to an LED
 */
function led_ctl($led, $str) {
	global $led_root;
	if (led_exists($led)) {
		exec("/bin/echo " . escapeshellarg($str) . " > {$led_root}{$led}");
		return true;
	}
	return false;
}

/*
 * Blink an LED at set speed from 1-9 (1=Very Fast, 9=Very Slow)
 */
function led_blink($led, $speed = 0) {
	switch ($speed) {
		case "reallyfast":
		case "veryfast":
			$speed = 1;
			break;
		case "fast":
			$speed = 3;
			break;
		case "medium":
			$speed = 5;
			break;
		case "slow":
			$speed = 7;
			break;
		case "reallyslow":
		case "veryslow":
			$speed = 9;
			break;
	}
	if (is_numeric($speed) && ($speed > 0) && ($speed < 10)) {
		return led_ctl($led, "f{$speed}");
	}
	return false;
}

/*
 * Blink an LED in a specific pattern
 * Letters A-J are on from 1/10s to 1s
 * Letters a-j are off from 1/10s to 1s
 */
function led_pattern($led, $pattern, $repeat = true) {
	/*  End with a . to stop after one iteration. */
	$end = $repeat ? "" : ".";
	return led_ctl($led, "s{$pattern}{$end}");
}

/*
 * Encode a text message into morse code, and send it to an LED
 */
function led_morse($led, $message) {
	return led_ctl($led, "m" . str_to_morse($message));
}

/*
 * Blink digits out on LED at 1/10s intervals
 * e.g 1=1 blink, 8=8 blinks
 * 0 is 10 pulses.
 * One second pause between digits.
 */
function led_digit($led, $digitstring) {
	$i = 0;
	$dstring = "d";
	while ($i < strlen($digitstring)) {
		$thisdigit = substr($digitstring, $i++, 1);
		if (is_numeric($thisdigit)) {
			$dstring .= $thisdigit;
		}
	}
	led_ctl($led, $dstring);
}

/*
 * Turn an LED on
 */
function led_on($led) {
	led_ctl($led, "1");
}

/*
 * Turn an LED off
 */
function led_off($led) {
	led_ctl($led, "0");
}

/*
 * Find the number of LEDs present on the system.
 */
function led_count() {
	global $led_root;
	$count = 0;
	$leds = array();
	if (is_dir(dirname($led_root))) {
		$leds = glob("{$led_root}*");
		$count = count($leds);
	}
	return $count;
}

/*
 * Test to see if a given LED exists.
 */
function led_exists($led) {
	global $led_root;
	if (!is_numeric($led)) {
		return false;
	}
	return file_exists("{$led_root}{$led}");
}

/*
 * Sweep across three LEDs in a K.I.T.T.-like way.
 */
function led_kitt() {
	led_pattern(1, 'AaaaaA');
	led_pattern(2, 'aAaaAa');
	led_pattern(3, 'aaAAaa');
}

/*
 * Custom pattern for assigning interfaces
 */
function led_assigninterfaces() {
	led_pattern(1, 'AaaAaaaaaaaaaaaa');
	led_pattern(2, 'aaaaaAaaAaaaaaaa');
	led_pattern(3, 'aaaaaaaaaaAaaAaa');
}

/*
 * Return the three LEDs to a standard setup (1=on, 2 and 3 = off)
 */
function led_normalize() {
	led_on(1);
	led_off(2);
	led_off(3);
}

/*
 * Shut off ALL LEDs.
 */
function led_alloff() {
	led_off(1);
	led_off(2);
	led_off(3);
}

/*
 * Translate a string to morse code. Characters not known to have a
 * valid morse code representation will be ignored.
 */
function str_to_morse($string) {
	$i = 0;
	$morsestring = "";
	while ($i < strlen($string)) {
		$morsestring .= char_to_morse(substr($string, $i++, 1)) . " ";
	}
	return $morsestring . "\n";
}

/*
 * Translate a single character to morse code. Characters not known
 * to have a valid morse code representation will be ignored.
 */
function char_to_morse($char) {
	switch (strtoupper($char)) {
		case "A":
			return ".-";
			break;
		case "B":
			return "-...";
			break;
		case "C":
			return "-.-.";
			break;
		case "D":
			return "-..";
			break;
		case "E":
			return ".";
			break;
		case "F":
			return "..-.";
			break;
		case "G":
			return "--.";
			break;
		case "H":
			return "....";
			break;
		case "I":
			return "..";
			break;
		case "J":
			return ".---";
			break;
		case "K":
			return "-.-";
			break;
		case "L":
			return ".-..";
			break;
		case "M":
			return "--";
			break;
		case "N":
			return "-.";
			break;
		case "O":
			return "---";
			break;
		case "P":
			return ".--.";
			break;
		case "Q":
			return "--.-";
			break;
		case "R":
			return ".-.";
			break;
		case "S":
			return "...";
			break;
		case "T":
			return "-";
			break;
		case "U":
			return "..-";
			break;
		case "V":
			return "...-";
			break;
		case "W":
			return ".--";
			break;
		case "X":
			return "-..-";
			break;
		case "Y":
			return "-.--";
			break;
		case "Z":
			return "--..";
			break;
		case "0":
			return "-----";
			break;
		case "1":
			return ".----";
			break;
		case "2":
			return "..---";
			break;
		case "3":
			return "...--";
			break;
		case "4":
			return "....-";
			break;
		case "5":
			return ".....";
			break;
		case "6":
			return "-....";
			break;
		case "7":
			return "--...";
			break;
		case "8":
			return "---..";
			break;
		case "9":
			return "----.";
			break;
		case ".":
			return ".-.-.-";
			break;
		case ",":
			return "--..--";
			break;
		case "?":
			return "..--..";
			break;
		case "'":
			return ".----.";
			break;
		case "!":
			return "-.-.--";
			break;
		case "/":
			return "-..-.";
			break;
		case "(":
			return "-.--.";
			break;
		case ")":
			return "-.--.-";
			break;
		case "&":
			return ".-...";
			break;
		case ":":
			return "---...";
			break;
		case ";":
			return "-.-.-.";
			break;
		case "=":
			return "-...-";
			break;
		case "+":
			return ".-.-.";
			break;
		case "-":
			return "-....-";
			break;
		case "_":
			return "..--.-";
			break;
		case "$":
			return "...-..-";
			break;
		case "@":
			return ".--.-.";
			break;
		case '"':
			return ".-..-.";
			break;
		default:
			return "";
			break;
	}
}

?>
