#!/usr/bin/php
<?php
define("EOL", "\n");

$title = "PresenceDaemon";
cli_set_process_title($title);
file_put_contents("/proc/".getmypid()."/comm",$title);
declare(ticks = 1);

require "/etc/moha/liste_telephones.php";

$msg = "";
$result = array();
$presence = array();
$curlErr = 0;
$command = "sudo nmap -n -sP 192.168.1.*";		//need to configure /etc/sudo/sudoers to permit execution of nmap as superuser
echo "presenceDaemon is starting\n";

while (1)
{
	//echo "presenceDaemon is testing\n";
	$msg = "";
	exec($command, $result);

	foreach ($macAddresses as $name =>$value)
	{
		if (!array_key_exists($name, $presence))
		{
			$presence[] = $name;
			$presence[$name] = false;
		}
		$r = search($value, $result);

		if ($r === true)
		{
			echo "présent\n";
			if ($presence[$name] === false)
			{
				$presence[$name] = true;
				$msg .= "nom=" . $name . _("&presence=true");
				send($msg);
				echo $name . " est mis présent dans tableau\n";
			}
		}elseif ($presence[$name] === true)
		{
			$presence[$name] = false;
			echo $name . " est mis absent dans tableau\n";
			$msg .= "nom=" . $name . _("&presence=false");
			send($msg);
		}
	}

	sleep(1);
}

function search($needle, $array)
{
	foreach ($array as $string)
	{
		if (str_contains($string, $needle))
		{
			echo "found\n";
			return true;
		}
	}
	return false;
}

function send($msg)
{
	global $curlErr;
	$ch = curl_init();

	$msg = "http://localhost:1025/present&" . $msg;
	// set url
	curl_setopt($ch, CURLOPT_URL, $msg );

	// return the transfer as a string
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	// $result contains the output string
			echo  _("Curl sending message -") . __FILE__ . ":" . __LINE__ . EOL;

	if ($curlErr <= 5)
	{
		echo $msg . EOL;
		curl_exec($ch);
		if (curl_errno($ch) != 0)
		{
			$curlErr += 1;
			echo sprintf( _("Sleeping 1 minute because Curl return error  %d: %s when sending notification - "), curl_errno($ch), curl_error($ch)) . __FILE__ . ":" . __LINE__ . EOL;
			sleep (60);
		}else
		{
			echo _("Curl return no error - ") . __FILE__ . ":" . __LINE__ . EOL;
			$curlErr = 0;
		}
	}
}

?>