#!/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";
// init du tableau des présences à -1
foreach($macAddresses as $nom => $mac)
{
	$presence[$nom] = -1;
}

while (1)
{
	$presenceTemp = array();
	exec($command, $result);

	foreach ($result as $value)
	{
		//echo $value;
		if (str_contains($value, "MAC Address:"))
		{
			//echo " contient une adresse MAC" . EOL;
			search($value);
		}
	}
	foreach($presenceTemp as $nom => $status)
	{
		$msg = "";
		if ($presence[$nom] != (int)$status)
		{
			$msg .= "nom=" . $nom . "&presence=" . $status;
			send($msg);
			echo $nom . " est modifié dans tableau\n";
		}
	}
	sleep(1);
}

function search($string)
{
	global $macAddresses, $presenceTemp;
	//echo "searching in " . $string . EOL;
	foreach ($macAddresses as $nom => $needle)
	{
		//echo $nom ." => " . $needle . EOL;
		if (str_contains($string, $needle))
		{
			echo "found " . $needle . EOL;
			$presenceTemp[$nom] = true;
		}
	}
}

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 -") . $msg . __FILE__ . ":" . __LINE__ . EOL;

	if ($curlErr <= 5)
	{
		curl_exec($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;
		}
	}
}

?>