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<?php

// store user @IP who can join this page (still have their status.php tab open) in a file.

$filename = '/tmp/current_users.txt';

$user_ip = $_SERVER['REMOTE_ADDR'];

$isConnected = exec('sudo /usr/sbin/chilli_query list | awk '.escapeshellarg('($2 == "'.$user_ip.'") {print $5}'));

if ($isConnected === '0') {

	exit();

}

if ((!file_exists($filename)) || (filesize($filename) === 0)) {

	// Creating file and write user @IP.

	file_put_contents($filename, $user_ip.':TEMP'.PHP_EOL);

} else {

	// If we found duplicate user IP, it will not be writen again

	$found = false;

	$fh = fopen($filename, 'r');

	while (!feof($fh)) {

		$line = fgets($fh, 1024);

		if (preg_match('/^'.preg_quote($user_ip).':/', $line)) {

			$found = true;

			break;

		}

	}

	fclose($fh);

	// else we write user IP in the file

	if (!$found) {

		file_put_contents($filename, $user_ip.':TEMP'.PHP_EOL, FILE_APPEND);

	}

}