<?php declare(strict_types=1);

/**
 * Tracking pixel to be embedded during republishing 
 * on wp sites like tmpresale and freepresalepasswords.
 * 
 * @author Jordan Skoblenick <parkinglotlust@gmail.com> 2022-06-23
 */

require_once(__DIR__.'/ui.php');

// echo a 1x1 transparent gif
header('Content-type: image/gif');
echo gzinflate(base64_decode('6wzwc+flkuJiYGDg9fRwCQLSjCDMwQQkJ5QH3wNSbCVBfsEMYJC3jH0ikOLxdHEMqZiTnJCQAOSxMDB+E7cIBcl7uvq5rHNKaAIA'));

$eventId = (int)($_GET['event_id'] ?? 0);
if (!$eventId) {
	die;
}

// try and load event
$event = \EventQuery::create()->findOneByEventId($eventId);
if (!$event) {
	die;
}

// the source of the view should be in the referer (eg the page that embedded the img).
// dont track if its missing.
$source = $_SERVER['HTTP_REFERER'] ?? '';
if ($source) {
	// HTTP_CF_CONNECTING_IP will show us the actual client IP (could be ipv6). fallback to REMOTE_ADDR if not set.
	$ip = $_SERVER['HTTP_CF_CONNECTING_IP'] ?? $_SERVER['REMOTE_ADDR'];
	$userAgent = $_SERVER['HTTP_USER_AGENT'] ?? null;
	$event->trackPageView($source, $ip, $userAgent);
}