<?php
/**
 * Pixel Board Tracking Endpoint
 * Replaces: pixel-board.cfm
 *
 * Tracks forum/board thread views.
 */

require_once __DIR__ . '/config.php';
require_once __DIR__ . '/PixelResponse.php';
require_once __DIR__ . '/EventBuffer.php';

// --- Validate input ---
$threadid = filter_input(INPUT_GET, 'threadid', FILTER_VALIDATE_INT);

// --- Send 1x1 GIF and close client connection ---
PixelResponse::sendPixelAndFlush();

// --- Everything below is invisible to the client ---

if (!$threadid) {
    exit;
}

EventBuffer::append('boardstats', [
    'id' => $threadid,
]);