<?php
// Header XML agar Google Bot mengenalinya sebagai Sitemap
header("Content-Type: application/xml; charset=utf-8");

// Konfigurasi URL dan Folder
$base_url = "https://sman2siantar.sch.id/blog/";
$target_folder = "viral"; 
$full_path = $_SERVER['DOCUMENT_ROOT'] . "/blog/" . $target_folder;

// File yang tidak ingin ditampilkan
$ignore = array('.', '..', '.htaccess', 'index.php', 'config.php', 'wp-config.php', 'error_log');

echo '<?xml version="1.0" encoding="UTF-8"?>';
echo '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">';

// 1. Tambahkan URL Utama Folder Viral
echo '
<url>
    <loc>'.$base_url.$target_folder.'/</loc>
    <lastmod>'.date('Y-m-d').'</lastmod>
    <changefreq>hourly</changefreq>
    <priority>1.0</priority>
</url>';

/**
 * Fungsi Rekursif Scan Folder Viral
 */
function scan_viral_content($dir, $base_url, $ignore) {
    if (!is_dir($dir)) return;

    $items = scandir($dir);

    foreach ($items as $item) {
        if (in_array($item, $ignore)) continue;

        $path = $dir . DIRECTORY_SEPARATOR . $item;
        
        if (is_dir($path)) {
            // Masuk ke subfolder di dalam /viral/
            scan_viral_content($path, $base_url, $ignore);
        } else {
            // Filter ekstensi file yang valid untuk SEO
            $ext = pathinfo($item, PATHINFO_EXTENSION);
            if (in_array($ext, ['php', 'html', 'pdf', 'htm'])) {
                
                // Konversi path sistem menjadi URL website
                $web_path = str_replace($_SERVER['DOCUMENT_ROOT'], '', $path);
                $clean_url = "https://sman2siantar.sch.id" . str_replace('\\', '/', $web_path);
                
                // Ambil tanggal terakhir file diupdate
                $last_mod = date("Y-m-d", filemtime($path));

                echo '<url>';
                echo '<loc>' . htmlspecialchars($clean_url) . '</loc>';
                echo '<lastmod>' . $last_mod . '</lastmod>';
                echo '<changefreq>daily</changefreq>';
                echo '<priority>0.8</priority>';
                echo '</url>';
            }
        }
    }
}

// Jalankan pemindaian otomatis
if (file_exists($full_path)) {
    scan_viral_content($full_path, $base_url, $ignore);
}

echo '</urlset>';
?>