"; lo capturamos para poder
// enviar la cabecera Content-Type sin "headers already sent".
ob_start();
require __DIR__ . "/config.php";   // define $con, ID_WEB y $pre (https://host/)
ob_end_clean();

header("Content-Type: application/xml; charset=utf-8");

function loc($url)
{
    return "  <url>\n    <loc>" . htmlspecialchars($url, ENT_XML1, "UTF-8") . "</loc>\n  </url>\n";
}

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

// 1) Home -------------------------------------------------------------------
echo loc($pre);

// 2) Paginas estaticas publicas (solo si el fichero existe) ------------------
$estaticas = array(
    "catalogo.php",
    "blog.php",
    "contacto.php",
    "quienes-somos.php",
    "aviso-legal.php",
    "politica-de-privacidad.php",
    "cookies.php",
);
if (ID_WEB == 1) {
    $estaticas = array_merge($estaticas, array(
        "envases-plasticos-para-industria-alimentaria.php",
        "envases-plasticos-para-industria-horeca.php",
        "envases-plasticos-para-industria-quimica.php",
        "envases-plasticos-para-ferreteria-jardineria.php",
        "envases-plasticos-para-mantenimiento-industrial.php",
    ));
} else {
    $estaticas = array_merge($estaticas, array(
        "plasticos-para-acristalamientos.php",
        "plasticos-para-revestimientos.php",
        "plasticos-para-decoracion.php",
        "plasticos-para-senalizacion.php",
        "plasticos-para-expositores.php",
        "plasticos-para-industria.php",
    ));
}
foreach ($estaticas as $pag) {
    if (file_exists(__DIR__ . "/" . $pag)) {
        echo loc($pre . $pag);
    }
}

// 3) Categorias (formato canonico de breadcrumb: categoria.php?nivel=N&fam1=..)
$vistas = array();
$rs = mysqli_query($con, "SELECT DISTINCT fam1,fam2,fam3,fam4,nivel FROM fam WHERE web = " . ID_WEB . " AND publicar <> 'N' ORDER BY fam1,fam2,fam3,fam4,nivel");
if ($rs) {
    while ($f = mysqli_fetch_object($rs)) {
        $nivel = (int)$f->nivel;
        if ($nivel < 1) { $nivel = 1; }
        $q = "categoria.php?nivel=" . $nivel . "&fam1=" . $f->fam1;
        if ($nivel >= 2 && $f->fam2 != "") { $q .= "&fam2=" . $f->fam2; }
        if ($nivel >= 3 && $f->fam3 != "") { $q .= "&fam3=" . $f->fam3; }
        if ($nivel >= 4 && $f->fam4 != "") { $q .= "&fam4=" . $f->fam4; }
        if (!isset($vistas[$q])) {
            $vistas[$q] = true;
            echo loc($pre . $q);
        }
    }
}

// 4) Productos (URL amigable producto/{permalink}/) -------------------------
$rs = mysqli_query($con, "SELECT permalink FROM alm WHERE web = " . ID_WEB . " AND publicar <> 'N' AND permalink IS NOT NULL AND permalink <> '' ORDER BY id");
if ($rs) {
    while ($p = mysqli_fetch_object($rs)) {
        echo loc($pre . "producto/" . $p->permalink . "/");
    }
}

// 5) Posts del blog ---------------------------------------------------------
$rs = mysqli_query($con, "SELECT id FROM contenidos WHERE web = " . ID_WEB . " AND cat = 'blog' AND activar = 'S' ORDER BY fecha DESC");
if ($rs) {
    while ($b = mysqli_fetch_object($rs)) {
        echo loc($pre . "blog_post.php?id=" . (int)$b->id);
    }
}

echo '</urlset>' . "\n";