Correo
Argentino
Pro

// Cotización con cache de 3 niveles
public function calculate_shipping( $package ) {
  // L1: sesión activa
  if ( $rate = $this->get_session_cache( $key ) ) {
    return $this->set_rates( $rate );
  }
  // L2: WordPress transients
  if ( $rate = get_transient( "ca_rate_$key" ) ) {
    $this->set_session_cache( $key, $rate );
    return $this->set_rates( $rate );
  }
  // L3: Cloudflare Worker KV
  if ( $rate = $this->worker->get( $key ) ) {
    set_transient( "ca_rate_$key", $rate, 900 );
    return $this->set_rates( $rate );
  }
  // API real — último recurso
  $rate = $this->api->get_rates( $package );
  $this->fill_all_caches( $key, $rate );
  return $this->set_rates( $rate );
}

// Registro automático al completar
add_action(
  'woocommerce_order_status_completed',
  function( $order_id ) {
    $api = new PaqarAPI();
    $track = $api->register_shipment( $order_id );
    update_post_meta(
      $order_id,
      '_ca_tracking_number',
      $track->number
    );
  }
);