Фильтр и пагинация товаров вне интернет магазина.

$oShop = Core_Entity::factory('Shop', 1);

$Shop_Controller_Show = new Shop_Controller_Show($oShop);

$oStructure = Core_Page::instance()->structure;

$Shop_Controller_Show->patternExpressions = array(
    'page' => '\d+'
);

$Shop_Controller_Show->pattern = rawurldecode($oStructure->getPath()) . '(page-{page}/)';

$Core_Router_Route = new Core_Router_Route($Shop_Controller_Show->pattern, $Shop_Controller_Show->patternExpressions);
$matches = $Core_Router_Route->applyPattern(Core::$url['path']);

$Shop_Controller_Show->limit(Core_Array::get(Core_Page::instance()->libParams, 'itemsOnPage'));

if (isset($matches['page']) && $matches['page'] > 1)
{
    $Shop_Controller_Show
        ->page($matches['page'] - 1)
        ->offset($Shop_Controller_Show->limit * $Shop_Controller_Show->page);
}
if (!$matches)
{
    // ошибка 404
    Core_Page::instance()->error404();
    return $this;
}

// Быстрый фильтр
if (Core_Array::getRequest('fast_filter'))
{
   $aJson = array();

   if ($oShop->filter)
   {
      $Shop_Controller_Show->modificationsList(TRUE);

      // В корне выводим из всех групп
      $Shop_Controller_Show->group == 0 && $Shop_Controller_Show->group(FALSE);

      $aJson['count'] = $Shop_Controller_Show->getFastFilteredCount();
   }

   Core::showJson($aJson);
}

if ($Shop_Controller_Show->item == 0)
{
   // Producers
   if (Core_Array::getGet('producer_id'))
   {
      $iProducerId = Core_Array::getGet('producer_id', 0, 'int');
      $Shop_Controller_Show->producer($iProducerId);
   }

   if (Core_Array::getGet('filter') || Core_Array::getGet('sorting'))
   {
      $Shop_Controller_Show->addEntity(
         Core::factory('Core_Xml_Entity')->name('filter')->value(1)
      );

      // Sorting
      $sorting = Core_Array::getGet('sorting', 0, 'int');

      ($sorting == 1 || $sorting == 2) && $Shop_Controller_Show->orderBy('absolute_price', $sorting == 1 ? 'ASC' : 'DESC');

      $sorting == 3 && $Shop_Controller_Show->orderBy('shop_items.name', 'ASC');

      $Shop_Controller_Show->addEntity(
         Core::factory('Core_Xml_Entity')->name('sorting')->value($sorting)
      );

      // Prices
      $Shop_Controller_Show->setFilterPricesConditions($_GET);

      // Additional properties
      $Shop_Controller_Show->setFilterPropertiesConditions($_GET);
   }
}