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<?php
namespace Bitrix\Catalog\Component\GridVariation;
use Bitrix\Main\Application;
/**
* Object for save/load grid state operations.
*/
class GridStateStorage
{
private const FIELD_CURRENT_PAGE = 'currentPage';
private const FIELD_DEADLINE = 'deadline';
private const DEADLINE_SEC = 60;
/**
* Storage key.
*
* @param int $productId
* @param string $gridId
*
* @return string
*/
private function getStorageKey(int $productId, string $gridId): string
{
return "{$productId}_{$gridId}";
}
/**
* Load state.
*
* @param int $productId
* @param string $gridId
*
* @return GridState
*/
public function load(int $productId, string $gridId): GridState
{
$state = new GridState($productId, $gridId);
$key = $this->getStorageKey($productId, $gridId);
$cache = Application::getInstance()->getLocalSession($key);
// postponed every minute so that the pages do not stick forever.
$deadline = (int)$cache->get(self::FIELD_DEADLINE);
if ($deadline < time())
{
$cache->set(self::FIELD_DEADLINE, time() + self::DEADLINE_SEC);
}
else
{
$currentPage = $cache->get(self::FIELD_CURRENT_PAGE);
if (isset($currentPage))
{
$state->setCurrentPage((int)$currentPage);
}
}
return $state;
}
/**
* Save state.
*
* @param GridState $state
*
* @return void
*/
public function save(GridState $state): void
{
$key = $this->getStorageKey($state->getProductId(), $state->getGridId());
$cache = Application::getInstance()->getLocalSession($key);
$cache->set(self::FIELD_CURRENT_PAGE, $state->getCurrentPage());
$cache->set(self::FIELD_DEADLINE, time() + self::DEADLINE_SEC);
}
}