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<?php
namespace Drupal\Core\Pager;
use Drupal\Component\Utility\UrlHelper;
use Symfony\Component\HttpFoundation\RequestStack;
/**
* Provides pager information contained within the current request.
*
* @see \Drupal\Core\Pager\PagerManagerInterface
*/
class PagerParameters implements PagerParametersInterface {
/**
* The HTTP request stack.
*
* @var \Symfony\Component\HttpFoundation\RequestStack
*/
protected $requestStack;
/**
* Construct a PagerManager object.
*
* @param \Symfony\Component\HttpFoundation\RequestStack $stack
* The current HTTP request stack.
*/
public function __construct(RequestStack $stack) {
$this->requestStack = $stack;
}
/**
* {@inheritdoc}
*/
public function getQueryParameters() {
$request = $this->requestStack->getCurrentRequest();
if ($request) {
return UrlHelper::filterQueryParameters(
$request->query->all(), ['page']
);
}
return [];
}
/**
* {@inheritdoc}
*/
public function findPage($pager_id = 0) {
$pages = $this->getPagerQuery();
return (int) ($pages[$pager_id] ?? 0);
}
/**
* {@inheritdoc}
*/
public function getPagerQuery() {
$query = $this->getPagerParameter();
return !empty($query) ? explode(',', $query) : [];
}
/**
* {@inheritdoc}
*/
public function getPagerParameter() {
$request = $this->requestStack->getCurrentRequest();
if ($request) {
return $request->query->get('page', '');
}
return '';
}
}
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