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<?php |
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declare(strict_types=1); |
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namespace Setono\SyliusPaginationPlugin\EventListener; |
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use Fig\Link\GenericLinkProvider; |
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use Fig\Link\Link; |
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use Psr\Link\EvolvableLinkProviderInterface; |
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use Setono\SyliusPaginationPlugin\EventHandler\EventHandlerInterface; |
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use Symfony\Component\EventDispatcher\Event; |
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use Symfony\Component\HttpFoundation\Request; |
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use Symfony\Component\HttpFoundation\RequestStack; |
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use Webmozart\Assert\Assert; |
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final class AddPaginationLinksListener |
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{ |
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/** |
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* @var RequestStack |
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*/ |
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private $requestStack; |
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/** |
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* @var EventHandlerInterface |
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*/ |
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private $eventHandler; |
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/** |
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* @var string |
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*/ |
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private $pageParameter; |
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public function __construct(RequestStack $requestStack, EventHandlerInterface $eventHandler, string $pageParameter) |
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{ |
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$this->requestStack = $requestStack; |
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$this->eventHandler = $eventHandler; |
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$this->pageParameter = $pageParameter; |
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} |
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public function handle(Event $event): void |
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{ |
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if (!$this->eventHandler->supports($event)) { |
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return; |
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} |
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$paginationParameters = $this->eventHandler->handle($event); |
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$request = $paginationParameters->getRequest(); |
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// do not add prev/next links to ajax requests |
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if ($request->isXmlHttpRequest()) { |
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return; |
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} |
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// only add prev/next links if the request is the master request |
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if ($request !== $this->requestStack->getMasterRequest()) { |
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return; |
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} |
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$numberOfResults = $paginationParameters->getNumberOfResults(); |
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$pages = ceil($numberOfResults / $paginationParameters->getMaxPerPage()); |
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$links = []; |
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// prev link |
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if ($paginationParameters->getCurrentPage() > 1) { |
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$links[] = new Link('prev', $this->getPageUrl($request, $paginationParameters->getCurrentPage() - 1)); |
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} |
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// next link |
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if ($paginationParameters->getCurrentPage() < $pages) { |
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$links[] = new Link('next', $this->getPageUrl($request, $paginationParameters->getCurrentPage() + 1)); |
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} |
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if (count($links) > 0) { |
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/** @var EvolvableLinkProviderInterface $linkProvider */ |
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$linkProvider = $request->attributes->get('_links', new GenericLinkProvider()); |
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foreach ($links as $link) { |
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$linkProvider = $linkProvider->withLink($link); |
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} |
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$request->attributes->set('_links', $linkProvider); |
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} |
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} |
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private function getPageUrl(Request $request, int $page): string |
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{ |
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Assert::greaterThan($page, 0); |
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$components = parse_url($request->getUri()); |
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$uri = $components['scheme'] . '://' . $components['host']; |
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if (array_key_exists('port', $components)) { |
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$uri .= $components['port']; |
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} |
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if (array_key_exists('path', $components)) { |
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$uri .= $components['path']; |
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} |
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$queryComponents = []; |
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if (array_key_exists('query', $components)) { |
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parse_str($components['query'], $queryComponents); |
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} |
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if (1 === $page) { |
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// strip page parameter |
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unset($queryComponents[$this->pageParameter]); |
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} else { |
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$queryComponents[$this->pageParameter] = $page; |
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} |
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if (count($queryComponents) > 0) { |
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$uri .= '?' . http_build_query($queryComponents, '', '&', PHP_QUERY_RFC3986); |
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} |
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return $uri; |
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} |
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} |
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Setono /
SyliusPaginationPlugin
