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<?php |
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namespace BenTools\Pager\Model\Factory; |
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use BenTools\Pager\Contract\PageInterface; |
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use BenTools\Pager\Contract\PagerFactoryInterface; |
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use BenTools\Pager\Contract\PagerInterface; |
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use BenTools\Pager\Contract\PageUrlBuilderInterface; |
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use BenTools\Pager\Model\Pager; |
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use function BenTools\QueryString\query_string; |
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use function BenTools\UriFactory\Helper\uri; |
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class OffsetParameterUrlBuilder implements PageUrlBuilderInterface, PagerFactoryInterface |
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{ |
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/** |
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* @var string |
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*/ |
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private $baseUrl; |
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/** |
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* @var int |
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*/ |
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private $perPage; |
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/** |
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* @var string |
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*/ |
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private $offsetQueryParam; |
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/** |
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* PageUrlBuilder constructor. |
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* @param string $baseUrl |
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* @param int $perPage |
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* @param string $offsetQueryParam |
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*/ |
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public function __construct(string $baseUrl, int $perPage, string $offsetQueryParam) |
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{ |
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$this->baseUrl = $baseUrl; |
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$this->perPage = max(0, $perPage); |
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$this->offsetQueryParam = $offsetQueryParam; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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private function getCurrentPageNumber(): int |
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{ |
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$qs = query_string(uri($this->baseUrl)); |
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$currentOffset = (int) max(0, $qs->getParam($this->offsetQueryParam) ?? 0); |
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return (int) floor($currentOffset / $this->perPage) + 1; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function buildUrl(PagerInterface $pager, PageInterface $page): string |
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{ |
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$uri = uri($this->baseUrl); |
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$qs = query_string($uri->getQuery()); |
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return (string) $uri->withQuery( |
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(string) $qs->withParam( |
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$this->offsetQueryParam, |
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$pager->getPageOffset($page) |
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) |
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); |
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} |
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/** |
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* @param int $perPage |
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* @param string $offsetParam |
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* @return OffsetParameterUrlBuilder |
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* @throws \RuntimeException |
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*/ |
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public static function fromRequestUri(int $perPage, string $offsetParam): self |
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{ |
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if (!isset($_SERVER['REQUEST_URI'])) { |
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throw new \RuntimeException('$_SERVER[\'REQUEST_URI\'] is not set.'); |
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} |
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return new static($_SERVER['REQUEST_URI'], $perPage, $offsetParam); |
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} |
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/** |
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* @param int|null $numFound |
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* @return PagerInterface |
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*/ |
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public function createPager(int $numFound = null): PagerInterface |
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{ |
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$pager = new Pager($this->perPage, $this->getCurrentPageNumber(), $numFound, $this); |
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return $pager; |
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} |
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} |
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bpolaszek /
bentools-pager
