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<?php |
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namespace Zenstruck\Porpaginas\Callback; |
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use Zenstruck\Porpaginas\Page; |
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/** |
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* @author Kevin Bond <[email protected]> |
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*/ |
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final class CallbackPage implements Page |
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{ |
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private $resultCallback; |
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private $totalCountCallback; |
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private int $offset; |
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private int $limit; |
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private ?int $totalCount = null; |
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private ?\ArrayIterator $results = null; |
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/** |
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* @param callable $resultCallback Returns an array |
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* @param callable $totalCountCallback Returns an integer |
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*/ |
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public function __construct(callable $resultCallback, callable $totalCountCallback, int $offset, int $limit) |
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{ |
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$this->resultCallback = $resultCallback; |
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$this->totalCountCallback = $totalCountCallback; |
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$this->offset = $offset; |
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$this->limit = $limit; |
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} |
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public function currentOffset(): int |
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{ |
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return $this->offset; |
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} |
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public function currentPage(): int |
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{ |
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return \floor($this->offset / $this->limit) + 1; |
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} |
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public function currentLimit(): int |
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{ |
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return $this->limit; |
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} |
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public function count(): int |
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{ |
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return \count($this->getResults()); |
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} |
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public function totalCount(): int |
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{ |
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if (null !== $this->totalCount) { |
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return $this->totalCount; |
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} |
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return $this->totalCount = \call_user_func($this->totalCountCallback); |
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} |
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public function getIterator(): \Traversable |
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{ |
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return $this->getResults(); |
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} |
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private function getResults(): \ArrayIterator |
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{ |
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if (null !== $this->results) { |
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return $this->results; |
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} |
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return $this->results = new \ArrayIterator(\call_user_func($this->resultCallback, $this->offset, $this->limit)); |
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} |
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} |
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kbond /
porpaginas
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