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<?php |
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declare(strict_types=1); |
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namespace Paysera\Pagination\Service; |
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use DateTimeInterface; |
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use Paysera\Pagination\Entity\OrderingConfiguration; |
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use Paysera\Pagination\Entity\ParsedCursor; |
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use Paysera\Pagination\Exception\InvalidCursorException; |
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use Symfony\Component\PropertyAccess\PropertyAccessorInterface; |
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class CursorBuilder implements CursorBuilderInterface |
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{ |
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private $propertyAccessor; |
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public function __construct(PropertyAccessorInterface $propertyAccessor) |
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{ |
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$this->propertyAccessor = $propertyAccessor; |
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} |
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public function parseCursor(string $cursor, int $requiredCount): ParsedCursor |
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{ |
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$parsedCursor = new ParsedCursor(); |
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$serializedCursor = $cursor; |
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if (substr($cursor, 0, 1) === '=') { |
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$serializedCursor = substr($cursor, 1); |
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$parsedCursor->setCursoredItemIncluded(true); |
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} |
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$decoded = json_decode(sprintf('[%s]', $serializedCursor), false); |
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if (!is_array($decoded)) { |
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throw new InvalidCursorException(); |
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} |
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if (count($decoded) !== $requiredCount) { |
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throw new InvalidCursorException(); |
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} |
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foreach ($decoded as $value) { |
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if (!is_string($value)) { |
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throw new InvalidCursorException(); |
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} |
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} |
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return $parsedCursor->setCursorElements($decoded); |
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} |
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public function buildCursorWithIncludedItem(string $cursor): string |
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{ |
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return '=' . $cursor; |
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} |
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public function invertCursorInclusion(string $cursor): string |
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{ |
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return substr($cursor, 0, 1) === '=' ? substr($cursor, 1) : '=' . $cursor; |
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} |
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/** |
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* @param mixed $item |
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* @param array|\Paysera\Pagination\Entity\OrderingConfiguration[] $orderingConfigurations |
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* @return string |
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*/ |
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public function getCursorFromItem($item, array $orderingConfigurations): string |
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{ |
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$cursor = []; |
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foreach ($orderingConfigurations as $orderingConfiguration) { |
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$cursor[] = $this->getCursorItemValue($item, $orderingConfiguration); |
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} |
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return $this->convertArrayToCursor($cursor); |
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} |
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private function getCursorItemValue($item, OrderingConfiguration $orderingConfiguration): string |
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{ |
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if ($orderingConfiguration->getAccessorPath() !== null) { |
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$value = $this->propertyAccessor->getValue($item, $orderingConfiguration->getAccessorPath()); |
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} else { |
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$value = call_user_func($orderingConfiguration->getAccessorClosure(), $item); |
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} |
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return $this->processValue($value); |
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} |
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private function processValue($value): string |
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{ |
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if ($value instanceof DateTimeInterface) { |
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return $value->format('Y-m-d H:i:s'); |
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} |
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return (string)$value; |
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} |
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private function convertArrayToCursor(array $cursorElements): string |
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{ |
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return trim(json_encode($cursorElements), '[]'); |
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} |
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} |
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paysera /
lib-pagination
