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<?php |
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namespace Lneicelis\Transformer; |
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use Lneicelis\Transformer\Exception\TransformerNotFoundException; |
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use Lneicelis\Transformer\Helper\Arr; |
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use Lneicelis\Transformer\ValueObject\Context; |
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use Lneicelis\Transformer\ValueObject\Deferred; |
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use Lneicelis\Transformer\ValueObject\Path; |
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class DeferredAwareTransformer extends Transformer |
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{ |
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/** @var array[] */ |
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private $deferredTree = []; |
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/** @var LoaderRegistry */ |
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private $loaderRegistry; |
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public function __construct(array $pipes, LoaderRegistry $loaderRegistry) |
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{ |
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parent::__construct($pipes); |
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$this->loaderRegistry = $loaderRegistry; |
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} |
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/** |
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* @param mixed $resource |
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* @param Context|null $context |
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* @return string|int|float|array |
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* @throws TransformerNotFoundException |
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*/ |
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public function transform($resource, Context $context = null) |
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{ |
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$context = $context ?: new Context(); |
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$result = parent::transform($resource, $context); |
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$result = $this->loadDeferred($result, $context); |
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return $result; |
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} |
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/** |
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* @param $deferred |
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* @param Context $context |
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* @param Path $path |
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* @return array|float|int|string |
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* @throws TransformerNotFoundException |
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*/ |
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protected function transformAny($deferred, Context $context, Path $path) |
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{ |
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if (! $deferred instanceof Deferred) { |
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return parent::transformAny($deferred, $context, $path); |
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} |
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$resource = $deferred->getResource(); |
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$property = $deferred->getProperty(); |
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$resourceClass = get_class($resource); |
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$this->deferredTree = Arr::setValue($this->deferredTree, [$resourceClass, $property, (string)$path], $deferred); |
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return null; |
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} |
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/** |
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* @param array $result |
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* @param Context $context |
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* @return array |
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* @throws TransformerNotFoundException |
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*/ |
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protected function loadDeferred(array $result, Context $context): array |
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{ |
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foreach ($this->deferredTree as $resourceClass => $properties) { |
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foreach ($properties as $property => $deferredByPath) { |
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$loader = $this->loaderRegistry->getLoader($resourceClass, $property); |
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$paths = array_keys($deferredByPath); |
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$deferreds = array_values($deferredByPath); |
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unset($this->deferredTree[$resourceClass][$property]); |
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$loadedValues = $loader->load($deferreds); |
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$transformedValues = $this->transform($loadedValues, $context); |
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foreach ($paths as $index => $path) { |
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/** @var Path $path */ |
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$result = Arr::setValue( |
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$result, |
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explode('.', $path), |
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$transformedValues[$index] |
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); |
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} |
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} |
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} |
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return $result; |
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} |
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} |
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lneicelis /
transformer
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