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<?php |
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declare(strict_types=1); |
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namespace YucaDoo\PolymorphicFractal; |
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use Mouf\AliasContainer\AliasContainer; |
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use League\Fractal\TransformerAbstract; |
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use League\Fractal\Scope; |
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class Transformer extends TransformerAbstract |
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{ |
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/** @var AliasContainer */ |
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private $registry; |
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/** |
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* Tranformer based on current data. |
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* @var TransformerAbstract |
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*/ |
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private $currentTransformer; |
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/** |
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* Constructor. |
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* @param AliasContainer $registry Registry providing specific transformers. |
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*/ |
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public function __construct(AliasContainer $registry) |
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{ |
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$this->registry = $registry; |
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} |
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/** |
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* Getter for registry. |
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* @return AliasContainer |
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*/ |
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public function getRegistry(): AliasContainer |
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{ |
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return $this->registry; |
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} |
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/** |
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* Getter for currentTransformer. |
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* @return TransformerAbstract Current transformer. |
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*/ |
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public function getCurrentTransformer() |
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{ |
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return $this->currentTransformer; |
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} |
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/** |
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* Sets currentTransformer based on transformation data. |
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* @param mixed $data Transformation data based on which current transformer is set. |
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* @return self |
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*/ |
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protected function setCurrentTransformer($data) |
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{ |
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// Transformer to be used |
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$registryKey = $this->getRegistryKey($data); |
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$this->currentTransformer = $this->registry->get($registryKey); |
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// Apply current scope to current tranformer as well. |
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$this->currentTransformer->setCurrentScope($this->getCurrentScope()); |
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return $this; |
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} |
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/** |
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* Get registry key from data. |
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* @param mixed $data Data for which transformer should be got. |
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* @return mixed Registry key for transformer. |
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*/ |
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protected function getRegistryKey($data) |
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{ |
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return get_class($data); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getAvailableIncludes() |
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{ |
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return array_merge( |
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parent::getAvailableIncludes(), |
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$this->getCurrentTransformer()->getAvailableIncludes() |
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); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getDefaultIncludes() |
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{ |
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return array_merge( |
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parent::getDefaultIncludes(), |
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$this->getCurrentTransformer()->getDefaultIncludes() |
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); |
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} |
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/** |
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* |
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*/ |
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public function transform($data) |
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{ |
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$this->setCurrentTransformer($data); |
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// The typehint and variable below prevent a PHP Stan linting error. |
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/** @var mixed */ |
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$currentTransformer = $this->getCurrentTransformer(); |
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return $currentTransformer->transform($data); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function callIncludeMethod(Scope $scope, $includeName, $data) |
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{ |
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try { |
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// Try to invoke include from this transformer |
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return parent::callIncludeMethod(...func_get_args()); |
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} catch (\Throwable $e) { |
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// Include method doesn't exist in this class, forward include to current transformer |
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return $this->getCurrentTransformer()->callIncludeMethod(...func_get_args()); |
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} |
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} |
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} |
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yucadoo /
polymorphic-fractal
