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<?php |
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namespace Tonic\Component\ApiLayer\ModelTransformer; |
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use Tonic\Component\ApiLayer\ModelTransformer\Exception\UnsupportedTransformationException; |
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/** |
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* Manages transformers. |
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*/ |
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class ModelTransformer implements ModelTransformerInterface |
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{ |
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/** |
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* @var array |
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*/ |
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private $modelTransformers = []; |
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/** |
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* @var array |
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*/ |
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private $sorted = []; |
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/** |
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* @param ModelTransformerInterface $modelTransformer |
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* @param int $priority |
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* |
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* @return $this|ModelTransformerInterface |
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* |
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* @throws \RuntimeException |
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*/ |
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public function addModelTransformer($modelTransformer, $priority = 0) |
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{ |
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if (!(($modelTransformer instanceof ModelTransformerInterface) || ($modelTransformer instanceof ContextualModelTransformerInterface))) { |
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throw new \RuntimeException( |
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sprintf('Model transformer should be an instance of "%s" or "%s"', ModelTransformerInterface::class, ContextualModelTransformerInterface::class) |
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); |
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} |
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if (!isset($this->modelTransformers[$priority])) { |
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$this->modelTransformers[$priority] = []; |
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} |
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$this->modelTransformers[$priority][] = $modelTransformer; |
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unset($this->sorted); |
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return $this; |
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} |
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/** |
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* @return ModelTransformerInterface[] |
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*/ |
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public function getModelTransformers() |
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{ |
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if (isset($this->sorted)) { |
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return $this->sorted; |
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} |
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krsort($this->modelTransformers); |
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$this->sorted = []; |
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foreach ($this->modelTransformers as $modelTransformers) { |
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$this->sorted = array_merge($this->sorted, $modelTransformers); |
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} |
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return $this->sorted; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function supports($object, $targetClass) |
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{ |
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/** @var ContextInterface $context */ |
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$context = (func_num_args() == 3) ? func_get_arg(2) : null; |
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foreach ($this->getModelTransformers() as $modelTransformer) { |
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if (($modelTransformer instanceof ContextualModelTransformerInterface) && $modelTransformer->supports($object, $targetClass, $context)) { |
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return true; |
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} |
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if (($modelTransformer instanceof ModelTransformerInterface) && $modelTransformer->supports($object, $targetClass)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function transform($object, $targetClass) |
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{ |
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/** @var ContextInterface $context */ |
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$context = (func_num_args() == 3) ? func_get_arg(2) : null; |
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$modelTransformer = $this->findSupportedModelTransformer($object, $targetClass, $context); |
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if ($modelTransformer instanceof ContextualModelTransformerInterface) { |
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return $modelTransformer->transform($object, $targetClass, $context); |
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} |
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if (($modelTransformer instanceof ModelTransformerInterface) && $modelTransformer->supports($object, $targetClass)) { |
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return $modelTransformer->transform($object, $targetClass); |
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} |
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$objectType = is_object($object) ? get_class($object) : gettype($object); |
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throw new UnsupportedTransformationException(sprintf( |
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'Can not transform object of type "%s" to object of type "%s"', |
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$objectType, |
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$targetClass |
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)); |
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} |
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/** |
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* Finds and returns model transformer which supports specified object and target class. |
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* |
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* @param object|array $object |
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* @param string $targetClass |
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* @param ContextInterface|null $context |
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* |
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* @return null|ModelTransformerInterface |
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*/ |
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public function findSupportedModelTransformer($object, $targetClass, ContextInterface $context = null) |
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{ |
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foreach ($this->getModelTransformers() as $modelTransformer) { |
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if (($modelTransformer instanceof ContextualModelTransformerInterface) && $modelTransformer->supports($object, $targetClass, $context)) { |
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return $modelTransformer; |
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} |
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if (($modelTransformer instanceof ModelTransformerInterface) && $modelTransformer->supports($object, $targetClass)) { |
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return $modelTransformer; |
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} |
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} |
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return null; |
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} |
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} |
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tonicforhealth /
model-transformer
