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<?php |
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namespace Abacaphiliac\Zend\Transformer; |
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use Abacaphiliac\Zend\Transformer\Exception\TransformationException; |
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use Assert\Assertion; |
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use Assert\AssertionFailedException; |
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use Zend\Hydrator\ExtractionInterface; |
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use Zend\Hydrator\HydrationInterface; |
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use Zend\Validator\ValidatorInterface; |
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class Transformer implements TransformerInterface |
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{ |
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/** @var ValidatorInterface */ |
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private $inputValidator; |
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/** @var ExtractionInterface */ |
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private $extractor; |
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/** @var callable */ |
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private $transformer; |
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/** @var HydrationInterface */ |
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private $hydrator; |
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/** @var ValidatorInterface */ |
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private $outputValidator; |
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/** |
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* Transformer constructor. |
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* @param ValidatorInterface $inputValidator |
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* @param ExtractionInterface $extractor |
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* @param callable $transformer |
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* @param HydrationInterface $hydrator |
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* @param ValidatorInterface $outputValidator |
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*/ |
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public function __construct( |
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ValidatorInterface $inputValidator, |
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ExtractionInterface $extractor, |
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callable $transformer, |
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HydrationInterface $hydrator, |
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ValidatorInterface $outputValidator |
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) { |
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$this->inputValidator = $inputValidator; |
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$this->extractor = $extractor; |
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$this->transformer = $transformer; |
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$this->hydrator = $hydrator; |
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$this->outputValidator = $outputValidator; |
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} |
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/** |
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* @param mixed $input |
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* @param mixed|string $output |
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* @return mixed |
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* @throws \Abacaphiliac\Zend\Transformer\Exception\TransformationException |
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*/ |
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public function transform($input, $output) |
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{ |
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try { |
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if (is_string($output)) { |
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Assertion::classExists($output); |
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$output = new $output; |
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} |
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$this->validateObject($input, $this->inputValidator); |
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$inputData = $this->extract($input); |
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$outputData = $this->transformInputData($inputData); |
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$output = $this->hydrate($outputData, $output); |
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$this->validateObject($output, $this->outputValidator); |
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} catch (AssertionFailedException $e) { |
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throw new TransformationException('Transformation failed.', null, $e); |
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} catch (\Exception $e) { |
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throw new TransformationException('Transformation failed.', null, $e); |
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} |
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return $output; |
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} |
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/** |
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* @param mixed $object |
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* @param ValidatorInterface $validator |
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* @return void |
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* @throws \Zend\Validator\Exception\RuntimeException |
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* @throws AssertionFailedException |
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*/ |
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private function validateObject($object, ValidatorInterface $validator) |
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{ |
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Assertion::isObject($object); |
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$isValid = $validator->isValid($object); |
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Assertion::true($isValid, 'Validation failed: ' . json_encode($validator->getMessages())); |
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} |
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/** |
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* @param mixed $object |
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* @return mixed[] |
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* @throws AssertionFailedException |
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*/ |
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private function extract($object) |
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{ |
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Assertion::isObject($object); |
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$data = $this->extractor->extract($object); |
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Assertion::isArray($data); |
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return $data; |
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} |
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/** |
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* @param mixed[] $input |
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* @return mixed[] |
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* @throws AssertionFailedException |
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*/ |
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private function transformInputData(array $input) |
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{ |
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$output = call_user_func($this->transformer, $input); |
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Assertion::isArray($output); |
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return $output; |
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} |
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/** |
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* @param mixed[] $data |
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* @param mixed|string $object |
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* @return mixed |
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* @throws AssertionFailedException |
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*/ |
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private function hydrate(array $data, $object) |
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{ |
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Assertion::isObject($object); |
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$output = $this->hydrator->hydrate($data, $object); |
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Assertion::isObject($output); |
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return $output; |
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} |
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} |
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abacaphiliac /
zend-transformer
