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<?php |
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namespace Lneicelis\Transformer\Pipe; |
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use Lneicelis\Transformer\Contract\CanPipe; |
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use Lneicelis\Transformer\Contract\HasLazyProperties; |
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use Lneicelis\Transformer\Contract\HasSchema; |
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use Lneicelis\Transformer\Exception\TransformerNotFoundException; |
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use Lneicelis\Transformer\TransformerRegistry; |
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use Lneicelis\Transformer\ValueObject\Context; |
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use Lneicelis\Transformer\ValueObject\Path; |
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class LazyPropertiesPipe implements CanPipe |
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{ |
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/** @var TransformerRegistry */ |
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protected $transformerRepository; |
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/** |
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* @param TransformerRegistry $transformerRepository |
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*/ |
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public function __construct(TransformerRegistry $transformerRepository) |
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{ |
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$this->transformerRepository = $transformerRepository; |
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} |
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/** |
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* @param object $resource |
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* @param Context $context |
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* @param Path $path |
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* @param $data |
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* @return array |
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* @throws TransformerNotFoundException |
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*/ |
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public function pipe($resource, Context $context, Path $path, $data) |
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{ |
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if (! $context instanceof HasSchema) { |
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return $data; |
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} |
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$transformer = $this->transformerRepository->getTransformer($resource); |
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if (! $transformer instanceof HasLazyProperties) { |
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return $data; |
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} |
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$schema = $this->getPathSchema($path, $context->getSchema()); |
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$properties = $this->getProperties($schema); |
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return array_reduce( |
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$properties, |
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function (array $data, string $key) use ($resource, $transformer) { |
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if (! array_key_exists($key, $data)) { |
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$data[$key] = $transformer->{$key}($resource); |
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} |
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return $data; |
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}, |
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$data |
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); |
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} |
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private function getProperties(array $schema): array |
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{ |
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return array_map(function ($value, $key) { |
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return is_string($value) ? $value : $key; |
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}, $schema, array_keys($schema)); |
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} |
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private function getPathSchema(Path $path, array $schema): array |
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{ |
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$segments = array_filter($path->getSegments(), function ($segment) { |
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return ! is_numeric($segment); |
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}); |
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return $this->arrayGet($schema, $segments, []); |
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} |
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private function arrayGet(array $array, array $path, $default): array |
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{ |
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foreach ($path as $key) { |
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if (! array_key_exists($key, $array)) { |
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return $default; |
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} |
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$array = $array[$key]; |
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} |
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return $array; |
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} |
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} |
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