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<?php |
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namespace TreeHouse\Feeder\Resource; |
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use TreeHouse\Feeder\Resource\Transformer\ResourceTransformerInterface; |
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class ResourceCollection extends \SplStack |
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{ |
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/** |
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* @var ResourceTransformerInterface[] |
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*/ |
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protected $transformers = []; |
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/** |
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* @var array |
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*/ |
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protected $transformed = []; |
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/** |
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* @param ResourceInterface[] $resources |
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*/ |
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public function __construct(array $resources = []) |
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{ |
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$this->pushAll($resources); |
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} |
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/** |
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* @return ResourceInterface |
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*/ |
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public function current() |
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{ |
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$resource = parent::current(); |
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return $resource ? $this->transform($resource) : $resource; |
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} |
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/** |
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* @return ResourceInterface |
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*/ |
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public function shift() |
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{ |
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return $this->transform(parent::shift()); |
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} |
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/** |
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* @return ResourceInterface |
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*/ |
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public function pop() |
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{ |
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return $this->transform(parent::pop()); |
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} |
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/** |
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* @return ResourceInterface |
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*/ |
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public function bottom() |
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{ |
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return $this->transform(parent::bottom()); |
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} |
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/** |
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* @return ResourceInterface |
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*/ |
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public function top() |
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{ |
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return $this->transform(parent::top()); |
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} |
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/** |
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* @param int $index |
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* |
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* @return ResourceInterface |
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*/ |
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public function offsetGet($index) |
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{ |
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return $this->transform(parent::offsetGet($index)); |
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} |
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/** |
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* @param ResourceInterface[] $resources |
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*/ |
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public function pushAll(array $resources) |
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{ |
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foreach ($resources as $resource) { |
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$this->push($resource); |
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} |
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$this->rewind(); |
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} |
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/** |
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* @param ResourceInterface[] $resources |
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*/ |
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public function unshiftAll(array $resources) |
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{ |
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foreach (array_reverse($resources) as $resource) { |
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$this->unshift($resource); |
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} |
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$this->rewind(); |
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} |
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/** |
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* @param ResourceTransformerInterface $transformer |
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*/ |
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public function addTransformer(ResourceTransformerInterface $transformer) |
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{ |
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$this->transformers[] = $transformer; |
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} |
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/** |
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* @param ResourceInterface $resource |
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* |
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* @return ResourceInterface |
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*/ |
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protected function transform(ResourceInterface $resource) |
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{ |
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$hash = spl_object_hash($resource); |
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// see if it needs transforming |
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if (!in_array($hash, $this->transformed)) { |
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foreach ($this->transformers as $transformer) { |
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if ($transformer->needsTransforming($resource)) { |
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$resource = $transformer->transform($resource, $this); |
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} |
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} |
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$this->transformed[] = $hash; |
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} |
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return $resource; |
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} |
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} |
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treehouselabs /
feeder
