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<?php |
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/** |
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* This file is part of the BEAR.Package package. |
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* |
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* @license http://opensource.org/licenses/MIT MIT |
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*/ |
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namespace BEAR\Package\Provide\Representation; |
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use BEAR\Resource\AbstractRequest; |
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use BEAR\Resource\AbstractUri; |
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use BEAR\Resource\Annotation\Link; |
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use BEAR\Resource\RenderInterface; |
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use BEAR\Resource\ResourceInterface; |
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use BEAR\Resource\ResourceObject; |
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use Doctrine\Common\Annotations\Reader; |
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use Nocarrier\Hal; |
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/** |
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* HAL(Hypertext Application Language) renderer |
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*/ |
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class HalRenderer implements RenderInterface |
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{ |
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/** |
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* @var Reader |
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*/ |
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private $reader; |
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/** |
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* @var ResourceInterface |
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*/ |
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private $resource; |
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/** |
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* @var HalLink |
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*/ |
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private $link; |
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public function __construct(Reader $reader, ResourceInterface $resource, HalLink $link) |
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{ |
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$this->reader = $reader; |
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$this->resource = $resource; |
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$this->link = $link; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function render(ResourceObject $ro) |
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{ |
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if ($ro->view) { |
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return $ro->view; |
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} |
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$method = 'on' . ucfirst($ro->uri->method); |
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if (! method_exists($ro, $method)) { |
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$ro->view = ''; // no view for OPTIONS request |
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return ''; |
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} |
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$annotations = $this->reader->getMethodAnnotations(new \ReflectionMethod($ro, $method)); |
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return $this->renderHal($ro, $annotations); |
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} |
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private function renderHal(ResourceObject $ro, $annotations) : string |
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{ |
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list($ro, $body) = $this->valuate($ro); |
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/* @var $annotations Link[] */ |
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/* @var $ro ResourceObject */ |
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$hal = $this->getHal($ro->uri, $body, $annotations); |
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$ro->view = $hal->asJson(true) . PHP_EOL; |
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$this->updateHeaders($ro); |
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return $ro->view; |
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} |
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private function valuateElements(ResourceObject &$ro) |
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{ |
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foreach ($ro->body as $key => &$embeded) { |
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if ($embeded instanceof AbstractRequest) { |
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$isDefferentSchema = $this->isDifferentSchema($ro, $embeded->resourceObject); |
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if ($isDefferentSchema === true) { |
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$ro->body['_embedded'][$key] = $embeded()->body; |
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unset($ro->body[$key]); |
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continue; |
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} |
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unset($ro->body[$key]); |
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$view = $this->render($embeded()); |
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$ro->body['_embedded'][$key] = json_decode($view); |
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} |
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} |
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} |
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/** |
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* Return "is different schema" (page <-> app) |
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*/ |
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private function isDifferentSchema(ResourceObject $parentRo, ResourceObject $childRo) : bool |
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{ |
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return $parentRo->uri->scheme . $parentRo->uri->host !== $childRo->uri->scheme . $childRo->uri->host; |
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} |
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private function getHal(AbstractUri $uri, array $body, array $annotations) : Hal |
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{ |
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$query = $uri->query ? '?' . http_build_query($uri->query) : ''; |
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$path = $uri->path . $query; |
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$selfLink = $this->link->getReverseLink($path); |
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$hal = new Hal($selfLink, $body); |
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$hal = $this->link->addHalLink($body, $annotations, $hal); |
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return $hal; |
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} |
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/** |
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* @return array [ResourceObject, array] |
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*/ |
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private function valuate(ResourceObject $ro) : array |
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{ |
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// evaluate all request in body. |
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if (is_array($ro->body)) { |
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$this->valuateElements($ro); |
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} |
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// HAL |
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$body = $ro->body ?: []; |
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if (is_scalar($body)) { |
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$body = ['value' => $body]; |
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return [$ro, $body]; |
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} |
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return[$ro, (array) $body]; |
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} |
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private function updateHeaders(ResourceObject $ro) |
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{ |
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$ro->headers['content-type'] = 'application/hal+json'; |
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if (isset($ro->headers['Location'])) { |
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$ro->headers['Location'] = $this->link->getReverseLink($ro->headers['Location']); |
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} |
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} |
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} |
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