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<?php |
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namespace Nocarrier; |
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class JsonHalFactory |
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{ |
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/** |
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* Decode a application/hal+json document into a Nocarrier\Hal object. |
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* |
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* @param string $text |
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* @param int $depth |
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* @static |
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* @access public |
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* @return \Nocarrier\Hal |
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*/ |
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public static function fromJson(Hal $hal, $text, $depth = 0) |
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{ |
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list($uri, $links, $embedded, $data) = self::prepareJsonData($text); |
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$hal->setUri($uri)->setData($data); |
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self::addJsonLinkData($hal, $links); |
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if ($depth > 0) { |
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self::setEmbeddedResources($hal, $embedded, $depth); |
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} |
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$hal->setShouldStripAttributes(false); |
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return $hal; |
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} |
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/** |
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* @param string $text |
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*/ |
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private static function prepareJsonData($text) |
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{ |
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$data = json_decode($text, true); |
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if (json_last_error() != JSON_ERROR_NONE) { |
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throw new \RuntimeException('The $text parameter must be valid JSON'); |
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} |
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$uri = isset($data['_links']['self']['href']) ? $data['_links']['self']['href'] : ""; |
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unset ($data['_links']['self']); |
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$links = isset($data['_links']) ? $data['_links'] : array(); |
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unset ($data['_links']); |
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$embedded = isset($data['_embedded']) ? $data['_embedded'] : array(); |
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unset ($data['_embedded']); |
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return array($uri, $links, $embedded, $data); |
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} |
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/** |
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* @param Hal $hal |
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* @param array $links |
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*/ |
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private static function addJsonLinkData($hal, $links) |
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{ |
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foreach ($links as $rel => $links) { |
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if (!isset($links[0]) or !is_array($links[0])) { |
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$links = array($links); |
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} |
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foreach ($links as $link) { |
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$href = $link['href']; |
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unset($link['href']); |
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$hal->addLink($rel, $href, $link); |
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} |
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} |
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} |
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/** |
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* @param Hal $hal |
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* @param array $embedded |
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* @param integer $depth |
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*/ |
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private static function setEmbeddedResources(Hal $hal, $embedded, $depth) |
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{ |
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foreach ($embedded as $rel => $embed) { |
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$isIndexed = array_values($embed) === $embed; |
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$className = get_class($hal); |
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if (!$isIndexed) { |
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$hal->setResource($rel, self::fromJson(new $className, json_encode($embed), $depth - 1)); |
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} else { |
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foreach ($embed as $resource) { |
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$hal->addResource($rel, self::fromJson(new $className, json_encode($resource), $depth - 1)); |
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} |
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} |
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} |
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} |
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} |
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blongden /
hal
