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<?php |
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/** |
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* NextFlow (http://github.com/nextflow) |
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* |
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* @link http://github.com/nextflow/nextflow-php for the canonical source repository |
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* @copyright Copyright (c) 2014-2016 NextFlow (http://github.com/nextflow) |
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* @license https://raw.github.com/nextflow/nextflow-php/master/LICENSE MIT |
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*/ |
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namespace NextFlow\Core\Serializer; |
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use NextFlow\Core\Scene\SceneInterface; |
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/** |
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* A serializer that serializes or unserializes a scene to JSON. |
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*/ |
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final class JsonSerializer implements SerializerInterface |
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{ |
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/** |
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* A map with id's that are serialized so we don't serialize a node twice. |
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* |
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* @var array |
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*/ |
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private $cachedIds; |
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/** |
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* A map with nodes that are serialized so we don't serialize a node twice. |
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* |
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* @var array |
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*/ |
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private $cachedNodes; |
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/** |
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* Initializes a new instance of this class. |
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*/ |
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public function __construct() |
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{ |
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$this->resetCache(); |
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} |
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/** |
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* Serializes the given scene. |
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* |
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* @param $scene The scene to serialize. |
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* @return string |
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*/ |
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public function serialize(SceneInterface $scene) |
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{ |
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$this->resetCache(); |
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$this->cacheNodes($scene->getEvents()); |
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$data = array(); |
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$data['type'] = get_class($scene); |
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$data['name'] = $scene->getName(); |
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$data['nodes'] = new \stdClass(); |
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$nodeIndex = 0; |
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foreach ($this->cachedNodes as $id => $node) { |
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$nodeSockets = new \stdClass(); |
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foreach ($node->getSockets() as $socketName => $socket) { |
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$nodes = array(); |
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foreach ($socket->getNodes() as $connectedNode) { |
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$nodes[] = $this->cachedIds[$connectedNode->getId()]; |
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} |
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$nodeSockets->$socketName = $nodes; |
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} |
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$data['nodes']->$nodeIndex = array( |
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'type' => get_class($node), |
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'parameters' => $node->getParams(), |
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'sockets' => $nodeSockets, |
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); |
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$nodeIndex++; |
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} |
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$data['events'] = array(); |
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foreach ($scene->getEvents() as $event) { |
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$data['events'][] = $this->cachedIds[$event->getId()]; |
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} |
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return json_encode($data); |
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} |
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/** |
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* Unserializes the given data. |
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* |
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* @param string $data The data to unserialize. |
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* @return SceneInterface |
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*/ |
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public function unserialize($data) |
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{ |
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$this->resetCache(); |
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$json = json_decode($data); |
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$scene = null; |
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if (isset($json->type)) { |
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$sceneClass = $json->type; |
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if (!class_exists($sceneClass)) { |
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throw new \RuntimeException('Invalid scene final class unserialized: ' . $sceneClass); |
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} |
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$scene = new $sceneClass(); |
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if (!$scene instanceof SceneInterface) { |
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throw new \RuntimeException(sprintf('The class %s should implement SceneInterface.', $sceneClass)); |
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} |
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$scene->setName($json->name); |
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foreach ($json->nodes as $nodeJson) { |
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$this->unserializeNode($nodeJson); |
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} |
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foreach ($json->nodes as $nodeId => $nodeJson) { |
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$this->unserializeConnections($nodeId, (array)$nodeJson->sockets); |
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} |
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foreach ($json->events as $eventId) { |
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$event = $this->cachedNodes[$eventId]; |
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$scene->addEvent($event); |
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} |
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} |
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$this->resetCache(); |
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return $scene; |
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} |
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/** |
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* Unserializes a node. |
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* |
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* @param array $json The json value to unserialize. |
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*/ |
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private function unserializeNode($json) |
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{ |
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$type = $json->type; |
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if ($type === 'NextFlow\\Core\\Event\\NamedEvent') { |
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$instance = new $type(null); |
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} else { |
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$instance = new $type(); |
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} |
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foreach ($json->parameters as $name => $value) { |
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$instance->setParam($name, $value); |
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} |
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$this->cachedNodes[] = $instance; |
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} |
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/** |
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* Unserializes the connections of the node with the given id. |
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* |
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* @param string $id The id of the node. |
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* @param array $sockets The sockets to unserialize. |
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*/ |
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private function unserializeConnections($id, array $sockets) |
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{ |
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foreach ($sockets as $socket => $nodes) { |
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foreach ($nodes as $nodeId) { |
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$connectedNode = $this->cachedNodes[$nodeId]; |
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$this->cachedNodes[$id]->bind($socket, $connectedNode); |
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} |
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} |
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} |
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/** |
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* Resets the internal cache. |
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*/ |
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private function resetCache() |
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{ |
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$this->cachedIds = array(); |
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$this->cachedNodes = array(); |
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} |
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/** |
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* Caches the given list with nodes. |
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* |
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* @param array $nodes A list with nodes to cache. |
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*/ |
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private function cacheNodes($nodes) |
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{ |
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foreach ($nodes as $node) { |
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$this->cachedIds[$node->getId()] = count($this->cachedIds); |
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$this->cachedNodes[] = $node; |
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foreach ($node->getSockets() as $socket) { |
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$this->cacheNodes($socket->getNodes()); |
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} |
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} |
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} |
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} |
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nextflow /
nextflow-php
