downgrade to kirby v3
This commit is contained in:
Philip Wagner
273
vendor/ml/json-ld/Graph.php
vendored
Normal file
273
vendor/ml/json-ld/Graph.php
vendored
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<?php
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/*
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* (c) Markus Lanthaler <mail@markus-lanthaler.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace ML\JsonLD;
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use ML\IRI\IRI;
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/**
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* A Graph represents a JSON-LD graph.
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*
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* @author Markus Lanthaler <mail@markus-lanthaler.com>
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*/
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class Graph implements GraphInterface, JsonLdSerializable
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{
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/**
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* @var DocumentInterface The document this graph belongs to.
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*/
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private $document;
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/**
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* @var array An associative array holding all nodes in the graph
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*/
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protected $nodes = array();
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/**
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* A term map containing terms/prefixes mapped to IRIs. This is similar
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* to a JSON-LD context but ignores all definitions except the IRI.
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*
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* @var array
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*/
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protected $termMap = array();
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/**
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* @var int Blank node counter
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*/
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private $blankNodeCounter = 0;
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/**
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* Constructor
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*
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* @param null|DocumentInterface $document The document the graph belongs to.
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*/
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public function __construct(DocumentInterface $document = null)
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{
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$this->document = $document;
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}
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/**
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* {@inheritdoc}
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*/
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public function createNode($id = null, $preserveBnodeId = false)
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{
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if (!is_string($id) || (!$preserveBnodeId && ('_:' === substr($id, 0, 2)))) {
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$id = $this->createBlankNodeId();
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} else {
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$id = (string) $this->resolveIri($id);
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if (isset($this->nodes[$id])) {
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return $this->nodes[$id];
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}
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}
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return $this->nodes[$id] = new Node($this, $id);
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}
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/**
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* {@inheritdoc}
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*/
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public function removeNode(NodeInterface $node)
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{
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if ($node->getGraph() === $this) {
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$node->removeFromGraph();
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}
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$id = $node->getId();
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if (!$node->isBlankNode()) {
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$id = (string) $this->resolveIri($id);
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}
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unset($this->nodes[$id]);
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return $this;
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}
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/**
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* {@inheritdoc}
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*/
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public function getNodes()
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{
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return array_values($this->nodes);
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}
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/**
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* {@inheritdoc}
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*/
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public function getNode($id)
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{
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if (!((strlen($id) >= 2) && ('_:' === substr($id, 0, 2)))) {
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$id = (string) $this->resolveIri($id);
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}
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return isset($this->nodes[$id])
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? $this->nodes[$id]
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: null;
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}
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/**
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* {@inheritdoc}
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*/
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public function getNodesByType($type)
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{
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if (is_string($type)) {
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if (null === ($type = $this->getNode($type))) {
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return array();
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}
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}
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return $type->getNodesWithThisType();
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}
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/**
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* {@inheritdoc}
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*/
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public function containsNode($id)
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{
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$node = $id;
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if ($node instanceof Node) {
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$id = $node->getId();
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}
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if ((null === $id) || !is_string($id)) {
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return false;
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}
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if ((strlen($id) >= 2) && ('_:' === substr($id, 0, 2))) {
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if (isset($this->nodes[$id]) && ($node === $this->nodes[$id])) {
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return true;
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}
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return false;
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}
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$id = (string) $this->resolveIri($id);
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return isset($this->nodes[$id]);
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}
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/**
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* {@inheritdoc}
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*/
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public function getDocument()
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{
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return $this->document;
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}
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/**
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* {@inheritdoc}
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*/
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public function removeFromDocument()
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{
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$doc = $this->document;
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$this->document = null;
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$doc->removeGraph($this);
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return $this;
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}
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/**
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* {@inheritdoc}
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*/
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public function merge(GraphInterface $graph)
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{
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$nodes = $graph->getNodes();
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$bnodeMap = array();
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foreach ($nodes as $node) {
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if ($node->isBlankNode()) {
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if (false === isset($bnodeMap[$node->getId()])) {
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$bnodeMap[$node->getId()] = $this->createNode();
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}
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$n = $bnodeMap[$node->getId()];
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} else {
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$n = $this->createNode($node->getId());
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}
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foreach ($node->getProperties() as $property => $values) {
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if (false === is_array($values)) {
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$values = array($values);
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}
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foreach ($values as $val) {
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if ($val instanceof NodeInterface) {
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// If the value is another node, we just need to
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// create a reference to the corresponding node
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// in this graph. The properties will be merged
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// in the outer loop
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if ($val->isBlankNode()) {
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if (false === isset($bnodeMap[$val->getId()])) {
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$bnodeMap[$val->getId()] = $this->createNode();
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}
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$val = $bnodeMap[$val->getId()];
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} else {
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$val = $this->createNode($val->getId());
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}
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} elseif (is_object($val)) {
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// Clone typed values and language-tagged strings
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$val = clone $val;
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}
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$n->addPropertyValue($property, $val);
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}
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}
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}
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return $this;
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}
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/**
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* {@inheritdoc}
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*/
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public function toJsonLd($useNativeTypes = true)
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{
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// Bring nodes into a deterministic order
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$nodes = $this->nodes;
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ksort($nodes);
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$nodes = array_values($nodes);
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$serializeNode = function ($node) use ($useNativeTypes) {
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return $node->toJsonLd($useNativeTypes);
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};
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return array_map($serializeNode, $nodes);
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}
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/**
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* Create a new blank node identifier unique to the document.
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*
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* @return string The new blank node identifier.
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*/
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protected function createBlankNodeId()
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{
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return '_:b' . $this->blankNodeCounter++;
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}
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/**
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* Resolves an IRI against the document's IRI
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*
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* If the graph isn't attached to a document or the document's IRI is
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* not set, the IRI is returned as-is.
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*
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* @param string|IRI $iri The (relative) IRI to resolve
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*
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* @return IRI The resolved IRI.
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*/
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protected function resolveIri($iri)
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{
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if (null === $this->document) {
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$base = new IRI();
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} else {
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$base = $this->document->getIri(true);
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}
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return $base->resolve($iri);
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}
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}
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