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<?php |
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declare(strict_types=1); |
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namespace loophp\phptree\Exporter; |
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use Fhaculty\Graph\Graph as OriginalGraph; |
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use Fhaculty\Graph\Vertex; |
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use loophp\phptree\Node\AttributeNodeInterface; |
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use loophp\phptree\Node\NodeInterface; |
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/** |
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* Class Graph. |
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*/ |
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final class Graph implements ExporterInterface |
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{ |
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/** |
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* The graph. |
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* |
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* @var \Fhaculty\Graph\Graph |
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*/ |
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private $graph; |
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/** |
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* {@inheritdoc} |
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*/ |
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public function export(NodeInterface $node): OriginalGraph |
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{ |
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$this->graph = new OriginalGraph(); |
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foreach ($node->all() as $node_visited) { |
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$vertexFrom = $this->createVertex($node_visited); |
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foreach ($node_visited->children() as $child) { |
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$vertexTo = $this->createVertex($child); |
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$vertexFrom->createEdgeTo($vertexTo); |
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} |
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} |
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return $this->getGraph(); |
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} |
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/** |
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* Create a vertex. |
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* |
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* @param NodeInterface $node |
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* The node |
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* |
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* @return Vertex |
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* A vertex |
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*/ |
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private function createVertex(NodeInterface $node): Vertex |
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{ |
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/** @var int $vertexId */ |
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$vertexId = $this->createVertexId($node); |
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if (!$this->getGraph()->hasVertex($vertexId)) { |
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$vertex = $this->getGraph()->createVertex($vertexId); |
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$vertex->setAttribute( |
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'graphviz.label', |
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$node->label() |
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); |
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if ($node instanceof AttributeNodeInterface) { |
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foreach ($node->getAttributes() as $key => $value) { |
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$vertex->setAttribute((string) $key, $value); |
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} |
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} |
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} |
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return $this->getGraph()->getVertex($vertexId); |
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} |
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/** |
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* Create a vertex ID. |
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* |
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* @param NodeInterface $node |
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* The node |
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* |
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* @return string |
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* A vertex ID |
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*/ |
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private function createVertexId(NodeInterface $node): string |
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{ |
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return sha1(spl_object_hash($node)); |
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} |
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private function getGraph(): OriginalGraph |
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{ |
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return $this->graph; |
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} |
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} |
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loophp /
phptree
