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<?php |
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/****************************************************************************** |
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* An implementation of dicto (scg.unibe.ch/dicto) in and for PHP. |
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* |
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* Copyright (c) 2016 Richard Klees <[email protected]> |
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* |
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* This software is licensed under The MIT License. You should have received |
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* a copy of the license along with the code. |
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*/ |
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namespace Lechimp\Dicto\Graph; |
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/** |
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* A node in the graph. It has an id to make it identifiable. It also |
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* has some relations to other nodes. |
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*/ |
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class Node extends Entity { |
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/** |
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* @var int |
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*/ |
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private $id; |
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/** |
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* @var Relation[] |
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*/ |
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private $relations = []; |
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/** |
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* @param int $id |
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* @param string $type |
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* @param array<string,mixed> $properties |
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*/ |
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public function __construct($id, $type, array $properties) { |
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assert('is_int($id)'); |
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$this->id = $id; |
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parent::__construct($type, $properties); |
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} |
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/** |
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* Get the id. |
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* |
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* @return int |
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*/ |
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public function id() { |
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return $this->id; |
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} |
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/** |
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* Add a relation from this graph to another. |
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* |
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* @param string $type |
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* @param array<string,mixed> $properties |
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* @param Node $other |
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* @return Relation |
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*/ |
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public function add_relation($type, array $properties, Node $other) { |
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$rel = $this->build_relation($type, $properties, $other); |
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$this->relations[] = $rel; |
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return $rel; |
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} |
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protected function build_relation($type, array $properties, $other) { |
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return new Relation($type, $properties, $other); |
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} |
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/** |
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* Get the relations to other nodes. |
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* |
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* @param \Closure|null $filter |
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* @return Relation[] |
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*/ |
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public function relations(\Closure $filter = null) { |
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if ($filter !== null) { |
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return array_values(array_filter($this->relations, $filter)); |
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} |
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else { |
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return $this->relations; |
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} |
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} |
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/** |
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* Get all related nodes, where relations might be filtered. |
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* |
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* @param \Closure|null $filter |
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* @return Node[] |
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*/ |
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public function related_nodes(\Closure $filter = null) { |
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$filtered = $this->relations($filter); |
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$get_node = function($r) { return $r->target(); }; |
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return array_values(array_map($get_node, $filtered)); |
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} |
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} |
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lechimp-p /
dicto.php
