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<?php |
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namespace Graphp\Graph\Builder; |
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use InvalidArgumentException; |
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use Graphp\Graph\DefaultGraphType; |
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use Graphp\Graph\GraphTypeInterface; |
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/** |
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* class GraphTypeBuilder |
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* |
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* @package Graphp\Graph\Builder |
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*/ |
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class GraphTypeBuilder |
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{ |
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private $directed; |
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private $undirected; |
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private $allowSelfLoops; |
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private $allowMultipleEdges; |
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private $weighted; |
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private $allowCycles; |
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private $modifiable; |
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/** |
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* Construct a new graph type |
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* |
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* @param GraphTypeInterface $type - the graph type |
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* @param bool $directed - is graph directed |
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* @param bool $undirected - is graph undirected |
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*/ |
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public function __construct(?GraphTypeInterface $type = null, ?bool $directed = null, ?bool $undirected = null) |
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{ |
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if (!is_null($type)) { |
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$this->directed = $type->isDirected() || $type->isMixed(); |
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$this->undirected = $type->isUndirected() || $type->isMixed(); |
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$this->allowSelfLoops = $type->isAllowingSelfLoops(); |
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$this->allowMultipleEdges = $type->isAllowingMultipleEdges(); |
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$this->weighted = $type->isWeighted(); |
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$this->allowCycles = $type->isAllowingCycles(); |
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$this->modifiable = $type->isModifiable(); |
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} elseif (!is_null($directed) && !is_null($undirected)) { |
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if (!$directed && !$undirected) { |
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throw new InvalidArgumentException("At least one of directed or undirected must be true"); |
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} |
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$this->directed = $directed; |
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$this->undirected = $undirected; |
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$this->allowSelfLoops = true; |
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$this->allowMultipleEdges = true; |
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$this->weighted = false; |
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$this->allowCycles = true; |
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$this->modifiable = true; |
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} else { |
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$this->directed = false; |
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$this->undirected = true; |
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$this->allowSelfLoops = true; |
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$this->allowMultipleEdges = true; |
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$this->weighted = false; |
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$this->allowCycles = true; |
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$this->modifiable = true; |
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} |
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} |
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/** |
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* Set the type as directed. |
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* |
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* @return self |
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*/ |
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public function directed(): self |
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{ |
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$this->directed = true; |
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$this->undirected = false; |
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return $this; |
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} |
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/** |
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* Set the type as undirected. |
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* |
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* @return self |
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*/ |
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public function undirected(): self |
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{ |
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$this->directed = false; |
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$this->undirected = true; |
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return $this; |
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} |
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/** |
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* Set the type as mixed. |
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* |
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* @return self |
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*/ |
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public function mixed(): self |
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{ |
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$this->directed = true; |
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$this->undirected = true; |
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return $this; |
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} |
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/** |
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* Set whether to allow self-loops. |
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* |
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* @param bool $value - if to allow self loops |
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* |
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* @return self |
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*/ |
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public function allowSelfLoops(bool $value): self |
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{ |
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$this->allowSelfLoops = $value; |
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return $this; |
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} |
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/** |
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* Set whether to allow multiple edges. |
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* |
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* @param bool $value - if to allow multiple edges |
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* |
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* @return self |
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*/ |
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public function allowMultipleEdges(bool $value): self |
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{ |
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$this->allowMultipleEdges = $value; |
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return $this; |
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} |
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/** |
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* Set whether the graph is weighted. |
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* |
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* @param bool $value - if graph is weighted |
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* |
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* @return self |
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*/ |
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public function weighted(?bool $value = null): self |
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{ |
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$this->weighted = $value ?? false; |
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return $this; |
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} |
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/** |
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* Set whether to allow cycles. |
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* |
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* @param bool $value - if to allow cycles |
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* |
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* @return self |
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*/ |
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public function allowCycles(bool $value): self |
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{ |
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$this->allowCycles = $value; |
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return $this; |
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} |
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/** |
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* Set whether the graph is modifiable. |
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* |
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* @param bool $value - if graph is modifiable |
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* |
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* @return self |
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*/ |
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public function modifiable(bool $value): self |
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{ |
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$this->modifiable = $value; |
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return $this; |
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} |
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/** |
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* Build the graph type |
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* |
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* @return GraphTypeInterface |
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*/ |
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public function build(): GraphTypeInterface |
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{ |
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return new DefaultGraphType( |
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$this->directed, |
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$this->undirected, |
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$this->allowSelfLoops, |
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$this->allowMultipleEdges, |
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$this->weighted, |
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$this->allowCycles, |
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$this->modifiable |
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); |
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} |
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} |
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bingo-soft /
graphp
