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<?php |
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/** |
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* @author ventaquil <[email protected]> |
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* @licence MIT |
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*/ |
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namespace PHPAlgorithms\Dijkstra; |
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use PHPAlgorithms\Dijkstra\Exceptions\PathException; |
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use PHPAlgorithms\GraphTools\Traits\MagicGet; |
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class Path { |
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use MagicGet; |
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/** |
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* @var Point[] $nodes Added points to current path. |
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* @var integer $distance Distance of the path. |
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*/ |
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private $nodes = array(); |
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private $distance = 0; |
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/** |
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* Method adds node to end of current path. |
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* |
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* @param Point|integer $point Point object or point identifier. |
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* @param integer $distance Distance between this node and the last one in path. |
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* @return Path Reference to current object. |
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* @throws PathException Method throws exception when checkDistance() method throws exception. |
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*/ |
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public function addNode($point, $distance = 0) |
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{ |
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if ($point instanceof Point) { |
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$point = $point->id; |
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} |
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$this->nodes[] = $point; |
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$this->checkDistance($distance); |
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$this->distance += $distance; |
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return $this; |
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} |
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/** |
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* Method checks given $distance value. |
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* |
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* @param integer $distance |
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* @throws PathException Method throws exception when $distance is not numeric value or when $distance is less or equal to 0. |
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*/ |
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public function checkDistance($distance) |
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{ |
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if (!is_numeric($distance) && ($distance <= 0)) { |
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throw new PathException('Distance must be numeric value greater than 0'); |
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} |
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} |
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/** |
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* Method copy data of given Path object to current class instance. |
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* |
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* @param Path $path Path object whose data we want to copy. |
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* @return Path $this Reference to current object. |
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*/ |
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public function copy(self $path) |
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{ |
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$this->nodes = $path->nodes; |
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$this->distance = $path->distance; |
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return $this; |
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} |
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} |
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PHPAlgorithms /
Dijkstra-s-algorithm
