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<?php |
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namespace Algorithms\GraphTools; |
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class Creator |
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{ |
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private $points = array(); |
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private $labels = array(); |
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private static function checkPointID($point) |
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{ |
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if (is_int($point) && ($point > 0)) { |
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return 'int'; |
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} else { |
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return 'string'; |
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} |
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} |
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private function randNewID() |
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{ |
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do { |
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$rand = mt_rand(); |
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} while (isset($this->points[$rand])); |
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return $rand; |
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} |
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private function pointNotExists($point_id) |
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{ |
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if (!isset($this->points[$point_id])) { |
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return true; |
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} else { |
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throw new CreatorException('Point was added earlier'); |
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} |
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} |
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private function labelNotExists($label) |
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{ |
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if ($label != null) { |
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if (!isset($this->labels[$label])) { |
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return true; |
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} else { |
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throw new CreatorException('Label exists! Must be unique'); |
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} |
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} else { |
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return true; |
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} |
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} |
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private function createPointFromID($point_id, $label = null) |
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{ |
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if ($this->pointNotExists($point_id) && $this->labelNotExists($label)) { |
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if (empty($label)) { |
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$new_point = Point::create($point_id); |
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} else { |
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$this->labels[$label] = $point_id; |
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$new_point = Point::create($point_id, $label); |
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} |
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$this->points[$point_id] = $new_point; |
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return $new_point; |
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} |
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} |
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public function addPoint($point) |
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{ |
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if (Point::checkPoint($point)) { |
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return $this->addPointObject($point); |
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} elseif (self::checkPointID($point) == 'int') { |
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return self::createPointFromID($point); |
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} else { |
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return self::createPointFromID($this->randNewID(), $point); |
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} |
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} |
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private function addPointObject($object) |
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{ |
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$this->createPointFromID($object->getID(), $object->getLabel()); |
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return $object; |
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} |
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public function getPoint($point_id) |
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{ |
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try { |
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return $this->getPointOrFail($point_id); |
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} catch (PointException $e) { |
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return NULL; |
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} |
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} |
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public function getPointOrFail($point_id) |
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{ |
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if (isset($this->points[$point_id])) { |
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return $this->points[$point_id]; |
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} elseif (isset($this->labels[$point_id])) { |
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return $this->points[$this->labels[$point_id]]; |
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} else { |
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throw new PointException('Point not exists'); |
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} |
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} |
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103
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public function createConnections() |
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{ |
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$relations = array(); |
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107
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foreach ($this->points as $point_id => $point) { |
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$relations[$point_id] = $point->getDinstances(); |
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foreach ($relations[$point_id] as $array_to_analyze) { |
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if (!isset($relations[$array_to_analyze[0]])) { |
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$relations[$array_to_analyze[0]] = array(); |
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} |
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} |
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} |
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return $relations; |
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} |
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} |
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PHPAlgorithms /
GraphTools
