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<?php |
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namespace StefanoTree\NestedSet\MoveStrategy; |
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use StefanoTree\Exception; |
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class Top |
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extends MoveStrategyAbstract |
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{ |
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public function getNewParentId() |
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{ |
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return $this->getTargetNode()->getParentId(); |
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} |
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public function getLevelShift() |
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{ |
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return $this->getTargetNode()->getLevel() - $this->getSourceNode()->getLevel(); |
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} |
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public function getHoleLeftIndex() |
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{ |
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if ($this->isMovedToRoot() || $this->isMovedUp()) { |
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return $this->getSourceNode()->getLeft() + $this->getIndexShift(); |
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} elseif ($this->isMovedDown()) { |
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return $this->getSourceNode()->getLeft(); |
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} else { |
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throw new Exception\BaseException('Cannot move node'); |
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} |
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} |
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public function getHoleRightIndex() |
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{ |
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if ($this->isMovedToRoot() || $this->isMovedUp()) { |
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return $this->getSourceNode()->getRight() + $this->getIndexShift(); |
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} elseif ($this->isMovedDown()) { |
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return $this->getSourceNode()->getRight(); |
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} else { |
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throw new Exception\BaseException('Cannot move node'); |
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} |
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} |
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public function getSourceNodeIndexShift() |
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{ |
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if ($this->isMovedToRoot() || $this->isMovedUp()) { |
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return $this->getTargetNode()->getLeft() - $this->getSourceNode()->getRight() - 1; |
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} elseif ($this->isMovedDown()) { |
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return $this->getTargetNode()->getLeft() - $this->getSourceNode()->getLeft(); |
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} else { |
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throw new Exception\BaseException('Cannot move node'); |
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} |
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} |
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public function fixHoleFromIndex() |
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{ |
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if ($this->isMovedToRoot()) { |
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return $this->getSourceNode()->getRight() + $this->getIndexShift(); |
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} elseif ($this->isMovedUp()) { |
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return $this->getSourceNode()->getRight(); |
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} elseif ($this->isMovedDown()) { |
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return $this->getSourceNode()->getLeft(); |
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} else { |
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throw new Exception\BaseException('Cannot move node'); |
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} |
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} |
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public function makeHoleFromIndex() |
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{ |
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return $this->getTargetNode()->getLeft() - 1; |
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} |
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public function canMoveBranch() |
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{ |
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if (false == parent::canMoveBranch()) { |
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return false; |
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} |
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return ($this->getTargetNode()->isRoot()) ? |
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false : true; |
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} |
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public function isSourceNodeAtRequiredPosition() |
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{ |
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$sourceNode = $this->getSourceNode(); |
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$targetNode = $this->getTargetNode(); |
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return ($targetNode->getLeft() == ($sourceNode->getRight() + 1) && |
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$targetNode->getParentId() == $sourceNode->getParentId()) ? |
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true : false; |
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} |
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} |
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bartko-s /
stefano-tree
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