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<?php |
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namespace devgroup\JsTreeWidget\actions\nestedset; |
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use yii\base\Action; |
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use Yii; |
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use yii\db\ActiveRecord; |
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use yii\db\Expression; |
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use yii\web\Response; |
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class NodeMoveAction extends Action |
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{ |
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/** @var ActiveRecord */ |
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public $className; |
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public $rootAttribute = 'tree'; |
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public $leftAttribute = 'lft'; |
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public $rightAttribute = 'rgt'; |
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public $depthAttribute = 'depth'; |
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private $node; |
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private $parent; |
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public function init() |
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{ |
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//check for move node as root |
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//root reorder |
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//maybe move root to another root |
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} |
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public function run() |
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{ |
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Yii::$app->response->format = Response::FORMAT_JSON; |
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$newParentId = Yii::$app->request->post('parent'); |
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$oldParentId = Yii::$app->request->post('old_parent'); |
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$position = Yii::$app->request->post('position'); |
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$oldPosition = Yii::$app->request->post('old_position'); |
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$nodeId = Yii::$app->request->post('node_id'); |
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$siblings = Yii::$app->request->post('siblings', []); |
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$oldSiblings = Yii::$app->request->post('oldSiblings', []); |
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$class = $this->className; |
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if ((null === $node = $class::findOne($nodeId)) || (null === $parent = $class::findOne($newParentId))) { |
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return ['error' => 'Invalid data received']; |
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} |
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$this->node = $node; |
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$this->parent = $parent; |
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if ($newParentId == $oldParentId) { |
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return $this->reorder($oldPosition, $position, $siblings); |
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} else { |
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return $this->move($position, $siblings, $oldParentId); |
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} |
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} |
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public function reorder($oldPosition = null, $position = null, $siblings = []) |
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{ |
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if (null === $oldPosition || null === $position || true === empty($siblings)) { |
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return ['info' => 'nothing to change']; |
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} |
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$nodeId = $siblings[$position]; |
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$class = $this->className; |
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$lr = $workWith = []; |
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$nodeOperator = $siblingsOperator = ''; |
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if ($oldPosition > $position) { |
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//change next |
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$nodeOperator = '-'; |
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$siblingsOperator = '+'; |
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$workWith = array_slice($siblings, $position, $oldPosition - $position + 1); |
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} else if ($oldPosition < $position) { |
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//change previous |
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$nodeOperator = '+'; |
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$siblingsOperator = '-'; |
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$workWith = array_slice($siblings, $oldPosition, $position - $oldPosition + 1); |
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} else { |
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return ['info' => 'nothing to change']; |
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} |
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if (true === empty($workWith)) { |
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return ['info' => 'nothing to change']; |
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} |
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$lr = $workWithLr = $this->getLr($workWith); |
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if (true === empty($lr)) { |
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return ['info' => 'nothing to change']; |
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} |
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unset($workWithLr[$nodeId]); |
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$lft = array_column($workWithLr, $this->leftAttribute); |
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$lft = min($lft); |
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$rgt = array_column($workWithLr, $this->rightAttribute); |
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$rgt = max($rgt); |
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$nodeCondition = [ |
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'and', |
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['>=', $this->leftAttribute, $lft], |
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['<=', $this->rightAttribute, $rgt] |
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]; |
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$this->applyRootCondition($nodeCondition); |
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$nodeDelta = $this->getCount($nodeCondition); |
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$nodeDelta *= 2; |
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$siblingsCondition = [ |
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'and', |
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['>=', $this->leftAttribute, $lr[$nodeId][$this->leftAttribute]], |
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['<=', $this->rightAttribute, $lr[$nodeId][$this->rightAttribute]] |
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]; |
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$this->applyRootCondition($siblingsCondition); |
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$nodeChildren = $this->getChildIds($siblingsCondition); |
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$siblingsDelta = count($nodeChildren) * 2; |
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$db = Yii::$app->getDb(); |
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$transaction = $db->beginTransaction(); |
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try { |
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//updating necessary node siblings |
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$db->createCommand()->update( |
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$class::tableName(), |
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[ |
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$this->leftAttribute => new Expression($this->leftAttribute . sprintf('%s%d', $siblingsOperator, $siblingsDelta)), |
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$this->rightAttribute => new Expression($this->rightAttribute . sprintf('%s%d', $siblingsOperator, $siblingsDelta)), |
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], |
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$nodeCondition |
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)->execute(); |
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//updating node |
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$db->createCommand()->update( |
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$class::tableName(), |
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[ |
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$this->leftAttribute => new Expression($this->leftAttribute . sprintf('%s%d', $nodeOperator, $nodeDelta)), |
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$this->rightAttribute => new Expression($this->rightAttribute . sprintf('%s%d', $nodeOperator, $nodeDelta)), |
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], |
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['id' => $nodeChildren] |
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)->execute(); |
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$transaction->commit(); |
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} catch (\Exception $e) { |
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$transaction->rollBack(); |
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return ['error', $e->getMessage()]; |
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} |
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} |
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private function move($position = null, $siblings = [], $oldParentId) |
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{ |
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$class = $this->className; |
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if (null === $oldParent = $class::findOne($oldParentId)) { |
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return ['error' => "Old parent with id '{$oldParentId}' not found"]; |
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} |
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$nodeCountCondition = [ |
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'and', |
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['>=', $this->leftAttribute, $this->node{$this->leftAttribute}], |
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['<=', $this->rightAttribute, $this->node{$this->rightAttribute}] |
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]; |
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$this->applyRootCondition($nodeCountCondition); |
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$nodeChildren = $this->getChildIds($nodeCountCondition); |
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$siblingsDelta = count($nodeChildren) * 2; |
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if ($position == 0) { |
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$compareRight = $this->parent->{$this->leftAttribute} + 1; |
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} else { |
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if (false === isset($siblings[$position - 1])) { |
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return ['error' => 'New previous sibling not exists']; |
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} |
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$newPrevSiblingId = $siblings[$position - 1]; |
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$newPrevSiblingData = $this->getLr($newPrevSiblingId); |
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$compareRight = $newPrevSiblingData[$newPrevSiblingId][$this->rightAttribute]; |
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} |
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if ($this->node->{$this->leftAttribute} > $compareRight) { |
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//move node up |
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View Code Duplication |
if ($position == 0) { |
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$leftFrom = $this->parent->{$this->leftAttribute} + 1; |
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} else { |
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$leftFrom = $newPrevSiblingData[$newPrevSiblingId][$this->rightAttribute] + 1; |
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} |
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$rightTo = $this->node->{$this->leftAttribute}; |
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$nodeDelta = $this->node->{$this->leftAttribute} - $leftFrom; |
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$nodeOperator = '-'; |
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$parentOperator = $siblingsOperator = '+'; |
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$newParentUpdateField = $this->rightAttribute; |
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$oldParentUpdateField = $this->leftAttribute; |
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} else if ($this->node->{$this->leftAttribute} < $compareRight) { |
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//move node down |
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$leftFrom = $this->node->{$this->rightAttribute}; |
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View Code Duplication |
if ($position == 0) { |
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$rightTo = $this->parent->{$this->leftAttribute}; |
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} else { |
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$rightTo = $newPrevSiblingData[$newPrevSiblingId][$this->rightAttribute]; |
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} |
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$nodeOperator = '+'; |
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$parentOperator = $siblingsOperator = '-'; |
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$nodeDelta = $rightTo - $siblingsDelta + 1 - $this->node->{$this->leftAttribute}; |
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$newParentUpdateField = $this->leftAttribute; |
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$oldParentUpdateField = $this->rightAttribute; |
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} else { |
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return ['error' => 'There are two nodes with same "left" value. This should not be.']; |
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} |
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$siblingsCondition = [ |
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'and', |
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['>=', $this->leftAttribute, $leftFrom], |
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['<=', $this->rightAttribute, $rightTo] |
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]; |
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$this->applyRootCondition($siblingsCondition); |
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$db = Yii::$app->getDb(); |
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$transaction = $db->beginTransaction(); |
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$oldParentDepth = $oldParent->{$this->depthAttribute}; |
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$newParentDepth = $this->parent->{$this->depthAttribute}; |
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if ($newParentDepth < $oldParentDepth) { |
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$depthOperator = '-'; |
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$depthDelta = $oldParentDepth - $newParentDepth; |
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} else { |
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$depthOperator = '+'; |
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$depthDelta = $newParentDepth - $oldParentDepth; |
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} |
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$commonParentsCondition = [ |
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'and', |
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['<', $this->leftAttribute, $leftFrom], |
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['>', $this->rightAttribute, $rightTo] |
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]; |
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$this->applyRootCondition($commonParentsCondition); |
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$commonParentsIds = $class::find()->select('id')->where($commonParentsCondition)->column(); |
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$commonCondition = [ |
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['!=', $this->depthAttribute, 0], |
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['not in', 'id', $commonParentsIds], |
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]; |
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$this->applyRootCondition($commonCondition); |
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$newParentCondition = array_merge([ |
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'and', |
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['<=', $this->leftAttribute, $this->parent->{$this->leftAttribute}], |
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['>=', $this->rightAttribute, $this->parent->{$this->rightAttribute}], |
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], $commonCondition); |
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$oldParentsCondition = array_merge([ |
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'and', |
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['<', $this->leftAttribute, $this->node->{$this->leftAttribute}], |
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['>', $this->rightAttribute, $this->node->{$this->rightAttribute}], |
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], $commonCondition); |
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try { |
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//updating necessary node siblings |
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$db->createCommand()->update( |
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$class::tableName(), |
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[ |
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$this->leftAttribute => new Expression($this->leftAttribute . sprintf('%s%d', $siblingsOperator, $siblingsDelta)), |
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$this->rightAttribute => new Expression($this->rightAttribute . sprintf('%s%d', $siblingsOperator, $siblingsDelta)), |
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], |
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$siblingsCondition |
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)->execute(); |
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//updating old parents |
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$db->createCommand()->update( |
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$class::tableName(), |
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[ |
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//down - right |
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$oldParentUpdateField => new Expression($oldParentUpdateField . sprintf('%s%d', $parentOperator, $siblingsDelta)), |
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], |
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$oldParentsCondition |
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)->execute(); |
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245
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//updating new parents |
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$db->createCommand()->update( |
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$class::tableName(), |
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[ |
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249
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//down - left |
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$newParentUpdateField => new Expression($newParentUpdateField . sprintf('%s%d', $parentOperator, $siblingsDelta)), |
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251
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], |
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252
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$newParentCondition |
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)->execute(); |
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254
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//updating node with children |
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255
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$db->createCommand()->update( |
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256
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$class::tableName(), |
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257
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[ |
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258
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$this->leftAttribute => new Expression($this->leftAttribute . sprintf('%s%d', $nodeOperator, $nodeDelta)), |
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259
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$this->rightAttribute => new Expression($this->rightAttribute . sprintf('%s%d', $nodeOperator, $nodeDelta)), |
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260
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$this->depthAttribute => new Expression($this->depthAttribute . sprintf('%s%d', $depthOperator, $depthDelta)), |
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261
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], |
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262
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['id' => $nodeChildren] |
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263
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)->execute(); |
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264
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$transaction->commit(); |
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265
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} catch (\Exception $e) { |
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266
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$transaction->rollBack(); |
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return ['error', $e->getMessage()]; |
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} |
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} |
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270
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271
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/** |
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272
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* Returns field set of rows to be modified while reordering |
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273
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* |
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274
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* @param array $ids |
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275
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* @return array|\yii\db\ActiveRecord[] |
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276
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*/ |
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277
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private function getLr($ids) |
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278
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{ |
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279
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$class = $this->className; |
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280
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$lr = $class::find() |
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281
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->select(['id', $this->leftAttribute, $this->rightAttribute]) |
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282
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->where(['id' => $ids]) |
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283
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->indexBy('id') |
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284
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->asArray(true) |
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285
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->all(); |
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286
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return $lr; |
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287
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} |
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288
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289
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/** |
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290
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* Returns count of records to be modified while reordering |
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291
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* @param array $condition |
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292
|
|
|
* @return int|string |
|
293
|
|
|
*/ |
|
294
|
|
|
public function getCount($condition) |
|
295
|
|
|
{ |
|
296
|
|
|
$class = $this->className; |
|
297
|
|
|
$count = $class::find() |
|
298
|
|
|
->select(['id', $this->leftAttribute, $this->rightAttribute, $this->rootAttribute]) |
|
299
|
|
|
->where($condition) |
|
300
|
|
|
->count(); |
|
301
|
|
|
return $count; |
|
302
|
|
|
} |
|
303
|
|
|
|
|
304
|
|
|
private function getChildIds($condition) |
|
|
|
|
|
|
305
|
|
|
{ |
|
306
|
|
|
$class = $this->className; |
|
307
|
|
|
$count = $class::find() |
|
308
|
|
|
->select('id') |
|
309
|
|
|
->where($condition) |
|
310
|
|
|
->column(); |
|
311
|
|
|
return $count; |
|
312
|
|
|
} |
|
313
|
|
|
|
|
314
|
|
|
private function applyRootCondition(&$condition) |
|
315
|
|
|
{ |
|
316
|
|
|
if (false !== $this->rootAttribute) { |
|
317
|
|
|
$condition[] = [$this->rootAttribute => $this->node->{$this->rootAttribute}]; |
|
318
|
|
|
} |
|
319
|
|
|
} |
|
320
|
|
|
} |
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVarassignment in line 1 and the$higherassignment in line 2 are dead. The first because$myVaris never used and the second because$higheris always overwritten for every possible time line.