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<?php |
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class Nestedset_Model_Builder |
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{ |
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/** |
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* Add an element to the end of the tree. |
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* |
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* @param $model|NestedSet_Model Nested set model |
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* @param $name|string Name of the element |
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* @param $reference|int Id of the reference element |
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* |
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* @return $this |
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*/ |
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public function append(NestedSet_Model $nestedset, $name) |
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{ |
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$db = $nestedset->getDb(); |
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$select = $db->select(); |
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$select->from($nestedset->getTableName(), array('max' => "MAX({$nestedset->getStructureRight()})")); |
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$stmt = $db->query($select); |
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$result = $stmt->fetch(); |
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if (false === $result) { |
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$result = 0; |
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} else { |
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$result = $result['max']; |
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} |
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$left = $result + 1; |
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$right = $result + 2; |
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try { |
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$db->beginTransaction(); |
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// insert at the end of the nest |
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$values = array( |
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$nestedset->getStructureName() => $name, |
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$nestedset->getStructureLeft() => $left, |
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$nestedset->getStructureRight() => $right, |
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); |
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$db->insert($nestedset->getTableName(), $values); |
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$db->commit(); |
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} catch (Exception $e) { |
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$db->rollBack(); |
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throw $e; |
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} |
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return $this; |
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} |
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/** |
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* Add an element into another as its child. |
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* |
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* @param $model|NestedSet_Model Nested set model |
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* @param $name|string Name of the element |
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* @param $reference|int Id of the reference element |
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* |
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* @return $this |
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*/ |
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public function addInto(NestedSet_Model $nestedset, $name, $reference) |
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{ |
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$db = $nestedset->getDb(); |
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// get parent's right value |
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$select = $db->select(); |
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$select->from($nestedset->getTableName(), $nestedset->getStructureRight()); |
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$select->where("{$nestedset->getStructureId()} = $reference"); |
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$stmt = $db->query($select); |
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$result = $stmt->fetch(); |
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$right = $result[$nestedset->getStructureRight()]; |
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try { |
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$db->beginTransaction(); |
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// move next elements' right to make room |
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$db->query(" |
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UPDATE {$nestedset->getTableName()} |
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SET {$nestedset->getStructureRight()} = {$nestedset->getStructureRight()} + 2 |
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WHERE {$nestedset->getStructureRight()} > $right; |
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"); |
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// move next elements' left |
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$db->query(" |
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UPDATE {$nestedset->getTableName()} |
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SET {$nestedset->getStructureLeft()} = {$nestedset->getStructureLeft()} + 2 |
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WHERE {$nestedset->getStructureLeft()} > $right; |
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"); |
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// make room into parent element |
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$db->query(" |
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UPDATE {$nestedset->getTableName()} |
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SET {$nestedset->getStructureRight()} = {$nestedset->getStructureRight()} + 2 |
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WHERE {$nestedset->getStructureId()} = :reference; |
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", array( |
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'reference' => $reference, |
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)); |
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// insert new element |
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$values = array( |
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$nestedset->getStructureName() => $name, |
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$nestedset->getStructureLeft() => $right, |
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$nestedset->getStructureRight() => $right + 1, |
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); |
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$db->insert($nestedset->getTableName(), $values); |
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$db->commit(); |
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} catch (Exception $e) { |
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$db->rollBack(); |
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throw $e; |
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} |
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return $this; |
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} |
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/** |
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* Move an element into another as its child. |
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* |
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* @param $model|NestedSet_Model Nested set model |
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* @param $element|array Element to move |
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* @param $reference|array Reference element to move into |
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* |
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* @return $this |
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*/ |
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public function moveInto(NestedSet_Model $nestedset, array $element, array $reference) |
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{ |
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$db = $nestedset->getDb(); |
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try { |
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// Check it can be moved into. XXX change when we'll get one level |
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if ($element[0][$nestedset->getStructureLeft()] > $reference[0][$nestedset->getStructureLeft()] && |
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$element[0][$nestedset->getStructureLeft()] < $reference[0][$nestedset->getStructureRight()]) { |
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// already into |
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return false; |
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} |
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$db->beginTransaction(); |
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// first make room into reference |
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// @TODO make a protected method to make room |
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// with must always be a pair number |
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$elementWidth = $nestedset->getNodeWidth($element[0][$nestedset->getStructureId()]); |
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// move right |
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$referenceRight = $reference[0][$nestedset->getStructureRight()]; |
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$db->query(" |
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UPDATE {$nestedset->getTableName()} |
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SET {$nestedset->getStructureRight()} = {$nestedset->getStructureRight()} + $elementWidth |
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WHERE {$nestedset->getStructureRight()} >= $referenceRight; |
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"); |
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// move left |
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$db->query(" |
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UPDATE {$nestedset->getTableName()} |
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SET {$nestedset->getStructureLeft()} = {$nestedset->getStructureLeft()} + $elementWidth |
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WHERE {$nestedset->getStructureLeft()} > $referenceRight; |
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"); |
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// then move element (and it's children) |
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$element = $nestedset->getElement($element[0][$nestedset->getStructureId()]); |
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$elementIds = array(); |
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foreach ($element as $one) { |
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array_push($elementIds, $one[$nestedset->getStructureId()]); |
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} |
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$elementIds = implode(', ', $elementIds); |
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$difference = $reference[0][$nestedset->getStructureRight()] - $element[0][$nestedset->getStructureLeft()]; |
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$db->query(" |
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UPDATE {$nestedset->getTableName()} |
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SET {$nestedset->getStructureLeft()} = {$nestedset->getStructureLeft()} + $difference, |
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{$nestedset->getStructureRight()} = {$nestedset->getStructureRight()} + $difference |
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WHERE {$nestedset->getStructureId()} IN ($elementIds); |
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"); |
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// move what was on the right of the element |
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$db->query(" |
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UPDATE {$nestedset->getTableName()} |
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SET {$nestedset->getStructureLeft()} = {$nestedset->getStructureLeft()} - $elementWidth |
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WHERE {$nestedset->getStructureLeft()} > {$element[0][$nestedset->getStructureLeft()]}; |
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"); |
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$db->query(" |
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UPDATE {$nestedset->getTableName()} |
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SET {$nestedset->getStructureRight()} = {$nestedset->getStructureRight()} - $elementWidth |
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WHERE {$nestedset->getStructureRight()} > {$element[0][$nestedset->getStructureRight()]}; |
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"); |
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$db->commit(); |
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} catch (Exception $e) { |
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$db->rollBack(); |
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throw $e; |
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} |
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} |
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/** |
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* Recursively delete a node, with all its children |
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* |
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* @param $model|NestedSet_Model Nested set model |
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* @param $tree|array |
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* |
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* @return $this |
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*/ |
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public function deleteRecursive(NestedSet_Model $nestedset, array $tree) |
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{ |
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$db = $nestedset->getDb(); |
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// get interval for recursive delete |
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$left = (int) $tree[$nestedset->getStructureLeft()]; |
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$right = (int) $tree[$nestedset->getStructureRight()]; |
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try { |
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$db->beginTransaction(); |
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$delete = $db->delete($nestedset->getTableName(), "{$nestedset->getStructureLeft()} BETWEEN $left AND $right"); |
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// update other elements |
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$width = $right - $left + 1; |
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// update right |
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$db->query(" |
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UPDATE {$nestedset->getTableName()} |
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SET {$nestedset->getStructureRight()} = {$nestedset->getStructureRight()} - $width |
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WHERE {$nestedset->getStructureRight()} > $right |
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"); |
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// update left |
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$db->query(" |
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UPDATE {$nestedset->getTableName()} |
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SET {$nestedset->getStructureLeft()} = {$nestedset->getStructureLeft()} - $width |
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WHERE {$nestedset->getStructureLeft()} > $right |
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"); |
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$db->commit(); |
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} catch (Exception $e) { |
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$db->rollBack(); |
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throw $e; |
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} |
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return $this; |
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} |
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245
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/** |
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246
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* Delete a node, but move all its children outside first |
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247
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* |
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248
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* @param $model|NestedSet_Model Nested set model |
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249
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* @param $tree|array |
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250
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* |
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* @return $this |
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252
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*/ |
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253
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public function deleteNonRecursive(NestedSet_Model $nestedset, array $tree) |
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254
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{ |
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255
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$db = $nestedset->getDb(); |
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256
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257
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$left = (int) $tree[$nestedset->getStructureLeft()]; |
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$right = (int) $tree[$nestedset->getStructureRight()]; |
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260
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try { |
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261
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$db->beginTransaction(); |
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262
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263
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$delete = $db->delete($nestedset->getTableName(), "{$nestedset->getStructureId()} = {$tree[$nestedset->getStructureId()]}"); |
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264
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265
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// update other elements |
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$width = 2; |
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267
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268
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// update right for inner elements |
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269
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$db->query(" |
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270
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UPDATE {$nestedset->getTableName()} |
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SET {$nestedset->getStructureRight()} = {$nestedset->getStructureRight()} - 1 |
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272
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WHERE {$nestedset->getStructureLeft()} > $left AND {$nestedset->getStructureRight()} < $right |
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"); |
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275
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// update left for inner elements |
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276
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$db->query(" |
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277
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UPDATE {$nestedset->getTableName()} |
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278
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SET {$nestedset->getStructureLeft()} = {$nestedset->getStructureLeft()} - 1 |
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279
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WHERE {$nestedset->getStructureLeft()} > $left AND {$nestedset->getStructureRight()} < $right |
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280
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"); |
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281
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282
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// update right for outer elements |
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283
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$db->query(" |
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284
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UPDATE {$nestedset->getTableName()} |
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285
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SET {$nestedset->getStructureRight()} = {$nestedset->getStructureRight()} - $width |
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286
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WHERE {$nestedset->getStructureRight()} > $right |
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287
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"); |
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288
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289
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// update left for outer elements |
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290
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$db->query(" |
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291
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UPDATE {$nestedset->getTableName()} |
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292
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SET {$nestedset->getStructureLeft()} = {$nestedset->getStructureLeft()} - $width |
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293
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WHERE {$nestedset->getStructureLeft()} > $left AND {$nestedset->getStructureRight()} >= $right |
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294
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"); |
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295
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296
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$db->commit(); |
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297
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} catch (Exception $e) { |
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298
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$db->rollBack(); |
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299
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throw $e; |
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300
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} |
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301
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302
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return $this; |
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303
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} |
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304
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} |
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305
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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.