/**
* Runs the SQL query associated with the update of the indexes affected
* by the move operation.
*
* @return int
*/
public function updateStructure()
{
list($a, $b, $c, $d) = $this->boundaries();
// select the rows between the leftmost & the rightmost boundaries and apply a lock
$this->applyLockBetween($a, $d);
$connection = $this->node->getConnection();
$grammar = $connection->getQueryGrammar();
$currentId = $this->quoteIdentifier($this->node->getKey());
$parentId = $this->quoteIdentifier($this->parentId());
$leftColumn = $this->node->getLeftColumnName();
$rightColumn = $this->node->getRightColumnName();
$parentColumn = $this->node->getParentColumnName();
$wrappedLeft = $grammar->wrap($leftColumn);
$wrappedRight = $grammar->wrap($rightColumn);
$wrappedParent = $grammar->wrap($parentColumn);
$wrappedId = $grammar->wrap($this->node->getKeyName());
$lftSql = "CASE\n WHEN {$wrappedLeft} BETWEEN {$a} AND {$b} THEN {$wrappedLeft} + {$d} - {$b}\n WHEN {$wrappedLeft} BETWEEN {$c} AND {$d} THEN {$wrappedLeft} + {$a} - {$c}\n ELSE {$wrappedLeft} END";
$rgtSql = "CASE\n WHEN {$wrappedRight} BETWEEN {$a} AND {$b} THEN {$wrappedRight} + {$d} - {$b}\n WHEN {$wrappedRight} BETWEEN {$c} AND {$d} THEN {$wrappedRight} + {$a} - {$c}\n ELSE {$wrappedRight} END";
$parentSql = "CASE\n WHEN {$wrappedId} = {$currentId} THEN {$parentId}\n ELSE {$wrappedParent} END";
$updateConditions = array($leftColumn => $connection->raw($lftSql), $rightColumn => $connection->raw($rgtSql), $parentColumn => $connection->raw($parentSql));
if ($this->node->timestamps) {
$updateConditions[$this->node->getUpdatedAtColumn()] = $this->node->freshTimestamp();
}
return $this->node->newNestedSetQuery()->where(function ($query) use($leftColumn, $rightColumn, $a, $d) {
$query->whereBetween($leftColumn, array($a, $d))->orWhereBetween($rightColumn, array($a, $d));
})->update($updateConditions);
}