/**
* @throws Exception
*/
public function beforeUpdate()
{
if ($this->node !== null && !$this->node->getIsNewRecord()) {
$this->node->refresh();
}
switch ($this->operation) {
case self::OPERATION_MAKE_ROOT:
if ($this->treeAttribute === false) {
throw new Exception('Can not move a node as the root when "treeAttribute" is false.');
}
if ($this->owner->isRoot()) {
throw new Exception('Can not move the root node as the root.');
}
break;
case self::OPERATION_INSERT_BEFORE:
case self::OPERATION_INSERT_AFTER:
if ($this->node->isRoot()) {
throw new Exception('Can not move a node when the target node is root.');
}
case self::OPERATION_PREPEND_TO:
case self::OPERATION_APPEND_TO:
if ($this->node->getIsNewRecord()) {
throw new Exception('Can not move a node when the target node is new record.');
}
if ($this->owner->equals($this->node)) {
throw new Exception('Can not move a node when the target node is same.');
}
if ($this->node->isChildOf($this->owner)) {
throw new Exception('Can not move a node when the target node is child.');
}
}
}
/**
* @param bool $forInsertNear
* @throws Exception
*/
protected function checkNode($forInsertNear = false)
{
if ($forInsertNear && $this->node->isRoot()) {
throw new Exception('Can not move a node before/after root.');
}
if ($this->node->getIsNewRecord()) {
throw new Exception('Can not move a node when the target node is new record.');
}
if ($this->owner->equals($this->node)) {
throw new Exception('Can not move a node when the target node is same.');
}
if ($this->checkLoop && $this->node->isChildOf($this->owner)) {
throw new Exception('Can not move a node when the target node is child.');
}
}
/**
* @param int $to
* @param int $depth
* @throws Exception
*/
protected function insertNode($to, $depth = 0)
{
if ($this->node->getIsNewRecord()) {
throw new Exception('Can not create a node when the target node is new record.');
}
if ($depth === 0 && $this->node->isRoot()) {
throw new Exception('Can not insert a node before/after root.');
}
$this->owner->setAttribute($this->leftAttribute, $to);
$this->owner->setAttribute($this->rightAttribute, $to + 1);
$this->owner->setAttribute($this->depthAttribute, $this->node->getAttribute($this->depthAttribute) + $depth);
if ($this->treeAttribute !== null) {
$this->owner->setAttribute($this->treeAttribute, $this->node->getAttribute($this->treeAttribute));
}
$this->shift($to, null, 2);
}
/**
* @throws Exception
*/
public function beforeUpdate()
{
if ($this->node !== null && !$this->node->getIsNewRecord()) {
$this->node->refresh();
}
switch ($this->operation) {
case self::OPERATION_MAKE_ROOT:
if ($this->treeAttribute === false) {
throw new Exception('Can not move a node as the root when "treeAttribute" is false.');
}
if ($this->owner->isRoot()) {
throw new Exception('Can not move the root node as the root.');
}
if (!$this->treeAttributeById) {
if ($this->owner->getOldAttribute($this->treeAttribute) === $this->owner->getAttribute($this->treeAttribute)) {
throw new Exception('Can not move a node as the root when its tree attribute "' . $this->treeAttribute . '" is not changed.');
}
if ($this->owner->find()->andWhere([$this->treeAttribute => $this->owner->getAttribute($this->treeAttribute), $this->leftAttribute => 1])->one()) {
throw new Exception('Can not move a node as the root when another root with this "' . $this->treeAttribute . '" already exists.');
}
}
break;
case self::OPERATION_INSERT_BEFORE:
case self::OPERATION_INSERT_AFTER:
if ($this->node->isRoot()) {
throw new Exception('Can not move a node when the target node is root.');
}
case self::OPERATION_PREPEND_TO:
case self::OPERATION_APPEND_TO:
if ($this->node->getIsNewRecord()) {
throw new Exception('Can not move a node when the target node is new record.');
}
if ($this->owner->equals($this->node)) {
throw new Exception('Can not move a node when the target node is same.');
}
if ($this->node->isChildOf($this->owner)) {
throw new Exception('Can not move a node when the target node is child.');
}
}
}