/**
* Constructor.
*
* @param PartInterface[] $components compound parts
*/
public function __construct(array $components)
{
$this->componentCollection = new ObjectCollection($components);
$this->componentCollection->onChange([$this, 'requireTreeUpdate']);
$this->componentCollection->onItemRemove(function (PartInterface $item) {
$item->detach();
});
$this->componentCollection->onItemAdd(function (PartInterface $part) {
if ($this->hasComponent($part->getId())) {
$this->removeComponent($part->getId());
}
});
$this->initializeCollection([]);
$this->childrenInternal()->onItemAdd(function ($item) {
if ($item instanceof PartInterface && !$this->componentCollection->contains($item)) {
$this->componentCollection->add($item);
}
});
}
/**
* Returns collection containing all descendant nodes.
*
* @return CollectionInterface|ObjectCollection|ChildNodeInterface[]
*/
public function getChildrenRecursive()
{
$res = new ObjectCollection();
foreach ($this->children() as $child) {
$res->add($child);
if ($child instanceof ParentNodeInterface) {
$res->addMany($child->getChildrenRecursive());
}
}
return $res;
}
/**
* @return ObjectCollection
*/
public function parents()
{
$parents = new ObjectCollection();
$current = $this->parent();
while ($current instanceof ParentNodeInterface) {
$parents->add($current);
if (!$current instanceof ChildNodeInterface) {
break;
}
$current = $current->parent();
}
return $parents;
}
/**
* Adds component to collection.
*
* If component is already in collection, it will not be added twice.
*
* @param ChildNodeInterface $item
* @param bool $prepend Pass true to add component to the beginning of an array.
*
* @return $this
*/
public function add($item, $prepend = false)
{
if (!$item instanceof ChildNodeInterface) {
$details = is_object($item) ? get_class($item) : gettype($item);
throw new InvalidArgumentException("NodeCollection accepts only objects implementing ChildNodeInterface, {$details} given.");
}
$old = $item->parent();
if ($old === $this->parentNode) {
return $this;
} elseif ($old !== null) {
$item->detach();
}
$this->checkUnlocked($item);
parent::add($item, $prepend);
$item->internalSetParent($this->parentNode);
return $this;
}
