/**
* Add a new sub-item to the current item.
*
* @param string $name
* @param string|Closure $attributes
* @param Closure $callback
* @return void
*/
public function add($name, $attributes = null, $callback = null)
{
$item = new Item();
// Set the new item's parents.
if (!is_null($this->menu)) {
$item->setMenu($this->menu);
}
$item->setParent($this);
// Set the new item's attributes.
$item->name = $name;
if (!is_null($attributes)) {
// If the attributes is just a string, then it is the URL
// for the menu item.
if (is_string($attributes)) {
$item->url = $attributes;
} elseif ($attributes instanceof Closure) {
$attributes($item);
} else {
throw new \InvalidArgumentException();
}
}
if ($callback instanceof Closure) {
$callback($item);
}
$this->items[$name] = $item;
}
