
<?php

class AclBehavior extends ModelBehavior {

/**
 * Maps ACL type options to ACL models
 *
 * @var array
 * @access protected
 */

/**
 * Sets up the configuation for the model, and loads ACL models if they haven't been already
 *
 * @param mixed $config
 */
	function setup(&$model, $config = array()) {

		if (empty($config)) {
			$config = array('Aro');
		} 
		elseif (is_string($config)) {
			$config = array($config);
		}

		$this->settings[$model->name]['types'] = $config;

		foreach ($this->settings[$model->name]['types'] as $type)
		{
			if (!ClassRegistry::isKeySet($type)) {
				uses('model' . DS . 'db_acl');
				$object =& new $type();
			} else {
				$object =& ClassRegistry::getObject($type);
			}
			$model->{$type} =& $object;
		}
		

		if (!method_exists($model, 'parentNode')) {
			trigger_error("Callback parentNode() not defined in {$model->name}", E_USER_WARNING);
		}
	}
/**
 * Retrieves the Aro/Aco node for this model
 *
 * @param mixed $ref
 * @return array
 */
	function node(&$model, $type, $ref = null) {
		if (empty($ref)) {
			$ref = array('model' => $model->name, 'foreign_key' => $model->id);
		}
		return $model->{$type}->node($ref);
	}
/**
 * Creates a new ARO/ACO node bound to this record
 *
 * @param boolean $created True if this is a new record
 */
	function afterSave(&$model, $created) {
		if ($created) {

			foreach ($this->settings[$model->name]['types'] as $type)
			{
				if ($parent = $model->parentNode($type)) {
					$parent = $this->node($model, $type, $parent);
				} else {
					$parent = $model->{$type}->node($model->name);
				}
				$parent_id = Set::extract($parent, "0.{$type}.id");
			
				$model->{$type}->create();
				$model->{$type}->save(array(
					'parent_id'		=> $parent_id,
					'model'			=> $model->name,
					'foreign_key'	=> $model->id,
					'alias'			=> $model->name . "." . $model->id
				));
			}
		}
	}
/**
 * Destroys the ARO/ACO node bound to the deleted record
 *
 */
	function afterDelete(&$model) {
		foreach ($this->settings[$model->name]['types'] as $type)
		{
			$node = Set::extract($this->node($model, $type), "0.{$type}.id");
			if (!empty($node)) {
				$model->{$type}->delete($node);
			}
		}
	}
}

?>