<?php 
/**
	 * Called with some arguments (name of default model, or model from var $uses),
	 * models with invalid data will populate data and validation errors into the session.
	 *
	 * Called without arguments, it will try to load data and validation errors from session 
	 * and attach them to proper models. Also merges $data to $this->data in controller.
	 * 
	 * @author poLK
	 * @author drayen aka Alex McFadyen
	 * 
	 * Licensed under The MIT License
	 * @license			http://www.opensource.org/licenses/mit-license.php The MIT License
	 */
	function _persistValidation() {
		$args = func_get_args();
		
		if (empty($args)) {
			if ($this->Session->check('Validation')) {
				$validation = $this->Session->read('Validation');
				$this->Session->del('Validation');
				foreach ($validation as $modelName => $sessData) {
					if ($this->name != $sessData['controller']){
						if (in_array($modelName, $this->modelNames)) {
							$Model =& $this->{$modelName};
						} elseif (ClassRegistry::isKeySet($modelName)) {
							$Model =& ClassRegistry::getObject($modelName);
						} else {
							continue;
						}
		
						$Model->data = $sessData['data'];
						$Model->validationErrors = $sessData['validationErrors'];
						$this->data = Set::merge($sessData['data'],$this->data);
					}
				}
			}
		} else {
			foreach($args as $modelName) {
				if (in_array($modelName, $this->modelNames) && !empty($this->{$modelName}->validationErrors)) {
						$this->Session->write('Validation.'.$modelName, array(
														'controller'			=>	$this->name,
														'data' 					=> $this->{$modelName}->data,
														'validationErrors' 	=> $this->{$modelName}->validationErrors
						));
				}
			}
		}
	}
?>