<?php

/*
FileArts
Copyright (C) 2007 Peter Goodman, Geoffrey Goodman

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/

if (!defined('FILEARTS')) {
	trigger_error("This file depends upon filearts being loaded", E_USER_ERROR);
}
 
require_once FA_BASE_DIR . '/validator/criteria.php';

class FAFailedCriteriaEvent extends FAObservableEvent {
	var $_criteria;
	
	function FAFailedCriteriaEvent(&$criteria) {
		$this->_criteria = &$criteria;
	}
	
	function &getCriteria() {
		return $this->_criteria;
	}
}

class FAFailedCriteriaObserver extends FAObserver {
	var $_errors = array();
	
	function getErrors() {
		return $this->_errors;
	}
	
	function isValid() {
		return empty($this->_errors);
	}
	
	function notify(&$event) {
		$this->_errors[] = &$event;
	}
}

class FAValidator extends FAObserver {
	var $_criteria = array();
	var $_dispatcher;
	
	function FAValidator() {
		$this->_dispatcher = &new FADispatcher;
		$this->addObserver($this);
	}
	
	function addCriteria(&$criteria) {
		assert(is_a($criteria, 'FACriteria'));
		
		$this->_criteria[] = &$criteria;
	}
	
	function addObserver(&$observer) {
		$this->_dispatcher->addObserver($observer);
	}
	
	function notify(&$event) {
	}
	
	//TODO:{[$table is a bad name, change it![run[FAValidator}
	function run(&$table) {
		$it = &new FAArrayIterator($this->_criteria);
		
		while ($it->next()) {
			$criteria = &$it->current();
			
			if ($criteria->validate($table, $this->_dispatcher))
				break;
		}
	}
}

?>