<?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.
*/

class FAWebCommand extends FANamedObserver {
	function execute(&$registry, &$request) {
		assert(FALSE);
	}
	
	function getObserverName() {
		assert(FALSE);
	}
	
	function notify(&$event) {
		$this->execute($event->getRegistry(), $event->getRequest());
	}
	
	//TODO:{[Anything needed here?[[FAWebCommand}
}

class FAConditionalWebCommandObserver extends FAObserver {
	var $_errors = array();
	
	function getErrors() {
		return $this->_errors;
	}
	
	function isValid() {
		return empty($this->_errors);
	}
	
	function notify(&$event) {
		$this->_errors[] = &$event;
	}
}

class FAConditionalWebCommand extends FAWebCommand {
	var $_validator;
	var $_success;
	var $_failure;
	
	function FAConditionalWebCommand($name, &$validator, &$success, &$failure) {
		parent::FAWebCommand($name);
		
		assert(is_a($validator, 'FAValidator'));
		assert(is_a($success, 'FAWebCommand'));
		assert(is_a($failure, 'FAWebCommand'));
		
		$this->_validator = &$validator;
		$this->_success = &$success;
		$this->_failure = &$failure;
	}
	
	function notify(&$event) {
		$observer = &new FAConditionalWebCommandObserver;
		
		$this->_validator->addObserver($observer);
		$this->_validator->run($event->getRequest);
						
		if ($observer->isValid()) {
			$ret = $this->_success->notify($event);
		} else {
			$registry = &$event->getRegistry();
			$registry->set('errors', $observer->getErrors());
			
			$ret = $this->_failure->notify($event);
		}
		
		return $ret;
	}
}

?>