<?php
/**
 *  Copyright (C) 2010  Kai Dorschner
 *
 *  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 3 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, see <http://www.gnu.org/licenses/>.
 *
 * @author Kai Dorschner <the-hide@address.com>
 * @copyright Copyright 2010, Kai Dorschner
 * @license http://www.gnu.org/licenses/gpl.html GPLv3
 * @package mocovi
 * @subpackage controls
 */

/**
 * Generic data processor.
 *
 * This is the base control for further data processing like shoutbox or guestbooks.
 *
 * @package mocovi
 * @subpackage controls
 */
class dataprocessor_control extends Control
{
	protected $defaultOptions = array();

	/**
	 * @override
	 */
	protected function program()
	{
		if(count($data = $this->dataProvider()->get()) > 0)
			foreach($data as $key => $value)
				ControlFactory::createVirtual('element', array())
					->load($this->node)
					->run()
					->appendChild
					( $this
						->dom
						->createTextNode($key.': '.$value)
					);
	}

	protected function dataProvider()
	{
		foreach($this->find('dataprovider') as $dataprovider)
			return $dataprovider; // Return first occuring dataprovider

		throw new MvcException('A dataProvider is obligatory and must be defined inside this dataprocessor element.');
	}
}