<?php
/**
 * A TCP protocol resolver class
 *
 * @author		Roland Haeder <webmaster@shipsimu.org>
 * @version		0.0.0
 * @copyright	Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2014 Hub Developer Team
 * @license		GNU GPL 3.0 or any newer version
 * @link		http://www.shipsimu.org
 *
 * 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/>.
 */
class TcpProtocolResolver extends BaseProtocolResolver implements ProtocolResolver, Registerable {
	/**
	 * Protected constructor
	 *
	 * @return	void
	 */
	protected function __construct () {
		// Call parent constructor
		parent::__construct(__CLASS__);

		// Set protocol type
		$this->setProtocolName('tcp');
	}

	/**
	 * Creates an instance of a TCP protocol resolver
	 *
	 * @return	$resolverInstance	The prepared command resolver instance
	 */
	public static final function createTcpProtocolResolver () {
		// Create the new instance
		$resolverInstance = new TcpProtocolResolver();

		// Return the prepared instance
		return $resolverInstance;
	}

	/**
	 * Returns an instance of a LocateableNode class for a given NodeHelper
	 * instance or null if it was not found.
	 *
	 * @param	$nodeInstance	An instance of a NodeHelper class
	 * @return	$unlInstance	An instance of a LocateableNode class
	 * @todo	0% done
	 */
	public function resolveUniversalNodeLocatorFromNodeHelper (NodeHelper $nodeInstance) {
		// Get result instance
		$resultInstance = $nodeInstance->getResultInstance();

		// Make sure the result instance is valid
		assert($resultInstance instanceof SearchableResult);

		// Rewind iterator
		$resultInstance->rewind();

		// Lookup node's id
		while ($resultInstance->next()) {
			// Get current entry
			$current = $resultInstance->current();

			// Do we have found an entry?
			// $nodeInstance->getNodeId()
			die(print_r($current, TRUE));
		} // END - while
	}

	/**
	 * Returns the UNL as string from given configuration key.
	 *
	 * @param	$configKey	Configuration key for UNL address (valid: internal,external)
	 * @return	$unl		Universal node locator
	 */
	public function resolveUniversalNodeLocatorFromConfigKey ($configKey) {
		// Put all together
		$unl = sprintf('%s://%s:%s',
			$this->getProtocolName(),
			$this->getConfigInstance()->getConfigEntry($configKey . '_address'),
			$this->getConfigInstance()->getConfigEntry('node_listen_port')
		);

		/*
		 * And return it. Please note that e.g. a FaxProtocolResolver will
		 * return a different UNL and therefore all protocol resolvers must do
		 * it on their own way.
		 */
		return $unl;
	}
}

// [EOF]
?>