<?php
/**
 * A PackageDecoder node-task
 *
 * @author		Roland Haeder <webmaster@ship-simu.org>
 * @version		0.0.0
 * @copyright	Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2012 Hub Developer Team
 * @license		GNU GPL 3.0 or any newer version
 * @link		http://www.ship-simu.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 NodePackageDecoderTask extends BaseTask implements Taskable, Visitable {
	/**
	 * Protected constructor
	 *
	 * @return	void
	 */
	protected function __construct () {
		// Call parent constructor
		parent::__construct(__CLASS__);
	}

	/**
	 * Creates an instance of this class
	 *
	 * @return	$taskInstance	An instance of a Visitable class
	 */
	public final static function createNodePackageDecoderTask () {
		// Get new instance
		$taskInstance = new NodePackageDecoderTask();

		// Get a chunk handler instance
		$handlerInstance = ChunkHandlerFactory::createChunkHandlerInstance();

		// Get the stacker from it, we don't need the handler here
		$stackerInstance = $handlerInstance->getStackerInstance();

		// Get a decoder instance
		$decoderInstance = ObjectFactory::createObjectByConfiguredName('package_decoder_class', array($stackerInstance));

		// ... and also set the decoder instance here
		$taskInstance->setDecoderInstance($decoderInstance);

		// Return the prepared instance
		return $taskInstance;
	}

	/**
	 * Accepts the visitor to process the visitor
	 *
	 * @param	$visitorInstance	An instance of a Visitor class
	 * @return	void
	 */
	public function accept (Visitor $visitorInstance) {
		// Visit this task
		$visitorInstance->visitTask($this);
	}

	/**
	 * Executes the task
	 *
	 * @return	void
	 */
	public function executeTask () {
		// Check if the stacker has some entries left
		if ($this->getDecoderInstance()->ifUnhandledRawPackageDataLeft()) {
			// Then handle it
			$this->getDecoderInstance()->handleRawPackageData();
		} elseif ($this->getDecoderInstance()->ifDeocedPackagesLeft()) {
			// Some decoded packages have arrived (for this peer)
			$this->getDecoderInstance()->handleDecodedPackage();
		}
	}
}

// [EOF]
?>