<?php
/**
 * @version		$Id: archive.php 11952 2009-06-01 03:21:19Z robs $
 * @package		Joomla.Framework
 * @subpackage	FileSystem
 * @copyright	Copyright (C) 2005 - 2009 Open Source Matters, Inc. All rights reserved.
 * @license		GNU General Public License version 2 or later; see LICENSE.txt
 */

/**
 * An Archive handling class
 *
 * @static
 * @package 	Joomla.Framework
 * @subpackage	FileSystem
 * @since		1.5
 */
class JArchive
{
	/**
	 * @param	string	The name of the archive file
	 * @param	string	Directory to unpack into
	 * @return	boolean	True for success
	 */
	function extract($archivename, $extractdir)
	{
		juimport('joomla.filesystem.file');
		juimport('joomla.filesystem.folder');
		$untar = false;
		$result = false;
		$ext = JFile::getExt(strtolower($archivename));
		// check if a tar is embedded...gzip/bzip2 can just be plain files!
		if (JFile::getExt(JFile::stripExt(strtolower($archivename))) == 'tar') {
			$untar = true;
		}

		switch ($ext)
		{
			case 'zip':
				$adapter = &JArchive::getAdapter('zip');
				if ($adapter) {
					$result = $adapter->extract($archivename, $extractdir);
				}
				break;
			case 'tar':
				$adapter = &JArchive::getAdapter('tar');
				if ($adapter) {
					$result = $adapter->extract($archivename, $extractdir);
				}
				break;
			case 'tgz'  :
				$untar = true;	// This format is a tarball gzip'd
			case 'gz'   :	// This may just be an individual file (e.g. sql script)
			case 'gzip' :
				$adapter = &JArchive::getAdapter('gzip');
				if ($adapter)
				{
					$config = &JFactory::getConfig();
					$tmpfname = $config->getValue('config.tmp_path').DS.uniqid('gzip');
					$gzresult = $adapter->extract($archivename, $tmpfname);
					if (JError::isError($gzresult))
					{
						@unlink($tmpfname);
						return false;
					}
					if ($untar)
					{
						// Try to untar the file
						$tadapter = &JArchive::getAdapter('tar');
						if ($tadapter) {
							$result = $tadapter->extract($tmpfname, $extractdir);
						}
					}
					else
					{
						$path = JPath::clean($extractdir);
						JFolder::create($path);
						$result = JFile::copy($tmpfname,$path.DS.JFile::stripExt(JFile::getName(strtolower($archivename))),null,1);
					}
					@unlink($tmpfname);
				}
				break;
			case 'tbz2' :
				$untar = true; // This format is a tarball bzip2'd
			case 'bz2'  :	// This may just be an individual file (e.g. sql script)
			case 'bzip2':
				$adapter = &JArchive::getAdapter('bzip2');
				if ($adapter)
				{
					$config = &JFactory::getConfig();
					$tmpfname = $config->getValue('config.tmp_path').DS.uniqid('bzip2');
					$bzresult = $adapter->extract($archivename, $tmpfname);
					if (JError::isError($bzresult))
					{
						@unlink($tmpfname);
						return false;
					}
					if ($untar)
					{
						// Try to untar the file
						$tadapter = &JArchive::getAdapter('tar');
						if ($tadapter) {
							$result = $tadapter->extract($tmpfname, $extractdir);
						}
					}
					else
					{
						$path = JPath::clean($extractdir);
						JFolder::create($path);
						$result = JFile::copy($tmpfname,$path.DS.JFile::stripExt(JFile::getName(strtolower($archivename))),null,1);
					}
					@unlink($tmpfname);
				}
				break;
			default:
				JError::raiseWarning(10, JText::_('UNKNOWNARCHIVETYPE'));
				return false;
				break;
		}

		if (! $result || JError::isError($result)) {
			return false;
		}
		return true;
	}

	function &getAdapter($type)
	{
		static $adapters;

		if (!isset($adapters)) {
			$adapters = array();
		}

		if (!isset($adapters[$type]))
		{
			// Try to load the adapter object
			$class = 'JArchive'.ucfirst($type);

			if (!class_exists($class))
			{
				$path = dirname(__FILE__).DS.'archive'.DS.strtolower($type).'.php';
				if (file_exists($path)) {
					require_once($path);
				} else {
					JError::raiseError(500,JText::_('Unable to load archive'));
				}
			}

			$adapters[$type] = new $class();
		}
		return $adapters[$type];
	}
}