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<?php
/**
 * Part of the Joomla Framework Archive Package
 *
 * @copyright  Copyright (C) 2005 - 2021 Open Source Matters, Inc. All rights reserved.
 * @license    GNU General Public License version 2 or later; see LICENSE
 */

namespace Joomla\Archive;

use Joomla\Archive\Exception\UnknownArchiveException;
use Joomla\Archive\Exception\UnsupportedArchiveException;
use Joomla\Filesystem\File;
use Joomla\Filesystem\Folder;

/**
 * An Archive handling class
 *
 * @since  1.0
 */
class Archive
{
	/**
	 * The array of instantiated archive adapters.
	 *
	 * @var    ExtractableInterface[]
	 * @since  1.0
	 */
	protected $adapters = [];

/**
	 * Holds the options array.
	 *
	 * @var    array|\ArrayAccess
	 * @since  1.0
	 */
	public $options = [];

/**
	 * Create a new Archive object.
	 *
	 * @param   array|\ArrayAccess  $options  An array of options
	 *
	 * @since   1.0
	 * @throws  \InvalidArgumentException
	 */
	public function __construct($options = [])
	{
		if (!\is_array($options) && !($options instanceof \ArrayAccess))
		{
			throw new \InvalidArgumentException(
				'The options param must be an array or implement the ArrayAccess interface.'
			);
		}

// Make sure we have a tmp directory.
		isset($options['tmp_path']) || $options['tmp_path'] = realpath(sys_get_temp_dir());

$this->options = $options;
	}

/**
	 * Extract an archive file to a directory.
	 *
	 * @param   string  $archivename  The name of the archive file
	 * @param   string  $extractdir   Directory to unpack into
	 *
	 * @return  boolean  True for success
	 *
	 * @since   1.0
	 * @throws  UnknownArchiveException if the archive type is not supported
	 */
	public function extract($archivename, $extractdir)
	{
		$ext      = pathinfo($archivename, \PATHINFO_EXTENSION);
		$path     = pathinfo($archivename, \PATHINFO_DIRNAME);
		$filename = pathinfo($archivename, \PATHINFO_FILENAME);

switch (strtolower($ext))
		{
			case 'zip':
				$result = $this->getAdapter('zip')->extract($archivename, $extractdir);

break;

case 'tar':
				$result = $this->getAdapter('tar')->extract($archivename, $extractdir);

break;

case 'tgz':
			case 'gz':
			case 'gzip':
				// This may just be an individual file (e.g. sql script)
				$tmpfname = $this->options['tmp_path'] . '/' . uniqid('gzip');

try
				{
					$this->getAdapter('gzip')->extract($archivename, $tmpfname);
				}
				catch (\RuntimeException $exception)
				{
					@unlink($tmpfname);

return false;
				}

if ($ext === 'tgz' || stripos($filename, '.tar') !== false)
				{
					$result = $this->getAdapter('tar')->extract($tmpfname, $extractdir);
				}
				else
				{
					Folder::create($extractdir);
					$result = File::copy($tmpfname, $extractdir . '/' . $filename, null, false);
				}

@unlink($tmpfname);

break;

case 'tbz2':
			case 'bz2':
			case 'bzip2':
				// This may just be an individual file (e.g. sql script)
				$tmpfname = $this->options['tmp_path'] . '/' . uniqid('bzip2');

try
				{
					$this->getAdapter('bzip2')->extract($archivename, $tmpfname);
				}
				catch (\RuntimeException $exception)
				{
					@unlink($tmpfname);

return false;
				}

if ($ext === 'tbz2' || stripos($filename, '.tar') !== false)
				{
					$result = $this->getAdapter('tar')->extract($tmpfname, $extractdir);
				}
				else
				{
					Folder::create($extractdir);
					$result = File::copy($tmpfname, $extractdir . '/' . $filename, null, false);
				}

@unlink($tmpfname);

break;

default:
				throw new UnknownArchiveException(sprintf('Unsupported archive type: %s', $ext));
		}

return $result;
	}

/**
	 * Method to override the provided adapter with your own implementation.
	 *
	 * @param   string   $type      Name of the adapter to set.
	 * @param   string   $class     FQCN of your class which implements ExtractableInterface.
	 * @param   boolean  $override  True to force override the adapter type.
	 *
	 * @return  $this
	 *
	 * @since   1.0
	 * @throws  UnsupportedArchiveException if the adapter type is not supported
	 */
	public function setAdapter($type, $class, $override = true)
	{
		if ($override || !isset($this->adapters[$type]))
		{
			if (!\is_object($class) && !class_exists($class))
			{
				throw new UnsupportedArchiveException($type, sprintf('Archive adapter "%s" (class "%s") not found.', $type, $class));
			}

if (!$class::isSupported())
			{
				throw new UnsupportedArchiveException($type, sprintf('Archive adapter "%s" (class "%s") not supported.', $type, $class));
			}

$object = new $class($this->options);

if (!($object instanceof ExtractableInterface))
			{
				throw new UnsupportedArchiveException(
					$type,
					sprintf(
						'The provided adapter "%s" (class "%s") must implement %s',
						$type,
						$class,
						ExtractableInterface::class
					)
				);
			}

$this->adapters[$type] = $object;
		}

return $this;
	}

/**
	 * Get a file compression adapter.
	 *
	 * @param   string  $type  The type of adapter (bzip2|gzip|tar|zip).
	 *
	 * @return  ExtractableInterface  Adapter for the requested type
	 *
	 * @since   1.0
	 */
	public function getAdapter($type)
	{
		$type = strtolower($type);

if (!isset($this->adapters[$type]))
		{
			// Try to load the adapter object
			$this->setAdapter($type, __NAMESPACE__ . '\\' . ucfirst($type));
		}

return $this->adapters[$type];
	}
}