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<?php
/**
* Joomla! Content Management System
*
* @copyright (C) 2008 Open Source Matters, Inc. <https://www.joomla.org>
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
namespace Joomla\CMS\Updater;
use Joomla\CMS\Factory;
use Joomla\CMS\Filter\InputFilter;
use Joomla\CMS\Http\HttpFactory;
use Joomla\CMS\Language\Text;
use Joomla\CMS\Log\Log;
use Joomla\CMS\Object\CMSObject;
use Joomla\CMS\Version;
use Joomla\Registry\Registry;
// phpcs:disable PSR1.Files.SideEffects
\defined('JPATH_PLATFORM') or die;
// phpcs:enable PSR1.Files.SideEffects
/**
* Update class. It is used by Updater::update() to install an update. Use Updater::findUpdates() to find updates for
* an extension.
*
* @since 1.7.0
*/
class Update extends CMSObject
{
/**
* Update manifest `<name>` element
*
* @var string
* @since 1.7.0
*/
protected $name;
/**
* Update manifest `<description>` element
*
* @var string
* @since 1.7.0
*/
protected $description;
/**
* Update manifest `<element>` element
*
* @var string
* @since 1.7.0
*/
protected $element;
/**
* Update manifest `<type>` element
*
* @var string
* @since 1.7.0
*/
protected $type;
/**
* Update manifest `<version>` element
*
* @var string
* @since 1.7.0
*/
protected $version;
/**
* Update manifest `<infourl>` element
*
* @var string
* @since 1.7.0
*/
protected $infourl;
/**
* Update manifest `<client>` element
*
* @var string
* @since 1.7.0
*/
protected $client;
/**
* Update manifest `<group>` element
*
* @var string
* @since 1.7.0
*/
protected $group;
/**
* Update manifest `<downloads>` element
*
* @var string
* @since 1.7.0
*/
protected $downloads;
/**
* Update manifest `<downloadsource>` elements
*
* @var DownloadSource[]
* @since 3.8.3
*/
protected $downloadSources = [];
/**
* Update manifest `<tags>` element
*
* @var string
* @since 1.7.0
*/
protected $tags;
/**
* Update manifest `<maintainer>` element
*
* @var string
* @since 1.7.0
*/
protected $maintainer;
/**
* Update manifest `<maintainerurl>` element
*
* @var string
* @since 1.7.0
*/
protected $maintainerurl;
/**
* Update manifest `<category>` element
*
* @var string
* @since 1.7.0
*/
protected $category;
/**
* Update manifest `<relationships>` element
*
* @var string
* @since 1.7.0
*/
protected $relationships;
/**
* Update manifest `<targetplatform>` element
*
* @var string
* @since 1.7.0
*/
protected $targetplatform;
/**
* Extra query for download URLs
*
* @var string
* @since 3.2.0
*/
protected $extra_query;
/**
* Resource handle for the XML Parser
*
* @var resource
* @since 3.0.0
*/
protected $xmlParser;
/**
* Element call stack
*
* @var array
* @since 3.0.0
*/
protected $stack = ['base'];
/**
* Unused state array
*
* @var array
* @since 3.0.0
*/
protected $stateStore = [];
/**
* Object containing the current update data
*
* @var \stdClass
* @since 3.0.0
*/
protected $currentUpdate;
/**
* Object containing the latest update data which meets the PHP and DB version requirements
*
* @var \stdClass
* @since 3.0.0
*/
protected $latest;
/**
* Object containing details if the latest update does not meet the PHP and DB version requirements
*
* @var \stdClass
* @since 4.4.2
*/
protected $otherUpdateInfo;
/**
* The minimum stability required for updates to be taken into account. The possible values are:
* 0 dev Development snapshots, nightly builds, pre-release versions and so on
* 1 alpha Alpha versions (work in progress, things are likely to be broken)
* 2 beta Beta versions (major functionality in place, show-stopper bugs are likely to be present)
* 3 rc Release Candidate versions (almost stable, minor bugs might be present)
* 4 stable Stable versions (production quality code)
*
* @var integer
* @since 14.1
*
* @see Updater
*/
protected $minimum_stability = Updater::STABILITY_STABLE;
/**
* Array with compatible versions used by the pre-update check
*
* @var array
* @since 3.10.2
*/
protected $compatibleVersions = [];
/**
* Gets the reference to the current direct parent
*
* @return string
*
* @since 1.7.0
*/
protected function _getStackLocation()
{
return implode('->', $this->stack);
}
/**
* Get the last position in stack count
*
* @return string
*
* @since 1.7.0
*/
protected function _getLastTag()
{
return $this->stack[\count($this->stack) - 1];
}
/**
* XML Start Element callback
*
* @param object $parser Parser object
* @param string $name Name of the tag found
* @param array $attrs Attributes of the tag
*
* @return void
*
* @note This is public because it is called externally
* @since 1.7.0
*/
public function _startElement($parser, $name, $attrs = [])
{
$this->stack[] = $name;
$tag = $this->_getStackLocation();
// Reset the data
if (isset($this->$tag)) {
$this->$tag->_data = '';
}
switch ($name) {
// This is a new update; create a current update
case 'UPDATE':
$this->currentUpdate = new \stdClass();
break;
// Handle the array of download sources
case 'DOWNLOADSOURCE':
$source = new DownloadSource();
foreach ($attrs as $key => $data) {
$key = strtolower($key);
$source->$key = $data;
}
$this->downloadSources[] = $source;
break;
// Don't do anything
case 'UPDATES':
break;
// For everything else there's...the default!
default:
$name = strtolower($name);
if (!isset($this->currentUpdate->$name)) {
$this->currentUpdate->$name = new \stdClass();
}
$this->currentUpdate->$name->_data = '';
foreach ($attrs as $key => $data) {
$key = strtolower($key);
$this->currentUpdate->$name->$key = $data;
}
break;
}
}
/**
* Callback for closing the element
*
* @param object $parser Parser object
* @param string $name Name of element that was closed
*
* @return void
*
* @note This is public because it is called externally
* @since 1.7.0
*/
public function _endElement($parser, $name)
{
array_pop($this->stack);
switch ($name) {
// Closing update, find the latest version and check
case 'UPDATE':
$product = strtolower(InputFilter::getInstance()->clean(Version::PRODUCT, 'cmd'));
// Check that the product matches and that the version matches (optionally a regexp)
if (
isset($this->currentUpdate->targetplatform->name)
&& $product == $this->currentUpdate->targetplatform->name
&& preg_match('/^' . $this->currentUpdate->targetplatform->version . '/', $this->get('jversion.full', JVERSION))
) {
// Collect information on updates which do not meet PHP and DB version requirements
$otherUpdateInfo = new \stdClass();
$otherUpdateInfo->version = $this->currentUpdate->version->_data;
$phpMatch = false;
// Check if PHP version supported via <php_minimum> tag, assume true if tag isn't present
if (!isset($this->currentUpdate->php_minimum) || version_compare(PHP_VERSION, $this->currentUpdate->php_minimum->_data, '>=')) {
$phpMatch = true;
}
if (!$phpMatch) {
$otherUpdateInfo->php = new \stdClass();
$otherUpdateInfo->php->required = $this->currentUpdate->php_minimum->_data;
$otherUpdateInfo->php->used = PHP_VERSION;
}
$dbMatch = false;
// Check if DB & version is supported via <supported_databases> tag, assume supported if tag isn't present
if (isset($this->currentUpdate->supported_databases)) {
$db = Factory::getDbo();
$dbType = strtolower($db->getServerType());
$dbVersion = $db->getVersion();
$supportedDbs = $this->currentUpdate->supported_databases;
// MySQL and MariaDB use the same database driver but not the same version numbers
if ($dbType === 'mysql') {
// Check whether we have a MariaDB version string and extract the proper version from it
if (stripos($dbVersion, 'mariadb') !== false) {
// MariaDB: Strip off any leading '5.5.5-', if present
$dbVersion = preg_replace('/^5\.5\.5-/', '', $dbVersion);
$dbType = 'mariadb';
}
}
// Do we have an entry for the database?
if (isset($supportedDbs->$dbType)) {
$minimumVersion = $supportedDbs->$dbType;
$dbMatch = version_compare($dbVersion, $minimumVersion, '>=');
if (!$dbMatch) {
$otherUpdateInfo->db = new \stdClass();
$otherUpdateInfo->db->type = $dbType;
$otherUpdateInfo->db->required = $minimumVersion;
$otherUpdateInfo->db->used = $dbVersion;
}
}
} else {
// Set to true if the <supported_databases> tag is not set
$dbMatch = true;
}
// Check minimum stability
$stabilityMatch = true;
if (isset($this->currentUpdate->stability) && ($this->currentUpdate->stability < $this->minimum_stability)) {
$stabilityMatch = false;
}
if ($phpMatch && $stabilityMatch && $dbMatch) {
if (!empty($this->currentUpdate->downloadurl) && !empty($this->currentUpdate->downloadurl->_data)) {
$this->compatibleVersions[] = $this->currentUpdate->version->_data;
}
if (
!isset($this->latest)
|| version_compare($this->currentUpdate->version->_data, $this->latest->version->_data, '>')
) {
$this->latest = $this->currentUpdate;
}
} elseif (
!isset($this->otherUpdateInfo)
|| version_compare($otherUpdateInfo->version, $this->otherUpdateInfo->version, '>')
) {
$this->otherUpdateInfo = $otherUpdateInfo;
}
}
break;
case 'UPDATES':
// If the latest item is set then we transfer it to where we want to
if (isset($this->latest)) {
// This is an optional tag and therefore we need to be sure that this is gone and only used when set by the update itself
unset($this->downloadSources);
foreach (get_object_vars($this->latest) as $key => $val) {
$this->$key = $val;
}
unset($this->latest);
unset($this->currentUpdate);
} elseif (isset($this->currentUpdate)) {
// The update might be for an older version of j!
unset($this->currentUpdate);
}
break;
}
}
/**
* Character Parser Function
*
* @param object $parser Parser object.
* @param object $data The data.
*
* @return void
*
* @note This is public because its called externally.
* @since 1.7.0
*/
public function _characterData($parser, $data)
{
$tag = $this->_getLastTag();
// Throw the data for this item together
$tag = strtolower($tag);
if ($tag === 'tag') {
$this->currentUpdate->stability = $this->stabilityTagToInteger((string) $data);
return;
}
if ($tag === 'downloadsource') {
// Grab the last source so we can append the URL
$source = end($this->downloadSources);
$source->url = $data;
return;
}
if (isset($this->currentUpdate->$tag)) {
$this->currentUpdate->$tag->_data .= $data;
}
}
/**
* Loads an XML file from a URL.
*
* @param string $url The URL.
* @param int $minimumStability The minimum stability required for updating the extension {@see Updater}
*
* @return boolean True on success
*
* @since 1.7.0
*/
public function loadFromXml($url, $minimumStability = Updater::STABILITY_STABLE)
{
$version = new Version();
$httpOption = new Registry();
$httpOption->set('userAgent', $version->getUserAgent('Joomla', true, false));
try {
$http = HttpFactory::getHttp($httpOption);
$response = $http->get($url);
} catch (\RuntimeException $e) {
$response = null;
}
if ($response === null || $response->code !== 200) {
// @todo: Add a 'mark bad' setting here somehow
Log::add(Text::sprintf('JLIB_UPDATER_ERROR_EXTENSION_OPEN_URL', $url), Log::WARNING, 'jerror');
return false;
}
$this->minimum_stability = $minimumStability;
$this->xmlParser = xml_parser_create('');
xml_set_object($this->xmlParser, $this);
xml_set_element_handler($this->xmlParser, '_startElement', '_endElement');
xml_set_character_data_handler($this->xmlParser, '_characterData');
if (!xml_parse($this->xmlParser, $response->body)) {
Log::add(
sprintf(
'XML error: %s at line %d',
xml_error_string(xml_get_error_code($this->xmlParser)),
xml_get_current_line_number($this->xmlParser)
),
Log::WARNING,
'updater'
);
return false;
}
xml_parser_free($this->xmlParser);
return true;
}
/**
* Converts a tag to numeric stability representation. If the tag doesn't represent a known stability level (one of
* dev, alpha, beta, rc, stable) it is ignored.
*
* @param string $tag The tag string, e.g. dev, alpha, beta, rc, stable
*
* @return integer
*
* @since 3.4
*/
protected function stabilityTagToInteger($tag)
{
$constant = '\\Joomla\\CMS\\Updater\\Updater::STABILITY_' . strtoupper($tag);
if (\defined($constant)) {
return \constant($constant);
}
return Updater::STABILITY_STABLE;
}
}