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<?php
/**
* Joomla! Content Management System
*
* @copyright (C) 2019 Open Source Matters, Inc. <https://www.joomla.org>
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
namespace Joomla\CMS\Changelog;
\defined('JPATH_PLATFORM') or die;
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;
use RuntimeException;
/**
* Changelog class.
*
* @since 4.0.0
*/
class Changelog extends CMSObject
{
/**
* Update manifest `<element>` element
*
* @var string
* @since 4.0.0
*/
protected $element;
/**
* Update manifest `<type>` element
*
* @var string
* @since 4.0.0
*/
protected $type;
/**
* Update manifest `<version>` element
*
* @var string
* @since 4.0.0
*/
protected $version;
/**
* Update manifest `<security>` element
*
* @var array
* @since 4.0.0
*/
protected $security = array();
/**
* Update manifest `<fix>` element
*
* @var array
* @since 4.0.0
*/
protected $fix = array();
/**
* Update manifest `<language>` element
*
* @var array
* @since 4.0.0
*/
protected $language = array();
/**
* Update manifest `<addition>` element
*
* @var array
* @since 4.0.0
*/
protected $addition = array();
/**
* Update manifest `<change>` elements
*
* @var array
* @since 4.0.0
*/
protected $change = array();
/**
* Update manifest `<remove>` element
*
* @var array
* @since 4.0.0
*/
protected $remove = array();
/**
* Update manifest `<maintainer>` element
*
* @var array
* @since 4.0.0
*/
protected $note = array();
/**
* List of node items
*
* @var array
* @since 4.0.0
*/
private $items = array();
/**
* Resource handle for the XML Parser
*
* @var resource
* @since 4.0.0
*/
protected $xmlParser;
/**
* Element call stack
*
* @var array
* @since 4.0.0
*/
protected $stack = array('base');
/**
* Object containing the current update data
*
* @var \stdClass
* @since 4.0.0
*/
protected $currentChangelog;
/**
* The version to match the changelog
*
* @var string
* @since 4.0.0
*/
private $matchVersion = '';
/**
* Object containing the latest changelog data
*
* @var \stdClass
* @since 4.0.0
*/
protected $latest;
/**
* Gets the reference to the current direct parent
*
* @return object
*
* @since 4.0.0
*/
protected function getStackLocation()
{
return implode('->', $this->stack);
}
/**
* Get the last position in stack count
*
* @return string
*
* @since 4.0.0
*/
protected function getLastTag()
{
return $this->stack[\count($this->stack) - 1];
}
/**
* Set the version to match.
*
* @param string $version The version to match
*
* @return void
*
* @since 4.0.0
*/
public function setVersion(string $version)
{
$this->matchVersion = $version;
}
/**
* 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 = array())
{
$this->stack[] = $name;
$tag = $this->getStackLocation();
// Reset the data
if (isset($this->$tag))
{
$this->$tag->data = '';
}
switch ($name)
{
default:
$name = strtolower($name);
if (!isset($this->currentChangelog->$name))
{
$this->currentChangelog->$name = new \stdClass;
}
$this->currentChangelog->$name->data = '';
foreach ($attrs as $key => $data)
{
$key = strtolower($key);
$this->currentChangelog->$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)
{
case 'SECURITY':
case 'FIX':
case 'LANGUAGE':
case 'ADDITION':
case 'CHANGE':
case 'REMOVE':
case 'NOTE':
$name = strtolower($name);
$this->currentChangelog->$name->data = $this->items;
$this->items = array();
break;
case 'CHANGELOG':
if (version_compare($this->currentChangelog->version->data, $this->matchVersion, '==') === true)
{
$this->latest = $this->currentChangelog;
}
// No version match, empty it
$this->currentChangelog = new \stdClass;
break;
case 'CHANGELOGS':
// If the latest item is set then we transfer it to where we want to
if (isset($this->latest))
{
foreach (get_object_vars($this->latest) as $key => $val)
{
$this->$key = $val;
}
unset($this->latest);
unset($this->currentChangelog);
}
elseif (isset($this->currentChangelog))
{
// The update might be for an older version of j!
unset($this->currentChangelog);
}
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 = $this->getLastTag();
switch ($tag)
{
case 'ITEM':
$this->items[] = $data;
break;
case 'SECURITY':
case 'FIX':
case 'LANGUAGE':
case 'ADDITION':
case 'CHANGE':
case 'REMOVE':
case 'NOTE':
break;
default:
// Throw the data for this item together
$tag = strtolower($tag);
if (isset($this->currentChangelog->$tag))
{
$this->currentChangelog->$tag->data .= $data;
}
break;
}
}
/**
* Loads an XML file from a URL.
*
* @param string $url The URL.
*
* @return boolean True on success
*
* @since 4.0.0
*/
public function loadFromXml($url)
{
$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->currentChangelog = new \stdClass;
$this->xmlParser = xml_parser_create('');
xml_set_object($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;
}
}