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<?php
/**
* Joomla! Content Management System
*
* @copyright (C) 2006 Open Source Matters, Inc. <https://www.joomla.org>
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
namespace Joomla\CMS\Component;
\defined('JPATH_PLATFORM') or die;
use Joomla\CMS\Access\Access;
use Joomla\CMS\Cache\CacheControllerFactoryInterface;
use Joomla\CMS\Cache\Controller\CallbackController;
use Joomla\CMS\Cache\Exception\CacheExceptionInterface;
use Joomla\CMS\Component\Exception\MissingComponentException;
use Joomla\CMS\Dispatcher\ApiDispatcher;
use Joomla\CMS\Dispatcher\ComponentDispatcher;
use Joomla\CMS\Factory;
use Joomla\CMS\Filter\InputFilter;
use Joomla\CMS\Language\Text;
use Joomla\CMS\Profiler\Profiler;
use Joomla\Registry\Registry;
/**
* Component helper class
*
* @since 1.5
*/
class ComponentHelper
{
/**
* The component list cache
*
* @var ComponentRecord[]
* @since 1.6
*/
protected static $components = array();
/**
* Get the component information.
*
* @param string $option The component option.
* @param boolean $strict If set and the component does not exist, the enabled attribute will be set to false.
*
* @return ComponentRecord An object with the information for the component.
*
* @since 1.5
*/
public static function getComponent($option, $strict = false)
{
$components = static::getComponents();
if (isset($components[$option]))
{
return $components[$option];
}
$result = new ComponentRecord;
$result->enabled = $strict ? false : true;
$result->setParams(new Registry);
return $result;
}
/**
* Checks if the component is enabled
*
* @param string $option The component option.
*
* @return boolean
*
* @since 1.5
*/
public static function isEnabled($option)
{
$components = static::getComponents();
return isset($components[$option]) && $components[$option]->enabled;
}
/**
* Checks if a component is installed
*
* @param string $option The component option.
*
* @return integer
*
* @since 3.4
*/
public static function isInstalled($option)
{
$components = static::getComponents();
return isset($components[$option]) ? 1 : 0;
}
/**
* Gets the parameter object for the component
*
* @param string $option The option for the component.
* @param boolean $strict If set and the component does not exist, false will be returned
*
* @return Registry A Registry object.
*
* @see Registry
* @since 1.5
*/
public static function getParams($option, $strict = false)
{
return static::getComponent($option, $strict)->getParams();
}
/**
* Applies the global text filters to arbitrary text as per settings for current user groups
*
* @param string $text The string to filter
*
* @return string The filtered string
*
* @since 2.5
*/
public static function filterText($text)
{
// Punyencoding utf8 email addresses
$text = InputFilter::getInstance()->emailToPunycode($text);
// Filter settings
$config = static::getParams('com_config');
$user = Factory::getUser();
$userGroups = Access::getGroupsByUser($user->get('id'));
$filters = $config->get('filters');
$forbiddenListTags = array();
$forbiddenListAttributes = array();
$customListTags = array();
$customListAttributes = array();
$allowedListTags = array();
$allowedListAttributes = array();
$allowedList = false;
$forbiddenList = false;
$customList = false;
$unfiltered = false;
// Cycle through each of the user groups the user is in.
// Remember they are included in the Public group as well.
foreach ($userGroups as $groupId)
{
// May have added a group by not saved the filters.
if (!isset($filters->$groupId))
{
continue;
}
// Each group the user is in could have different filtering properties.
$filterData = $filters->$groupId;
$filterType = strtoupper($filterData->filter_type);
if ($filterType === 'NH')
{
// Maximum HTML filtering.
}
elseif ($filterType === 'NONE')
{
// No HTML filtering.
$unfiltered = true;
}
else
{
// Forbidden list or allowed list.
// Preprocess the tags and attributes.
$tags = explode(',', $filterData->filter_tags);
$attributes = explode(',', $filterData->filter_attributes);
$tempTags = array();
$tempAttributes = array();
foreach ($tags as $tag)
{
$tag = trim($tag);
if ($tag)
{
$tempTags[] = $tag;
}
}
foreach ($attributes as $attribute)
{
$attribute = trim($attribute);
if ($attribute)
{
$tempAttributes[] = $attribute;
}
}
// Collect the forbidden list or allowed list tags and attributes.
// Each list is cumulative.
if ($filterType === 'BL')
{
$forbiddenList = true;
$forbiddenListTags = array_merge($forbiddenListTags, $tempTags);
$forbiddenListAttributes = array_merge($forbiddenListAttributes, $tempAttributes);
}
elseif ($filterType === 'CBL')
{
// Only set to true if Tags or Attributes were added
if ($tempTags || $tempAttributes)
{
$customList = true;
$customListTags = array_merge($customListTags, $tempTags);
$customListAttributes = array_merge($customListAttributes, $tempAttributes);
}
}
elseif ($filterType === 'WL')
{
$allowedList = true;
$allowedListTags = array_merge($allowedListTags, $tempTags);
$allowedListAttributes = array_merge($allowedListAttributes, $tempAttributes);
}
}
}
// Remove duplicates before processing (because the forbidden list uses both sets of arrays).
$forbiddenListTags = array_unique($forbiddenListTags);
$forbiddenListAttributes = array_unique($forbiddenListAttributes);
$customListTags = array_unique($customListTags);
$customListAttributes = array_unique($customListAttributes);
$allowedListTags = array_unique($allowedListTags);
$allowedListAttributes = array_unique($allowedListAttributes);
if (!$unfiltered)
{
// Custom Forbidden list precedes Default forbidden list.
if ($customList)
{
$filter = InputFilter::getInstance(array(), array(), 1, 1);
// Override filter's default forbidden tags and attributes
if ($customListTags)
{
$filter->blockedTags = $customListTags;
}
if ($customListAttributes)
{
$filter->blockedAttributes = $customListAttributes;
}
}
// Forbidden list takes second precedence.
elseif ($forbiddenList)
{
// Remove the allowed tags and attributes from the forbidden list.
$forbiddenListTags = array_diff($forbiddenListTags, $allowedListTags);
$forbiddenListAttributes = array_diff($forbiddenListAttributes, $allowedListAttributes);
$filter = InputFilter::getInstance(
$forbiddenListTags,
$forbiddenListAttributes,
InputFilter::ONLY_BLOCK_DEFINED_TAGS,
InputFilter::ONLY_BLOCK_DEFINED_ATTRIBUTES
);
// Remove the allowed tags from filter's default forbidden list.
if ($allowedListTags)
{
$filter->blockedTags = array_diff($filter->blockedTags, $allowedListTags);
}
// Remove the allowed attributes from filter's default forbidden list.
if ($allowedListAttributes)
{
$filter->blockedAttributes = array_diff($filter->blockedAttributes, $allowedListAttributes);
}
}
// Allowed lists take third precedence.
elseif ($allowedList)
{
// Turn off XSS auto clean
$filter = InputFilter::getInstance($allowedListTags, $allowedListAttributes, 0, 0, 0);
}
// No HTML takes last place.
else
{
$filter = InputFilter::getInstance();
}
$text = $filter->clean($text, 'html');
}
return $text;
}
/**
* Render the component.
*
* @param string $option The component option.
* @param array $params The component parameters
*
* @return string
*
* @since 1.5
* @throws MissingComponentException
*/
public static function renderComponent($option, $params = array())
{
$app = Factory::getApplication();
$lang = Factory::getLanguage();
if (!$app->isClient('api'))
{
// Load template language files.
$template = $app->getTemplate(true)->template;
$lang->load('tpl_' . $template, JPATH_BASE)
|| $lang->load('tpl_' . $template, JPATH_THEMES . "/$template");
}
if (empty($option))
{
throw new MissingComponentException(Text::_('JLIB_APPLICATION_ERROR_COMPONENT_NOT_FOUND'), 404);
}
if (JDEBUG)
{
Profiler::getInstance('Application')->mark('beforeRenderComponent ' . $option);
}
// Record the scope
$scope = $app->scope;
// Set scope to component name
$app->scope = $option;
// Build the component path.
$option = preg_replace('/[^A-Z0-9_\.-]/i', '', $option);
// Define component path.
if (!\defined('JPATH_COMPONENT'))
{
/**
* Defines the path to the active component for the request
*
* Note this constant is application aware and is different for each application (site/admin).
*
* @var string
* @since 1.5
* @deprecated 5.0 without replacement
*/
\define('JPATH_COMPONENT', JPATH_BASE . '/components/' . $option);
}
if (!\defined('JPATH_COMPONENT_SITE'))
{
/**
* Defines the path to the site element of the active component for the request
*
* @var string
* @since 1.5
* @deprecated 5.0 without replacement
*/
\define('JPATH_COMPONENT_SITE', JPATH_SITE . '/components/' . $option);
}
if (!\defined('JPATH_COMPONENT_ADMINISTRATOR'))
{
/**
* Defines the path to the admin element of the active component for the request
*
* @var string
* @since 1.5
* @deprecated 5.0 without replacement
*/
\define('JPATH_COMPONENT_ADMINISTRATOR', JPATH_ADMINISTRATOR . '/components/' . $option);
}
// If component is disabled throw error
if (!static::isEnabled($option))
{
throw new MissingComponentException(Text::_('JLIB_APPLICATION_ERROR_COMPONENT_NOT_FOUND'), 404);
}
ob_start();
$app->bootComponent($option)->getDispatcher($app)->dispatch();
$contents = ob_get_clean();
// Revert the scope
$app->scope = $scope;
if (JDEBUG)
{
Profiler::getInstance('Application')->mark('afterRenderComponent ' . $option);
}
return $contents;
}
/**
* Load the installed components into the components property.
*
* @return boolean True on success
*
* @since 3.2
*/
protected static function load()
{
$loader = function ()
{
$db = Factory::getDbo();
$query = $db->getQuery(true)
->select($db->quoteName(['extension_id', 'element', 'params', 'enabled'], ['id', 'option', null, null]))
->from($db->quoteName('#__extensions'))
->where(
[
$db->quoteName('type') . ' = ' . $db->quote('component'),
$db->quoteName('state') . ' = 0',
$db->quoteName('enabled') . ' = 1',
]
);
$components = [];
$db->setQuery($query);
foreach ($db->getIterator() as $component)
{
$components[$component->option] = new ComponentRecord((array) $component);
}
return $components;
};
/** @var CallbackController $cache */
$cache = Factory::getContainer()->get(CacheControllerFactoryInterface::class)->createCacheController('callback', ['defaultgroup' => '_system']);
try
{
static::$components = $cache->get($loader, array(), __METHOD__);
}
catch (CacheExceptionInterface $e)
{
static::$components = $loader();
}
return true;
}
/**
* Get installed components
*
* @return ComponentRecord[] The components property
*
* @since 3.6.3
*/
public static function getComponents()
{
if (empty(static::$components))
{
static::load();
}
return static::$components;
}
/**
* Returns the component name (eg. com_content) for the given object based on the class name.
* If the object is not namespaced, then the alternative name is used.
*
* @param object $object The object controller or model
* @param string $alternativeName Mostly the value of getName() from the object
*
* @return string The name
*
* @since 4.0.0
*/
public static function getComponentName($object, string $alternativeName): string
{
$reflect = new \ReflectionClass($object);
if (!$reflect->getNamespaceName() || \get_class($object) === ComponentDispatcher::class || \get_class($object) === ApiDispatcher::class)
{
return 'com_' . strtolower($alternativeName);
}
$from = strpos($reflect->getNamespaceName(), '\\Component');
$to = strpos(substr($reflect->getNamespaceName(), $from + 11), '\\');
return 'com_' . strtolower(substr($reflect->getNamespaceName(), $from + 11, $to));
}
}