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* @license GNU General Public License version 2 or later; see LICENSE.txt */ namespace Joomla\CMS\Helper; \defined('JPATH_PLATFORM') or die; use Joomla\CMS\Cache\CacheControllerFactoryInterface; use Joomla\CMS\Cache\Controller\CallbackController; use Joomla\CMS\Cache\Exception\CacheExceptionInterface; use Joomla\CMS\Factory; use Joomla\CMS\Language\Text; use Joomla\CMS\Log\Log; use Joomla\Registry\Registry; /** * Library helper class * * @since 3.2 */ class LibraryHelper { /** * The component list cache * * @var array * @since 3.2 */ protected static $libraries = array(); /** * Get the library information. * * @param string $element Element of the library in the extensions table. * @param boolean $strict If set and the library does not exist, the enabled attribute will be set to false. * * @return \stdClass An object with the library's information. * * @since 3.2 */ public static function getLibrary($element, $strict = false) { // Is already cached? if (isset(static::$libraries[$element]) || static::loadLibrary($element)) { $result = static::$libraries[$element]; // Convert the params to an object. if (\is_string($result->params)) { $result->params = new Registry($result->params); } } else { $result = new \stdClass; $result->enabled = $strict ? false : true; $result->params = new Registry; } return $result; } /** * Checks if a library is enabled * * @param string $element Element of the library in the extensions table. * * @return boolean * * @since 3.2 */ public static function isEnabled($element) { return static::getLibrary($element, true)->enabled; } /** * Gets the parameter object for the library * * @param string $element Element of the library in the extensions table. * @param boolean $strict If set and the library does not exist, false will be returned * * @return Registry A Registry object. * * @see Registry * @since 3.2 */ public static function getParams($element, $strict = false) { return static::getLibrary($element, $strict)->params; } /** * Save the parameters object for the library * * @param string $element Element of the library in the extensions table. * @param Registry $params Params to save * * @return Registry A Registry object. * * @see Registry * @since 3.2 */ public static function saveParams($element, $params) { if (static::isEnabled($element)) { // Save params in DB $db = Factory::getDbo(); $paramsString = $params->toString(); $query = $db->getQuery(true) ->update($db->quoteName('#__extensions')) ->set($db->quoteName('params') . ' = :params') ->where($db->quoteName('type') . ' = ' . $db->quote('library')) ->where($db->quoteName('element') . ' = :element') ->bind(':params', $paramsString) ->bind(':element', $element); $db->setQuery($query); $result = $db->execute(); // Update params in libraries cache if ($result && isset(static::$libraries[$element])) { static::$libraries[$element]->params = $params; } return $result; } return false; } /** * Load the installed library into the libraries property. * * @param string $element The element value for the extension * * @return boolean True on success * * @since 3.7.0 */ protected static function loadLibrary($element) { $loader = function ($element) { $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') . ' = ' . $db->quote('library')) ->where($db->quoteName('element') . ' = :element') ->bind(':element', $element); $db->setQuery($query); return $db->loadObject(); }; /** @var CallbackController $cache */ $cache = Factory::getContainer()->get(CacheControllerFactoryInterface::class)->createCacheController('callback', ['defaultgroup' => '_system']); try { static::$libraries[$element] = $cache->get($loader, array($element), __METHOD__ . $element); } catch (CacheExceptionInterface $e) { static::$libraries[$element] = $loader($element); } if (empty(static::$libraries[$element])) { // Fatal error. $error = Text::_('JLIB_APPLICATION_ERROR_LIBRARY_NOT_FOUND'); Log::add(Text::sprintf('JLIB_APPLICATION_ERROR_LIBRARY_NOT_LOADING', $element, $error), Log::WARNING, 'jerror'); return false; } return true; } }