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<?php /** * Joomla! Content Management System * * @copyright (C) 2024 Open Source Matters, Inc. <https://www.joomla.org> * @license GNU General Public License version 2 or later; see LICENSE.txt / namespace Joomla\CMS\Updater; // phpcs:disable PSR1.Files.SideEffects \defined('_JEXEC') or die; // phpcs:enable PSR1.Files.SideEffects use Joomla\CMS\Component\ComponentHelper; use Joomla\CMS\Factory; use Joomla\CMS\Filter\InputFilter; use Joomla\CMS\Version; /* * ConstraintChecker Class * * @since 5.1.0 * * @internal Currently this class is only used for Joomla! updates and will be extended in the future to support 3rd party updates / class ConstraintChecker { /* * This property holds information about failed environment constraints. * It b/c reasons to make sure the TUF implementation mirrors the XML update behaviors * * @var \stdClass * * @since 5.1.0 / protected \stdClass $failedEnvironmentConstraints; /* * The channel to check the constraints against * * @var string / protected $channel; /* * Constructor, used to populate the failed * * @param string\|null $channel The channel to be used for updating * * @return void * * @since 5.1.0 / public function __construct($channel = null) { $this->failedEnvironmentConstraints = new \stdClass(); if (!isset($channel)) { $params = ComponentHelper::getParams('com_joomlaupdate'); $channel = (Version::MAJOR_VERSION + ($params->get('updatesource', 'default') == 'next' ? 1 : 0)) . '.x'; } $this->channel = $channel; } /* * Checks whether the passed constraints are matched * * @param array $candidate The provided constraints to be checked * @param int $minimumStability The minimum stability required for updating * * @return boolean * * @since 5.1.0 / public function check(array $candidate, $minimumStability = Updater::STABILITY_STABLE) { if (!isset($candidate['targetplatform'])) { // targetplatform is required return false; } // Check targetplatform if (!$this->checkTargetplatform($candidate['targetplatform'])) { return false; } // Check channel if (isset($candidate['channel']) && $candidate['channel'] !== $this->channel) { return false; } // Check stability, assume true when not set if ( isset($candidate['stability']) && !$this->checkStability($candidate['stability'], $minimumStability) ) { return false; } $result = true; // Check php_minimum, assume true when not set if ( isset($candidate['php_minimum']) && !$this->checkPhpMinimum($candidate['php_minimum']) ) { $result = false; } // Check supported databases, assume true when not set if ( isset($candidate['supported_databases']) && !$this->checkSupportedDatabases($candidate['supported_databases']) ) { $result = false; } return $result; } /* * Gets the failed constraints for further processing * * @return \stdClass * * @since 5.1.0 / public function getFailedEnvironmentConstraints(): \stdClass { return $this->failedEnvironmentConstraints; } /* * Check the targetPlatform * * @param array $targetPlatform * * @return boolean * * @since 5.1.0 / protected function checkTargetplatform(array $targetPlatform) { // Lower case and remove the exclamation mark $product = strtolower(InputFilter::getInstance()->clean(Version::PRODUCT, 'cmd')); // Check that the product matches and that the version matches (optionally a regexp) if ( $product === $targetPlatform["name"] && preg_match('/^' . $targetPlatform["version"] . '/', JVERSION) ) { return true; } return false; } /* * Check the minimum PHP version * * @param string $phpMinimum The minimum php version to check * * @return boolean * * @since 5.1.0 / protected function checkPhpMinimum(string $phpMinimum) { // Check if PHP version supported via <php_minimum> tag $result = version_compare(PHP_VERSION, $phpMinimum, '>='); if (!$result) { $this->failedEnvironmentConstraints->php = new \stdClass(); $this->failedEnvironmentConstraints->php->required = $phpMinimum; $this->failedEnvironmentConstraints->php->used = PHP_VERSION; return false; } return true; } /* * Check the supported databases and versions * * @param array $supportedDatabases array of supported databases and versions * * @return boolean * * @since 5.1.0 / protected function checkSupportedDatabases(array $supportedDatabases) { $db = Factory::getDbo(); $dbType = strtolower($db->getServerType()); $dbVersion = $db->getVersion(); // MySQL and MariaDB use the same database driver but not the same version numbers if ($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); $dbType = 'mariadb'; } } // Do we have an entry for the database? if (!empty($supportedDatabases["$dbType"])) { $minimumVersion = $supportedDatabases["$dbType"]; $result = version_compare($dbVersion, $minimumVersion, '>='); if (!$result) { $this->failedEnvironmentConstraints->db = new \stdClass(); $this->failedEnvironmentConstraints->db->type = $dbType; $this->failedEnvironmentConstraints->db->required = $minimumVersion; $this->failedEnvironmentConstraints->db->used = $dbVersion; return false; } return true; } return false; } /* * Check the stability * * @param string $stability Stability to check * @param int $minimumStability The minimum stability required for updating * * @return boolean * * @since 5.1.0 / protected function checkStability(string $stability, $minimumStability = Updater::STABILITY_STABLE) { $stabilityInt = $this->stabilityToInteger($stability); if ($stabilityInt < $minimumStability) { return false; } 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 $tag The tag string, e.g. dev, alpha, beta, rc, stable * * @return integer * * @since 5.1.0 */ protected function stabilityToInteger($tag) { $constant = '\\Joomla\\CMS\\Updater\\Updater::STABILITY_' . strtoupper($tag); if (\defined($constant)) { return \constant($constant); } return Updater::STABILITY_STABLE; } }

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