/**
* Check if extension requirements are met
* Always returns true, but throws exception on error
*
* @param common_ext_Extension $extension
* @throws common_ext_MissingExtensionException
* @throws common_ext_OutdatedVersionException
* @throws common_exception_Error
* @return boolean
*/
public static function checkRequiredExtensions(common_ext_Extension $extension)
{
$extensionManager = common_ext_ExtensionsManager::singleton();
foreach ($extension->getDependencies() as $requiredExt => $requiredVersion) {
$installedVersion = $extensionManager->getInstalledVersion($requiredExt);
if (is_null($installedVersion)) {
throw new common_ext_MissingExtensionException('Extension ' . $requiredExt . ' is needed by the extension to be installed but is missing.', 'GENERIS');
}
if ($requiredVersion != '*') {
$matches = array();
preg_match('/[0-9\\.]+/', $requiredVersion, $matches, PREG_OFFSET_CAPTURE);
if (count($matches) == 1) {
$match = current($matches);
$nr = $match[0];
$operator = $match[1] > 0 ? substr($requiredVersion, 0, $match[1]) : '=';
if (!version_compare($installedVersion, $nr, $operator)) {
throw new common_ext_OutdatedVersionException('Installed version of ' . $requiredExt . ' ' . $installedVersion . ' does not satisfy required ' . $requiredVersion . ' for ' . $extension->getId());
}
} else {
throw new common_exception_Error('Unsupported version requirement: "' . $requiredVersion . '"');
}
}
}
// always return true, or throws an exception
return true;
}
