Method abort

/**
 * Installation abort method
 *
 * @param   string  $msg   Abort message from the installer
 * @param   string  $type  Package type if defined
 *
 * @return  boolean  True if successful
 *
 * @since   3.1
 */
public function abort($msg = null, $type = null)
{
    $retval = true;
    $step = array_pop($this->stepStack);
    // Raise abort warning
    if ($msg) {
        Log::add($msg, Log::WARNING, 'jerror');
    }
    while ($step != null) {
        switch ($step['type']) {
            case 'file':
                // Remove the file
                $stepval = File::delete($step['path']);
                break;
            case 'folder':
                // Remove the folder
                $stepval = Folder::delete($step['path']);
                break;
            case 'query':
                // Execute the query.
                $stepval = $this->parseSQLFiles($step['script']);
                break;
            case 'extension':
                // Get database connector object
                $db = $this->getDbo();
                $query = $db->getQuery(true);
                $stepId = (int) $step['id'];
                // Remove the entry from the #__extensions table
                $query->delete($db->quoteName('#__extensions'))->where($db->quoteName('extension_id') . ' = :step_id')->bind(':step_id', $stepId, ParameterType::INTEGER);
                $db->setQuery($query);
                try {
                    $db->execute();
                    $stepval = true;
                } catch (ExecutionFailureException $e) {
                    // The database API will have already logged the error it caught, we just need to alert the user to the issue
                    Log::add(Text::_('JLIB_INSTALLER_ABORT_ERROR_DELETING_EXTENSIONS_RECORD'), Log::WARNING, 'jerror');
                    $stepval = false;
                }
                break;
            default:
                if ($type && \is_object($this->_adapters[$type])) {
                    // Build the name of the custom rollback method for the type
                    $method = '_rollback_' . $step['type'];
                    // Custom rollback method handler
                    if (method_exists($this->_adapters[$type], $method)) {
                        $stepval = $this->_adapters[$type]->{$method}($step);
                    }
                } else {
                    // Set it to false
                    $stepval = false;
                }
                break;
        }
        // Only set the return value if it is false
        if ($stepval === false) {
            $retval = false;
        }
        // Get the next step and continue
        $step = array_pop($this->stepStack);
    }
    return $retval;
}