Imbo\EventListener\ImageVariations::configureDatabase PHP Метод

    private function configureDatabase(array $config)
    {
        if (!isset($config['database']) || !isset($config['database']['adapter'])) {
            throw new InvalidArgumentException('Missing database adapter configuration for the image variations event listener', 500);
        }
        $config = $config['database'];
        if (is_callable($config['adapter'])) {
            $databaseAdapter = $config['adapter']();
        } else {
            if (is_string($config['adapter'])) {
                $databaseAdapter = new $config['adapter'](isset($config['params']) ? $config['params'] : null);
            } else {
                $databaseAdapter = $config['adapter'];
            }
        }
        if (!$databaseAdapter instanceof DatabaseInterface) {
            throw new InvalidArgumentException('Invalid database adapter for the image variations event listener', 500);
        }
        $this->database = $databaseAdapter;
    }