protected function isValidBroadcastType($broadcastType)
    {
        $validBroadcastTypes = ['archive', 'highlight', 'upload'];

        $broadcastTypeArray = explode(',', $broadcastType);
        foreach ($broadcastTypeArray as $type) {
            if (!in_array($type, $validBroadcastTypes)) {
                return false;
            }
        }

        return true;
    }