{% if resource is defined and resource is not null %}
    {% if not resource.isNull() %}
        {% if resource.url is defined and resource.url is not null %}
            {% set href = host ~ resource.url %}
        {% else %}
            {% set href = host ~ form_submission_webdir ~ resource.fileName %}
        {% endif %}
        <a target="_blank"
           href="{{ href }}">{{ resource.fileName }}</a>
    {% endif %}
{% endif %}