{%- macro badge_image_url(badge, MEDIA_URL, request=None) -%}
    {%- if badge.image -%}
        {%- set img_url = badge.image.url -%}
    {%- else -%}
        {%- set img_url = MEDIA_URL + "img/badges/" + badge.slug + '.png' -%}
    {%- endif -%}
    {%- if request -%}
        {{ request.build_absolute_uri(img_url) }}
    {%- else -%}
        {{ img_url }}
    {%- endif -%}
{%- endmacro -%}
{% macro badge_image(badge, MEDIA_URL, size=128) -%}
    <img src="{{ badge_image_url(badge, MEDIA_URL) }}" alt="{{ badge.title }}"
        width="{{ size }}" height="{{ size }}" />
{%- endmacro %}