{% assign heading = include.heading | default: "h3" %}
{% assign size = include.size | default: "medium" %}
{% assign sponsors = site.data.sponsorship.sponsors | sort: "name" %}
{% assign year = include.year | to_integer %}

{% for level in site.data.sponsorship.levels %}
  {% if include.levels %}{% unless include.levels contains level[0] %}{% continue %}{% endunless %}{% endif %}

  {%- capture logos -%}
    {%- for sponsor in sponsors -%}
      {%- for sponsorship in sponsor.sponsorships -%}
        {%- if sponsorship[0] == year and sponsorship[1] == level[0] -%}
          <a class="logo-wall-item {% if sponsor.logo.horizontal %}horizontal{% endif %}" href="{{ sponsor.url }}">
            {%- if sponsor.logo.horizontal -%}
              <img src="{{ sponsor.logo.horizontal }}" alt="{{ sponsor.name }}">
            {%- elsif sponsor.logo.square -%}
              <img src="{{ sponsor.logo.square }}" alt="{{ sponsor.name }}">
            {%- else -%}
              {{ sponsor.name }}
            {%- endif -%}
          </a>
        {%- endif -%}
      {%- endfor -%}
    {%- endfor -%}
  {%- endcapture -%}

  {% unless logos == empty %}
    <{{ heading }} class="text-center">{{ level[1] }}</{{ heading }}>

    <div class="logo-wall {{ size }} level-{{ level[0] }}">{{ logos }}</div>
  {% endunless %}
{% endfor %}