{%- macro _authorLink(author) -%}
  {%- if author.url -%}
    <a class="govuk-link" href="{{ author.url }}">{{ author.name }}</a>
  {%- else -%}
    {{- author.name or author -}}
  {%- endif -%}
{% endmacro -%}

<header class="app-document-header">
  <h1 class="app-document-header__title govuk-heading-xl">
    {{ params.title | smart }}
  </h1>
  {% if params.description %}
    <p class="app-document-header__description govuk-body-l">
      {{ params.description | markdown("inline") }}
    </p>
  {% endif %}

  {% if params.date or params.modified or params.authors or params.author %}
    <p class="app-document-header__metadata">
      {% if params.authors %}
        <span class="govuk-visually-hidden">Posted by: </span>
        {%- for author in params.authors -%}
          {{- " and " if loop.last else (", " if not loop.first) -}}
          {{- _authorLink(author) -}}
        {%- endfor -%}
        <span aria-hidden="true"> · </span>
      {% elif params.author %}
          {{- _authorLink(params.author) -}}
          <span aria-hidden="true"> · </span>
      {% endif %}
      {% if params.date %}
        <span class="govuk-visually-hidden">Posted on: </span><time datetime="{{ params.date | date }}">{{ params.date | date("d LLLL y") }}</time>
      {% endif %}
      {% if params.modified %}
        <span aria-hidden="true">•</span>
        Last updated <time datetime="{{ params.modified | date }}">{{ params.modified | date("d LLLL y") }}</time>
      {% endif %}
    </p>
  {% endif %}

</header>