{% macro github_reference(number, path) -%}
  {% if view.github_repository_url -%}
    <a class="issue-number" href="{{ view.github_repository_url }}/{{ path }}/{{ number }}" target="_blank" rel="noopener noreferrer">#{{ number }}</a>
  {%- else -%}
    <strong class="issue-number">#{{ number }}</strong>
  {%- endif %}
{%- endmacro %}
{#- An issue in another repository links there and is named with it, as GitHub names one. -#}
{% macro issue_reference(issue) -%}
  {% if issue.repository -%}
    <a class="issue-number" href="https://github.com/{{ issue.repository }}/issues/{{ issue.number }}" target="_blank" rel="noopener noreferrer">{{ issue.repository }}#{{ issue.number }}</a>
  {%- else -%}
    {{ github_reference(issue.number, "issues") }}
  {%- endif %}
{%- endmacro %}
{#- An issue's state, then each fact that GitHub holds about it with the issues and pull requests that the fact names. An issue whose state is unknown shows nothing. -#}
{% macro issue_state(state, facts) -%}
  {% if state is not none %}<span class="issue-state">{{ state }}{% for fact in facts %}, {{ fact.words }}{% for issue in fact.issues %}{% if loop.first %} {% else %}, {% endif %}{{ issue_reference(issue) }}{% endfor %}{% for number in fact.pull_requests %}{% if loop.first %} {% else %}, {% endif %}PR {{ github_reference(number, "pull") }}{% endfor %}{% endfor %}</span>{% endif %}
{%- endmacro %}
{#- An assignment's pull request, with where it stands when that is known. An assignment with no pull request shows nothing. One that is ready for review stands out from a draft. -#}
{% macro pull_request_chip(number, summary, is_ready_for_review) -%}
  {% set text %}PR #{{ number }}{% if summary %} {{ summary }}{% endif %}{% endset -%}
  {% set class %}pr-chip{% if is_ready_for_review %} pr-chip-ready{% endif %}{% endset -%}
  {% if number is not none -%}
    {% if view.github_repository_url -%}
      <a class="{{ class }}" href="{{ view.github_repository_url }}/pull/{{ number }}" target="_blank" rel="noopener noreferrer">{{ text }}</a>
    {%- else -%}
      <span class="{{ class }}">{{ text }}</span>
    {%- endif %}
  {%- endif %}
{%- endmacro %}
{#- A card's first row: its issue and title, then what the caller gives, which is GitHub's state of what the card stands for. A work page gives its heading's tag and identifier. -#}
{% macro card_heading(number, title, heading="div", heading_id=none) -%}
  <div class="card-heading">
    <{{ heading }}{% if heading_id %} id="{{ heading_id }}"{% endif %}>{{ github_reference(number, "issues") }} <span class="title">{{ title }}</span></{{ heading }}>
    {{ caller() }}
  </div>
{%- endmacro %}