{% macro week_group_header(week, csrf_token, return_to) -%}
  <header class="week-group-header {% if week.is_vacation_week %}is-vacation-week{% endif %}">
    <div class="week-group-header__left">
      <strong>KW{{ week.iso_week }}</strong>
      <span class="week-group-header__arrow">&rarr;</span>
      <span>{{ week.week_start.strftime("%d.%m.") }} - {{ week.week_end.strftime("%d.%m.") }}</span>
    </div>
    <p class="week-group-header__meta">
      Ist {{ minutes_to_hhmm(week.weekly_ist) }} | Soll {{ minutes_to_hhmm(week.weekly_soll) }} | Delta
      <span class="{% if week.weekly_delta < 0 %}negative{% else %}positive{% endif %}">{{ minutes_to_hhmm(week.weekly_delta) }}</span>
      | Urlaubstage {{ week.vacation_days }}
    </p>
    <form method="post"
          action="/vacation/week/toggle"
          class="inline-form week-group-header__action"
          data-async-refresh="view">
      <input type="hidden" name="csrf_token" value="{{ csrf_token }}" />
      <input type="hidden" name="week_start" value="{{ week.week_start.isoformat() }}" />
      <input type="hidden" name="week_end" value="{{ week.week_end.isoformat() }}" />
      <input type="hidden" name="return_to" value="{{ return_to }}" />
      <button type="submit"
              class="week-vacation-button {% if week.is_vacation_week %}is-active{% endif %}"
              title="Urlaub für ganze Woche umschalten"
              aria-label="Urlaub für ganze Woche umschalten">Urlaub</button>
    </form>
  </header>
{%- endmacro %}