{# The lifetime line, defined ONCE and called from four surfaces: the index
   card (both lanes), the booth header (both branches) and the marks page.

   U4: a booth's lifetime is derived from its own state, and a booth that is
   not counting down must always SAY WHY — an invisible rule that silently
   stopped the clock would be strictly worse than the `.forever` boolean it
   replaces, because that one was at least visible as a lane.

   `hold` is the REASON, straight off `hold_reason()`, not a bool beside a
   string that can disagree with it. Kept wins over a hold because a kept booth
   is exempt either way, and showing two reasons for one EXEMPTION is the
   two-representations-of-one-state trap.

   Unreadable marks are the exception and ride along even on a kept board:
   damaged judgment is not a second exemption, it is a thing somebody has to go
   and fix, and the kept lane holds the durable boards — the ones where losing
   the operator's marks costs most. #}
{% macro lifetime(kept, hold, expires_in) -%}
  {%- if kept -%}
    kept{% if hold == "unreadable" %} · <span class="held held-broken" title="a mark in this booth cannot be read">marks unreadable</span>{% endif %}
  {%- elif hold == "unreadable" -%}
    <span class="held held-broken" title="a mark in this booth cannot be read, so the sweeper will not take it">held · marks unreadable</span>
  {%- elif hold == "open" -%}
    <span class="held" title="an unanswered question holds this booth open">held until answered</span>
  {%- else -%}
    expires in {{ expires_in|dur }}
  {%- endif -%}
{%- endmacro %}