Function RemoveInversion

libs/editor/ui2oh.cpp:92–109

Returns a vector of Weekdays with no gaps and with Sunday as the last day. Exampls: su, mo, we -> mo, we, su; su, mo, fr, sa -> fr, sa, su, mo.

// su, mo, we -> mo, we, su;
// su, mo, fr, sa -> fr, sa, su, mo.
std::vector<osmoh::Weekday> RemoveInversion(editor::ui::OpeningDays const & days)
{
  std::vector<osmoh::Weekday> result(begin(days), end(days));
  if ((NextWeekdayNumber(result.back()) != WeekdayNumber(result.front()) && result.back() != osmoh::Weekday::Sunday) ||
      result.size() < 2)
    return result;

  auto inversion = adjacent_find(begin(result), end(result), [](osmoh::Weekday const a, osmoh::Weekday const b)
  { return NextWeekdayNumber(a) != WeekdayNumber(b); });

  if (inversion != end(result))
    rotate(begin(result), ++inversion, end(result));

  if (result.front() == osmoh::Weekday::Sunday)
    rotate(begin(result), begin(result) + 1, end(result));

  return result;
}

using Weekdays = std::vector<osmoh::Weekday>;