-- This module powers {{countdown}}.  local p = {}  -- Constants local lang = mw.language.getContentLanguage() local getArgs = require('Module:Arguments').getArgs  function formatMessage(secondsLeft, event, color, refreshLink)  local timeLeft = lang:formatDuration(secondsLeft, {'years', 'weeks', 'days', 'hours', 'minutes', 'seconds'})  -- Find whether we are plural or not.  local isOrAre  if mw.ustring.match(timeLeft, '^%d+') == '1' then  isOrAre = 'is'  else  isOrAre = 'are'  end  -- Color and bold the numbers, because it makes them look important.  local timeLeft = mw.ustring.gsub(timeLeft, '(%d+)', '<span style="color: ' .. (color or '#F00') .. '; font-weight: bold;">%1</span>')  -- Make the refresh link and join it all together.  return mw.ustring.format('There %s %s until %s.%s', isOrAre, timeLeft, event, refreshLink) end  function p.main(frame)  local args = getArgs(frame)   if not (args.year and args.month and args.day) then  return '<strong class="error">Error: year, month, and day must be specified</strong>'  end   local eventTime = os.time{year=args.year, month=args.month, day=args.day, hour=args.hour, min=args.minute, sec=args.second}  local timeToStart = os.difftime(eventTime, os.time()) -- (future time - current time)   local refreshLink = mw.title.getCurrentTitle():fullUrl{action = 'purge'}  refreshLink = mw.ustring.format(' <small><span class="plainlinks">([%s refresh])</span></small>', refreshLink)  if timeToStart > 0 then  -- Event has not begun yet  return formatMessage(timeToStart, args.event or 'the event begins', args.color, refreshLink)  elseif args.duration then  local timeToEnd  if args['duration unit'] then  -- Duration is in unit other than seconds, use formatDate to add  timeToEnd = tonumber(lang:formatDate('U', '@' .. tostring(timeToStart) .. ' +' .. tostring(args.duration) .. ' ' .. args['duration unit']))  else  timeToEnd = timeToStart + tonumber(args.duration)  end  if timeToEnd > 0 then  -- Event is in progress  return args.eventstart .. refreshLink or formatMessage(timeToEnd, (args.event or 'the event') .. ' ends', args.color, refreshLink)  else  -- Event had a duration and has now ended  return ((args.eventend or ((lang:ucfirst(args.event) or 'The event') .. ' has ended.')) .. refreshLink)  end  else  -- Event had no duration and has begun  return ((args.eventstart or ((lang:ucfirst(args.event) or 'The event') .. ' has started.')) .. refreshLink)  end end  return p