模块:倒计时

此模块的文档可以在模块:倒计时/doc创建

local p = {}

local function esc( s )
	s = tostring( s )
	s = s:gsub( '&', '&' )
	s = s:gsub( '<', '&lt;' )
	s = s:gsub( '>', '&gt;' )
	return s
end

function p.main( frame )
	local args = frame.args
	local s = tostring( args.date or '' )
	local y, mo, d = s:match( '^(%d+)-(%d+)-(%d+)' )
	if not y then
		return '<span style="color:#d33;">错误：缺少有效的 date 参数（格式 YYYY-MM-DD）</span>'
	end
	y, mo, d = tonumber( y ), tonumber( mo ), tonumber( d )
	if y < 1900 or y > 2100 or mo < 1 or mo > 12 or d < 1 or d > 31 then
		return '<span style="color:#d33;">错误：date 参数超出合理范围</span>'
	end

	local target = os.time{ year = y, month = mo, day = d, hour = 0, min = 0, sec = 0 }
	local nowt = os.date( '*t' )
	local today = os.time{ year = nowt.year, month = nowt.month, day = nowt.day, hour = 0, min = 0, sec = 0 }
	local diff = math.floor( ( target - today ) / 86400 + 0.5 )

	local ev = esc( args.event or '' )
	local evs = ''
	if ev ~= '' then
		evs = '<span class="dsh-bigcd-ev">' .. ev .. '</span>'
	end
	local num = '<span class="dsh-bigcd-num">'

	if diff > 0 then
		return '距离' .. evs .. '还有 ' .. num .. diff .. '</span> 天'
	elseif diff == 0 then
		if ev ~= '' then
			return evs .. '就是今天！'
		end
		return '目标日就是今天！'
	else
		return evs .. '已经 ' .. num .. ( -diff ) .. '</span> 天'
	end
end

return p