Bước tới nội dung

Mô đun:Age

Trang mô đun bị khóa vô hạn
Bách khoa toàn thư mở Wikipedia
-- Implement various "age of" and other date-related templates.local mtext = {	-- Message and other text that should be localized.	['mt-bad-param1'] =             'Invalid parameter $1',	['mt-bad-param2'] =             'Parameter $1=$2 is invalid',	['mt-bad-show'] =               'Parameter show=$1 is not supported here',	['mt-cannot-add'] =             'Cannot add "$1"',	['mt-conflicting-show'] =       'Parameter show=$1 conflicts with round=$2',	['mt-date-wrong-order'] =       'The second date must be later in time than the first date',	['mt-dd-future'] =              'Death date (first date) must not be in the future',	['mt-dd-wrong-order'] =         'Death date (first date) must be later in time than the birth date (second date)',	['mt-invalid-bd-age'] =         'Invalid birth date for calculating age',	['mt-invalid-dates-age'] =      'Invalid dates for calculating age',	['mt-invalid-end'] =            'Invalid end date in second parameter',	['mt-invalid-start'] =          'Invalid start date in first parameter',	['mt-need-jdn'] =               'Need valid Julian date number',	['mt-need-valid-bd'] =          'Need valid birth date: year, month, day',	['mt-need-valid-bd2'] =         'Need valid birth date (second date): year, month, day',	['mt-need-valid-date'] =        'Need valid date',	['mt-need-valid-dd'] =          'Need valid death date (first date): year, month, day',	['mt-need-valid-ymd'] =         'Need valid year, month, day',	['mt-need-valid-ymd-current'] = 'Need valid year|month|day or "currentdate"',	['mt-need-valid-ymd2'] =        'Second date should be year, month, day',	['mt-template-bad-name'] =      'The specified template name is not valid',	['mt-template-x'] =             'The template invoking this must have "|template=x" where x is the wanted operation',	['txt-age'] =                   '(age&nbsp;',	['txt-aged'] =                  ' (aged&nbsp;',	['txt-and'] =                   ' và ',	['txt-comma-and'] =             ', và ',	['txt-error'] =                 'Error: ',	['txt-or'] =                    '&nbsp;or ',}local translate, from_en, to_en, isZeroif translate then	-- Functions to translate from en to local language and reverse go here.	-- See example at [[:bn:Module:বয়স]].else	from_en = function (text)		return text	end	isZero = function (text)		return tonumber(text) == 0	endendlocal _Date, _currentDatelocal function getExports(frame)	-- Return objects exported from the date module or its sandbox.	if not _Date then		local sandbox = frame:getTitle():find('sandbox', 1, true) and '/sandbox' or ''		local datemod = require('Module:Date' .. sandbox)		local realDate = datemod._Date		_currentDate = datemod._current		if to_en then			_Date = function (...)				local args = {}				for i, v in ipairs({...}) do					args[i] = to_en(v)				end				return realDate(unpack(args))			end		else			_Date = realDate		end	end	return _Date, _currentDateendlocal Collection  -- a table to hold itemsCollection = {	add = function (self, item)		if item ~= nil then			self.n = self.n + 1			self[self.n] = item		end	end,	join = function (self, sep)		return table.concat(self, sep)	end,	remove = function (self, pos)		if self.n > 0 and (pos == nil or (0 < pos and pos <= self.n)) then			self.n = self.n - 1			return table.remove(self, pos)		end	end,	sort = function (self, comp)		table.sort(self, comp)	end,	new = function ()		return setmetatable({n = 0}, Collection)	end}Collection.__index = Collectionlocal function stripToNil(text)	-- If text is a string, return its trimmed content, or nil if empty.	-- Otherwise return text (which may, for example, be nil).	if type(text) == 'string' then		text = text:match('(%S.-)%s*$')	end	return textendlocal function yes(parameter)	-- Return true if parameter should be interpreted as "yes".	-- Do not want to accept mixed upper/lowercase unless done by current templates.	-- Need to accept "on" because "round=on" is wanted.	return ({ y = true, yes = true, on = true })[parameter]endlocal function message(msg, id)	-- Return formatted message text for an error or warning.	local function getText(msg)		return mtext[msg] or error('Bug: message "' .. tostring(msg) .. '" not defined')	end	local text	if type(msg) == 'table' then		text = getText(msg[1])		local rep = {}		for i, v in ipairs(msg) do			if i > 1 then				rep['$' .. (i - 1)] = v			end		end		text = text:gsub('$%d+', rep)	else		text = getText(msg)	end	local categories = {		error = '[[Category:Age error]]',		warning = '[[Category:Age error]]',  -- same as error until determine whether 'Age warning' would be worthwhile	}	local a, b, category	if id == 'warning' then		a = '<sup>[<i>'		b = '</i>]</sup>'	else		a = '<strong class="error">' .. getText('txt-error')		b = '</strong>'	end	if mw.title.getCurrentTitle():inNamespaces(0) then		-- Category only in namespaces: 0=article.		category = categories[id or 'error']	end	return		a ..		mw.text.nowiki(text) ..		b ..		(category or '')endlocal function formatNumber(number)	-- Return the given number formatted with commas as group separators,	-- given that the number is an integer.	local numstr = tostring(number)	local length = #numstr	local places = Collection.new()	local pos = 0	repeat		places:add(pos)		pos = pos + 3	until pos >= length	places:add(length)	local groups = Collection.new()	for i = places.n, 2, -1 do		local p1 = length - places[i] + 1		local p2 = length - places[i - 1]		groups:add(numstr:sub(p1, p2))	end	return groups:join(',')endlocal function spellNumber(number, options, i)	-- Return result of spelling number, or	-- return number (as a string) if cannot spell it.	-- i == 1 for the first number which can optionally start with an uppercase letter.	number = tostring(number)	return require('Module:ConvertNumeric').spell_number(		number,		nil,                       -- fraction numerator		nil,                       -- fraction denominator		i == 1 and options.upper,  -- true: 'One' instead of 'one'		not options.us,            -- true: use 'and' between tens/ones etc		options.adj,               -- true: hyphenated		options.ordinal            -- true: 'first' instead of 'one'	) or numberendlocal function makeExtra(args, flagCurrent)	-- Return extra text that will be inserted before the visible result	-- but after any sort key.	local extra = args.prefix or ''	if mw.ustring.len(extra) > 1 then		-- Parameter "~" gives "~3" whereas "over" gives "over 3".		if extra:sub(-6, -1) ~= '&nbsp;' then			extra = extra .. ' '		end	end	if flagCurrent then		extra = '<span class="currentage"></span>' .. extra	end	return extraendlocal function makeSort(value, sortable)	-- Return a sort key if requested.	-- Assume value is a valid number which has not overflowed.	if sortable == 'sortable_table' or sortable == 'sortable_on' or sortable == 'sortable_debug' then		local sortKey		if value == 0 then			sortKey = '5000000000000000000'		else			local mag = math.floor(math.log10(math.abs(value)) + 1e-14)			if value > 0 then				sortKey = 7000 + mag			else				sortKey = 2999 - mag				value = value + 10^(mag+1)			end			sortKey = string.format('%d', sortKey) .. string.format('%015.0f', math.floor(value * 10^(14-mag)))		end		local result		if sortable == 'sortable_table' then			result = 'data-sort-value="_SORTKEY_"|'		elseif sortable == 'sortable_debug' then			result = '<span data-sort-value="_SORTKEY_♠"><span style="border:1px solid">_SORTKEY_♠</span></span>'		else			result = '<span data-sort-value="_SORTKEY_♠"></span>'		end		return result:gsub('_SORTKEY_', sortKey)	endendlocal translateParameters = {	abbr = {		off = 'abbr_off',		on = 'abbr_on',	},	disp = {		age = 'disp_age',		raw = 'disp_raw',	},	format = {		raw = 'format_raw',		commas = 'format_commas',	},	round = {		on = 'on',		yes = 'on',		months = 'ym',		weeks = 'ymw',		days = 'ymd',		hours = 'ymdh',	},	sep = {		comma = 'sep_comma',		[','] = 'sep_comma',		serialcomma = 'sep_serialcomma',		space = 'sep_space',	},	show = {		hide = { id = 'hide' },		y = { 'y', id = 'y' },		ym = { 'y', 'm', id = 'ym' },		ymd = { 'y', 'm', 'd', id = 'ymd' },		ymw = { 'y', 'm', 'w', id = 'ymw' },		ymwd = { 'y', 'm', 'w', 'd', id = 'ymwd' },		yd = { 'y', 'd', id = 'yd', keepZero = true },		m = { 'm', id = 'm' },		md = { 'm', 'd', id = 'md' },		w = { 'w', id = 'w' },		wd = { 'w', 'd', id = 'wd' },		h = { 'H', id = 'h' },		hm = { 'H', 'M', id = 'hm' },		hms = { 'H', 'M', 'S', id = 'hms' },		d = { 'd', id = 'd' },		dh = { 'd', 'H', id = 'dh' },		dhm = { 'd', 'H', 'M', id = 'dhm' },		dhms = { 'd', 'H', 'M', 'S', id = 'dhms' },		ymdh = { 'y', 'm', 'd', 'H', id = 'ymdh' },		ymdhm = { 'y', 'm', 'd', 'H', 'M', id = 'ymdhm' },		ymwdh = { 'y', 'm', 'w', 'd', 'H', id = 'ymwdh' },		ymwdhm = { 'y', 'm', 'w', 'd', 'H', 'M', id = 'ymwdhm' },	},	sortable = {		off = false,		on = 'sortable_on',		table = 'sortable_table',		debug = 'sortable_debug',	},}local spellOptions = {	cardinal = {},	Cardinal = { upper = true },	cardinal_us = { us = true },	Cardinal_us = { us = true, upper = true },	ordinal = { ordinal = true },	Ordinal = { ordinal = true, upper = true },	ordinal_us = { ordinal = true, us = true },	Ordinal_us = { ordinal = true, us = true, upper = true },}local function dateExtract(frame)	-- Return part of a date after performing an optional operation.	local Date = getExports(frame)	local args = frame:getParent().args	local parms = {}	for i, v in ipairs(args) do		parms[i] = v	end	if yes(args.fix) then		table.insert(parms, 'fix')	end	if yes(args.partial) then		table.insert(parms, 'partial')	end	local show = stripToNil(args.show) or 'dmy'	local date = Date(unpack(parms))	if not date then		if show == 'format' then			return 'error'		end		return message('mt-need-valid-date')	end	local add = stripToNil(args.add)	if add then		for item in add:gmatch('%S+') do			date = date + item			if not date then				return message({ 'mt-cannot-add', item })			end		end	end	local sortKey, result	local sortable = translateParameters.sortable[args.sortable]	if sortable then		local value = (date.partial and date.partial.first or date).jdz		sortKey = makeSort(value, sortable)	end	if show ~= 'hide' then		result = date[show]		if result == nil then			result = from_en(date:text(show))		elseif type(result) == 'boolean' then			result = result and '1' or '0'		else			result = from_en(tostring(result))		end	end	return (sortKey or '') .. makeExtra(args) .. (result or '')endlocal function rangeJoin(range)	-- Return text to be used between a range of ages.	return range == 'dash' and '–' or mtext['txt-or']endlocal function makeText(values, components, names, options, noUpper)	-- Return wikitext representing an age or duration.	local text = Collection.new()	local count = #values	local sep = names.sep or ''	for i, v in ipairs(values) do		-- v is a number (say 4 for 4 years), or a table ({4,5} for 4 or 5 years).		local islist = type(v) == 'table'		if (islist or v > 0) or (text.n == 0 and i == count) or (text.n > 0 and components.keepZero) then			local fmt, vstr			if options.spell then				fmt = function(number)					return spellNumber(number, options.spell, noUpper or i)				end			elseif i == 1 and options.format == 'format_commas' then				-- Numbers after the first should be small and not need formatting.				fmt = formatNumber			else				fmt = tostring			end			if islist then				vstr = fmt(v[1]) .. rangeJoin(options.range)				noUpper = true				vstr = vstr .. fmt(v[2])			else				vstr = fmt(v)			end			local name = names[components[i]]			if name then				local plural = names.plural				if not plural or (islist and v[2] or v) == 1 then					plural = ''				end				text:add(vstr .. sep .. name .. plural)			else				text:add(vstr)			end		end	end	local first, last	if options.join == 'sep_space' then		first = ' '		last = ' '	elseif options.join == 'sep_comma' then		first = ', '		last = ', '	elseif options.join == 'sep_serialcomma' and text.n > 2 then		first = ', '		last = mtext['txt-comma-and']	else		first = ', '		last = mtext['txt-and']	end	for i, v in ipairs(text) do		if i < text.n then			text[i] = v .. (i + 1 < text.n and first or last)		end	end	local sign = ''	if options.isnegative then		-- Do not display negative zero.		if text.n > 1 or (text.n == 1 and text[1]:sub(1, 1) ~= '0' ) then			if options.format == 'format_raw' then				sign = '-'  -- plain hyphen so result can be used in a calculation			else				sign = '−'  -- Unicode U+2212 MINUS SIGN			end		end	end	return		(options.sortKey or '') ..		(options.extra or '') ..		sign ..		text:join() ..		(options.suffix or '')endlocal function dateDifference(parms)	-- Return a formatted date difference using the given parameters	-- which have been validated.	local names = {		abbr_off = {			plural = '',			sep = '&nbsp;',			y = 'năm',			m = 'tháng',			w = 'tuần',			d = 'ngày',			H = 'giờ',			M = 'phút',			S = 'giây',		},		abbr_on = {			y = 'y',			m = 'm',			w = 'w',			d = 'd',			H = 'h',			M = 'm',			S = 's',		},		abbr_infant = {      -- for {{age for infant}}			plural = 's',			sep = '&nbsp;',			y = 'yr',			m = 'mo',			w = 'wk',			d = 'day',			H = 'hr',			M = 'min',			S = 'sec',		},		abbr_raw = {},	}	local diff = parms.diff  -- must be a valid date difference	local show = parms.show  -- may be nil; default is set below	local abbr = parms.abbr or 'abbr_off'	local defaultJoin	if abbr ~= 'abbr_off' then		defaultJoin = 'sep_space'	end	if not show then		show = 'ymd'		if parms.disp == 'disp_age' then			if diff.years < 3 then				defaultJoin = 'sep_space'				if diff.years >= 1 then					show = 'ym'				else					show = 'md'				end			else				show = 'y'			end		end	end	if type(show) ~= 'table' then		show = translateParameters.show[show]	end	if parms.disp == 'disp_raw' then		defaultJoin = 'sep_space'		abbr = 'abbr_raw'	elseif parms.wantSc then		defaultJoin = 'sep_serialcomma'	end	local diffOptions = {		round = parms.round,		duration = parms.wantDuration,		range = parms.range and true or nil,	}	local sortKey	if parms.sortable then		local value = diff.age_days + (parms.wantDuration and 1 or 0)  -- days and fraction of a day		if diff.isnegative then			value = -value		end		sortKey = makeSort(value, parms.sortable)	end	local textOptions = {		extra = parms.extra,		format = parms.format,		join = parms.sep or defaultJoin,		isnegative = diff.isnegative,		range = parms.range,		sortKey = sortKey,		spell = parms.spell,		suffix = parms.suffix,  -- not currently used	}	if show.id == 'hide' then		return sortKey or ''	end	local values = { diff:age(show.id, diffOptions) }	if values[1] then		return makeText(values, show, names[abbr], textOptions)	end	if diff.partial then		-- Handle a more complex range such as		-- {{age_yd|20 Dec 2001|2003|range=yes}} → 1 year, 12 days or 2 years, 11 days		local opt = {			format = textOptions.format,			join = textOptions.join,			isnegative = textOptions.isnegative,			spell = textOptions.spell,		}		return			(textOptions.sortKey or '') ..			makeText({ diff.partial.mindiff:age(show.id, diffOptions) }, show, names[abbr], opt) ..			rangeJoin(textOptions.range) ..			makeText({ diff.partial.maxdiff:age(show.id, diffOptions) }, show, names[abbr], opt, true) ..			(textOptions.suffix or '')	end	return message({ 'mt-bad-show', show.id })endlocal function getDates(frame, getopt)	-- Parse template parameters and return one of:	-- * date         (a date table, if single)	-- * date1, date2 (two date tables, if not single)	-- * text         (a string error message)	-- A missing date is optionally replaced with the current date.	-- If wantMixture is true, a missing date component is replaced	-- from the current date, so can get a bizarre mixture of	-- specified/current y/m/d as has been done by some "age" templates.	-- Some results may be placed in table getopt.	local Date, currentDate = getExports(frame)	getopt = getopt or {}	local function flagCurrent(text)		-- This allows the calling template to detect if the current date has been used,		-- that is, whether both dates have been entered in a template expecting two.		-- For example, an infobox may want the age when an event occurred, not the current age.		-- Don't bother detecting if wantMixture is used because not needed and it is a poor option.		if not text then			if getopt.noMissing then				return nil  -- this gives a nil date which gives an error			end			text = 'currentdate'			if getopt.flag == 'usesCurrent' then				getopt.usesCurrent = true			end		end		return text	end	local args = frame:getParent().args	local fields = {}	local isNamed = args.year or args.year1 or args.year2 or		args.month or args.month1 or args.month2 or		args.day or args.day1 or args.day2	if isNamed then		fields[1] = args.year1 or args.year		fields[2] = args.month1 or args.month		fields[3] = args.day1 or args.day		fields[4] = args.year2		fields[5] = args.month2		fields[6] = args.day2	else		for i = 1, 6 do			fields[i] = args[i]		end	end	local imax = 0	for i = 1, 6 do		fields[i] = stripToNil(fields[i])		if fields[i] then			imax = i		end		if getopt.omitZero and i % 3 ~= 1 then  -- omit zero months and days as unknown values but keep year 0 which is 1 BCE			if isZero(fields[i]) then				fields[i] = nil				getopt.partial = true			end		end	end	local fix = getopt.fix and 'fix' or ''	local partialText = getopt.partial and 'partial' or ''	local dates = {}	if isNamed or imax >= 3 then		local nrDates = getopt.single and 1 or 2		if getopt.wantMixture then			-- Cannot be partial since empty fields are set from current.			local components = { 'year', 'month', 'day' }			for i = 1, nrDates * 3 do				fields[i] = fields[i] or currentDate[components[i > 3 and i - 3 or i]]			end			for i = 1, nrDates do				local index = i == 1 and 1 or 4				dates[i] = Date(fields[index], fields[index+1], fields[index+2])			end		else			-- If partial dates are allowed, accept			--     year only, or			--     year and month only			-- Do not accept year and day without a month because that makes no sense			-- (and because, for example, Date('partial', 2001, nil, 12) sets day = nil, not 12).			for i = 1, nrDates do				local index = i == 1 and 1 or 4				local y, m, d = fields[index], fields[index+1], fields[index+2]				if (getopt.partial and y and (m or not d)) or (y and m and d) then					dates[i] = Date(fix, partialText, y, m, d)				elseif not y and not m and not d then					dates[i] = Date(flagCurrent())				end			end		end	else		getopt.textdates = true  -- have parsed each date from a single text field		dates[1] = Date(fix, partialText, flagCurrent(fields[1]))		if not getopt.single then			dates[2] = Date(fix, partialText, flagCurrent(fields[2]))		end	end	if not dates[1] then		return message(getopt.missing1 or 'mt-need-valid-ymd')	end	if getopt.single then		return dates[1]	end	if not dates[2] then		return message(getopt.missing2 or 'mt-need-valid-ymd2')	end	return dates[1], dates[2]endlocal function ageGeneric(frame)	-- Return the result required by the specified template.	-- Can use sortable=x where x = on/table/off/debug in any supported template.	-- Some templates default to sortable=on but can be overridden.	local name = frame.args.template	if not name then		return message('mt-template-x')	end	local args = frame:getParent().args	local specs = {		age_days = {                -- {{age in days}}			show = 'd',			disp = 'disp_raw',		},		age_days_nts = {            -- {{age in days nts}}			show = 'd',			disp = 'disp_raw',			format = 'format_commas',			sortable = 'on',		},		duration_days = {           -- {{duration in days}}			show = 'd',			disp = 'disp_raw',			duration = true,		},		duration_days_nts = {       -- {{duration in days nts}}			show = 'd',			disp = 'disp_raw',			format = 'format_commas',			sortable = 'on',			duration = true,		},		age_full_years = {          -- {{age}}			show = 'y',			abbr = 'abbr_raw',			flag = 'usesCurrent',			omitZero = true,			range = 'no',		},		age_full_years_nts = {      -- {{age nts}}			show = 'y',			abbr = 'abbr_raw',			format = 'format_commas',			sortable = 'on',		},		age_in_years = {            -- {{age in years}}			show = 'y',			abbr = 'abbr_raw',			negative = 'error',			range = 'dash',		},		age_in_years_nts = {        -- {{age in years nts}}			show = 'y',			abbr = 'abbr_raw',			negative = 'error',			range = 'dash',			format = 'format_commas',			sortable = 'on',		},		age_infant = {              -- {{age for infant}}			-- Do not set show because special processing is done later.			abbr = yes(args.abbr) and 'abbr_infant' or 'abbr_off',			disp = 'disp_age',			sep = 'sep_space',			sortable = 'on',		},		age_m = {                   -- {{age in months}}			show = 'm',			disp = 'disp_raw',		},		age_w = {                   -- {{age in weeks}}			show = 'w',			disp = 'disp_raw',		},		age_wd = {                  -- {{age in weeks and days}}			show = 'wd',		},		age_yd = {                  -- {{age in years and days}}			show = 'yd',			format = 'format_commas',			sep = args.sep ~= 'and' and 'sep_comma' or nil,		},		age_yd_nts = {              -- {{age in years and days nts}}			show = 'yd',			format = 'format_commas',			sep = args.sep ~= 'and' and 'sep_comma' or nil,			sortable = 'on',		},		age_ym = {                  -- {{age in years and months}}			show = 'ym',			sep = 'sep_comma',		},		age_ymd = {                 -- {{age in years, months and days}}			show = 'ymd',			range = true,		},		age_ymwd = {                -- {{age in years, months, weeks and days}}			show = 'ymwd',			wantMixture = true,		},	}	local spec = specs[name]	if not spec then		return message('mt-template-bad-name')	end	if name == 'age_days' then		local su = stripToNil(args['show unit'])		if su then			if su == 'abbr' or su == 'full' then				spec.disp = nil				spec.abbr = su == 'abbr' and 'abbr_on' or nil			end		end	end	local partial, autofill	local range = stripToNil(args.range) or spec.range	if range then		-- Suppose partial dates are used and age could be 11 or 12 years.		-- "|range=" (empty value) has no effect (spec is used).		-- "|range=yes" or spec.range == true sets range = true (gives "11 or 12")		-- "|range=dash" or spec.range == 'dash' sets range = 'dash' (gives "11–12").		-- "|range=no" or spec.range == 'no' sets range = nil and fills each date in the diff (gives "12").		--     ("on" is equivalent to "yes", and "off" is equivalent to "no").		-- "|range=OTHER" sets range = nil and rejects partial dates.		range = ({ dash = 'dash', off = 'no', no = 'no', [true] = true })[range] or yes(range)		if range then			partial = true  -- accept partial dates with a possible age range for the result			if range == 'no' then				autofill = true  -- missing month/day in first or second date are filled from other date or 1				range = nil			end		end	end	local getopt = {		fix = yes(args.fix),		flag = stripToNil(args.flag) or spec.flag,		omitZero = spec.omitZero,		partial = partial,		wantMixture = spec.wantMixture,	}	local date1, date2 = getDates(frame, getopt)	if type(date1) == 'string' then		return date1	end	local format = stripToNil(args.format)	local spell = spellOptions[format]	if format then		format = 'format_' .. format	elseif name == 'age_days' and getopt.textdates then		format = 'format_commas'	end	local parms = {		diff = date2:subtract(date1, { fill = autofill }),		wantDuration = spec.duration or yes(args.duration),		range = range,		wantSc = yes(args.sc),		show = args.show == 'hide' and 'hide' or spec.show,		abbr = spec.abbr,		disp = spec.disp,		extra = makeExtra(args, getopt.usesCurrent and format ~= 'format_raw'),		format = format or spec.format,		round = yes(args.round),		sep = spec.sep,		sortable = translateParameters.sortable[args.sortable or spec.sortable],		spell = spell,	}	if (spec.negative or frame.args.negative) == 'error' and parms.diff.isnegative then		return message('mt-date-wrong-order')	end	return from_en(dateDifference(parms))endlocal function bda(frame)	-- Implement [[Template:Birth date and age]].	local args = frame:getParent().args	local options = {		missing1 = 'mt-need-valid-bd',		noMissing = true,		single = true,	}	local date = getDates(frame, options)	if type(date) == 'string' then		return date  -- error text	end	local Date = getExports(frame)	local diff = Date('currentdate') - date	if diff.isnegative or diff.years > 150 then		return message('mt-invalid-bd-age')	end	local disp, show = 'disp_raw', 'y'	if diff.years < 2 then		disp = 'disp_age'		if diff.years == 0 and diff.months == 0 then			show = 'd'		else			show = 'm'		end	end	local df = stripToNil(args.df)  -- day first (dmy); default is month first (mdy)	local result = '(<span class="bday">%-Y-%m-%d</span>) </span>' ..					(df and '%-d %B %-Y' or '%B %-d, %-Y')	result = from_en('<span style="display:none"> ' ..		date:text(result) ..		'<span class="noprint ForceAgeToShow"> ' ..		mtext['txt-age'] ..		dateDifference({			diff = diff,			show = show,			abbr = 'abbr_off',			disp = disp,			sep = 'sep_space',		}) ..		')</span>')	local warnings = tonumber(frame.args.warnings)	if warnings and warnings > 0 then		local good = {			df = true,			mf = true,			day = true,			day1 = true,			month = true,			month1 = true,			year = true,			year1 = true,		}		local invalid		local imax = options.textdates and 1 or 3		for k, _ in pairs(args) do			if type(k) == 'number' then				if k > imax then					invalid = tostring(k)					break				end			else				if not good[k] then					invalid = k					break				end			end		end		if invalid then			result = result .. message({ 'mt-bad-param1', invalid }, 'warning')		end	end	return resultendlocal function dda(frame)	-- Implement [[Template:Death date and age]].	local args = frame:getParent().args	local options = {		missing1 = 'mt-need-valid-dd',		missing2 = 'mt-need-valid-bd2',		noMissing = true,		partial = true,	}	local date1, date2 = getDates(frame, options)	if type(date1) == 'string' then		return date1	end	local diff = date1 - date2	if diff.isnegative then		return message('mt-dd-wrong-order')	end	local Date = getExports(frame)	local today = Date('currentdate') + 1  -- one day in future allows for timezones	if date1 > today then		return message('mt-dd-future')	end	local years	if diff.partial then		years = diff.partial.years		years = type(years) == 'table' and years[2] or years	else		years = diff.years	end	if years > 150 then		return message('mt-invalid-dates-age')	end	local df = stripToNil(args.df)  -- day first (dmy); default is month first (mdy)	local result	if date1.day then  -- y, m, d known		result = (df and			'%-d %B %-Y' or			'%B %-d, %-Y') ..			'<span style="display:none">(%-Y-%m-%d)</span>'	elseif date1.month then  -- y, m known; d unknown		result =			'%B %-Y' ..			'<span style="display:none">(%-Y-%m-00)</span>'	else  -- y known; m, d unknown		result =			'%-Y' ..			'<span style="display:none">(%-Y-00-00)</span>'	end	result = from_en(date1:text(result) ..		mtext['txt-aged'] ..		dateDifference({			diff = diff,			show = 'y',			abbr = 'abbr_off',			disp = 'disp_raw',			range = 'dash',			sep = 'sep_space',		}) ..		')')	local warnings = tonumber(frame.args.warnings)	if warnings and warnings > 0 then		local good = {			df = true,			mf = true,		}		local invalid		local imax = options.textdates and 2 or 6		for k, _ in pairs(args) do			if type(k) == 'number' then				if k > imax then					invalid = tostring(k)					break				end			else				if not good[k] then					invalid = k					break				end			end		end		if invalid then			result = result .. message({ 'mt-bad-param1', invalid }, 'warning')		end	end	return resultendlocal function dateToGsd(frame)	-- Implement [[Template:Gregorian serial date]].	-- Return Gregorian serial date of the given date, or the current date.	-- The returned value is negative for dates before 1 January 1 AD	-- despite the fact that GSD is not defined for such dates.	local date = getDates(frame, { wantMixture=true, single=true })	if type(date) == 'string' then		return date	end	return tostring(date.gsd)endlocal function jdToDate(frame)	-- Return formatted date from a Julian date.	-- The result includes a time if the input includes a fraction.	-- The word 'Julian' is accepted for the Julian calendar.	local Date = getExports(frame)	local args = frame:getParent().args	local date = Date('juliandate', args[1], args[2])	if date then		return from_en(date:text())	end	return message('mt-need-jdn')endlocal function dateToJd(frame)	-- Return Julian date (a number) from a date which may include a time,	-- or the current date ('currentdate') or current date and time ('currentdatetime').	-- The word 'Julian' is accepted for the Julian calendar.	local Date = getExports(frame)	local args = frame:getParent().args	local date = Date(args[1], args[2], args[3], args[4], args[5], args[6], args[7])	if date then		return tostring(date.jd)	end	return message('mt-need-valid-ymd-current')endlocal function timeInterval(frame)	-- Implement [[Template:Time interval]].	-- There are two positional arguments: date1, date2.	-- The default for each is the current date and time.	-- Result is date2 - date1 formatted.	local Date = getExports(frame)	local args = frame:getParent().args	local parms = {		extra = makeExtra(args),		wantDuration = yes(args.duration),		range = yes(args.range) or (args.range == 'dash' and 'dash' or nil),		wantSc = yes(args.sc),	}	local fix = yes(args.fix) and 'fix' or ''	local date1 = Date(fix, 'partial', stripToNil(args[1]) or 'currentdatetime')	if not date1 then		return message('mt-invalid-start')	end	local date2 = Date(fix, 'partial', stripToNil(args[2]) or 'currentdatetime')	if not date2 then		return message('mt-invalid-end')	end	parms.diff = date2 - date1	for argname, translate in pairs(translateParameters) do		local parm = stripToNil(args[argname])		if parm then			parm = translate[parm]			if parm == nil then  -- test for nil because false is a valid setting				return message({ 'mt-bad-param2', argname, args[argname] })			end			parms[argname] = parm		end	end	if parms.round then		local round = parms.round		local show = parms.show		if round ~= 'on' then			if show then				if show.id ~= round then					return message({ 'mt-conflicting-show', args.show, args.round })				end			else				parms.show = translateParameters.show[round]			end		end		parms.round = true	end	return from_en(dateDifference(parms))endreturn {	age_generic = ageGeneric,           -- can emulate several age templates	birth_date_and_age = bda,           -- Template:Birth_date_and_age	death_date_and_age = dda,           -- Template:Death_date_and_age	gsd = dateToGsd,                    -- Template:Gregorian_serial_date	extract = dateExtract,              -- Template:Extract	jd_to_date = jdToDate,              -- Template:?	JULIANDAY = dateToJd,               -- Template:JULIANDAY	time_interval = timeInterval,       -- Template:Time_interval}