Mô đun:Calendar date

--[[ Display Gregorian date of a holiday that moves year to year. Date data can be obtained from multiple sources as configured in Module:Calendar date/events  "localfile" = local data file (eg. https://en.wikipedia.org/wiki/Template:Calendar_date/localfiles/Hanukkah)  "calculator" = user-supplied date calculator   "wikidata" = <tbd> for holidays with their own date entity page such as https://www.wikidata.org/wiki/Q51224536                ]]require('strict')local p = {}local cfg						-- Data structure from ~/eventslocal eventdata					-- Data structure from ~/localfiles/<holiday name>local track = {}				-- Tracking category container--[[--------------------------< inlineError >-----------------------     Critical error. Render output completely in red. Add to tracking category. ]]local function inlineError(arg, msg, tname)	track["Category:Calendar date template errors"] = 1	return '<span style="font-size:100%" class="error citation-comment">Error in {{' .. tname .. '}} - Check <code style="color:inherit; border:inherit; padding:inherit;">&#124;' .. arg .. '=</code>  ' .. msg .. '</span>'end--[[--------------------------< trimArg >-----------------------	 trimArg returns nil if arg is "" while trimArg2 returns 'true' if arg is "" 	 trimArg2 is for args that might accept an empty value, as an on/off switch like nolink= ]]local function trimArg(arg)	if arg == "" or arg == nil then		return nil	else		return mw.text.trim(arg)	endendlocal function trimArg2(arg)	if arg == nil then		return nil	else		return mw.text.trim(arg)	endend--[[--------------------------< tableLength >-----------------------	Given a 1-D table, return number of elements  ]]local function tableLength(T)	local count = 0	for _ in pairs(T) do count = count + 1 end	return countend--[[-------------------------< make_wikilink >----------------------------------------------------	Makes a wikilink; when both link and display text is provided, returns a wikilink in the form [ [L|D] ]; if only	link is provided, returns a wikilink in the form [ [L] ]; if neither are provided or link is omitted, returns an	empty string.  ]]local function make_wikilink (link, display, no_link)	if nil == no_link then		if link and ('' ~= link) then			if display and ('' ~= display) then				return table.concat ({'[[', link, '|', display, ']]'});			else				return table.concat ({'[[', link, ']]'});			end		end	else																		-- no_link		if display and ('' ~= display) then										-- if there is display text			return display;														-- return that		else			return link or '';													-- return the target article name or empty string		end	endend--[[--------------------------< createTracking >-----------------------	Return data in track[] ie. tracking categories  ]]local function createTracking()	local out = {};	if tableLength(track) > 0 then		for key, _ in pairs(track) do											-- loop through table			table.insert (out, make_wikilink (key))								-- and convert category names to links		end	end	return table.concat (out)													-- concat into one big string; empty string if table is emptyend--[[--------------------------< isValidDate >----------------------------------------------------	Returns true if date is after 31 December 1899 , not after 2100, and represents a valid date 	(29 February 2017 is not a valid date).  Applies Gregorian leapyear rules. All arguments are required.]]local function isValidDate (year, month, day)	local days_in_month = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}	local month_length	local y, m, d	local today = os.date ('*')										-- fetch a table of current date parts	if not year or year == '' or not month or month == '' or not day or day == '' then		return false												-- something missing	end	y = tonumber (year)	m = tonumber (month)	d = tonumber (day)	if 1900 > y or 2100 < y or 1 > m or 12 < m then					-- year and month are within bounds		return false	end	if (2==m) then													-- if February		month_length = 28											-- then 28 days unless		if (0==(y%4) and (0~=(y%100) or 0==(y%400))) then			-- is a leap year?			month_length = 29										-- if leap year then 29 days in February		end	else		month_length=days_in_month[m];	end	if 1 > d or month_length < d then								-- day is within bounds		return false	end		return trueend--[[--------------------------< makeDate >-----------------------	Given a zero-padded 4-digit year, 2-digit month and 2-digit day, return a full date in df format	df = mdy, dmy, iso, ymd ]]local function makeDate(year, month, day, df, format)	local formatFull = {		['dmy'] = 'j F Y',		['mdy'] = 'F j, Y',		['ymd'] = 'Y F j',		['iso'] = 'Y-m-d'	}	local formatInfobox = {		['dmy'] = 'j F',		['mdy'] = 'F j',		['ymd'] = 'F j',		['iso'] = 'Y-m-d'	}	if not year or year == "" or not month or month == "" or not day or day == "" and format[df] then		return nil	end	local date = table.concat ({year, month, day})               -- assemble iso format date	if format ~= "infobox" then		return mw.getContentLanguage():formatDate (formatFull[df], date)	else		return mw.getContentLanguage():formatDate (formatInfobox[df], date)	endend--[[--------------------------< dateOffset >-----------------------	Given a 'origdate' in ISO format, return the date offset by number of days in 'offset' 		eg. given "2018-02-01" and "-1" it will return "2018-01-30"	On error, return origdate  ]]local function dateOffset(origdate, offset)	local year, month, day = origdate:match ('(%d%d%d%d)-(%d%d)-(%d%d)')	local now = os.time{year = year, month = month, day = day}	local newdate = os.date("%Y-%m-%d", now + (tonumber(offset) * 24 * 3600))	return newdate and newdate or origdate  end--[[--------------------------< renderHoli >-----------------------	Render the data  ]]  local function renderHoli(cfg,eventdata,calcdate,date,df,format,tname,cite)	local hits = 0	local matchdate = "^" .. date	local startdate,enddate,outoffset,endoutoffset = nil	local starttitle,endtitle = ""  	-- user-supplied date calculator 	if cfg.datatype == "calculator" then		if cfg.datasource then			startdate = calcdate			enddate = dateOffset(startdate, cfg.days - 1)		else			return inlineError("holiday", 'invalid calculator result', tname )		end	-- read dates from localfile -- it assumes dates are in chrono order, need a more flexible method	elseif cfg.datatype == "localfile" then                                              		local numRecords = tableLength(eventdata) -- Get first and last date of holiday		for i = 1, numRecords do			if mw.ustring.find( eventdata[i].date, matchdate ) then				if hits == 0 then					startdate = eventdata[i].date					hits = 1				end				if hits >= tonumber(cfg.days) then					enddate = eventdata[i].date					break				end				hits = hits + 1			end		end	end     	-- Verify data and special conditions	if startdate == nil or enddate == nil then 		if cfg.name == "Hanukkah" and startdate and not enddate then  -- Hanukkah bug, template doesn't support cross-year boundary			enddate = dateOffset(startdate, 8)		elseif cfg.datatype == "localfile" and cfg.days > "1" and startdate then			enddate = dateOffset(startdate, cfg.days - 1)		elseif startdate and not enddate then			return inlineError("year", 'cannot find enddate', tname) .. createTracking()		else			return inlineError("holiday", 'cannot find startdate and enddate', tname) .. createTracking()		end	end     	-- Generate start-date offset (ie. holiday starts the evening before the given date)	if cfg.startoffset then		startdate = dateOffset(startdate, cfg.startoffset)		if startdate ~= enddate then			enddate = dateOffset(enddate, cfg.startoffset)		else			cfg.days = (cfg.days == "1") and "2"		end	end 	-- Generate end-date outside-Irael offset (ie. outside Israel the holiday ends +1 day later)	endoutoffset = cfg.endoutoffset and dateOffset(enddate, cfg.endoutoffset)	-- Format dates into df format 	local year, month, day = startdate:match ('(%d%d%d%d)-(%d%d)-(%d%d)')	startdate = makeDate(year, month, day, df, format)	year, month, day = enddate:match ('(%d%d%d%d)-(%d%d)-(%d%d)')	enddate = makeDate(year, month, day, df, format)	if startdate == nil or enddate == nil then return nil end	-- Add "outside of Israel" notices	if endoutoffset then		year, month, day = endoutoffset:match ('(%d%d%d%d)-(%d%d)-(%d%d)')		local leader = ((format == "infobox") and "<br>") or " "		endoutoffset = leader .. "(" .. makeDate(year, month, day, df, "infobox") .. " outside of Israel)"	end	if not endoutoffset then		endoutoffset = ""	end	--- Determine format string	format = ((format == "infobox") and " –<br>") or " – "	--- Determine pre-pended text string eg. "sunset, <date>"	local prepend1 = (cfg.prepend1 and (cfg.prepend1 .. ", ")) or ""	local prepend2 = (cfg.prepend2 and (cfg.prepend2 .. ", ")) or ""	-- return output	if startdate == enddate or cfg.days == "1" then            -- single date		return prepend1 .. startdate .. endoutoffset .. cite	else		return prepend1 .. startdate .. format .. prepend2 .. enddate .. endoutoffset .. cite	endend--[[--------------------------< calendardate >-----------------------     Main function  ]]function p.calendardate(frame)	local pframe = frame:getParent()	local args = pframe.args	local tname = "Calendar date"					-- name of calling template. Change if template rename.	local holiday = nil								-- name of holiday	local date = nil								-- date of holiday (year) 	local df = nil									-- date format (mdy, dmy, iso - default: iso)	local format = nil								-- template display format options	local cite = nil								-- leave a citation at end 	local calcdate = ""             	--- Determine holiday	holiday = trimArg(args.holiday)					-- required	if not holiday then		holiday = trimArg(args.event)				-- event alias		if not holiday then			return inlineError("holiday", 'missing holiday argument', tname) .. createTracking()		end	end	--- Determine date	date = trimArg(args.year)						-- required	if not date then		return inlineError("year", 'missing year argument', tname) .. createTracking()	elseif not isValidDate(date, "01", "01") then		return inlineError("year", 'invalid year', tname) .. createTracking()	end	--- Determine format type	format = trimArg(args.format)	if not format then		format = "none"	elseif format ~= "infobox" then		format = "none"	end 	-- Load configuration file	local eventsfile = mw.loadData ('Module:Calendar date/events')	if eventsfile.hebrew_calendar[mw.ustring.upper(holiday)] then		cfg = eventsfile.hebrew_calendar[mw.ustring.upper(holiday)]	elseif eventsfile.christian_events[mw.ustring.upper(holiday)] then		cfg = eventsfile.christian_events[mw.ustring.upper(holiday)]	elseif eventsfile.carnivals[mw.ustring.upper(holiday)] then		cfg = eventsfile.carnivals[mw.ustring.upper(holiday)]	elseif eventsfile.chinese_events[mw.ustring.upper(holiday)] then		cfg = eventsfile.chinese_events[mw.ustring.upper(holiday)]	elseif eventsfile.misc_events[mw.ustring.upper(holiday)] then		cfg = eventsfile.misc_events[mw.ustring.upper(holiday)]	else		return inlineError("holiday", 'unknown holiday ' .. holiday, tname) .. createTracking()	end	-- If datatype = localfile 	if cfg.datatype == "localfile" then		local eventfile = nil		eventfile = mw.loadData(cfg.datasource)		if eventfile.event then			eventdata = eventfile.event		else			return inlineError("holiday", 'unknown holiday file ' .. cfg.datasource .. '</span>', tname) .. createTracking()		end	-- If datatype = calculator	elseif cfg.datatype == "calculator" then		calcdate = frame:preprocess(cfg.datasource:gsub("YYYY", date))		local year, month, day = calcdate:match ('(%d%d%d%d)-(%d%d)-(%d%d)')		if not isValidDate(year, month, day) then			return inlineError("holiday", 'invalid calculated date ' .. calcdate, tname) .. createTracking()		end	else		return inlineError("holiday", 'unknown "datatype" in configuration', tname) .. createTracking()	end	--- Determine df - priority to |df in template, otherwise df in datafile, otherwise default to dmy	df = trimArg(args.df)	if not df then		df = (cfg.df and cfg.df) or "dmy"	end	if df ~= "mdy" and df ~= "dmy" and df ~= "iso" then		df = "dmy"	end	-- Determine citation	cite = trimArg2(args.cite)	if cite then		if (cite ~= "no") then			cite = ""			if cfg.citeurl and cfg.accessdate and cfg.source and cfg.name then				local citetitle = cfg.citetitle				if citetitle == nil then					citetitle = 'Dates for ' .. cfg.name				end				cite = frame:preprocess('<ref name="' .. holiday .. ' dates">{{cite web |url=' .. cfg.citeurl .. ' |title=' .. citetitle .. ' |publisher=' .. cfg.source .. '|accessdate=' .. cfg.accessdate .. '}}</ref>')			elseif cfg.source then				cite = frame:preprocess('<ref name="' .. holiday .. ' dates">' .. cfg.source:gsub("YYYY", date) .. '</ref>')			else				cite = ""			end		else			cite = ""		end	else		cite = ""	end	-- Render 	local rend = renderHoli( cfg,eventdata,calcdate,date,df,format,tname,cite)	if not rend then		rend = '<span style="font-size:100%" class="error citation-comment">Error in [[:Template:' .. tname .. ']]: Unknown problem. Please report on template talk page.</span>'		track["Category:Webarchive template errors"] = 1 	end	return rend .. createTracking()endreturn p