وحدة:Year in other calendars

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-- Load dependencies.
local getArgs = require('Module:Arguments').getArgs
local numToRoman = require( 'Module:Roman' ).main
local getOlympiad = require( 'Module:Ancient Olympiads' )._main
local getDynasty = require( 'Module:Ancient Egypt era' )._main
local getPharaoh = require( 'Module:Ancient Egypt kings' )._main
local numToArmenian = require( 'Module:Armenian' ).main
local getRegnal = require( 'Module:British regnal year' ).main
local japaneseEra = require( 'Module:Japanese calendar' ).era()

-- Define constants.
local lang = mw.language.getContentLanguage()
local currentYear = tonumber( lang:formatDate( 'Y' ) )

--------------------------------------------------------------------
-- Helper functions
--------------------------------------------------------------------

local function isInteger( num )
	-- Checks if a value is an integer. If so, returns the value converted to a number.
	-- If not, returns false.
	num = tonumber( num )
	if num and math.floor( num ) == num and num ~= math.huge then
		return num
	else
		return false
	end
end

local function BCToNum( s )
	-- Converts strings of the format "n BC" to their corresponding
	-- numerical values.
	if type( s ) ~= 'string' then
		return nil
	end
	s = mw.ustring.match( mw.ustring.upper( s ), '^([1-9]%d*)%s*ق م$' )
	if not s then
		return nil
	end
	local num = tonumber( s )
	num = ( num - 1 ) * -1
	return num
end

local function numToBC( num )
	-- For BC years, returns a string with the year name appended with " BC".
	-- Otherwise returns nil.
	num = isInteger( num )
	if not num then return end
	if num <= 0 then
		return string.format( '%d ق م', 1 - num )
	end
end

local function formatNegative(s)
	-- Replaces hyphens in a string with minus signs if the hyphen comes before a number.
	s = mw.ustring.gsub( s, '%-(%d)', '−%1' )
	return s
end

--------------------------------------------------------------------
-- Calendar box class definition
--------------------------------------------------------------------

local calendarBox = {}
calendarBox.__index = calendarBox

function calendarBox:new( init )
	init = type( init ) == 'table' and init or {}
	local obj = {}
	local pagename = mw.title.getCurrentTitle().text

	-- Set the year. If the year is specified as an argument, use that.
	-- Otherwise, use the page name if it is valid. If the pagename isn't
	-- valid, use the current year.
	local yearNum = isInteger( init.year )
	if yearNum then -- First, see if the year parameter is a number.
		self.year = yearNum
	else
		local yearBC = BCToNum( init.year )
		if yearBC then -- Second, see if the year parameter is a "yyyy ق م" string.
			self.year = yearBC
		else
			local pageNum = isInteger( pagename )
			if pageNum then -- Third, see if the pagename is an integer.
				self.year = pageNum
			else
				local pageBC = BCToNum( pagename )
				if pageBC then -- Fourth, see if the pagename is a "yyyy ق م" string.
					self.year = pageBC
				else
					self.year = currentYear -- If none of the above apply, use the current year.
				end
			end
		end
	end

	-- Set year text values.
	self.BCYearName = numToBC( self.year )
	if self.BCYearName then
		self.yearText = self.BCYearName
	else
		self.yearText = tostring( self.year )
	end

	-- Set other fields.
	self.caption = self.yearText
	self.footnotes = init.footnotes
	self.navbar = init.navbar

	return setmetatable( obj, {
			__index = self
		})
end

function calendarBox:setCaption( s )
	-- Sets the calendar box caption.
	if type( s ) ~= 'string' or s == '' then return end
	self.caption = s
end

function calendarBox:addCalendar( obj )
	-- Adds a calendar or a calendar group.
	if type( obj ) ~= 'table' and type( obj.new ) ~= 'function' then return end -- Exit if the object is invalid.
	self.calendars = self.calendars or {}
	table.insert( self.calendars, obj )
end

-- Add an alias for adding calendar groups. The function is the same, but it might be confusing for users
-- to have to use the name "addCalendar" for a calendar group.
calendarBox.addCalendarGroup = calendarBox.addCalendar

function calendarBox:export()
	-- Outputs the calendar box wikitext.
	local root = mw.html.create( 'table' )
	-- Export the calendar box headers.
	root
	:addClass( 'infobox vevent' )
	:css( 'width', '22em' )
	:tag( 'caption' )
	:css( 'font-size', '125%' )
	:tag( 'span' )
	:addClass( 'summary dtstart' )
	:wikitext( self.caption )

	-- Export the calendars and calendar groups. "calendar:export()" works for both kinds
	-- of objects. Some export functions can return nil, so we need to check for that.
	if type( self.calendars ) == 'table' then
		for _, calendar in ipairs( self.calendars ) do
			local calendarText = calendar:export()
			if type( calendarText ) == 'string' then
				root:wikitext( calendarText )
			end
		end
	end

	-- Add footnotes.
	if type( self.footnotes ) == 'string' and self.footnotes ~= '' then
		root
		:tag( 'tr' )
		:tag( 'td' )
		:attr( 'colspan', '2' )
		:wikitext( string.format( '<small>%s</small>', self.footnotes ) )
	end

	-- Add navbar.
	if type( self.navbar ) == 'string' and self.navbar ~= '' then
		root
		:tag( 'tr' )
		:tag( 'td' )
		:attr( 'colspan', '2' )
		:css( 'text-align', 'center' )
		:wikitext( require('Module:Navbar')._navbar{ self.navbar } )
	end

	return tostring( root )
end


--------------------------------------------------------------------
-- Calendar group class definition
--------------------------------------------------------------------

--  Calendar groups are used to group different calendars together. 
--  Previously, the template did this by including a table row with
--  no year value. By using objects we can do the same thing more
--  semantically.

local calendarGroup = {}
calendarGroup.__index = calendarGroup

function calendarGroup:new( init )
	init = type( init ) == 'table' and init or {}
	local obj = {}

	-- Get the heading and throw an error if it is invalid.
	obj.heading = init.heading
	if type( obj.heading ) ~= 'string' then
		error( 'calendarGroup: no heading detected' )
	end

	-- Set the metatable and return the object.
	self.__index = self
	return setmetatable( obj, {
			__index = self
		})
end

function calendarGroup:addCalendar( calendar )
	-- Adds a calendar object to the calendar group.
	self.calendars = self.calendars or {}
	if type( calendar ) == 'table' and type( calendar.getLink ) == 'function' then
		table.insert( self.calendars, calendar )
	end
end

function calendarGroup:export()
	-- Exports the calendar group's wikitext.
	-- Indent and italicise each calendar's link if it exists.
	for i, calendar in ipairs( self.calendars ) do
		local link = calendar:getLink()
		if type( link ) == 'string' then
			self.calendars[ i ]:setRawLink( string.format( "&nbsp;- ''%s''", link ) )
		end
	end
	-- Create the heading row html and export the calendar objects.
	local ret = mw.html.create()
	ret
	:tag( 'tr' )
	:tag( 'td' )
	:wikitext( self.heading )
	:done()
	:tag( 'td' ) -- Use a blank tag to make the html look nice.
	:allDone()
	for _, calendar in ipairs( self.calendars ) do
		ret:wikitext( calendar:export() )
	end
	return tostring( ret )
end

--------------------------------------------------------------------
-- Calendar class definition
--------------------------------------------------------------------

local calendar = {}
calendar.__index = calendar
calendar.type = 'calendar'

function calendar:new()
	local obj = {}
	return setmetatable( obj, {
			__index = self
		})
end

function calendar:setLink( link, display )
	-- Sets the calendar's wikilink, with optional display text and italics.
	if type( link ) ~= 'string' or link == '' then return end
	display = type( display ) == 'string' and display ~= '' and display
	if display then
		self.link = string.format( '[[%s|%s]]', link, display )
	else
		self.link = string.format( '[[%s]]', link )
	end
end

function calendar:setRawLink( s )
	-- Sets the calendar's wikilink as raw wikitext.
	if type( s ) ~= 'string' or s == '' then return end
	self.link = s
end

function calendar:getLink()
	-- Returns the calendar's link value.
	return self.link
end

function calendar:setYear( year )
	-- Sets a single year. Can be passed either a string or a number.
	-- If passed as a number, it is formatted with minus signs instead of hyphens.
	-- If passed as a string, no minus-sign formatting occurs; this should be done in the individual calendar definitions.
	if type( year ) == 'number' then
		year = tostring( year )
		self.year = formatNegative( year )
	elseif type( year ) == 'string' then
		self.year = year
	end
end

function calendar:setYearRange( year1, year2 )
	-- Sets a year range. Must be passed two numbers.
	if type( year1 ) == 'number' and type( year2 ) == 'number' then
		local year
		if year1 < 0 or year2 < 0 then -- Leave a gap for negative years to avoid having a minus sign and a dash right next to each other.
			year = string.format( '%d – %d', year1, year2 )
			year = formatNegative( year )
		else
			year = string.format( '%d–%d', year1, year2 )
		end
		self.year = year
	end
end

function calendar:setYearCouple( year1, year2 )
	-- Same as setYearRange, only with a slash (/) in the middle. Must be passed two numbers. 
	-- Additional text possible, must be defined as follows: addtext = string.format( 'additional text or link')
	-- See example in Seleucid era calendar
	if type( year1 ) == 'number' and type( year2 ) == 'number' then
		local year
		if year1 < 0 or year2 < 0 then -- Leave no gap for negative years.
			year = string.format( '%d/%d %s', year1, year2, addtext )
			year = formatNegative( year )
		else
			year = string.format( '%d/%d %s', year1, year2, addtext )
		end
		self.year = year
	end
end

function calendar:export()
	-- Outputs the calendar wikitext.
	-- Exit if no link has been specified.
	local link = self.link
	if type( link ) ~= 'string' or link == '' then return end

	-- If no year has been specified, set the year value to N/A.
	local year = self.year
	if type( year ) ~= 'string' or year == '' then
		year = "''غ/م''"
	end

	-- Build the table row.
	local ret = mw.html.create()
	ret
	:tag( 'tr' )
	:tag( 'td' )
	:wikitext( link )
	:done()
	:tag( 'td' )
	:wikitext( year )
	:allDone()
	return tostring( ret )
end

--------------------------------------------------------------------
-- Build the box
--------------------------------------------------------------------

local function makeCalendarBox( args )
	-- Initiate the box and get the year values.
	local init = args
	init.navbar = 'السنة في التقاويم الأخرى'
	local box = calendarBox:new( init )
	local year = box.year
	local yearText = box.yearText

	-- Set the caption.
	box:setCaption( box.caption .. ' في التقاويم الأخرى' )

	----------------------------------------------------------------------
	-- التقويم الميلادي
	----------------------------------------------------------------------

	local gregorian = calendar:new()
	gregorian:setLink( 'تقويم ميلادي' )
	-- Get the year link.
	local gregcal = args.gregcal
	if type( gregcal ) == 'string' and gregcal ~= '' then
		gregorian.yearLink = string.format( '[[%s|%s]]', gregcal, yearText )
	else
		gregorian.yearLink = yearText
	end
	-- Set the year.
	gregorian.romanYear = numToRoman{ math.abs(year) } .. (year < 0 and ' ق م' or '')	if gregorian.romanYear then
		gregorian:setYear( string.format(
				[[%s<br /><span style="font-family: serif;">''%s''</span>]],
				gregorian.yearLink, gregorian.romanYear
				) )
	else
		gregorian:setYear( gregorian.yearLink )
	end
	box:addCalendar( gregorian ) 

	----------------------------------------------------------------------
	-- التقويم الإسلامي
	----------------------------------------------------------------------

	local islamic = calendar:new()
	islamic:setLink( 'تقويم هجري' )
	local islamicMult = 1.030684 -- the factor to multiply by
	local islamicSub = 621.5643 -- the factor to subtract by
	if year - 621 > 0 then
		local year1 = math.floor( islamicMult * ( year - islamicSub ) )
		local year2 = math.floor( islamicMult * ( year - islamicSub + 1 ) )
		islamic:setYearRange( year1, year2 )
	else
		local year1 = math.ceil( -islamicMult * ( year - islamicSub ) )
		local year2 = math.ceil( -islamicMult * ( year - islamicSub + 1 ) )
		islamic:setYear( string.format( '%d [[قبل الهجرة|ق هـ]]&nbsp;– %d [[قبل الهجرة|ق هـ]]', year1, year2 ) )
	end
	box:addCalendar( islamic )
	
	----------------------------------------------------------------------
	-- التقويم الهجري الشمسي
	----------------------------------------------------------------------

	local iranian = calendar:new()
	iranian:setLink( 'تقويم هجري شمسي', 'تقويم هجري شمسي' )
	if year - 621 > 0 then
		iranian:setYearRange( year - 622, year - 621 )
	else
		iranian:setYear( string.format( '%d BP&nbsp;– %d BP', 622 - year, 621 - year ) )
	end
	box:addCalendar( iranian )


	----------------------------------------------------------------------
	-- التقويم الأمازيغي
	----------------------------------------------------------------------

	local berber = calendar:new()
	berber:setLink( 'تقويم أمازيغي' )
	berber:setYear( year + 950 )
	box:addCalendar( berber )

	----------------------------------------------------------------------
	-- التقويم الجمهوري الفرنسي
	----------------------------------------------------------------------
	-- displays only in years 1793 - 1805 and 1871
	-- This calendar was in use and had defined years only for the short period on display.
	-- Its importance during these few years is also the reason why it should stay out of the alphabetic order.
	-- See discussion on talk page.
	----------------------------------------------------------------------
	
	if year >= 1793 and year < 1806 or year == 1871 then
		local republican = calendar:new()
		republican:setLink('تقويم جمهوري فرنسي')
		if year <= 1870 then
			republican:setYearRange( year - 1792, year - 1791 )
		elseif year == 1871 then
			republican:setYear( year - 1792 ) -- Paris Commune, May
		end
		box:addCalendar( republican )
	end
	
	----------------------------------------------------------------------
	-- Ab urbe condita
	-- Varro's correlation, from 1 AUC
	----------------------------------------------------------------------
	if year >= -752 then
		local abUrbe = calendar:new()
		abUrbe:setLink( 'من بداية روما' )
		abUrbe:setYear( year + 753 )
		box:addCalendar( abUrbe )
	end
	
	----------------------------------------------------------------------
	-- Ancient Egypt era 
	-- Displays dynasty between 1549 BC and 30 BC
	-- Displays pharaoh or king between 752 BC and 30 BC
	----------------------------------------------------------------------
	if year > -1549 and year <= -29 then
	local ancEgypt = calendar:new()
	ancEgypt:setLink(
			'Egyptian chronology',
			'حقبة مصر القديمة'
		)
	ancEgypt:setYear( getDynasty( year ) )
	box:addCalendar( ancEgypt )
	end
	if year > - 752 and year <= -29 then
	local ancPharaoh = calendar:new()
	ancPharaoh:setLink(
			'قائمة ملوك مصر القديمة',
			'<i>- الفرعون</i>'
		)
	ancPharaoh:setYear( getPharaoh( year ) )
	box:addCalendar( ancPharaoh )
	end

	----------------------------------------------------------------------
	-- أولمبياد القديمة
	-- Currently only the first 194 Olympiads
	-- May be expanded until 394 AD when data available
	----------------------------------------------------------------------
	if year >= -1300 and year < 1 then
	local ancOlympiads = calendar:new()
	ancOlympiads:setLink(
			'تقويم اليونان القديم',
			'حقبة اليونان القديم'
		)
	ancOlympiads:setYear( getOlympiad( year ) )
	box:addCalendar( ancOlympiads )
	end

	----------------------------------------------------------------------
	--  التقويم الأرمني
	----------------------------------------------------------------------

	if year > 551 then
	local armenian = calendar:new()
	armenian:setLink( 'تقويم أرمني' )
		local armenianYear = year - 551
		armenian:setYear( string.format( '%s<br />ԹՎ %s', armenianYear, numToArmenian( armenianYear ) ) )
	box:addCalendar( armenian )
	end

	----------------------------------------------------------------------
	-- التقويم السرياني
	----------------------------------------------------------------------

	local assyrian = calendar:new()
	assyrian:setLink( 'تقويم سرياني' )
	assyrian:setYear( year + 4750 )
	box:addCalendar( assyrian )

	----------------------------------------------------------------------
	--تقويم بهائي
	-- displays only after 1843
	----------------------------------------------------------------------
	
	if year >= 1844 then
		local bahai = calendar:new()
		bahai:setLink( 'تقويم بهائي' )
		bahai:setYearRange( year - 1844, year - 1843 )
		box:addCalendar( bahai )
	end

	----------------------------------------------------------------------
	-- التقويم البنغالي
	----------------------------------------------------------------------

	local bengali = calendar:new()
	bengali:setLink( 'تقويم بنغالي' )
	bengali:setYear( year - 593 )
	box:addCalendar( bengali )

	----------------------------------------------------------------------
	-- سنة العرش
	----------------------------------------------------------------------

	if year >= 1000 then
		local regnal = calendar:new()
		local regnalName
		if year > 1706 then
			regnalName = 'بريطاني'
		else
			regnalName = 'إنجليزي'
		end
		regnal:setLink( 'Regnal years of English monarchs', ' سنة عرش ' .. regnalName )
		regnal:setYear( getRegnal( year ) )
		box:addCalendar( regnal )
	end

	----------------------------------------------------------------------
	-- التقويم البوذي
	----------------------------------------------------------------------

	local buddhist = calendar:new()
	buddhist:setLink( 'تقويم بوذي' )
	buddhist:setYear( year + 544 )
	box:addCalendar( buddhist )

	----------------------------------------------------------------------
	-- التقويم البورمي
	----------------------------------------------------------------------

	local burmese = calendar:new()
	burmese:setLink( 'تقويم بورمي' )
	burmese:setYear( year - 638 )
	box:addCalendar( burmese )

	----------------------------------------------------------------------
	-- التقويم البيزنطي
	----------------------------------------------------------------------

	local byzantine = calendar:new()
	byzantine:setLink( 'تقويم بيزنطي' )
	byzantine:setYearRange( year + 5508, year + 5509 )
	box:addCalendar( byzantine )

	----------------------------------------------------------------------
	-- التقويم الصيني
	----------------------------------------------------------------------

	local chinese = calendar:new()
	chinese:setLink( 'تقويم صيني' )

	-- Define the information for the "heavenly stems" and "earthly branches" year cycles.
	-- انظر [[تقويم صيني#زمر السنوات]] للمعلومات.

	local heavenlyStems = {
		{ '甲', 'الخشبي' },   -- 1
		{ '乙', 'الخشبي' },   -- 2
		{ '丙', 'الناري' },   -- 3
		{ '丁', 'الناري' },   -- 4
		{ '戊', 'الأرضي' },  -- 5
		{ '己', 'الأرضي' },  -- 6
		{ '庚', 'المعدني' },  -- 7
		{ '辛', 'المعدني' },  -- 8
		{ '壬', 'المائي' },  -- 9
		{ '癸', 'المائي' }   -- 10
	}

	local earthlyBranches = {
		{ '子', '[[برج الفأر|الفأر]]' },           -- 1
		{ '丑', '[[برج الثور الصيني|الثور]]' },             -- 2
		{ '寅', '[[برج النمر|النمر]]' },       -- 3
		{ '卯', '[[برج الأرنب|الأرنب]]' },     -- 4
		{ '辰', '[[برج التنين|التنين]]' },     -- 5
		{ '巳', '[[برج الأفعى|الأفعى]]' },       -- 6
		{ '午', '[[برج الحصان|الحصان]]' },       -- 7
		{ '未', '[[برج العنزة|العنزة]]' },         -- 8
		{ '申', '[[برج القرد|القرد]]' },     -- 9
		{ '酉', '[[برج الديك|الديك]]' },   -- 10
		{ '戌', '[[برج الكلب|الكلب]]' },           -- 11
		{ '亥', '[[برج الخنزير|الخنزير]]' }            -- 12
	}

	-- Calculate the cycle numbers from the year. The first sexagenary year corresponds to the ''previous'' year's entry
	-- in [[Chinese calendar correspondence table]], as the Chinese New Year doesn't happen until Jan/Feb in
	-- Gregorian years.
	local sexagenaryYear1 = ( year - 4 ) % 60
	local sexagenaryYear2 = ( year - 3 ) % 60
	local heavenlyNum1 = (sexagenaryYear1 - 1) % 10 + 1 -- amod, since lua arrays are 1-indexed
	local heavenlyNum2 = (sexagenaryYear2 - 1) % 10 + 1
	local earthlyNum1 = (sexagenaryYear1 - 1) % 12 + 1
	local earthlyNum2 = (sexagenaryYear2 - 1) % 12 + 1

	-- Get the data tables for each permutation.
	local heavenlyTable1 = heavenlyStems[ heavenlyNum1 ]
	local heavenlyTable2 = heavenlyStems[ heavenlyNum2 ]
	local earthlyTable1 = earthlyBranches[ earthlyNum1 ]
	local earthlyTable2 = earthlyBranches[ earthlyNum2 ]

	-- Work out the continously-numbered year. (See [[تقويم صيني]].)
	local year1 = year + 2696
	local year2 = year + 2697
	local year1Alt = year1 - 60
	local year2Alt = year2 - 60

	-- Format any negative numbers.
	year1 = formatNegative( tostring( year1 ) )
	year2 = formatNegative( tostring( year2 ) )
	year1Alt = formatNegative( tostring( year1Alt ) )
	year2Alt = formatNegative( tostring( year2Alt ) )

	-- Return all of that data in a (hopefully) reader-friendly format.
	chinese:setYear( string.format(
			[=[[[Sexagenary cycle|%s%s]]年 <small>(%s&nbsp;%s)</small><br />%s أو %s<br />&nbsp;&nbsp;&nbsp;&nbsp;''—&nbsp;إلى&nbsp;—''<br />%s%s年 <small>(%s&nbsp;%s)</small><br />%s أو %s]=],
			heavenlyTable1[ 1 ],
			earthlyTable1[ 1 ],
			earthlyTable1[ 2 ],
			heavenlyTable1[ 2 ],
			year1,
			year1Alt,
			heavenlyTable2[ 1 ],
			earthlyTable2[ 1 ],
			earthlyTable2[ 2 ],
			heavenlyTable2[ 2 ],
			year2,
			year2Alt
			) )

	box:addCalendar( chinese )

	----------------------------------------------------------------------
	-- التقويم القبطي
	----------------------------------------------------------------------

	local coptic = calendar:new()
	coptic:setLink( 'تقويم قبطي' )
	coptic:setYearRange( year - 284, year - 283 )
	box:addCalendar( coptic )

	----------------------------------------------------------------------
	-- التقويم الديسكوردي
	----------------------------------------------------------------------

	local discordian = calendar:new()
	discordian:setLink( 'تقويم ديسكوردي' )
	discordian:setYear( year + 1166 )
	box:addCalendar( discordian )

	----------------------------------------------------------------------
	-- التقويم الإثيوبي
	----------------------------------------------------------------------

	local ethiopian = calendar:new()
	ethiopian:setLink( 'تقويم إثيوبي' )
	ethiopian:setYearRange( year - 8, year - 7 )
	box:addCalendar( ethiopian )

	----------------------------------------------------------------------
	-- التقويم العبري
	----------------------------------------------------------------------

	local hebrew = calendar:new()
	hebrew:setLink( 'تقويم عبري' )
	hebrew:setYearRange( year + 3760, year + 3761 )
	box:addCalendar( hebrew )

	----------------------------------------------------------------------
	-- التقويمات الهندية
	----------------------------------------------------------------------

	local hindu = calendarGroup:new{ heading = '[[تقويم هندي|تقويمات هندية]]' }

	-- بيكرم سامفات

	local vikramSamvat = calendar:new()
	vikramSamvat:setLink( 'بيكرم سامفات' )
	vikramSamvat:setYearRange( year + 56, year + 57 )
	hindu:addCalendar( vikramSamvat )

	-- شاكا سامفات

	local shakaSamvat = calendar:new()
	shakaSamvat:setLink( 'تقويم هندي وطني', 'شاكا سامفات' )
	if year - 76 > 0 then
		shakaSamvat:setYearRange( year - 78, year - 77 )
	end
	hindu:addCalendar( shakaSamvat )

	-- كالي يوغا

	local kaliYuga = calendar:new()
	kaliYuga:setLink( 'كالي يوغا' ) -- use italics
	kaliYuga:setYearRange( year + 3101, year + 3102 )
	hindu:addCalendar( kaliYuga )

	box:addCalendarGroup( hindu )

	----------------------------------------------------------------------
	-- التقويم الهولوسين
	----------------------------------------------------------------------

	local holocene = calendar:new()
	holocene:setLink( 'تقويم هولوسين' )
	holocene:setYear( year + 10000 )
	box:addCalendar( holocene )

	----------------------------------------------------------------------
	-- التقويم الإغبو
	----------------------------------------------------------------------

	-- In the old template this was a calendar group with just one calendar; intentionally adding this as a single
	-- calendar here, as the previous behaviour looked like a mistake.
	if year >= 1000 then
		local igbo = calendar:new()
		igbo:setLink( 'تقويم إغبو' )
		igbo:setYearRange( year - 1000, year - 999 )
		box:addCalendar( igbo )
	end

	----------------------------------------------------------------------
	-- التقويم الإيراني
	----------------------------------------------------------------------

	local iranian = calendar:new()
	iranian:setLink( 'تقويمات إيرانية', 'تقويم إيراني' )
	if year - 621 > 0 then
		iranian:setYearRange( year - 622, year - 621 )
	else
		iranian:setYear( string.format( '%d BP&nbsp;– %d BP', 622 - year, 621 - year ) )
	end
	box:addCalendar( iranian )

	----------------------------------------------------------------------
	-- التقويم الياباني
	-- starting 600
	----------------------------------------------------------------------
	
	if year >= 600 then
	local japanese = calendar:new()
	japanese:setLink( 'تقويم ياباني' )

	japanese.thisEra = japaneseEra:new{ year = year }
	if japanese.thisEra then
		local japaneseYearText = {}
		japanese.oldEra = japanese.thisEra:getOldEra()
		if japanese.oldEra and japanese.oldEra.eraYear and japanese.thisEra.article ~= japanese.oldEra.article then
			japanese.oldText = string.format( '%s %d', japanese.oldEra.link, japanese.oldEra.eraYear )
			table.insert( japaneseYearText, japanese.oldText )
			table.insert( japaneseYearText, ' / ' )
		end
		if japanese.thisEra.eraYear then
			table.insert( japaneseYearText, string.format( '%s %d', japanese.thisEra.link, japanese.thisEra.eraYear ) )
		end
		table.insert( japaneseYearText, string.format( '<br /><small>(%s%s年)</small>', japanese.thisEra.kanji, japanese.thisEra.eraYearKanji ) )
		japanese:setYear( table.concat( japaneseYearText ) )
	end

	box:addCalendar( japanese )
	end

	----------------------------------------------------------------------
	-- التقويم الجوتشي
	-- displays only after 1910
	----------------------------------------------------------------------

	if year >= 1910 then
		local juche = calendar:new()
		juche:setLink( 'تقويم كوريا الشمالية', 'تقويم جوتشي' )
		if year > 1911 then
			juche:setYear( year - 1911 )
		end
		box:addCalendar( juche )
	end

	----------------------------------------------------------------------
	-- التقويم اليولياني
	----------------------------------------------------------------------

	local julian = calendar:new()
	julian:setLink( 'تقويم يولياني' )

	if year >= -45 and year < 1582 then
		julian:setYear(gregorian.year)
	elseif year >= 1582 then
		local diff = math.floor(year/100-2) - math.floor(year/400)
		if year % 100 == 0 and year % 400 ~= 0 then
			julian:setYear('متأخر ' .. diff-1 .. ' or ' .. diff .. '  يوما عن التقويم الميلادي ')
		else
			julian:setYear('متأخر ' .. diff .. ' يوما عن التقويم الميلادي')
		end
	end

	box:addCalendar( julian )

	----------------------------------------------------------------------
	-- التقويم الكوري
	----------------------------------------------------------------------

	local korean = calendar:new()
	korean:setLink( 'تقويم كوري' )
	korean:setYear( year + 2333 )
	box:addCalendar( korean )

	----------------------------------------------------------------------
	-- التقويم المينغوو
	----------------------------------------------------------------------

	local minguo = calendar:new()
	minguo:setLink( 'تقويم مينغوو' )
	if year > 1911 then
		local minguoYear = year - 1911
		minguo:setYear( string.format( '%d على إعلان [[تايوان|جمهورية الصين]]<br /><small>民國%d年</small>', minguoYear, minguoYear ) )
	else
		local minguoYear = 1911 - year + 1
		minguo:setYear( string.format( '%d قبل إعلان [[تايوان|جمهورية الصين]]<br /><small>民前%d年</small>', minguoYear, minguoYear ) )
	end
	box:addCalendar( minguo )
	
	----------------------------------------------------------------------
	-- الحقبة السلوقيية
	-- تبدأ من  312 قبل الميلاد حتى 1200 بعد الميلاد
	----------------------------------------------------------------------
	
	if year >= -311 and year < 1200 then
		local seleucid = calendar:new()
			seleucid:setLink( 'تقويم سلوقي' )
			addtext = string.format( '[[Anno Graecorum|AG]]')
		seleucid:setYearCouple( year + 311, year + 312, addtext )
		box:addCalendar( seleucid )
	end
	
	----------------------------------------------------------------------
	-- التقويم التايلندي الشمسي 
	----------------------------------------------------------------------

	local thai = calendar:new()
	thai:setLink( 'تقويم تايلندي' )
	if year >= 1941 then
		thai:setYear( year + 543 )
	else -- if year >= 1912 or year <= 1887 -- year started in March/April
		thai:setYearRange( year + 542, year + 543 )
	-- else -- Rattanakosin Era, 1888?-1912
	--			thai:setYear( string.format( '%d &nbsp;– %d <small>([[Rattanakosin Kingdom|Rattanakosin Era]])</small>', year - 1782 , year - 1781 ) )
	end
	box:addCalendar( thai )

	----------------------------------------------------------------------
	-- توقيت يونكس
	----------------------------------------------------------------------

	local unix = calendar:new()

	local function getUnixTime( year )
		if year < 1970 then return end
		local noError, unixTime = pcall( lang.formatDate, lang, 'U', '1 Jan ' .. tostring( year ) )
		if not noError or noError and not unixTime then return end
		unixTime = tonumber( unixTime )
		if unixTime and unixTime >= 0 then
			return unixTime
		end
	end

	unix.thisYear = getUnixTime( year )
	unix.nextYear = getUnixTime( year + 1 )
	if unix.thisYear and unix.nextYear then
		unix:setLink( 'توقيت يونكس' )
		unix:setYearRange( unix.thisYear, unix.nextYear - 1 )
	end

	box:addCalendar( unix )

	return box:export()
end

--------------------------------------------------------------------
-- Process arguments from #invoke
--------------------------------------------------------------------

local p = {}

function p.main( frame )
	-- Process the arguments and pass them to the box-building function.
	local args = getArgs( frame )
	-- Pass year argument with 'year' parameter or without any name but first argument
	args.year = args.year or args[1]
	return makeCalendarBox( args )
end

return p
مجلوبة من «https://arabica.cc/index.php?title=وحدة:Year_in_other_calendars&oldid=247»