local lang = mw.getLanguage('en') local lang_bn = mw.language.getContentLanguage() local convert = require('মডিউল:সংখ্যা রূপান্তরকারী').convert local Math = require('Module:Math') local SortKey = require('Module:Sortkey') -- constants local INF = math.huge local NEGINF = -math.huge local MINUS = '−'  -- Unicode U+2212 MINUS SIGN (UTF-8: e2 88 92)  -- Nts class  local Nts = {} Nts.__index = Nts  Nts.formats = { 	no = true, 	yes = true, }  function Nts.new(args) 	local self = setmetatable({}, Nts)  	self:parseNumber(args[1])  	-- Set the format string 	self.format = args.format or 'yes' 	if not Nts.formats[self.format] then 		error(string.format( 			"'%s' বৈধ বিন্যাস নয়", 			tostring(self.format) 		), 0) 	end 	 	-- To display some text before the display version of the number 	--  → approx. 123,456,789.00123 	self.prefix = args.prefix or 	 	-- debug info 	self.debug = args.debug or 'no' 	self.quiet = args.quiet or 'no'  	return self end  -- Parse the entered number function Nts:parseNumber(s) 	-- sanitize 	s = convert('en',s) or ; 	s = string.gsub(s,'−','-') 	s = string.gsub(s, MINUS, '-') 	self.rawNumberString = s 	 	-- fractions. was somewhat but completely broken at some point 	self.isFraction = (string.find(s, '/') ~= nil) 	if self.isFraction then 		error(string.format( 				"ভগ্নাংশ সমর্থিত নয়", 				tostring(s) 			), 0) 	end 	 	-- format detection 	self.isScientificNotation = (string.find(s, 'e') ~= nil) 	 	-- parse with language options 	self.number = lang:parseFormattedNumber(s) 	 	-- parse with fallback 	if not self.number then 		self.number = tonumber(s) 	end 	 	-- allow for empty string as a value 	if not self.number then 		-- error(string.format( 		-- 		"'%s' is not a valid number", 		-- 		tostring(s) 		-- 	), 0) 		self.number = NEGINF 	end 	 	if self.number < 0 then 		self.sign = MINUS 	else 		self.sign = 	end  	self.absNumber = math.abs(self.number) 	if self.absNumber ~= INF then 		self.magnitude = math.floor(math.log10(self.absNumber)) 		self.significand = self.number / 10^self.magnitude 		self.precision = Math._precision(self.rawNumberString) 		self.integer = math.floor(self.absNumber) 		self.fractional = math.abs(self.number - self.integer) 	end end  function Nts:makeDisplay() 	local ret ={}  	if self.quiet == 'yes' then 		return  	end  	ret[#ret + 1] = self.prefix 	local sciNotation = string.find(tostring(self.number),'e') 	if self.absNnumber == INF or isNaN(self.number) or self.magnitude ==nil or math.abs(self.magnitude) == INF then 		ret[#ret + 1] = convert('bn', string.gsub(self.rawNumberString, '-', MINUS)) 	elseif sciNotation ~= nil or math.abs(self.magnitude) >= 9 then 		ret[#ret + 1] = self.sign 		if self.format == 'yes' then 			ret[#ret + 1] = lang_bn:formatNum(math.abs(self.number * 10^-self.magnitude)) 		else 			ret[#ret + 1] = convert('bn', math.abs(self.number * 10^-self.magnitude)) 		end 		ret[#ret + 1] = '×১০^' 		if self.magnitude<0 then 			ret[#ret + 1] = MINUS .. convert('bn', tostring((-self.magnitude))) 		else 			ret[#ret + 1] = convert('bn', tostring(self.magnitude)) 		end 		ret[#ret + 1] = '' 	else 		ret[#ret + 1] = self.sign 		if self.format == 'yes' then 			ret[#ret + 1] = Math._precision_format(self.absNumber, self.precision) 		else 			local newPrecision = Math._precision(self.absNumber) 			ret[#ret + 1] = tostring(self.absNumber) 			if newPrecision < self.precision then 				if self.integer == self.absNumber then 					ret[#ret + 1] = '.' 				end 				ret[#ret + 1] = string.rep('0', math.min(12, self.precision - newPrecision) ) 			end 		end 	end     return table.concat(ret)  end  function Nts:makeSortKey() 	return SortKey._sortKeyForNumber(self.number) .. '♠' end  function ifNaNThen(n,p) 	if isNaN(n) then 		return p 	end 	return n end  function isNaN(n) 	return n ~= n end  function Nts:renderTrackingCategories() 	if self.hasDeprecatedParameters then 		return 	else 		return  	end end  function Nts:__tostring() 	local root = mw.html.create() 	local span = root:tag('span') 		:attr('data-sort-value', self:makeSortKey())  	if self.debug == 'yes' then 		span:tag('span') 			:css('border', '1px solid') 			:wikitext(self:makeSortKey()) 	elseif self.quiet ~= 'no' then 		span:css('display', 'none') 	end  	-- Display 	if self.quiet == 'no' then 		span:wikitext(self:makeDisplay()) 	end  	-- Tracking categories 	root:wikitext(self:renderTrackingCategories())  	return tostring(root) end  -- Exports  local p = {}  function p._exportClasses() 	return { 		Nts = Nts 	} end  function p._main(args) 	local success, ret = pcall(function () 		local nts = Nts.new(args) 		return tostring(nts) 	end) 	if success then 		return ret 	else 		ret = string.format( 			'টেমপ্লেট:সংখ্যার ছক বাছাই-এ ত্রুটি: %s', 			ret 		) 		if mw.title.getCurrentTitle().namespace == 0 then 			-- Only categorise in the main namespace 			ret = ret .. 'বিষয়শ্রেণী:ত্রুটিসহ সংখ্যার ছক বাছাই টেমপ্লেট' 		end 		return ret 	end end  function p.main(frame) 	local args = require('Module:Arguments').getArgs(frame, { 		wrappers = { 'টেমপ্লেট:সংখ্যার ছক বাছাই' }, 	}) 	return p._main(args) end  return p