Module:Formatnum

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--
-- Module for Interslavic number formatting
-- This module can be replaced by {{formatnum:}} declaration when Interslavic MediaWiki localisation will be created.
-- Source: https://sites.google.com/site/neoslavonictutorial/lessons/9
--
local p = {}

-- For usage in other modules
function p._formatnum(num)
	if num == nil or num == '' then
		return num
	end
	
	local withoutMarkers, commaCount = mw.text.unstrip(num):gsub(',', '.')
	local formatted = tonumber(withoutMarkers)
	if formatted == nil or commaCount > 1 then
		local errorCategory = mw.message.new('nonnumeric-formatnum'):plain()
		return num .. '[[Category:' .. errorCategory .. ']]'
	end
	
	local lang = mw.getContentLanguage()
	formatted = mw.ustring.gsub(lang:formatNum(formatted), '%,', ' '):gsub('%.', ',')
	formatted = mw.ustring.gsub(num, withoutMarkers, formatted)
	
	return formatted
end

-- For usage in templates
function p.formatnum(frame)
	local args = frame.args
	local num = args[1]
	if num == nil or num == '' then
		return
	end
	
	return p._formatnum(num)
end

return p