Module:UnitPlural

-- Module to create plurals for units (initially) Might be split into code and data --

-- Plurals by language -- local plural = { -- English en = { -- standard suffix, and "per": "s", ["per"] = "per", -- irregular plurals: ["inch"] = "inches", ["foot"] = "feet", ["square foot"] = "square feet", ["cubic foot"] = "cubic feet", ["pound-force"] = "pounds-force", ["kilogram-force"] = "kilograms-force", ["horsepower"] = "horsepower", ["gauss"] = "gauss", ["solar mass"] = "solar masses", ["hertz"] = "hertz", ["degree Fahrenheit"] = "degrees Fahrenheit", ["degree Celsius"] = "degrees Celsius", ["standard gravity"] = "standard gravities", }, }

-- findLang takes a "langcode" parameter if if supplied and valid. Otherwise it tries to create it from the user's set language Failing that, it uses the wiki's content language. It returns a language object. -- local function findLang(langcode) local langobj langcode = mw.text.trim(langcode or "") if mw.language.isKnownLanguageTag(langcode) then langobj = mw.language.new(langcode) else langcode = mw.getCurrentFrame:callParserFunction('int', {'lang'}) if mw.language.isKnownLanguageTag(langcode) then langobj = mw.language.new(langcode) else langobj = mw.language.getContentLanguage end end return langobj end

local p = {}

-- p.pl takes a unit name and an optional language code It returns the plural of that unit in the given language, if it can. it is exported for use in other modules. -- function p.pl(unit, langcode) langcode = findLang(langcode).code unit = tostring(unit) or "" local ret = "" if plural[langcode] then if plural[langcode][unit] then -- irregular plural from lookup ret = plural[langcode][unit] else local per = plural[langcode].per local u1, u2 = unit:match("(.+) " .. per .. " (.+)") if u1 then -- recurse to give plural of bit before " per " ret = p.pl(u1) .. " per " .. u2			else -- standard plural ret = unit .. plural[langcode][1] end end else -- unknown language, so return unchanged ret = unit end return ret end

-- p.plural takes a quantity (number and unit name) and an optional language code It returns the quantity with proper plural units in the given language, if it can. it is exported for use in other modules. -- function p.plural(quant, langcode) local num, unit = quant:match("([%d%.,]+)%A+(.*)") if tonumber(num) == 1 then return num .. " " .. unit else return num .. " " .. p.pl(unit, langcode) end end

-- p.main takes a number and unit name (quantity=) and an optional language code (lang=) from the frame It returns the quantity with proper plural units in the given language, if it can. Example use: returns "3 weeks" -- function p.main(frame) local args = {} if frame.args.quantity then args = frame.args else args = frame:getParent.args end

-- if nothing supplied, return nothing (or add an error message if debugging) if not args.quantity then return "" end

return p.plural(args.quantity, args.lang) end

return p