-- This module takes positional parameters as input and concatenates them with

-- an optional separator. The final separator (the "conjunction") can be

-- specified independently, enabling natural-language lists like

-- "foo, bar, baz and qux". The starting parameter can also be specified.



local compressSparseArray = require('Module:TableTools').compressSparseArray

local p = {}



function p._main(args)

	local separator = args.separator

		-- Decode (convert to Unicode) HTML escape sequences, such as " " for space.

		and mw.text.decode(args.separator) or ''

	local conjunction = args.conjunction and mw.text.decode(args.conjunction) or separator

	-- Discard values before the starting parameter.

	local start = tonumber(args.start)

	if start then

		for i = 1, start - 1 do argsi = nil end

	end

	-- Discard named parameters.

	local values = compressSparseArray(args)

	return mw.text.listToText(values, separator, conjunction)

end



local function makeInvokeFunction(separator, conjunction, first)

	return function (frame)

		local args = require('Module:Arguments').getArgs(frame)

		args.separator = separator or args.separator

		args.conjunction = conjunction or args.conjunction

		args.first = first or args.first

		return p._main(args)

	end

end



p.main = makeInvokeFunction()

p.br = makeInvokeFunction('<br />')

p.comma = makeInvokeFunction(mw.message.new('comma-separator'):plain())



return p