Module:Link

Documentation for this module may be created at Module:Link/doc

local str = {}

function str.producer( frame )
	local new_args = str._getParameters( frame.args, { 'source' } )
	local content = new_args['source'] or ''
	if content == '' then
		return content
	end

	for _i, subject in ipairs({ 'Billy Corgan', 'Butch Vig' }) do
		mw.ustring.gsub( content, subject, '[[:Category:Songs produced by ' .. subject .. '|' .. subject .. ']]' )
	end

	return content
end

--[[
Helper function that populates the argument list given that user may need to use a mix of
named and unnamed parameters.  This is relevant because named parameters are not
identical to unnamed parameters due to string trimming, and when dealing with strings
we sometimes want to either preserve or remove that whitespace depending on the application.
]]
function str._getParameters( frame_args, arg_list )
	local new_args = {}
	local index = 1
	local value

	for _, arg in ipairs( arg_list ) do
		value = frame_args[arg]
		if value == nil then
			value = frame_args[index]
			index = index + 1
		end
		new_args[arg] = value
	end

	return new_args
end

return str