Module:Check for unknown parameters

From annadreambrush.com/wiki
Revision as of 15:36, 30 March 2015 by imported>Frietjes (add html comments to make it easier to see the output without disrupting the article)
Jump to navigation Jump to search

Documentation for this module may be created at Module:Check for unknown parameters/doc

-- This module may be used to compare the arguments passed to the parent
-- with a list of arguments, returning a specified result if an argument is
-- not on the list
local p = {}

local function isnotempty(s)
	return s and s:match( '^%s*(.-)%s*$' ) ~= ''
end

function p.check (frame)
	local args = frame.args
	local pargs = frame:getParent().args
	local ignoreblank = isnotempty(frame.args['ignoreblank'])
	local checkpos = isnotempty(frame.args['checkpositional'])
	local knownargs = {}
	local unknown = 'Found _VALUE_, '

	local res = {}
	local comments = {}
	local commentstr = ''
	
	-- create the list of known args, and the return string
	for k, v in pairs(args) do
		if type(k) == 'number' then
			v = mw.ustring.gsub(v, '^%s*(.-)%s*$', '%1')
			knownargs[v] = 1
		else
			if (k == 'unknown' and type(v) == 'string') then
				unknown = v
			end
		end
	end

	-- loop over the parent args, and make sure they are on the list
	for k,v in pairs(pargs) do
		if (type(k) == 'string' and knownargs[k] == nil) then
			if( (not ignoreblank) or (ignoreblank and isnotempty(v)) ) then
				k = mw.ustring.gsub(k, '[^%w\-_ ]', '?')
				local r = mw.ustring.gsub(unknown, '_VALUE_', k)
				table.insert(res, r)
				table.insert(comments, '"' .. k .. '"')
			end
		elseif(checkpos and type(k) == 'number' and knownargs[tostring(k)] == nil) then
			if( (not ignoreblank) or (ignoreblank and isnotempty(v)) ) then
				local r = mw.ustring.gsub(unknown, '_VALUE_', k)
				table.insert(res, r)
				table.insert(comments, '"' .. k .. '"')
			end
		end
	end

	if(#comments > 0) then
		commentstr = '<!-- Module:Check for unknown parameters results: ' ..
			table.concat(comments, ', ') .. '-->'
	end
	
	return table.concat(res) .. commentstr
end

return p