Module:Check for unknown parameters/sandbox

-- 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 trim(s) return s:match('^%s*(.-)%s*$') end

local function isnotempty(s) return s and s:match('%S') end

local function clean(text) -- Return text cleaned for display and truncated if too long. -- Strip markers are replaced with dummy text representing the original wikitext. local truncated local function truncate(text) if truncated then return '' end if mw.ustring.len(text) > 25 then truncated = true text = mw.ustring.sub(text, 1, 25) .. '...'		end return mw.text.nowiki(text) end local parts = {} local pos for before, tag, remainder in text:gmatch('([^\127]*)\127[^\127]*%-(%l+)%-[^\127]*\127') do		pos = remainder table.insert(parts, truncate(before) .. '&lt;' .. tag .. '&gt;...&lt;/' .. tag .. '&gt;') end table.insert(parts, truncate(text:sub(pos or 1))) return table.concat(parts) end

local function get_values(args, pargs) -- create the list of known args, regular expressions, and the return string local knownargs = {} local regexps = {} for k, v in pairs(args) do		if type(k) == 'number' then v = trim(v) knownargs[v] = 1 elseif k:find('^regexp[1-9][0-9]*$') then table.insert(regexps, '^' .. v .. '$') end end -- loop over the parent args, and make sure they are on the list local ignoreblank = isnotempty(args['ignoreblank']) local showblankpos = isnotempty(args['showblankpositional']) local values = {} for k, v in pairs(pargs) do		if type(k) == 'string' and knownargs[k] == nil then local knownflag = false for _, regexp in ipairs(regexps) do				if mw.ustring.match(k, regexp) then knownflag = true break end end if not knownflag and ( not ignoreblank or isnotempty(v) ) then table.insert(values, clean(k)) end elseif type(k) == 'number' and knownargs[tostring(k)] == nil then local knownflag = false for _, regexp in ipairs(regexps) do				if mw.ustring.match(tostring(k), regexp) then knownflag = true break end end if not knownflag and ( showblankpos or isnotempty(v) ) then table.insert(values, k .. ' = ' .. clean(v)) end end end return values end

function p._check(args, pargs) if type(args) ~= "table" or type(pargs) ~= "table" then -- TODO: error handling return end

local values = get_values(args, pargs)

-- add results to the output tables local previews = {} local categories = {} local unknown_category = args['unknown'] local preview_text = args['preview'] or 'Found _VALUE_, ' if #values > 0 then preview_text = require('Module:If preview')._warning({preview_text})

for _, v in pairs(values) do			-- Fix odd bug for | = which gets stripped to the empty string and -- breaks category links if v == '' then v = ' ' end

-- avoid error with v = 'example%2' ("invalid capture index") local category = unknown_category:gsub('_VALUE_', {_VALUE_ = v}) local preview = preview_text:gsub('_VALUE_', {_VALUE_ = v}) table.insert(categories, category) table.insert(previews, preview) end end

return table.concat(previews) .. "\n" .. table.concat(categories) end

function p.check(frame) local args = frame.args local pargs = frame:getParent.args return p._check(args, pargs) end

return p