Module:Check for unknown parameters

2016-04-29T02:05:33Z

2001:E68:5DB6:4400:1CC9:6BF6:F04B:8803: Created page with "-- 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..."

-- 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 trim(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 = frame.args['unknown'] or 'Found _VALUE_, '
local preview = frame.args['preview']

local res = {}
local regexps = {}
local comments = {}
local commentstr = ''

local ispreview = frame:preprocess( "{{REVISIONID}}" ) == "" and 1 or 0

-- create the list of known args, regular expressions, and the return string
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
if isnotempty(preview) then
preview = '<div class="hatnote" style="color:red"><strong>Warning:</strong> ' .. preview .. ' (this message is shown only in preview).</div>'
elseif preview == nil then
preview = unknown
end
if ispreview == 1 then
unknown = preview
ignoreblank = false
end

-- adds one result to the output tables
local function addresult(k)
if k == '' then
-- Fix odd bug for | = which gets stripped to the empty string and
-- breaks category links
k = ' '
end
local r = unknown:gsub('_VALUE_', k)
table.insert(res, r)
table.insert(comments, '"' .. k .. '"')
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
local knownflag = false
for i, 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
k = mw.ustring.gsub(k, '[^%w\-_ ]', '?')
addresult(k)
end
elseif checkpos and
type(k) == 'number' and
knownargs[tostring(k)] == nil and
( not ignoreblank or isnotempty(v) )
then
addresult(k)
end
end

if #comments > 0 then
commentstr = ''
end

return table.concat(res) .. commentstr
end

return p

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Module:Check for unknown parameters