Module:Check for unknown parameters
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This Lua module is used in MediaWiki:Abusefilter-warning-DS​, and on approximately 11,600,000 pages, or roughly 22% of all pages.
Changes to it can cause immediate changes to the Wikipedia user interface.
To avoid major disruption and server load, any changes should be tested in the module's /sandbox or /testcases subpages, or in your own module sandbox. The tested changes can be added to this page in a single edit. Please discuss changes on the talk page before implementing them.
This module is subject to page protection. It is a highly visible module in use by a very large number of pages, or is substituted very frequently. Because vandalism or mistakes would affect many pages, and even trivial editing might cause substantial load on the servers, it is protected from editing.
This module depends on the following other modules:
Module:If preview (sandbox)
This module may be appended to a template to check for uses of unknown parameters.
Basic usage
{{#invoke:check for unknown parameters|check |unknown=[[Category:Some tracking category]] |arg1|arg2|arg3|argN}}
or to sort the entries in the tracking category by parameter with a preview error message
{{#invoke:check for unknown parameters|check |unknown=[[Category:Some tracking category|_VALUE_]] |preview=unknown parameter "_VALUE_" |arg1|arg2|...|argN}}
or for an explicit red error message
{{#invoke:check for unknown parameters|check |unknown=<span class="error">Sorry, I don't recognize _VALUE_</span> |arg1|arg2|...|argN}}
Here, arg1, arg2, ..., argN, are the known parameters. Unnamed (positional) parameters can be added too: |1|2|argname1|argname2|...​. Any parameter which is used, but not on this list, will cause the module to return whatever is passed with the unknown parameter. The _VALUE_ keyword, if used, will be changed to the name of the parameter. This is useful for either sorting the entries in a tracking category, or for provide more explicit information.
By default, the module makes no distinction between a defined-but-blank parameter and a non-blank parameter. That is, both unlisted |foo=x and |foo= are reported. To only track non-blank parameters use |ignoreblank=1.
By default, the module ignores blank positional parameters. That is, an unlisted |2= is ignored. To include blank positional parameters in the tracking use |showblankpositional=1​.
Lua patterns
This module supports Lua patterns (similar to regular expressions), which are useful when there are many known parameters which use a systematic pattern. For example, template:infobox3cols uses
| regexp1 = header[%d][%d]* | regexp2 = label[%d][%d]* | regexp3 = data[%d][%d]*[abc]? | regexp4 = class[%d][%d]*[abc]? | regexp5 = rowclass[%d][%d]* | regexp6 = rowstyle[%d][%d]* | regexp7 = rowcellstyle[%d][%d]*
to match all parameters of the form headerNUM, labelNUM, dataNUM, dataNUMa, dataNUMb, dataNUMc, ..., rowcellstyleNUM, where NUM is a string of digits.
{{Infobox | above = {{{name|}}} | label1 = Height | data1 = {{{height|}}} | label2 = Weight | data2 = {{{weight|}}} | label3 = Website | data3 = {{{website|}}} }}<!-- end infobox, start tracking -->{{#invoke:Check for unknown parameters|check | unknown = {{main other|[[Category:Some tracking category|_VALUE_]]}} | preview = unknown parameter "_VALUE_" | name | height | weight | website }}
See also
The above documentation is transcluded from Module:Check for unknown parameters/doc. (edit | history)
Editors can experiment in this module's sandbox (edit | diff) and testcases (edit | run) pages.
Subpages of this module.
-- 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 listlocal p = {}
local function trim(s) return s​:​match​(​'^%s*(.-)%s*$'​)​end​
local function isnotempty(s) return s and s:match('%S')end
local function clean(text) -- Return text cleaned for display and truncated if too long. -- Strip markers are replaced with dummy text representing the original wikitext. local pos, truncated local function truncate(text) if truncated then return '' end if mw.ustring.len(text) > 25 then truncated = true text = mw.ustring.sub(text, 1, 25) .. '...' end return mw.text.nowiki(text) end local parts = {} for before, tag, remainder in text​:​gmatch​(​'([^​\127​]*)​\127​[^​\127​]*%-(%l+)%-[^​\127​]*​\127​()'​) do pos = remainder table.insert(parts, truncate(before) .. '&lt;' .. tag .. '&gt;...&lt;/' .. tag .. '&gt;') end table.insert(parts, truncate(text:sub(pos or 1))) return table.concat​(​parts​)​end​
function p._check(args, pargs) if type(args) ~= "table" or type(pargs) ~= "table" then -- TODO: error handling return end
-- create the list of known args, regular expressions, and the return string local knownargs = {} local regexps = {} for k, v in pairs(args) do if type(k) == 'number' then v = trim(v) knownargs[v] = 1 elseif k​:​find​(​'^regexp[1-9][0-9]*$'​) 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 and ( showblankpos or isnotempty(v) ) then table.insert(values, k .. ' = ' .. clean(v)) end end
-- add results to the output tables local res = {} if #values > 0 then local unknown_text = args['unknown'] or 'Found _VALUE_, '
if mw​.​getCurrentFrame​():​preprocess​( "{{REVISIONID}}" ) == "" then local preview_text = args['preview'] if isnotempty​(​preview_text​) then preview_text = require('Module:If preview'​).​_warning​({​preview_text​}) elseif preview == nil then preview_text = unknown_text end unknown_text = preview_text end 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 r = unknown_text​:​gsub​(​'_VALUE_'​, {_VALUE_ = v}) table.insert(res, r) end end
return table.concat​(​res​)​end​
function p.check(frame) local args = frame.args local pargs = frame​:​getParent​().​args return p._check(args, pargs)end
return p
Last edited on 12 July 2021, at 02:18
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