Module:Check for unknown parameters
This Lua module is used in MediaWiki:Abusefilter-warning-DS, and on approximately 21,000,000 pages, or roughly 175865% 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: |
This module may be appended to a template to check for uses of unknown parameters.
Usage
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.
Example
{{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
- Category:Unknown parameters (0) (category page can have header {{Unknown parameters category}})
- Module:Check for deprecated parameters – similar module that checks for deprecated parameters
- Module:Check for clobbered parameters – module that checks for conflicting parameters
- Module:TemplatePar – similar function (originally from dewiki)
- Template:Parameters and Module:Parameters – generates a list of parameter names for a given template
- Project:TemplateData based template parameter validation
- Module:Parameter validation checks a lot more
- User:Bamyers99/TemplateParametersTool - A tool for checking usage of template parameters
-- 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*$')
end
local function isnotempty(s)
return s and trim(s) ~= ''
end
function p.check (frame)
local args = frame.args
local pargs = frame:getParent().args
local ignoreblank = isnotempty(frame.args['ignoreblank'])
local showblankpos = isnotempty(frame.args['showblankpositional'])
local knownargs = {}
local unknown = frame.args['unknown'] or 'Found _VALUE_, '
local preview = frame.args['preview']
local values = {}
local res = {}
local regexps = {}
-- create the list of known args, regular expressions, and the return string
for k, v in pairs(args) do
if type(k) == 'number' then
v = trim(v)
knownargs[v] = 1
elseif k:find('^regexp[1-9][0-9]*$') 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
-- 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.text.encode(mw.text.encode(k),'%c%[%]=%%')
table.insert(values, k)
end
elseif type(k) == 'number' and
knownargs[tostring(k)] == nil and
( showblankpos or isnotempty(v) )
then
local vlen = mw.ustring.len(v)
v = mw.ustring.sub(v, 1, (vlen < 25) and vlen or 25)
v = mw.text.encode(mw.text.encode(v),'%c%[%]=%%')
table.insert(values, k .. ' = ' .. v .. ((vlen >= 25) and ' ...' or ''))
end
end
-- add resuls to the output tables
if #values > 0 then
if frame:preprocess( "{{REVISIONID}}" ) == "" then
unknown = preview
end
for k, v in pairs(values) do
if v == '' then
-- Fix odd bug for | = which gets stripped to the empty string and
-- breaks category links
v = ' '
end
local r = unknown:gsub('_VALUE_')
table.insert(res, r)
end
end
return table.concat(res)
end
return p