Module:Parameter validation
![]() | This Lua module is used on approximately 141,000 pages. 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. Consider discussing changes on the talk page before implementing them. |
![]() | This module depends on the following other modules: |
This module helps you find problematic usages of a template's parameters. Compared to Module:Check for unknown parameters, you do not need to create long lists of parameters which should be categorised; it will automatically read them from the template's TemplateData. This means you don't need to define the parameter configuration in multiple places, which will inevitably lead to it being out of sync.
As well as that, it supports a few other types of errors, such as defining the same parameter multiple times, or using deprecated parameters (useful to do so you can replace usages before removing support for a parameter entirely).
Basic usage
Add this to the bottom of a template:
{{#invoke:Parameter validation|validateparams|module_options = Module:Parameter validation/default config}}
This will use the default config defined in Module:Parameter validation/default config. The module will begin to populate the following categories:
- Category:Pages using TEMPLATE_NAME with unknown parameters
- Category:Pages using TEMPLATE_NAME with deprecated parameters
- Category:Pages using TEMPLATE_NAME with duplicate parameters
For example, for {{Infobox station}}, it will populate:
- Category:Pages using infobox station with unknown parameters
- Category:Pages using infobox station with deprecated parameters
- Category:Pages using infobox station with duplicate parameters
Note that:
- Unknown parameters means a page calling the template used a parameter that does not exist in the template documentation's TemplateData section
- Deprecated parameters means a page calling the template used a parameter which, in the template's TemplateData, has the 'deprecated' option ticked
- Duplicate parameters means a page calling the template and set a value for a parameter and one or more of its aliases
Use in protected templates
Note that because templates' TemplateData code typically lives in unprotected /doc pages, protected templates that invoke this module can be made to incorrectly categorize pages by editors who do not have user rights sufficient to edit the template page itself.
Full documentation
This module is based on idea and original code of User:IKhitron.
The source of this module, along with the original documentation, can be found at he:Module:ParamValidator.
local util = {
empty = function( s )
return s == nil or type( s ) == 'string' and mw.text.trim( s ) == ''
end
,
extract_options = function ( frame, optionsPrefix )
optionsPrefix = optionsPrefix or 'options'
local options, n, more = {}
if frame.args['module_options'] then
local module_options = mw.loadData( frame.args['module_options'] )
if type( module_options ) ~= 'table' then return {} end
local title = mw.title.getCurrentTitle()
local local_ptions = module_options[ title.namespace ] or module_options[ title.nsText ] or {}
for k, v in pairs( local_ptions ) do options[k] = v end
end
repeat
ok, more = pcall( mw.text.jsonDecode, frame.args[optionsPrefix .. ( n or '' )] )
if ok and type( more ) == 'table' then
for k, v in pairs( more ) do options[k] = v end
end
n = ( n or 0 ) + 1
until not ok
return options
end
,
build_namelist = function ( template_name, sp )
local res = { template_name }
if sp then
if type( sp ) == 'string' then sp = { sp } end
for _, p in ipairs( sp ) do table.insert( res, template_name .. '/' .. p ) end
end
return res
end
,
table_empty = function( t ) -- normally, test if next(t) is nil, but for some perverse reason, non-empty tables returned by loadData return nil...
if type( t ) ~= 'table' then return true end
for a, b in pairs( t ) do return false end
return true
end
,
}
local function _readTemplateData( templateName )
local title = mw.title.makeTitle( 0, templateName )
local templateContent = title and title.exists and title:getContent() -- template's raw content
local capture = templateContent and mw.ustring.match( templateContent, '<templatedata%s*>(.*)</templatedata%s*>' ) -- templatedata as text
-- capture = capture and mw.ustring.gsub( capture, '"(%d+)"', tonumber ) -- convert "1": {} to 1: {}. frame.args uses numerical indexes for order-based params.
local trailingComma = capture and mw.ustring.find( capture, ',%s*[%]%}]' ) -- look for ,] or ,} : jsonDecode allows it, but it's verbotten in json
if capture and not trailingComma then return pcall( mw.text.jsonDecode, capture ) end
return false
end
local function readTemplateData( templateName )
if type( templateName ) == 'string' then
templateName = { templateName, templateName .. '/' .. docSubPage }
end
if type( templateName ) == "table" then
for _, name in ipairs( templateName ) do
local td, result = _readTemplateData( name )
if td then return result end
end
end
return nil
end
-- this is the function to be called by other modules. it expects the frame, and then an optional list of subpages, e.g. { "Documentation" }.
-- if second parameter is nil, only tempalte page will be searched for templatedata.
function calculateViolations( frame, subpages )
-- used for parameter type validy test. keyed by TD 'type' string. values are function(val) returning bool.
local type_validators = {
['number'] = function( s ) return mw.language.getContentLanguage():parseFormattedNumber( s ) end
}
function compatible( typ, val )
local func = type_validators[typ]
return type( func ) ~= 'function' or util.empty( val ) or func( val )
end
local t_frame = frame:getParent()
local t_args, template_name = t_frame.args, t_frame:getTitle()
template_name = mw.ustring.gsub( template_name, '/sandbox', '', 1 )
local td_source = util.build_namelist( template_name, subpages )
if frame.args['td_source'] then
table.insert(td_source, frame.args['td_source'])
end
local templatedata = readTemplateData( td_source )
local td_params = templatedata and templatedata.params
local all_aliases, all_series = {}, {}
if not td_params then return { ['no-templatedata'] = { [''] = '' } } end
-- from this point on, we know templatedata is valid.
local res = {} -- before returning to caller, we'll prune empty tables
-- allow for aliases
for x, p in pairs( td_params ) do for y, alias in ipairs( p.aliases or {} ) do
p['primary'] = x
td_params[x] = p
all_aliases[alias] = p
if tonumber(alias) then all_aliases[tonumber(alias)] = p end
end end
-- handle undeclared and deprecated
local already_seen = {}
local series = frame.args['series']
for p_name, value in pairs( t_args ) do
local tp_param, noval, numeric, table_name = td_params[p_name] or all_aliases[p_name], util.empty( value ), tonumber( p_name )
local hasval = not noval
if not tp_param and series then -- 2nd chance. check to see if series
for s_name, p in pairs(td_params) do
if mw.ustring.match( p_name, '^' .. s_name .. '%d+' .. '$') then
-- mw.log('found p_name '.. p_name .. ' s_name:' .. s_name, ' p is:', p) debugging series support
tp_param = p
end -- don't bother breaking. td always correct.
end
end
if not tp_param then -- not in TD: this is called undeclared
-- calculate the relevant table for this undeclared parameter, based on parameter and value types
table_name =
noval and numeric and 'empty-undeclared-numeric' or
noval and not numeric and 'empty-undeclared' or
hasval and numeric and 'undeclared-numeric' or
'undeclared' -- tzvototi nishar.
else -- in td: test for deprecation and mistype. if deprecated, no further tests
table_name = tp_param.deprecated and hasval and 'deprecated'
or tp_param.deprecated and noval and 'empty-deprecated'
or not compatible( tp_param.type, value ) and 'incompatible'
or not series and already_seen[tp_param] and hasval and 'duplicate'
if hasval and table_name ~= 'duplicate' then
already_seen[tp_param] = p_name
end
end
-- report it.
if table_name then
res[table_name] = res[table_name] or {}
if table_name == 'duplicate' then
local primary_param = tp_param['primary']
local primaryData = res[table_name][primary_param]
if not primaryData then
primaryData = {}
table.insert(primaryData, already_seen[tp_param])
end
table.insert(primaryData, p_name)
res[table_name][primary_param] = primaryData
else
res[table_name][p_name] = value
end
end
end
-- check for empty/missing parameters declared "required"
for p_name, param in pairs( td_params ) do
if param.required and util.empty( t_args[p_name] ) then
local is_alias
for _, alias in ipairs( param.aliases or {} ) do is_alias = is_alias or not util.empty( t_args[alias] ) end
if not is_alias then
res['empty-required'] = res['empty-required'] or {}
res['empty-required'][p_name] = ''
end
end
end
mw.logObject(res)
return res
end
-- wraps report in hidden frame
function wrapReport(report, template_name, options)
mw.logObject(report)
if util.empty( report ) then return '' end
local naked = mw.title.new( template_name )['text']
naked = mw.ustring.gsub(naked, 'Infobox', 'infobox', 1)
report = ( options['wrapper-prefix'] or "<div class = 'paramvalidator-wrapper'><span class='paramvalidator-error'>" )
.. report
.. ( options['wrapper-suffix'] or "</span></div>" )
report = mw.ustring.gsub( report, 'tname_naked', naked )
report = mw.ustring.gsub( report, 'templatename', template_name )
return report
end
-- this is the "user" version, called with {{#invoke:}} returns a string, as defined by the options parameter
function validateParams( frame )
local options, report, template_name = util.extract_options( frame ), '', frame:getParent():getTitle()
local ignore = function( p_name )
for _, pattern in ipairs( options['ignore'] or {} ) do
if mw.ustring.match( p_name, '^' .. pattern .. '$' ) then return true end
end
return false
end
local replace_macros = function( error_type, s, param_names )
function concat_and_escape( t , sep )
sep = sep or ', '
local s = table.concat( t, sep )
return ( mw.ustring.gsub( s, '%%', '%%%%' ) )
end
if s and ( type( param_names ) == 'table' ) then
local k_ar, kv_ar = {}, {}
for k, v in pairs( param_names ) do
table.insert( k_ar, k )
if type(v) == 'table' then
v = table.concat(v, ', ')
end
if error_type == 'duplicate' then
table.insert( kv_ar, v)
else
table.insert( kv_ar, k .. ': ' .. v)
end
end
s = mw.ustring.gsub( s, 'paramname', concat_and_escape( k_ar ) )
s = mw.ustring.gsub( s, 'paramandvalue', concat_and_escape( kv_ar, ' AND ' ) )
if mw.getCurrentFrame():preprocess( "{{REVISIONID}}" ) ~= "" then
s = mw.ustring.gsub( s, "<div.*<%/div>", "", 1 )
end
end
return s
end
local report_params = function( key, param_names )
local res = replace_macros( key, options[key], param_names )
res = frame:preprocess(res or '')
report = report .. ( res or '' )
return res
end
-- no option no work.
if util.table_empty( options ) then return '' end
-- get the errors.
local violations = calculateViolations( frame, options['doc-subpage'] )
-- special request of bora: use skip_empty_numeric
if violations['empty-undeclared-numeric'] then
for i = 1, tonumber( options['skip-empty-numeric'] ) or 0 do
violations['empty-undeclared-numeric'][i] = nil
end
end
-- handle ignore list, and prune empty violations - in that order!
local offenders = 0
for name, tab in pairs( violations ) do
-- remove ignored parameters from all violations
for pname in pairs( tab ) do if ignore( pname ) then tab[pname] = nil end end
-- prune empty violations
if util.table_empty( tab ) then violations[name] = nil end
-- WORK IS DONE. report the errors.
-- if report then count it.
if violations[name] and report_params( name, tab ) then offenders = offenders + 1 end
end
if offenders > 1 then report_params( 'multiple' ) end
if offenders ~= 0 then report_params( 'any' ) end -- could have tested for empty( report ), but since we count them anyway...
return wrapReport(report, template_name, options)
end
return {
['validateparams'] = validateParams,
['calculateViolations'] = calculateViolations,
['wrapReport'] = wrapReport
}