Модуль:DependencyList

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Эта документация включена из Модуль:DependencyList/doc. Изменения можно предлагать на странице обсуждения.

Module:DependencyList генерирует список зависимостей используемые документациями к шаблонам или модулям.

---

local p = {}
local libraryUtil = require( 'libraryUtil' )
local enum = require( 'Module:Enum' )
local yn = require( 'Module:Yesno' )
local param = require( 'Module:Paramtest' )
local dpl = require( 'Module:DPLlua' )
local moduleIsUsed = false
local COLLAPSE_LIST_LENGTH_THRESHOLD = 5
local MAX_DYNAMIC_REQUIRE_LIST_LENGTH = 30
local dynamicRequireListQueryCache = {}

--- Used in case 'require( varName )' is found. Attempts to find a string value stored in 'varName'.
---@param content string    The content of the module to search in
---@param varName string
---@return string
local function substVarValue( content, varName )
	local res = content:match( varName .. '%s*=%s*(%b""%s-%.*)' ) or content:match( varName .. "%s*=%s*(%b''%s-%.*)" ) or ''
	if res:find( '^(["\'])[Mm]odule:[%S]+%1' ) and not res:find( '%.%.' ) and not res:find( '%%%a' ) then
		return mw.text.trim( res )
	else
		return ''
	end
end

---@param capture string
---@param content string    The content of the module to search in
---@return string
local function extractModuleName( capture, content )
	capture = capture:gsub( '^%(%s*(.-)%s*%)$', '%1' )

	if capture:find( '^(["\']).-%1$' ) then -- Check if it is already a pure string
		return capture
	elseif capture:find( '^[%a_][%w_]*$' ) then -- Check if if is a single variable
		return substVarValue( content, capture )
	end

	return capture
end

---@param str string
---@return string
local function formatModuleName( str )
	return (str:gsub( '^([\'\"])(.-)%1$', function(_, x) return x end ) -- Only remove quotes at start and end of string if both are the same type
			   :gsub( '_', ' ' )
			   :gsub( '^.', string.upper )
			   :gsub( ':(.)', function(x) return ':'..x:upper() end ))
end

--- Used in case a construct like 'require( "Module:wowee/" .. isTheBest )' is found.
--- Will return a list of pages which satisfy this pattern where 'isTheBest' can take any value.
---@param query string
---@return string[]     Sequence of strings
local function getDynamicRequireList( query )
	if query:find( '%.%.' ) then
		query = mw.text.split( query, '..', true )
		query = enum.map( query, function(x) return mw.text.trim(x) end )
		query = enum.map( query, function(x) return (x:match('^[\'\"](.-)[\'\"]$') or '%') end )
		query = table.concat( query )
	else
		_, query = query:match( '(["\'])(.-)%1' )
		query = query:gsub( '%%%a', '%%' )
	end
	query = query:gsub( '^[Mm]odule:', '' )

	if query:find( '^[Ee]xchange/' ) or query:find( '^[Dd]ata/' ) then
		return { 'Module:' .. query }   -- This format will later be used by formatDynamicQueryLink()
	end

	if dynamicRequireListQueryCache[ query ] then
		return dynamicRequireListQueryCache[ query ]
	end

	local list = dpl.ask{
		namespace = 'Module',
		titlematch = query,
		nottitlematch = '%/doc|'..query..'/%',
		distinct = 'strict',
		ignorecase = true,
		ordermethod = 'title',
		count = MAX_DYNAMIC_REQUIRE_LIST_LENGTH + 1,
		skipthispage = 'no',
		allowcachedresults = true,
		cacheperiod = 604800 -- One week
	}

	if #list > MAX_DYNAMIC_REQUIRE_LIST_LENGTH then
		list = { 'Module:' .. query }
	end

	dynamicRequireListQueryCache[ query ] = list

	return list
end

--- Returns a list of modules loaded and required by module 'moduleName'.
---@param moduleName string
---@param searchForUsedTemplates boolean
---@return string[], string[], string[]
local function getRequireList( moduleName, searchForUsedTemplates )
	local content = mw.title.new( moduleName ):getContent()
	local requireList = {}
	local loadDataList = {}
	local usedTemplateList = {}
	local dynamicRequirelist = {}
	local dynamicLoadDataList = {}

	assert( param.has_content( content ), string.format( '%s does not exist', moduleName ) )

	content = content:gsub( '%-%-%[(=-)%[.-%]%1%]', '' ):gsub( '%-%-[^\n]*', '' ) -- Strip comments

	local function dualGmatch( str, pat1, pat2 )
		local f1 = string.gmatch( str, pat1 )
		local f2 = string.gmatch( str, pat2 )
		return function()
			return f1() or f2()
		end
	end

	for match in dualGmatch( content, 'require%s*(%b())', 'require%s*((["\'])%s*[Mm]odule:.-%2)' ) do
		match = mw.text.trim( match )
		match = extractModuleName( match, content )

		if match:find( '%.%.' ) or match:find( '%%%a' ) then
			for _, x in ipairs( getDynamicRequireList( match ) ) do
				table.insert( dynamicRequirelist, x )
			end
		elseif match ~= '' then
			match = formatModuleName( match )

			if match == 'LibraryUtil' then
				match = 'Module:LibraryUtil'
			end

			table.insert( requireList, match )
		end
	end

	for match in dualGmatch( content, 'mw%.loadData%s*(%b())', 'mw%.loadData%s*((["\'])%s*[Mm]odule:.-%2)' ) do
		match = mw.text.trim( match )
		match = extractModuleName( match, content )

		if match:find( '%.%.' ) or match:find( '%%%a' ) then
			for _, x in ipairs( getDynamicRequireList( match ) ) do
				table.insert( dynamicLoadDataList, x )
			end
		elseif match ~= '' then
			match = formatModuleName( match )
			table.insert( loadDataList, match )
		end
	end

	for func, match in string.gmatch( content, 'pcall%s*%(([^,]+),([^%),]+)' ) do
		func = mw.text.trim( func )
		match = mw.text.trim( match )

		if func == 'require' then
			for _, x in ipairs( getDynamicRequireList( match ) ) do
				table.insert( dynamicRequirelist, x )
			end
		elseif func == 'mw.loadData' then
			for _, x in ipairs( getDynamicRequireList( match ) ) do
				table.insert( dynamicLoadDataList, x )
			end
		end
	end

	if searchForUsedTemplates then
		for preprocess in string.gmatch( content, ':preprocess%s*(%b())' ) do
			local function recursiveGMatch( str, pat )
				local list = {}
				local i = 0
				repeat
					for match in string.gmatch( list[i] or str, pat ) do
						table.insert( list, match )
					end
					i =  i + 1
				until i > #list or i > 100

				i = 0
				return function()
					i = i + 1
					return list[i]
				end
			end

			for template in recursiveGMatch( preprocess, '{(%b{})}' ) do
				local name = string.match( template, '{(.-)[|{}]' )
				if name ~= '' then
					if name:find( ':' ) then
						local ns = name:match( '^(.-):' )
						if enum.contains( {'', 'template', 'user'}, ns:lower() ) then
							table.insert( usedTemplateList, name )
						elseif ns == ns:upper() then
							table.insert( usedTemplateList, ns ) -- Probably a magic word
						end
					else
						if name:match( '^%u+$' ) or name == '!' then
							table.insert( usedTemplateList, name ) -- Probably a magic word
						else
							table.insert( usedTemplateList, 'Template:'..name )
						end
					end
				end
			end
		end
	end

	dynamicRequirelist = enum.reject( dynamicRequirelist, function(x) return (enum.contains(requireList, x) or enum.contains(loadDataList, x)) end )
	dynamicLoadDataList = enum.reject( dynamicLoadDataList, function(x) return (enum.contains(requireList, x) or enum.contains(loadDataList, x)) end )
	requireList = enum.insert( requireList, dynamicRequirelist )
	requireList = enum.unique( requireList )
	loadDataList = enum.insert( loadDataList, dynamicLoadDataList )
	loadDataList = enum.unique( loadDataList )
	usedTemplateList = enum.unique( usedTemplateList )
	table.sort( requireList )
	table.sort( loadDataList )
	table.sort( usedTemplateList )

	return requireList, loadDataList, usedTemplateList
end

--- Returns a list with module and function names used in all '{{#Invoke:moduleName|funcName}}' found on page 'templateName'.
---@param templateName string
---@return table<string, string>[]
local function getInvokeCallList( templateName )
	local content = mw.title.new( templateName ):getContent()
	local invokeList = {}

	assert( param.has_content( content ), string.format( '%s does not exist', templateName ) )

	for moduleName, funcName in string.gmatch( content, '{{[{|safeubt:}]-#[Ii]nvoke:([^|]+)|([^}|]+)[^}]*}}' ) do
		moduleName = string.format( 'Module:%s', mw.text.trim( moduleName ) )
		moduleName = formatModuleName( moduleName )
		funcName = mw.text.trim( funcName )
		table.insert( invokeList, {moduleName=moduleName, funcName=funcName} )
	end

	invokeList = enum.unique( invokeList, function(x) return x.moduleName..x.funcName end )
	table.sort( invokeList, function(x, y) return x.moduleName..x.funcName < y.moduleName..y.funcName end )

	return invokeList
end

--- Returns a list with TemplateStyles found on page 'templateName'.
---@param templateName string
---@return table<string>[]
local function getTemplateStylesList( templateName )
	local content = mw.title.new( templateName ):getContent()
	local styleList = {}

	assert( param.has_content( content ), string.format( '%s does not exist', templateName ) )

	for styleName in string.gmatch( content, '<templatestyles src="(.+)"' ) do
		if string.find( styleName, ':', 1, true ) then
			styleName = mw.text.trim( styleName )
		else
			styleName = string.format( 'Template:%s', mw.text.trim( styleName ) )
		end
		styleName = formatModuleName( styleName )
		table.insert( styleList, {styleName=styleName} )
	end

	styleList = enum.unique( styleList, function(x) return x.styleName end )
	table.sort( styleList, function(x, y) return x.styleName < y.styleName end )

	return styleList
end

---@param pageName string
---@param addCategories boolean
---@return string
local function messageBoxUnused( pageName, addCategories )
	local html = mw.html.create( 'div' ):addClass( 'mbox mbox-med mbox-unusedmodule' ):attr( 'role', 'presentation')
	html:tag( 'span' )
		:addClass( 'mbox-title' )
		:tag( 'span' )
		:addClass( 'mbox-icon metadata' )
		:wikitext( '[[File:OOjs UI icon alert.svg|14px|link=]]' )
		:done()
		:wikitext( 'This module is unused.' )
		:done()
		:tag( 'span' )
		:addClass( 'mbox-text' )
		:wikitext(
		string.format( 'Этот модуль не вызывается шаблоном и не требуется/не загружается другим модулем. Если это ошибка, обязательно добавьте <code>{{[[Template:Documentation|Documentation]]}}</code>/<code>{{[[Template:No documentation|No&nbsp;documentation]]}}</code> к документации вызывающего шаблона или родительского модуля.',
			pageName
		)
	)
		:wikitext( addCategories and '[[Category:Unused modules]]' or '' )
		:done()
		:done()
	return tostring( html )
end

local function collapseList( list, id, listType )
	local text = string.format( '%d %s', #list, listType )
	local button = '<span>' .. text .. ':</span>'
	list = enum.map( list, function(x) return '\n# '..x end )
	local content = '\n'..table.concat( list )..'\n\n'

	return { tostring( button ) .. tostring( content ) }
end

--- Creates a link to [[Special:Search]] showing all pages found by getDynamicRequireList() in case it found more than MAX_DYNAMIC_REQUIRE_LIST_LENGTH pages.
---@param query string      @This will be in a format like 'Module:Wowee/%' or 'Module:Wowee/%/data'
---@return string
local function formatDynamicQueryLink( query )
	local prefix = query:match( '^([^/]+)' )
	local linkText = query:gsub( '%%', '&lt; ... &gt;' )

	query = query:gsub( '^Module:',  '' )

	query = query:gsub( '([^/]+)/?', function ( match )
		if match == '%' then
			return '\\/[^\\/]+'
		else
			return '\\/"' .. match .. '"'
		end
	end )

	query = query:gsub( '^\\/', '' )

	query = string.format(
		'intitle:/%s%s/i -intitle:/%s\\/""/i -intitle:doc prefix:"%s"',
		query,
		query:find( '"$' ) and '' or '""',
		query,
		prefix
	)

	return string.format( '<span class="plainlinks">[%s %s]</span>', tostring( mw.uri.fullUrl( 'Special:Search', { search = query } ) ), linkText )
end

---@param templateName string
---@param addCategories boolean
---@param invokeList table<string, string>[]    @This is the list returned by getInvokeCallList()
---@return string
local function formatInvokeCallList( templateName, addCategories, invokeList )
	local category = addCategories and '[[Category:Lua-based templates]]' or ''
	local res = {}

	for _, item in ipairs( invokeList ) do
		table.insert( res, string.format(
			"<div role='note' class='hatnote'><div class=hatnote-container navigation-not-searchable'><span class='hatnote-icon metadata'>[[File:OOjs UI icon code.svg|14px|link=]]</span>'''%s''' invokes function '''%s''' in [[%s]] using [[Wikimeat:Lua|Lua]].</div></div>",
			templateName,
			item.funcName,
			item.moduleName
		) )
	end

	if #invokeList > 0 then
		table.insert( res, category )
	end

	return table.concat( res )
end

---@param moduleName string
---@param addCategories boolean
---@param whatLinksHere string    @A list generated by a dpl of pages in the Template namespace which link to moduleName.
---@return string
local function formatInvokedByList( moduleName, addCategories, whatLinksHere )
	local templateData = enum.map( whatLinksHere, function(x) return {templateName=x, invokeList=getInvokeCallList(x)} end )
	templateData = enum.filter( templateData, function(x)
		return enum.any( x.invokeList, function(y)
			return y.moduleName:lower() == moduleName:lower()
		end )
	end )

	local invokedByList = {}

	for _, template in ipairs( templateData ) do
		for _, invoke in ipairs( template.invokeList ) do
			table.insert( invokedByList, string.format( "function '''%s''' is invoked by [[%s]]", invoke.funcName, template.templateName ) )
		end
	end

	table.sort( invokedByList)

	local res = {}

	if #invokedByList > COLLAPSE_LIST_LENGTH_THRESHOLD then
		table.insert( res, string.format(
			"<div role='note' class='hatnote'><div class=hatnote-container navigation-not-searchable'><span class='hatnote-icon metadata'>[[File:OOjs UI icon code.svg|14px|link=]]</span>'''%s''' is invoked by %s.</div></div>",
			moduleName,
			collapseList( invokedByList, 'invokedBy', 'templates' )[1]
		) )
	else
		for _, item in ipairs( invokedByList ) do
			table.insert( res, string.format(
				"<div role='note' class='hatnote'><div class=hatnote-container navigation-not-searchable'><span class='hatnote-icon metadata'>[[File:OOjs UI icon code.svg|14px|link=]]</span>'''%s''' is invoked by %s.</div></div>",
				moduleName,
				item
			) )
		end
	end

	if #templateData > 0 then
		moduleIsUsed = true
		table.insert( res, (addCategories and '[[Category:Template invoked modules]]' or '') )
	end

	return table.concat( res )
end

---@param moduleName string
---@param addCategories boolean
---@param whatLinksHere string      @A list generated by a dpl of pages in the Module namespace which link to moduleName.
---@return string
local function formatRequiredByList( moduleName, addCategories, whatLinksHere )
	local childModuleData = enum.map( whatLinksHere, function ( title )
		local requireList, loadDataList = getRequireList( title )
		return {name=title, requireList=requireList, loadDataList=loadDataList}
	end )

	local requiredByList = enum.map( childModuleData, function ( item )
		if enum.any( item.requireList, function(x) return x:lower()==moduleName:lower() end ) then
			if item.name:find( '%%' ) then
				return formatDynamicQueryLink( item.name )
			else
				return '[[' .. item.name .. ']]'
			end
		end
	end )

	local loadedByList = enum.map( childModuleData, function ( item )
		if enum.any( item.loadDataList, function(x) return x:lower()==moduleName:lower() end ) then
			if item.name:find( '%%' ) then
				return formatDynamicQueryLink( item.name )
			else
				return '[[' .. item.name .. ']]'
			end
		end
	end )

	if #requiredByList > 0 or #loadedByList > 0 then
		moduleIsUsed  = true
	end

	if #requiredByList > COLLAPSE_LIST_LENGTH_THRESHOLD then
		requiredByList = collapseList( requiredByList, 'requiredBy', 'modules' )
	end

	if #loadedByList > COLLAPSE_LIST_LENGTH_THRESHOLD then
		loadedByList = collapseList( loadedByList, 'loadedBy', 'modules' )
	end

	local res = {}

	for _, requiredByModuleName in ipairs( requiredByList ) do
		table.insert( res, string.format(
			"<div role='note' class='hatnote'><div class=hatnote-container navigation-not-searchable'><span class='hatnote-icon metadata'>[[File:OOjs UI icon code.svg|14px|link=]]</span>'''%s''' is required by %s.</div></div>",
			moduleName,
			requiredByModuleName
		) )
	end

	if #requiredByList > 0 then
		table.insert( res, (addCategories and '[[Category:Modules required by modules]]' or '') )
	end

	for _, loadedByModuleName in ipairs( loadedByList ) do
		table.insert( res, string.format(
			"<div role='note' class='hatnote'><div class=hatnote-container navigation-not-searchable'><span class='hatnote-icon metadata'>[[File:OOjs UI icon code.svg|14px|link=]]</span>'''%s''' is loaded by %s.</div></div>",
			moduleName,
			loadedByModuleName
		) )
	end

	if #loadedByList > 0 then
		table.insert( res, (addCategories and '[[Category:Module data]]' or '') )
	end

	return table.concat( res )
end

local function formatRequireList( currentPageName, addCategories, requireList )
	local res = {}

	if #requireList > COLLAPSE_LIST_LENGTH_THRESHOLD then
		requireList = collapseList( requireList, 'require', 'modules' )
	end

	for _, requiredModuleName in ipairs( requireList ) do
		table.insert( res, string.format(
			"<div role='note' class='hatnote'><div class=hatnote-container navigation-not-searchable'><span class='hatnote-icon metadata'>[[File:OOjs UI icon code.svg|14px|link=]]</span>'''%s''' requires %s.</div></div>",
			currentPageName,
			requiredModuleName
		) )
	end

	if #requireList > 0 then
		table.insert( res, (addCategories and '[[Category:Modules requiring modules]]' or '') )
	end

	return table.concat( res )
end

local function formatLoadDataList( currentPageName, addCategories, loadDataList )
	local res = {}

	if #loadDataList > COLLAPSE_LIST_LENGTH_THRESHOLD then
		loadDataList = collapseList( loadDataList, 'loadData', 'modules' )
	end

	for _, loadedModuleName in ipairs( loadDataList ) do
		table.insert( res, string.format(
			"<div role='note' class='hatnote'><div class=hatnote-container navigation-not-searchable'><span class='hatnote-icon metadata'>[[File:OOjs UI icon code.svg|14px|link=]]</span>'''%s''' loads data from %s.</div></div>",
			currentPageName,
			loadedModuleName
		) )
	end

	if #loadDataList > 0 then
		table.insert( res, (addCategories and '[[Category:Modules using data]]' or '') )
	end

	return table.concat( res )
end

local function formatUsedTemplatesList( currentPageName, addCategories, usedTemplateList )
	local res = {}

	if #usedTemplateList > COLLAPSE_LIST_LENGTH_THRESHOLD then
		usedTemplateList = collapseList( usedTemplateList, 'usedTemplates', 'templates' )
	end

	for _, templateName in ipairs( usedTemplateList ) do
		table.insert( res, string.format(
			"<div role='note' class='hatnote'><div class=hatnote-container navigation-not-searchable'><span class='hatnote-icon metadata'>[[File:OOjs UI icon code.svg|14px|link=]]</span>'''%s''' transcludes  [[%s]] using <samp>frame:preprocess()</samp>.</div></div>",
			currentPageName,
			templateName
		) )
	end

	return table.concat( res )
end

---@param templateName string
---@param addCategories boolean
---@param styleList table<string>[]    @This is the list returned by getTemplateStylesList()
---@return string
local function formatTemplateStylesList( templateName, addCategories, styleList )
	local category = addCategories and '[[Category:Templates using TemplateStyles]]' or ''
	local res = {}

	for _, item in ipairs( styleList ) do
		table.insert( res, string.format(
			"<div role='note' class='hatnote'><div class=hatnote-container navigation-not-searchable'><span class='hatnote-icon metadata'>[[File:OOjs UI icon code.svg|14px|link=]]</span>'''%s''' invokes [[%s]] using [[Wikimeat:TemplateStyles|TemplateStyles]].</div></div>",
			templateName,
			item.styleName
		) )
	end

	if #styleList > 0 then
		table.insert( res, category )
	end

	return table.concat( res )
end

function p.main( frame )
	local args = frame:getParent().args
	return p._main( args[1], args.category, args.isUsed )
end

---@param currentPageName string|nil
---@param addCategories boolean|string|nil
---@return string
function p._main( currentPageName, addCategories, isUsed )
	libraryUtil.checkType( 'Module:RequireList._main', 1, currentPageName, 'string', true )
	libraryUtil.checkTypeMulti( 'Module:RequireList._main', 2, addCategories, {'boolean', 'string', 'nil'} )
	libraryUtil.checkTypeMulti( 'Module:RequireList._main', 3, isUsed, {'boolean', 'string', 'nil'} )

	local title = mw.title.getCurrentTitle()

	-- Leave early if not in module, template namespace or if module is part of exchange or data groups
	if param.is_empty( currentPageName ) and (
		( not enum.contains( {'Module', 'Template'}, title.nsText ) ) or
			( title.nsText == 'Module' and ( enum.contains( {'Exchange', 'Exchange historical', 'Data'}, title.text:match( '^(.-)/' ) ) ) )
	) then
		return ''
	end

	currentPageName = param.default_to( currentPageName, title.fullText )
	currentPageName = string.gsub( currentPageName, '/[Dd]oc$', '' )
	currentPageName = formatModuleName( currentPageName )
	addCategories = yn( param.default_to( addCategories, title.subpageText~='doc' ) )
	moduleIsUsed = yn( param.default_to( isUsed, false ) )

	if title.text:match( '^(.-)/' ) == 'Sandbox' then
		moduleIsUsed = true -- Don't show sandbox modules as unused
	end

	if currentPageName:find( '^Template:' ) then
		local invokeList = getInvokeCallList( currentPageName )
		local styleList = getTemplateStylesList( currentPageName )
		return formatInvokeCallList( currentPageName, addCategories, invokeList ) .. formatTemplateStylesList( currentPageName, addCategories, styleList )
	end

	local whatTemplatesLinkHere, whatModulesLinkHere = dpl.ask( {
		namespace = 'Template',
		linksto = currentPageName,
		distinct = 'strict',
		ignorecase = true,
		ordermethod = 'title',
		allowcachedresults = true,
		cacheperiod = 604800 -- One week
	}, {
		namespace = 'Module',
		linksto = currentPageName,
		nottitlematch = '%/doc|Exchange/%|Data/%|' .. currentPageName:gsub( 'Module:', '' ),
		distinct = 'strict',
		ignorecase = true,
		ordermethod = 'title',
		allowcachedresults = true,
		cacheperiod = 604800 -- One week
	} )

	local requireList, loadDataList, usedTemplateList = getRequireList( currentPageName, true )

	requireList = enum.map( requireList, function ( moduleName )
		if moduleName:find( '%%' ) then
			return formatDynamicQueryLink( moduleName )
		else
			return '[[' .. moduleName .. ']]'
		end
	end )

	loadDataList = enum.map( loadDataList, function ( moduleName )
		if moduleName:find( '%%' ) then
			return formatDynamicQueryLink( moduleName )
		else
			return '[[' .. moduleName .. ']]'
		end
	end )

	usedTemplateList = enum.map( usedTemplateList, function( templateName )
		if string.find( templateName, ':' ) then -- Real templates are prefixed by a namespace, magic words are not
			return '[['..templateName..']]'
		else
			return "'''&#123;&#123;"..templateName.."&#125;&#125;'''" -- Magic words don't have a page so make them bold instead
		end
	end )

	local res = {}

	table.insert( res, formatInvokedByList( currentPageName, addCategories, whatTemplatesLinkHere ) )
	table.insert( res, formatRequireList( currentPageName, addCategories, requireList ) )
	table.insert( res, formatLoadDataList( currentPageName, addCategories, loadDataList ) )
	table.insert( res, formatUsedTemplatesList( currentPageName, addCategories, usedTemplateList ) )
	table.insert( res, formatRequiredByList( currentPageName, addCategories, whatModulesLinkHere ) )

	if not moduleIsUsed then
		table.insert( res, 1, messageBoxUnused( currentPageName:gsub( 'Module:', '' ), addCategories ) )
	end

	return table.concat( res )
end

return p