Module:UserLinks

This module generates links about a given user. It is used to generate templates such as {{user}}, {{user5}}, and {{admin}}, usually through its wrapper template {{user-multi}}.

Functions

Main

The main function implements the {{user-multi}} template. It generates a list of links about a given user. Please see the template page for documentation.

Single

The single function generates a single link about a given user. See {{user-multi/link}} for documentation.

Link table

The linktable function generates a wikitext table containing the possible link codes that can be used with the main and single functions, along with example output for each code. It is used on the documentation pages at Template:User-multi/doc and Template:User-multi/link/doc.

It is displayed with the following code:

{{#invoke:UserLinks|linktable}}

Porting to other wikis

If you want to use this module on another wiki, there are a few modules that you must also copy across, and some that can be used but are not essential.

Required modules:

• Module:UserLinks
• Module:UserLinks/shared
• Module:UserLinks/config
• Module:Arguments
• Module:Yesno
• Module:Toolbar
• Module:InterwikiTable
• Module:TableTools (optional in Module:UserLinks, but required by Module:Toolbar)

Optional modules:

• Module:UserLinks/extra - used for testing new link functions before they are moved to the main module.
• Module:Category handler - if an error occurs, and this module is present, pages are not categorised if they match the module's blacklist.

After you have copied over the necessary modules, you should adjust the configuration settings in Module:UserLinks/config for your language and for your wiki's setup.

---

--------------------------------------------------------------------------------
--                                 UserLinks                                  --
-- This module creates a list of links about a given user. It can be used on  --
-- its own or from a template. See the /doc page for more documentation.      --
--------------------------------------------------------------------------------

-- Require necessary modules
local yesno = require('Module:Yesno')

-- Lazily initialise modules that we might or might not need
local mExtra -- [[Module:UserLinks/extra]]
local mArguments -- [[Module:Arguments]]
local mToolbar -- [[Module:Toolbar]]
local mCategoryHandler -- [[Module:Category handler]]
local mTableTools -- [[Module:TableTools]]
local interwikiTable -- [[Module:InterwikiTable]], loaded with mw.loadData

-- Load shared helper functions
local mShared = require('Module:UserLinks/shared')
local raiseError = mShared.raiseError
local maybeLoadModule = mShared.maybeLoadModule
local makeWikitextError = mShared.makeWikitextError
local makeWikilink = mShared.makeWikilink
local makeUrlLink = mShared.makeUrlLink
local makeFullUrlLink = mShared.makeFullUrlLink
local message = mShared.message

local p = {}

--------------------------------------------------------------------------------
-- Link table
--------------------------------------------------------------------------------

function p.getLinks(snippets)
	--[=[
	-- Get a table of links that can be indexed with link codes. The table
	-- returned is blank, but links are added to it on demand when it is
	-- indexed. This is made possible by the metatable and by the various link
	-- functions, some of which are defined here, and some of which are defined
	-- at [[Module:UserLinks/extra]].
	--]=]
	local links, linkFunctions = {}, {}

	----------------------------------------------------------------------------
	-- Link functions
	--
	-- The following functions make the links from the link codes and the user
	-- data snippets. New link functions should be added below the existing
	-- functions.
	----------------------------------------------------------------------------

	function linkFunctions.u(snippets)
		-- User page
		return makeWikilink(
			snippets.interwiki,
			2,
			snippets.username,
			snippets.username
		)
	end

	function linkFunctions.t(snippets)
		-- User talk page
		return makeWikilink(
			snippets.interwiki,
			3,
			snippets.username,
			message('display-talk')
		)
	end

	function linkFunctions.c(snippets)
		-- Contributions
		return makeWikilink(
			snippets.interwiki,
			-1,
			'Contribs/' .. snippets.username,
			message('display-contributions')
		)
	end
	
	function linkFunctions.c64(snippets)
		-- Contributions
		local first64 = snippets.username:match('^%x+:%x+:%x+:%x+:')
			or snippets.username:match('^%x+:%x+:%x+:')
			or snippets.username:match('^%x+:%x+:')
			or snippets.username:match('^%x+:')
		return first64 and makeWikilink(
			snippets.interwiki,
			-1,
			'Contribs/' .. first64 .. ':/64',
			'(/64)'
		) or ''
	end

	function linkFunctions.ct(snippets)
		-- Edit count
		return makeUrlLink(
			{
				host = 'xtools.wmflabs.org',
				path = '/ec/',
				query = {
					username = snippets.username,
					project = snippets.toolLang .. '.' .. snippets.projectLong .. '.org'
				}
			},
			message('display-count')
		)
	end

	function linkFunctions.m(snippets)
		-- Page moves
		return makeWikilink(
			snippets.interwiki,
			-1,
			'Log/move/' .. snippets.username,
			message('display-moves')
		)
	end

	function linkFunctions.l(snippets)
		-- Logs
		return makeWikilink(
			snippets.interwiki,
			-1,
			'Log/' .. snippets.username,
			message('display-logs')
		)
	end

	function linkFunctions.ae(snippets)
		-- Automated edits (and non-automated contributions).
		return makeUrlLink(
			{
				host = 'xtools.wmflabs.org',
				path = '/autoedits/',
				query = {
					username = snippets.username,
					project = snippets.toolLang .. '.' .. snippets.projectLong .. '.org'
				}
			},
			message('display-autoedits')
		)
	end

	function linkFunctions.bl(snippets)
		-- Block log
		return makeFullUrlLink(
			snippets.interwiki,
			-1,
			'Log/block',
			{page = 'User:' .. snippets.username},
			message('display-blocklog')
		)
	end

	function linkFunctions.bls(snippets)
		-- Blocks
		return makeWikilink(
			snippets.interwiki,
			-1,
			'Log/block/' .. snippets.username,
			message('display-blocks')
		)
	end

	function linkFunctions.bu(snippets)
		-- Block user
		return makeWikilink(
			snippets.interwiki,
			-1,
			'Block/' .. snippets.username,
			message('display-blockuser')
		)
	end

	function linkFunctions.ca(snippets)
		-- Central auth
		return makeWikilink(
			snippets.interwiki,
			-1,
			'CentralAuth/' .. snippets.username,
			message('display-centralauth')
		)
	end

	function linkFunctions.dc(snippets)
		-- Deleted contribs
		return makeWikilink(
			snippets.interwiki,
			-1,
			'DeletedContributions/' .. snippets.username,
			message('display-deletedcontributions')
		)
	end

	function linkFunctions.e(snippets)
		-- Email
		return makeWikilink(
			snippets.interwiki,
			-1,
			'EmailUser/' .. snippets.username,
			message('display-email')
		)
	end

	function linkFunctions.es(snippets)
		-- Edit summaries
		return makeUrlLink(
			{
				host = 'xtools.wmflabs.org',
				path = '/editsummary/',
				query = {
					username = snippets.username,
					project = snippets.toolLang .. '.' .. snippets.projectLong .. '.org'
				}
			},
			message('display-editsummaries')
		)
	end

	function linkFunctions.del(snippets)
		-- Deletions
		return makeWikilink(
			snippets.interwiki,
			-1,
			'Log/delete/' .. snippets.username,
			message('display-deletions')
		)
	end

	function linkFunctions.lu(snippets)
		-- List user
		return makeFullUrlLink(
			snippets.interwiki,
			-1,
			'ListUsers',
			{limit = 1, username = snippets.username},
			message('display-listuser')
		)
	end

	function linkFunctions.sul(snippets)
		-- SUL
		return makeWikilink(
			nil,
			nil,
			'sulutil:' .. snippets.username,
			message('display-sul')
		)
	end

	function linkFunctions.tl(snippets)
		-- Target logs
		return makeFullUrlLink(
			snippets.interwiki,
			-1,
			'Log',
			{page = mw.site.namespaces[2].name .. ':' .. snippets.username},
			message('display-targetlogs')
		)
	end

	function linkFunctions.efl(snippets)
		-- Edit filter log
		return makeFullUrlLink(
			snippets.interwiki,
			-1,
			'AbuseLog',
			{wpSearchUser = snippets.username},
			message('display-abuselog')
		)
	end

	function linkFunctions.pr(snippets)
		-- Protections
		return makeWikilink(
			snippets.interwiki,
			-1,
			'Log/protect/' .. snippets.username,
			message('display-protections')
		)
	end

	function linkFunctions.rl(snippets)
		-- User rights
		return makeWikilink(
			snippets.interwiki,
			-1,
			'Log/rights/' .. snippets.username,
			message('display-rights')
		)
	end

	function linkFunctions.ren(snippets)
		-- Renames
		return makeWikilink(
			snippets.interwiki,
			-1,
			'Log/renameuser/' .. snippets.username,
			message('display-renames')
		)
	end

	function linkFunctions.rfa(snippets)
		-- Requests for adminship
		return makeWikilink(
			nil,
			-1,
			'PrefixIndex/' .. message('page-rfa') .. '/' .. snippets.username,
			message('display-rfa')
		)
	end

	function linkFunctions.api(snippets)
		-- API user data
		return makeUrlLink(
			{
				host = snippets.fullDomain,
				path = '/w/api.php',
				query = {
					action = 'query',
					list = 'users',
					usprop = 'groups|editcount',
					ususers = snippets.username
				}
			},
			message('display-api')
		)
	end

	function linkFunctions.up(snippets)
		-- Uploads
		return makeWikilink(
			snippets.interwiki,
			-1,
			'ListFiles/' .. snippets.username,
			message('display-uploads')
		)
	end
	
	----------------------------------------------------------------------------
	-- End of link functions
	----------------------------------------------------------------------------

	-- Define the metatable that memoizes the link functions, and fetches link
	-- functions from [[Module:UserLinks/extra]] if necessary.

	-- Lazily initialise the extraLinkFunctions table. We only want to load
	-- [[Module:UserLinks/extra]] as necessary, so it has a low transclusion
	-- count.
	local extraLinkFunctions

	-- Define functions for shared code in the metatable.
	local function validateCode(code)
		-- Checks whether code is a valid link code - i.e. checks that it is a
		-- string and that it is not the blank string. Returns the code if
		-- the check passes, and nil if not.
		if type(code) == 'string' and code ~= '' then
			return code
		else
			return nil
		end
	end

	local function getExtraLinkFunctions()
		-- Loads the table of extra link functions from the /extra module.
		-- If there is a problem with loading it, return false. We use the
		-- distinction between false and nil to record whether we have already
		-- tried to load it.
		if extraLinkFunctions ~= nil then
			return extraLinkFunctions
		end
		if mExtra == nil then
			-- If loading the module fails, maybeLoadModule returns false.
			-- Here we use the distinction between false and nil to record
			-- whether we have already tried to load the /extra module.
			mExtra = maybeLoadModule('Module:UserLinks/extra')
		end
		if type(mExtra) == 'table'
			and type(mExtra.linkFunctions) == 'table'
		then
			extraLinkFunctions = mExtra.linkFunctions
		else
			extraLinkFunctions = false
		end
		return extraLinkFunctions
	end

	local function memoizeExtraLink(code, func)
		local success, link = pcall(func, snippets)
		if success and type(link) == 'string' then
			links[code] = link
			return link
		end
		return nil
	end

	-- Define the metatable.
	setmetatable(links, {
		__index = function (t, key)
			local code = validateCode(key)
			if not code then
				raiseError(
					message('error-malformedlinkcode'),
					message('error-malformedlinkcode-section')
				)
			end
			local linkFunction = linkFunctions[code]
			local link
			if linkFunction then
				link = linkFunction(snippets)
				links[code] = link
			else
				extraLinkFunctions = getExtraLinkFunctions()
				if extraLinkFunctions then
					local extraLinkFunction = extraLinkFunctions[code]
					if type(extraLinkFunction) == 'function' then
						link = memoizeExtraLink(code, extraLinkFunction)
					end
				end
			end
			if link then
				return link
			else
				raiseError(
					message('error-invalidlinkcode', code),
					message('error-invalidlinkcode-section')
				)
			end
		end,
		__pairs = function ()
			extraLinkFunctions = getExtraLinkFunctions()
			if extraLinkFunctions then
				for code, func in pairs(extraLinkFunctions) do
					if validateCode(code) and type(func) == 'function' then
						memoizeExtraLink(code, func)
					end
				end
			end
			-- Allow built-in functions to overwrite extra functions.
			for code, func in pairs(linkFunctions) do
				local link = func(snippets)
				links[code] = link
			end
			return function (t, key)
				return next(links, key)
			end
		end
	})
	return links
end

--------------------------------------------------------------------------------
-- User data snippets
--------------------------------------------------------------------------------

function p.getSnippets(args)
	--[=[
	-- This function gets user data snippets from the arguments, and from
	-- [[Module:InterwikiTable]]. The data is loaded as necessary and memoized
	-- in the snippets table for performance. 
	--
	-- Snippets default to the blank string, '', so they can be used in
	-- concatenation operations without coders having to worry about raising
	-- errors. Because of this, the local functions snippetExists and
	-- getSnippet have been written to aid people writing new snippets. These
	-- functions treat the blank string as false. It is not necessary to return
	-- the blank string from a snippet function, as nil and false values are
	-- automatically converted into the blank string by the metatable.
	--
	-- If you add a new snippet, please document it at
	-- [[Module:UserLinks#Adding new links]].
	--]=]
	local snippets, snippetFunctions = {}, {}
	setmetatable(snippets, {
		__index = function (t, key)
			local snippetFunction = snippetFunctions[key]
			if snippetFunction then
				snippets[key] = snippetFunction() or ''
				return snippets[key]
			else
				raiseError(
					message('error-nosnippet', key),
					message('error-nosnippet-section')
				)
			end
		end
	})

	-- Define helper functions for writting the snippet functions.
	local function snippetExists(key)
		-- We have set the metatable up to make snippets default to '', so we
		-- don't have to test for false or nil.
		return snippets[key] ~= ''
	end

	local function getSnippet(key)
		local ret = snippets[key]
		if ret == '' then
			return nil
		else
			return ret
		end
	end

	-- Start snippet functions.

	function snippetFunctions.username()
		-- The username.
		local username = args.user or args.User
		return username or raiseError(
			message('error-nousername'),
			message('error-nousername-section')
		)
	end

	function snippetFunctions.usernameHtml()
		-- The username html-encoded. Spaces are encoded as pluses.
		return mw.uri.encode(snippets.username)
	end

	function snippetFunctions.project()
		-- The project name.
		-- Also does the work for snippetFunctions.interwikiTableKey, and adds
		-- the project value to snippets.lang if it is a valid language code.
		local project = args.Project or args.project
		if not project then
			return nil
		end
		local projectValidated, interwikiTableKey = p.validateProjectCode(project)
		if not projectValidated then
			if mw.language.isKnownLanguageTag(project) then
				if not snippetExists('lang') then
					snippets.lang = project
				end
			else
				raiseError(
					message('error-invalidproject', project),
					message('error-invalidproject-section')
				)
			end
		end
		snippets.interwikiTableKey = interwikiTableKey
		return project
	end

	function snippetFunctions.interwikiTableKey()
		-- The key for the project in Module:InterwikiTable.
		-- Relies on snippetFunctions.project to do the real work.
		local temp = snippets.project -- required; puts key in snippets table
		return rawget(snippets, 'interwikiTableKey')
	end

	function snippetFunctions.toolProject()
		-- The short project code for use with toolserver or labs. It is always
		-- present, even if the "project" argument is absent. The default value
		-- is the "snippet-project-default" message.
		local project = getSnippet('project')
		if not project then
			return message('snippet-project-default')
		else
			return project
		end
	end

	function snippetFunctions.projectLong()
		-- The long form of the project name, e.g. "wikipedia" or "wikibooks".
		local key = getSnippet('interwikiTableKey')
		if not key then
			return message('snippet-projectlong-default')
		end
		interwikiTable = interwikiTable or mw.loadData('Module:InterwikiTable')
		local prefixes = interwikiTable[key].iw_prefix
		-- Using prefixes[2] is a bit of a hack, but should find the long name
		-- most of the time.
		return prefixes[2] or prefixes[1] 
	end

	function snippetFunctions.lang()
		-- The language code.
		local lang = args.lang or args.Lang
		if not lang then
			return nil
		end
		if mw.language.isKnownLanguageTag(lang) then
			return lang
		else
			raiseError(
				message('error-invalidlanguage', lang),
				message('error-invalidlanguage-section')
			)
		end
	end

	function snippetFunctions.toolLang()
		-- The language code for use with toolserver or labs tools. It is always
		-- present, even if the "lang" argument is absent. The default value is
		-- the "snippet-lang-default" message. 
		return getSnippet('lang') or message('snippet-lang-default')
	end

	function snippetFunctions.interwiki()
		-- The interwiki prefix, consisting of the project and language values,
		-- separated by colons, e.g. ":wikt:es:".
		local project = getSnippet('project')
		local lang = getSnippet('lang')
		if not project and not lang then
			return nil
		end
		local ret = {}
		ret[#ret + 1] = project
		ret[#ret + 1] = lang
		return table.concat(ret, ':')
	end

	function snippetFunctions.fullDomain()
		-- The full domain name of the site, e.g. www.mediawiki.org,
		-- en.wikpedia.org, or ja.wikibooks.org.
		local fullDomain
		local lang = getSnippet('toolLang')
		local key = getSnippet('interwikiTableKey')
		if key then
			interwikiTable = interwikiTable or mw.loadData('Module:InterwikiTable')
			local domain = interwikiTable[key].domain
			local takesLangPrefix = interwikiTable[key].takes_lang_prefix
			if takesLangPrefix then
				fullDomain = lang .. '.' .. domain
			else
				fullDomain = domain
			end
		else
			fullDomain = lang .. '.wikipedia.org'
		end
		return fullDomain
	end

	-- End snippet functions. If you add a new snippet function, please
	-- document it at [[Module:UserLinks#Adding new links]].

	return snippets
end 

function p.validateProjectCode(s)
	-- Validates a project code, by seeing whether it is present in
	-- [[Module:InterwikiTable]]. If it is present, returns the code and the
	-- InterwikiTable key for the corresponding site. If not present,
	-- returns nil for both.
	interwikiTable = interwikiTable or mw.loadData('Module:InterwikiTable')
	for key, t in pairs(interwikiTable) do
		for i, prefix in ipairs(t.iw_prefix) do
			if s == prefix then
				return s, key
			end
		end
	end
	return nil, nil
end

--------------------------------------------------------------------------------
-- Main functions
--------------------------------------------------------------------------------

local function makeInvokeFunction(funcName)
	-- Makes a function that can be accessed from #invoke. This is only required
	-- for functions that need to access arguments.
	return function (frame)
		mArguments = require('Module:Arguments')
		local args = mArguments.getArgs(frame)
		return p[funcName](args)
	end
end

p.main = makeInvokeFunction('_main')

function p._main(args)
	-- The main function. This is the one called from [[Template:User-multi]],
	-- via p.main.
	local options = p.getOptions(args)
	local snippets = p.getSnippets(args)
	local codes = p.getCodes(args)
	local links = p.getLinks(snippets)
	-- Overload the built-in Lua error function to generate wikitext errors
	-- meant for end users to see. This makes things harder to debug when
	-- real errors occur, but it is the only realistic way to show wikitext
	-- errors and and still have sane code when using metatables, etc.
	local success, result = pcall(p.export, codes, links, options)
	if success then
		return result
	else
		return makeWikitextError(result, options.isDemo)
	end
end

function p.getOptions(args)
	-- Gets the options from the args table, so that we don't have to pass
	-- around the whole args table all the time.
	local options = {}
	options.isDemo = yesno(args.demo) or false
	options.toolbarStyle = yesno(args.small) and 'font-size: 90%;' or nil
	options.sup = yesno(args.sup, true)
	options.separator = args.separator
	options.span = args.span
	return options
end

function p.getCodes(args)
	-- Gets the link codes from the arguments. The codes aren't validated
	-- at this point.
	mTableTools = maybeLoadModule('Module:TableTools')
	local codes
	if mTableTools then
		codes = mTableTools.compressSparseArray(args)
	else
		codes = {}
		for i, code in ipairs(args) do
			codes[i] = code
		end
	end
	return codes
end

function p.export(codes, links, options)
	-- Make the user link.
	local userLink = links.u

	-- If we weren't passed any link codes, just return the user link.
	if #codes < 1 then
		return userLink
	end

	-- Make the toolbar.
	mToolbar = require('Module:Toolbar')
	local toolbarArgs = {}
	for i, code in ipairs(codes) do
		local link = links[code]
		toolbarArgs[#toolbarArgs + 1] = link
	end
	toolbarArgs.style = options.toolbarStyle
	toolbarArgs.separator = options.separator or 'dot'
	toolbarArgs.span = options.span
	local toolbar = mToolbar.main(toolbarArgs)

	-- Apply the sup option.
	if options.sup then
		toolbar = '<sup>' .. toolbar .. '</sup>'
	end
	
	-- If we are transcluding, add a non-breaking space, but if we are substing
	-- just use a normal space
	local space = mw.isSubsting() and ' ' or '&nbsp;'
	
	return userLink .. space .. toolbar
end

--------------------------------------------------------------------------------
-- Single link function
--------------------------------------------------------------------------------

p.single = makeInvokeFunction('_single')

function p._single(args)
	-- Fetches a single link from the link table.
	local options = p.getOptions(args)
	local snippets = p.getSnippets(args)
	local links = p.getLinks(snippets)
	local code = args[1]
	local success, link = pcall(p.exportSingle, links, code)
	if success then
		return link
	else
		return makeWikitextError(link, options.isDemo)
	end
end

function p.exportSingle(links, code)
	-- If any errors occur, they will probably occur here. This function
	-- exists purely so that all the errors that will occur in p._single can
	-- be handled using a single pcall.
	if not code then
		raiseError(
			message('error-nolinkcode'),
			message('error-nolinkcode-section')
		)
	end
	return links[code]
end

--------------------------------------------------------------------------------
-- Link table
--------------------------------------------------------------------------------

function p.linktable()
	-- Returns a wikitext table of link codes, with an example link for each
	-- one. This function doesn't take any arguments, so it can be accessed
	-- directly from wiki pages without using makeInvokeFunction.
	local args = {user = 'Example'}
	local snippets = p.getSnippets(args)
	local links = p.getLinks(snippets)

	-- Assemble the codes and links in order
	local firstCodes = {'u', 't', 'c'}
	local firstLinks, firstCodesKeys = {}, {}
	for i, code in ipairs(firstCodes) do
		firstCodesKeys[code] = true
		firstLinks[#firstLinks + 1] = {code, links[code]}
	end
	local secondLinks = {}
	for code, link in pairs(links) do
		if not firstCodesKeys[code] then
			secondLinks[#secondLinks + 1] = {code, link}
		end
	end
	table.sort(secondLinks, function(t1, t2)
		return t1[1] < t2[1]
	end)
	local links = {}
	for i, t in ipairs(firstLinks) do
		links[#links + 1] = t
	end
	for i, t in ipairs(secondLinks) do
		links[#links + 1] = t
	end

	-- Output the code table in table format
	local ret = {}
	ret[#ret + 1] = '{| class="wikitable plainlinks sortable"'
	ret[#ret + 1] = '|-'
	ret[#ret + 1] = '! ' .. message('linktable-codeheader')
	ret[#ret + 1] = '! ' .. message('linktable-previewheader')
	for i, t in ipairs(links) do
		local code = t[1]
		local link = t[2]
		ret[#ret + 1] = '|-'
		ret[#ret + 1] = "| '''" .. code .. "'''" 
		ret[#ret + 1] = '| ' .. link
	end
	ret[#ret + 1] = '|}'
	return table.concat(ret, '\n')
end 

return p