Module:UserLinks

--                                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. --	-- For documentation on how to add new link functions, please see -- Module:UserLinks.

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,			'Contributions/' .. snippets.username,			message('display-contributions')		) end

function linkFunctions.ct(snippets) -- Edit count return makeUrlLink(			{				host = 'tools.wmflabs.org',				path = '/supercount/index.php',				query = {					user = snippets.username,					project = snippets.toolLang .. '.' .. snippets.projectLong				}			},			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.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 = 'tools.wmflabs.org',				path = '/xtools/editsummary/index.php',				query = {					name = snippets.username,					lang = snippets.toolLang,					wiki = snippets.projectLong				}			},			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, user = 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 = '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. --]=]	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.

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 and return the result. if options.sup then toolbar = '' .. toolbar .. ''	end return userLink .. ' ' .. 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