Module:Redirect hatnote

-- -- This module produces a "redirect" hatnote. It looks like this: -- '"X" redirects here. For other uses, see Y.' -- It implements the template. --

local mHatnote = require('Module:Hatnote') local libraryUtil = require('libraryUtil') local checkType = libraryUtil.checkType local checkTypeMulti = libraryUtil.checkTypeMulti

local p = {}

local function getTitle(...) local success, titleObj = pcall(mw.title.new, ...) if success then return titleObj else return nil end end

function p.redirect(frame) -- Get the args table and work out the maximum arg key. local origArgs = frame:getParent.args local args = {} local maxArg = 0 for k, v in pairs(origArgs) do		if type(k) == 'number' and k > maxArg then maxArg = k		end v = v:match('^%s*(.-)%s*$') -- Trim whitespace if v ~= '' then args[k] = v		end end

--Get table of redirects local numRedirects = tonumber(frame.args[1]) or 1 local redirect = {} for i = 1, numRedirects do -- Return an error if no redirect was specified. if not args[i] then return mHatnote.makeWikitextError(				'no redirect specified',				'Template:Redirect#Errors',				args.category			) end redirect[i] = args[i] end

-- Create the data table. local data = {} local iArg = numRedirects - 1 local iData = 1 repeat iArg = iArg + 2 local useTable = data[iData] or {} local pages = useTable.pages or {} local use = args[iArg] local page = args[iArg + 1] local nextUse = args[iArg + 2] pages[#pages + 1] = page useTable.pages = pages if use ~= 'and' then useTable.use = use end data[iData] = useTable if nextUse ~= 'and' then iData = iData + 1 end until iArg >= maxArg - 1

-- Create the options table. local options = {} options.selfref = args.selfref return p._redirect(redirect, data, options) end

local function formatUseTable(useTable, isFirst, redirect) -- Formats one use table. Use tables are the tables inside the data array. -- Each one corresponds to one use. (A use might be the word "cats" in the	-- phrase "For cats, see Felines".) -- Returns a string, or nil if no use was specified. -- The isFirst parameter is legacy, but partly maintained for its effect of -- cancelling empty use items. useTable = useTable or {} local use if not (useTable.use or isFirst) then return nil end use = useTable.use or 'other uses' local pages = useTable.pages or {} redirect = redirect[1] or error(		'no redirect was supplied',		2	) pages[1] = pages[1] or redirect .. ' (disambiguation)' pages = mHatnote.formatPages(unpack(pages)) pages = mw.text.listToText(pages) return string.format(		'For %s, see %s.',		use,		pages	) end

function p._redirect(redirect, data, options, currentTitle, redirectTitle, targetTitle) -- Validate the input. Don't bother checking currentTitle, redirectTitle or -- targetTitle, as they are only used in testing. checkTypeMulti('_redirect', 1, redirect, {'string', 'table'}) -- String type can stay valid until extant use-cases are checked-for and -- updated, but we'll coerce them to table for now if type(redirect) == 'string' then redirect = {redirect} end checkType('_redirect', 2, data, 'table', true) checkType('_redirect', 3, options, 'table', true) data = data or {} options = options or {} currentTitle = currentTitle or mw.title.getCurrentTitle

-- Generate the text. local text = {} local formattedRedirect = {} for k,v in pairs(redirect) do formattedRedirect[k] = '"' .. v .. '"' end text[#text + 1] = mw.text.listToText(formattedRedirect) .. ' ' .. (#redirect == 1 and 'redirects' or 'redirect') .. ' here.' text[#text + 1] = formatUseTable(data[1] or {}, true, redirect) if data[1] and data[1].use then if data[1].use ~= 'other uses' then for i = 2, #data do				text[#text + 1] = formatUseTable(data[i] or {}, false, redirect) end elseif #data > 1 then text[#text] = text[#text] .. ''		end end text = table.concat(text, ' ') local categoryTable = {} --add categories to a table by index, so we don't get duplicates function addCategory(cat) if cat and cat ~= '' then categoryTable[string.format('', cat)] = true end end

local mhOptions = {} for k,v in pairs(redirect) do -- Generate the tracking category. -- We don't need a tracking category if the template invocation has been -- copied directly from the docs, or if we aren't in main- or category-space. if not v:find('^REDIRECT%d*$') and v ~= 'TERM' -- and currentTitle.namespace == 0 or currentTitle.namespace == 14 then redirectTitle = redirectTitle or getTitle(v) if not redirectTitle or not redirectTitle.exists then addCategory('Missing redirects') elseif not redirectTitle.isRedirect then addCategory('Articles with redirect hatnotes needing review') else local mRedirect = require('Module:Redirect') local target = mRedirect.getTarget(redirectTitle) targetTitle = targetTitle or target and getTitle(target) if targetTitle and targetTitle ~= currentTitle then addCategory('Articles with redirect hatnotes needing review') end end end

-- Generate the options to pass to Module:Hatnote. if currentTitle.namespace == 0 and not mhOptions.selfref and redirectTitle and redirectTitle.namespace ~= 0 then -- We are on a mainspace page, and the hatnote starts with something -- like "Wikipedia:Foo redirects here", so automatically label it as -- a self-reference. mhOptions.selfref = true else mhOptions.selfref = options.selfref end end --concatenate all the categories local category = '' for k,v in pairs(categoryTable) do category = category .. k	end

return mHatnote._hatnote(text, mhOptions) .. category end return p