Module:Redirect hatnote

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This documentation is transcluded from Module:Redirect hatnote/doc. Changes can be proposed in the talk page.

Module:Redirect hatnote is imported from Module:Redirect hatnote on Wikipedia.

This module is imported from the English Wikipedia. Although the visual appearance might be different, the functionality is identical. Please refer to the Wikipedia page for detailed documentation.

Module:Redirect hatnote's functions are invoked by Template:Redirect (function redirect).

Module:Redirect hatnote requires Module:Arguments, Module:Hatnote list, Module:Hatnote, Module:Redirect, and libraryUtil.

Function list
L 16 — getTitle L 25 — p.redirect L 36 — p._redirect L 70 — addCategory

Moduke:Redirect hatnote produces a hatnote for disambiguating a page that is linked to by a given redirect. It implements the {{redirect}} hatnote template.

---

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

local mHatnote = require('Module:Hatnote')
local mHatList = require('Module:Hatnote list')
local mArguments --lazily initialize
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)
	mArguments = require('Module:Arguments')
	local args = mArguments.getArgs(frame, {parentOnly=true})
	--Get number of redirects
	local numRedirects = tonumber(frame.args[1]) or 1
	-- Create the options table.
	local options = {}
	options.selfref = args.selfref
	return p._redirect(args, numRedirects, options)
end

function p._redirect(args, numRedirects, options, currentTitle, redirectTitle, targetTitle)
	-- Validate the input. Don't bother checking currentTitle, redirectTitle or
	-- targetTitle, as they are only used in testing.
	checkType('_redirect', 1, args, 'table')
	checkType('_redirect', 2, numRedirects, 'number', true)
	numRedirects = numRedirects or 1
	checkType('_redirect', 3, options, 'table', true)
	options = options or {}
	currentTitle = currentTitle or mw.title.getCurrentTitle()
	-- Get the table of redirects
	local redirect = {}
	for i = 1, numRedirects do
		-- Return an error if a redirect parameter is missing.
		if not args[i] then
			return mHatnote.makeWikitextError(
				'missing redirect parameter',
				'Template:Redirect#Errors',
				args.category
			)
		end
		redirect[i] = args[i]
	end
	-- Generate the text.
	local formattedRedirect = {}
	for k,v in pairs(redirect) do
		formattedRedirect[k] = '"' .. v .. '"'
	end
	local text = {
		mHatList.andList(formattedRedirect) .. ' ' .. (#redirect == 1 and 'redirects' or 'redirect') .. ' here.',
		mHatList._forSee(args, #redirect + 1, {title = redirect[1], extratext = args.text})
	}
	text = table.concat(text, ' ')
	-- Functionality for adding categories	
	local categoryTable = {}
	function addCategory(cat)
		if cat and cat ~= '' then
			-- Add by index to avoid duplicates
			categoryTable[string.format('[[Category:%s]]', cat)] = true
		end
	end
	--Generate tracking categories
	local mhOptions = {}
	for k,v in pairs(redirect) do
		-- 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
	
	mhOptions.icon = 'WikimediaUI-ArticleDisambiguation-ltr.svg'

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