Module:Redirect hatnote
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This Lua module is used on approximately 55,000 pages and changes may be widely noticed. Test changes in the module's /sandbox or /testcases subpages, or in your own module sandbox. Consider discussing changes on the talk page before implementing them. |
This module is subject to page protection. It is a highly visible module in use by a very large number of pages, or is substituted very frequently. Because vandalism or mistakes would affect many pages, and even trivial editing might cause substantial load on the servers, it is protected from editing. |
This module produces a hatnote for disambiguating a page that is linked to by a given redirect. It implements the {{redirect}} hatnote template.
Usage from wikitext
This module cannot be used directly from wikitext. Please use the {{redirect}} or {{redirect2}} templates instead.
Usage from Lua
To use this module from Lua, first load the module.
local mRedirectHatnote = require('Module:Redirect hatnote')
The module can then be used with the following syntax:
mRedirectHatnote._redirect(redirect, data, options, titleObj)
See also
--[[
-- 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 = {}
--------------------------------------------------------------------------------
-- Helper functions
--------------------------------------------------------------------------------
local function getTitle(...)
--Calls mw.title.new and returns either a title object, or nil on error
local success, titleObj = pcall(mw.title.new, ...)
return success and titleObj or nil
end
--------------------------------------------------------------------------------
-- Main functions
--------------------------------------------------------------------------------
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] = mHatnote.quote(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 = {}
local 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 = {}
local redirTitle
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
redirTitle = redirectTitle or getTitle(v)
if not redirTitle or not redirTitle.exists then
addCategory('Missing redirects')
elseif not redirTitle.isRedirect then
if string.find(redirTitle:getContent(), '#invoke:RfD') then
addCategory('Articles with redirect hatnotes impacted by RfD')
else
addCategory('Articles with redirect hatnotes needing review')
end
else
local target = targetTitle or redirTitle.redirectTarget
if target and target ~= 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 redirTitle and redirTitle.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