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2015-01-06T19:02:32Z

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--[[
-- 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 libraryUtil = require('libraryUtil')
local checkType = libraryUtil.checkType

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

-- Return an error if no redirect was specified.
local redirect = args[1]
if not redirect then
return mHatnote.makeWikitextError(
'no redirect specified',
'Template:Redirect#Errors',
args.category
)
end

-- Create the data table.
local data = {}
local iArg = 0
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 used to apply special formatting for the first
-- table in the data array. If isFirst is specified, the redirect parameter
useTable = useTable or {}
local use
if isFirst then
use = useTable.use or 'other uses'
elseif not useTable.use then
return nil
elseif tonumber(useTable.use) == 1 then
use = 'other uses'
else
use = useTable.use
end
local pages = useTable.pages or {}
if isFirst then
redirect = redirect or error(
'isFirst was set in formatUseTable, but no redirect was supplied',
2
)
pages[1] = pages[1] or redirect .. ' (disambiguation)'
else
pages[1] = pages[1] or useTable.use .. ' (disambiguation)'
end
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.
checkType('_redirect', 1, redirect, 'string')
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 = {}
text[#text + 1] = '"' .. redirect .. '" redirects here.'
text[#text + 1] = formatUseTable(data[1] or {}, true, redirect)
if data[1] and data[1].use and data[1].use ~= 'other uses' then
for i = 2, #data do
text[#text + 1] = formatUseTable(data[i] or {}, false)
end
end
text = table.concat(text, ' ')

-- 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 mainspace.
local category
if not redirect:find('^REDIRECT%d*$') and redirect ~= 'TERM' --
and currentTitle.namespace == 0
then
redirectTitle = redirectTitle or getTitle(redirect)
if not redirectTitle or not redirectTitle.exists then
category = 'Missing redirects'
elseif not redirectTitle.isRedirect then
category = 'Invalid redirects'
else
local mRedirect = require('Module:Redirect')
local target = mRedirect.getTarget(redirectTitle)
targetTitle = targetTitle or target and getTitle(target)
if targetTitle and targetTitle ~= currentTitle then
category = 'Invalid redirects'
end
end
end
category = category and string.format('[[Category:%s]]', category) or ''

-- Generate the options to pass to [[Module:Hatnote]].
local mhOptions = {}
if currentTitle.namespace == 0
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

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

return p

Module:Redirect hatnote - Revision history

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