local getArgs = require('Module:Arguments').getArgs

local tableTools = require('Module:TableTools')

local yesno = require('Module:Yesno')

local mRedirect = require('Module:Redirect')

local defaultNewPagename = '?' -- Name of new pages that haven't been specified

local p = {}

local function err(msg, numargs, reason, count)

-- Generates a wikitext error message

local commented = ''

return string.format('{{error|%s}}', msg) .. commented

end

local function validateTitle(page, paramName, paramNum)

-- Validates a page name, and if it is valid, returns true and the title

-- object for that page. If it is not valid, returns false and the

-- appropriate error message.

-- Check for a small subset of characters that cannot be used in MediaWiki

-- titles. For the full set of restrictions, see

-- Page name#Technical restrictions and limitations. This is

-- also covered by the invalid title check, but with this check we can give

-- a more specific error message.

local invalidChar = page:match('[#<>%[%]|{}]')

if invalidChar then

local msg = 'Invalid character "'

.. invalidChar

.. '" found in the "'

.. paramName

.. paramNum

.. '" parameter'

return false, msg

end

-- Get the title object. This also checks for invalid titles that aren't

-- covered by the previous check.

local titleObj = mw.title.new(page)

if not titleObj then

local msg = 'Invalid title detected in parameter "'

.. paramName

.. paramNum

.. '"; check for [[Wikipedia:Page name#'

.. 'Technical restrictions and limitations|invalid characters]]'

return false, msg

end

-- Check for interwiki links. Titles with interwikis make valid title

-- objects, but cannot be created on the local wiki.

local interwiki = titleObj.interwiki

if interwiki and interwiki ~= then

local msg = 'Invalid title detected in parameter "'

.. paramName

.. paramNum

.. '"; has interwiki prefix "'

.. titleObj.interwiki

.. ':"'

return false, msg

end

return true, titleObj

end

function p.validateTitle(frame)

local value = frame.args[1]

local validTitle, currentTitle = validateTitle(value or , '1', )

if not validTitle then

-- If invalid, the second parameter is the error message.

local msg = currentTitle

return msg

end

return 'yes'

end

function p.main(frame)

----------------------------------------------------------------------------

-- Initialise variables and preprocess the arguments

----------------------------------------------------------------------------

local args = getArgs(frame, {parentOnly = true})

local title = mw.title.getCurrentTitle()

--[[

-- To iterate over the current1, new1, current2, new2, ... arguments

-- we get an array of tables sorted by number and compressed so that

-- it can be traversed with ipairs. The table format looks like this:

-- {

-- {current = x, new = y, num = 1},

-- {current = z, new = q, num = 2},

-- ...

-- }

-- The "num" field is used to correctly preserve the number of the parameter

-- that was used, in case users skip any numbers in the invocation.

--

-- The current1 parameter is a special case, as it does not need to be

-- specified. To avoid clashes with later current parameters, we need to

-- add it to the args table manually.

--

-- Also, we allow the first positional parameter to be an alias for the

-- new1 parameter, so that the syntax for the old templates

-- {{requested move}} and {{move-multi}} will both be supported.

--

-- The "multi" variable tracks whether we are using the syntax previously

-- produced by {{requested move}}, or the syntax previously produced by

-- {{move-multi}}. For the former, multi is false, and for the latter it is

-- true.

--]]

if not args.current1 then

args.current1 = title.subjectPageTitle.prefixedText

end

-- Find the first new page title, if specified, and keep a record of the

-- prefix used to make it; the prefix will be used later to make error

-- messages.

local firstNewParam

if args.new1 then

firstNewParamPrefix = 'new'

elseif args[1] then

args.new1 = args[1]

firstNewParamPrefix =

else

firstNewParamPrefix =

end

-- Build the sorted argument table.

local argsByNum = {}

for k, v in pairs(args) do

k = tostring(k)

local prefix, num = k:match('^(%l*)([1-9][0-9]*)$')

if prefix == 'current' or prefix == 'new' then

num = tonumber(num)

local subtable = argsByNum[num] or {}

subtable[prefix] = v

subtable.num = num

argsByNum[num] = subtable

end

end

argsByNum = tableTools.compressSparseArray(argsByNum)

-- Calculate the number of arguments and whether we are dealing with a

-- multiple nomination.

local argsByNumCount = #argsByNum

local multi

if argsByNumCount >= 2 then

multi = true

else

multi = false

end

--[[

-- Validate new params.

-- This check ensures we don't have any absent new parameters, and that

-- users haven't simply copied in the values from the documentation page.

--]]

if multi then

for i, t in ipairs(argsByNum) do

local new = t.new

local num = t.num

if not new or new == 'New title for page ' .. tostring(num) then

argsByNum[i].new = defaultNewPagename

end

end

else

local new = argsByNum[1].new

if not new or new == 'NewName' then

argsByNum[1].new = defaultNewPagename

end

end

----------------------------------------------------------------------------

-- Error checks

----------------------------------------------------------------------------

-- Subst check

if not mw.isSubsting() then

local lb = mw.text.nowiki('{{')

local rb = mw.text.nowiki('}}')

local msg = ''

.. 'This template must be substituted;'

.. ' replace %srequested move%s with %ssubst:requested move%s'

.. ''

msg = string.format(msg, lb, rb, lb, rb)

return msg

end

-- Check we are on a talk page

if not title.isTalkPage then

local msg = 'Requested move must be used in a TALKSPACE, e.g., %s'

msg = string.format(msg, mw.site.namespaces[title.namespace].talk.name, title.text)

return err(msg, argsByNum, args.reason, argsByNumCount)

end

-- Check the arguments

local currentDupes, newDupes = {}, {}

for i, t in ipairs(argsByNum) do

local current = t.current

local new = t.new

local num = t.num

local validCurrent

local currentTitle

local subjectSpace

-- Check for invalid or missing currentn parameters

-- This check must come first, as mw.title.new will give an error if

-- it is given invalid input.

if not current then

local msg = '"current%d" parameter missing;'

.. ' please add it or remove the "new%d" parameter'

msg = string.format(msg, num, num)

return err(msg, argsByNum, args.reason, argsByNumCount)

end

-- Get the currentn title object, and check for invalid titles. This check

-- must come before the namespace and existence checks, as they will

-- produce script errors if the title object doesn't exist.

validCurrent, currentTitle = validateTitle(current, 'current', num)

if not validCurrent then

-- If invalid, the second parameter is the error message.

local msg = currentTitle

return err(msg, argsByNum, args.reason, argsByNumCount)

end

-- Category namespace check

subjectSpace = mw.site.namespaces[currentTitle.namespace].subject.id

if subjectSpace == 14 then

local msg = 'Requested move is not for categories,'

.. ' see Categories for discussion'

return err(msg, argsByNum, args.reason, argsByNumCount)

-- File namespace check

elseif subjectSpace == 6 then

local msg = 'Requested move is not for files;'

.. ' see Moving a page#Moving a file page'

.. ' (use Rename media instead)'

return err(msg, argsByNum, args.reason, argsByNumCount)

-- Draft and User namespace check

elseif subjectSpace == 2 or subjectSpace == 118 then

local msg = 'Requested move is not for moves from draft or user space.'

.. '
If you would like to submit your draft for review, add {{tlf|subst:submit}}'

.. 'to the top of the page.'

.. '
Otherwise, see How to move a page for instructions.'

.. '
If you cannot move it yourself, see Requesting technical moves.'

return err(msg, argsByNum, args.reason, argsByNumCount)

end

-- Request to move a single page must be placed on that page's talk, or the page it redirects to

if not multi and args.current1 ~= title.subjectPageTitle.prefixedText then

local idealpage = mw.title.new(args.current1).talkPageTitle

local rtarget = mRedirect.getTarget(idealpage)

if rtarget == title.prefixedText then

multi = true

else

local msg = 'Request to move a single page must be placed on that page\\'s talk or the page its talk redirects to'

return err(msg, argsByNum, args.reason, argsByNumCount)

end

end

-- Check for non-existent titles.

if not currentTitle.exists then

local msg = 'Must create %s before requesting that it be moved'

msg = string.format(msg, current)

return err(msg, argsByNum, args.reason, argsByNumCount)

end

-- Check for duplicate current titles

-- We know the id isn't zero because we have already checked for

-- existence.

local currentId = currentTitle.id

if currentDupes[currentId] then

local msg = 'Duplicate title detected ("'

.. currentTitle.prefixedText

.. '"); cannot move the same page to two different places'

return err(msg, argsByNum, args.reason, argsByNumCount)

else

currentDupes[currentId] = true

end

-- Check for invalid new titles. This check must come before the

-- duplicate title check for new titles, as it will produce a script

-- error if the title object doesn't exist.

local validNew, newTitle = validateTitle(

new,

multi and 'new' or firstNewParamPrefix,

num

)

if not validNew then

-- If invalid, the second parameter is the error message.

local msg = newTitle

return err(msg, argsByNum, args.reason, argsByNumCount)

end

-- Check for duplicate new titles.

-- We can't use the page_id, as new pages might not exist, and therefore

-- multiple pages may have an id of 0. Use the prefixedText as a

-- reasonable fallback. We also need to check that we aren't using the

-- default new page name, as we don't want it to be treated as a duplicate

-- page if more than one new page name has been omitted.

local newPrefixedText = newTitle.prefixedText

if newPrefixedText ~= defaultNewPagename then

if newDupes[newPrefixedText] then

local msg = 'Duplicate title detected ("'

.. newTitle.prefixedText

.. '"); cannot move two different pages to the same place'

return err(msg, argsByNum, args.reason, argsByNumCount)

else

newDupes[newPrefixedText] = true

end

end

end

----------------------------------------------------------------------------

-- Generate the heading

----------------------------------------------------------------------------

-- For custom values of |heading=, use those.

-- For |heading=no, |heading=n, etc., don't include a heading.

-- Otherwise use the current date as a heading.

local heading = args.heading or args.header

local useHeading = yesno(heading, heading)

if heading and useHeading == heading then

heading = '== ' .. heading .. ' ==\\'

elseif useHeading == false then

heading =

else

local lang = mw.language.getContentLanguage()

local headingDate = lang:formatDate('j F Y')

heading = '== Requested move ' .. headingDate .. ' ==\\'

end

----------------------------------------------------------------------------

-- Build the {{requested move/dated}} invocation

----------------------------------------------------------------------------

local rmd = {}

rmd[#rmd + 1] = '{{requested move/dated'

if multi then

rmd[#rmd + 1] = '|multiple=yes'

rmd[#rmd + 1] = '\|current1=' .. argsByNum[1].current

end

--[[

-- The first new title. This is used both by single and by multi; for single

-- it is the only parameter used. For single the parameter name is the first

-- positional parameter, and for multi the parameter name is "new1".

--]]

local new1param = multi and 'new1=' or

rmd[#rmd + 1] = '|' .. new1param .. argsByNum[1].new

-- Add the rest of the arguments for multi.

if multi then

for i = 2, argsByNumCount do

local t = argsByNum[i]

local numString = tostring(i)

local current = t.current

local new = t.new

rmd[#rmd + 1] = '|current' .. numString .. '=' .. current

rmd[#rmd + 1] = '|new' .. numString .. '=' .. new

end

-- The old multi template always has a bar before the closing curly

-- braces, so we will do that too.

rmd[#rmd + 1] = '|'

end

rmd[#rmd + 1] = '}}'

rmd = table.concat(rmd)

----------------------------------------------------------------------------

-- Generate the list of links to the pages to be moved

----------------------------------------------------------------------------

local linkList = {}

for i, t in ipairs(argsByNum) do

local current = t.current

local new = t.new

local msg = '\%s%s → '

if new ~= defaultNewPagename then

msg = msg .. '{{no redirect|%s}}'

else

msg = msg .. '%s'

end

local item = string.format(

msg,

multi and '* ' or , -- Don't make a list for single page moves.

current,

new

)

linkList[#linkList + 1] = item

end

linkList = table.concat(linkList)

----------------------------------------------------------------------------

-- Reason and talk blurb

----------------------------------------------------------------------------

-- Reason

local reason = args.reason or args[2] or 'Please place your rationale for the proposed move here.'

reason = '– ' .. reason

if yesno(args.sign or args.sig or args.signature or 'unspecified', not reason:match("~~~$")) then

reason = reason .. ' ~~~~'

end

-- Talk blurb

local talk

if yesno(args.talk, true) then

talk = frame:expandTemplate{title = 'Requested move/talk'}

else

talk =

end

----------------------------------------------------------------------------

-- Assemble the output

----------------------------------------------------------------------------

-- The old templates start with a line break, so we will do that too.

local ret = string.format(

'\%s%s\%s%s%s%s',

heading,

rmd,

linkList,

multi and '\' or ' ',

reason,

talk

)

return ret

end

return p

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