Wikipedia>Wbm1058: Undid revision 941148733 by MSGJ (talk) per followup discussion at Template talk:Requested move#Hide advice when it was followed

2020-04-20T17:57:13Z

Undid revision 941148733 by MSGJ (talk) per followup discussion at Template talk:Requested move#Hide advice when it was followed

New page

-- This module implements {{requested move}}.

-- Load necessary modules
local getArgs = require('Module:Arguments').getArgs
local tableTools = require('Module:TableTools')
local yesno = require('Module:Yesno')
local mRedirect = require('Module:Redirect')

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

local p = {}

--------------------------------------------------------------------------------
-- Helper functions
--------------------------------------------------------------------------------

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
-- [[Wikipedia: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 [[Help:Interwiki linking|interwiki prefix]] "'
.. titleObj.interwiki
.. ':"'
return false, msg
end

return true, titleObj
end

--------------------------------------------------------------------------------
-- Validate title entry point (used at [[Template:RMassist/core]])
--------------------------------------------------------------------------------
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

--------------------------------------------------------------------------------
-- Main function
--------------------------------------------------------------------------------

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 [[Wikipedia:Template substitution|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 = '[[Template:Requested move]] must be used in a TALKSPACE, e.g., [[%s:%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 = '[[Template:Requested move]] is not for categories,'
.. ' see [[Wikipedia:Categories for discussion]]'
return err(msg, argsByNum, args.reason, argsByNumCount)

-- File namespace check
elseif subjectSpace == 6 then
local msg = '[[Template:Requested move]] is not for files;'
.. ' see [[Wikipedia:Moving a page#Moving a file page]]'
.. ' (use [[Template:Rename media]] instead)'
return err(msg, argsByNum, args.reason, argsByNumCount)

-- Draft and User namespace check
elseif subjectSpace == 2 or subjectSpace == 118 then
local msg = '[[Template:Requested move]] is not for moves from draft or user space.'
.. ' If you would like to submit your draft for review, add <code>{{tlf|subst:submit}}</code>'
.. 'to the top of the page.'
.. ' Otherwise, see [[Help:How to move a page]] for instructions.'
.. ' If you cannot move it yourself, see [[Wikipedia:Requested moves#Requesting technical moves|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 .. ' ==\n\n'
elseif useHeading == false then
heading = ''
else
local lang = mw.language.getContentLanguage()
local headingDate = lang:formatDate('j F Y')
heading = '== Requested move ' .. headingDate .. ' ==\n\n'
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] = '\n|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 = '\n%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(
'\n%s%s\n%s%s%s%s',
heading,
rmd,
linkList,
multi and '\n' or ' ',
reason,
talk
)
return ret
end

return p

Module:Requested move - Revision history

Wikipedia>Wbm1058: Undid revision 941148733 by MSGJ (talk) per followup discussion at Template talk:Requested move#Hide advice when it was followed