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Line 1: − + − -- passed page name when not a redirect. The passed page name can be given as plain text or as a page link. − -- Returns page name as plain text, or when the bracket parameter is given, as a page link. Returns an − -- error message when page does not exist or the redirect target cannot be determined for some reason. − + − + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + − + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + − -- If called via #invoke, use the args passed into the invoking+ − -- template, or the args passed to #invoke if any exist. Otherwise+ − -- assume args are being passed directly in from the debug console+ − -- or from another Lua module.+ − local origArgs+ − if frame == mw.getCurrentFrame() then+ − origArgs = frame:getParent().args+ − for k, v in pairs( frame.args ) do+ − origArgs = frame.args+ − break+ − end+ − else+ − origArgs = frame+ − end+ − -- Trim whitespace and remove blank arguments.+ − local args = {}+ − for k, v in pairs( origArgs ) do − v = mw.text.trim( v ) − if v ~= '' then − args[k] = v − end − end − local rname, bracket = args[1], args.bracket − − if type(rname) ~= "string" or not mw.ustring.match(rname, "%S") then return end − bracket = bracket and "[[%s]]" or "%s" − rname = mw.ustring.match(rname, "%[%[(.+)%]%]") or rname − − -- Get the title object, passing the function through pcall − -- in case we are over the expensive function count limit. − local noError, rpage = pcall(mw.title.new, rname) − if not noError or noError and not rpage or not rpage.isRedirect then − -- mw.title.new failed, or the page is not a redirect, so use the passed page name. − return mw.ustring.format(bracket, rname) − end − local redirect = mw.ustring.match(rpage:getContent() or "", "^%s*#[Rr][Ee][Dd][Ii][Rr][Ee][Cc][Tt]%s*:?%s*%[%[([^%[%]]-)%]%]" )+ − if redirect then+ − -- Decode html entities and percent encodings.+ − redirect = mw.text.decode(redirect, true)+ − redirect = mw.uri.decode(redirect, 'WIKI')+ − return mw.ustring.format(bracket, redirect)+ − else+ − return mw.ustring.format('<span class="error">[[Module:redirect]] error: could not parse redirect - [[%s]]</span>', rname)+ − end+
restore p.getTargetFromText which is used by Module:RfD which is causing "Lua error in Module:RfD at line 87: attempt to call upvalue 'getTargetFromText' (a nil value)"
-- Given a single page name determines what page it redirects to and returns the target page name, or the
-- This module provides functions for getting the target of a redirect page.
-- Thus these are roughly the same:
local p = {}
-- [[{{#invoke:redirect|main|redirect-page-name}}]] and {{#invoke:redirect|main|redirect-page-name|bracket=yes}}
-- Gets a mw.title object, using pcall to avoid generating script errors if we
-- are over the expensive function count limit (among other possible causes).
local function getTitle(...)
local success, titleObj = pcall(mw.title.new, ...)
if success then
return titleObj
else
return nil
end
end
-- Gets the name of a page that a redirect leads to, or nil if it isn't a
-- redirect.
function p.getTargetFromText(text)
local target = string.match(
text,
"^%s*#[Rr][Ee][Dd][Ii][Rr][Ee][Cc][Tt]%s*:?%s*%[%[([^%[%]|]-)%]%]"
) or string.match(
text,
"^%s*#[Rr][Ee][Dd][Ii][Rr][Ee][Cc][Tt]%s*:?%s*%[%[([^%[%]|]-)|[^%[%]]-%]%]"
)
return target and mw.uri.decode(target, 'PATH')
end
-- Gets the target of a redirect. If the page specified is not a redirect,
-- returns nil.
function p.getTarget(page, fulltext)
-- Get the title object. Both page names and title objects are allowed
-- as input.
local titleObj
if type(page) == 'string' or type(page) == 'number' then
titleObj = getTitle(page)
elseif type(page) == 'table' and type(page.getContent) == 'function' then
titleObj = page
else
error(string.format(
"bad argument #1 to 'getTarget'"
.. " (string, number, or title object expected, got %s)",
type(page)
), 2)
end
if not titleObj then
return nil
end
local targetTitle = titleObj.redirectTarget
if targetTitle then
if fulltext then
return targetTitle.fullText
else
return targetTitle.prefixedText
end
else
return nil
end
end
local p = {}
--[[
-- Given a single page name determines what page it redirects to and returns the
-- target page name, or the passed page name when not a redirect. The passed
-- page name can be given as plain text or as a page link.
--
-- Returns page name as plain text, or when the bracket parameter is given, as a
-- page link. Returns an error message when page does not exist or the redirect
-- target cannot be determined for some reason.
--]]
function p.luaMain(rname, bracket, fulltext)
if type(rname) ~= "string" or not rname:find("%S") then
return nil
end
bracket = bracket and "[[%s]]" or "%s"
rname = rname:match("%[%[(.+)%]%]") or rname
local target = p.getTarget(rname, fulltext)
local ret = target or rname
ret = getTitle(ret)
if ret then
if fulltext then
ret = ret.fullText
else
ret = ret.prefixedText
end
return bracket:format(ret)
else
return nil
end
end
-- Provides access to the luaMain function from wikitext.
function p.main(frame)
function p.main(frame)
local args = require('Module:Arguments').getArgs(frame, {frameOnly = true})
return p.luaMain(args[1], args.bracket, args.fulltext) or ''
end
-- Returns true if the specified page is a redirect, and false otherwise.
function p.luaIsRedirect(page)
local titleObj = getTitle(page)
if not titleObj then
return false
end
if titleObj.isRedirect then
return true
else
return false
end
end
-- Provides access to the luaIsRedirect function from wikitext, returning 'yes'
-- if the specified page is a redirect, and the blank string otherwise.
function p.isRedirect(frame)
local args = require('Module:Arguments').getArgs(frame, {frameOnly = true})
if p.luaIsRedirect(args[1]) then
return 'yes'
else
return ''
end
end
end
return p
return p