Nonbinary Wiki

Module:Redirect: Difference between revisions

Module Discussion

Module:Redirect (edit)

Revision as of 11:43, 21 May 2021

1,669 bytes added ,  2 years ago
m
45 revisions imported from wikipedia:Module:Redirect: see Topic:Vtixlm0q28eo6jtf
No edit summary
m (45 revisions imported from wikipedia:Module:Redirect: see Topic:Vtixlm0q28eo6jtf)
 
(18 intermediate revisions by 8 users not shown)
Line 1: Line 1:
---- This module accepts the name of a single page.  It determines if the page is a redirect; if so it looks up the page, extracts the target, and returns the target name as text.  Its usage is {{#invoke:redirect|main|redirect-page-name}}.  The template neither takes nor gives square brackets, so to show the result as a link use [[{{#invoke:redirect|main|redirect-page-name}}]].  An error is produced if the redirect does not exist, but for versatility no error is given if the file is not a redirect (returns the original text) or if the file name is blank (returns blank).
-- This module provides functions for getting the target of a redirect page.


p={}
local p = {}


-- 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 or not titleObj.isRedirect then
return nil
end
-- Find the target by using string matching on the page content.
local target = p.getTargetFromText(titleObj:getContent() or "")
if target then
local targetTitle = getTitle(target)
if targetTitle then
if fulltext then
return targetTitle.fullText
else
return targetTitle.prefixedText
end
else
return nil
end
else
-- The page is a redirect, but matching failed. This indicates a bug in
-- the redirect matching pattern, so throw an error.
error(string.format(
'could not parse redirect on page "%s"',
fulltext and titleObj.fullText or titleObj.prefixedText
))
end
end
--[[
-- 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)
  args=frame.args
local args = require('Module:Arguments').getArgs(frame, {frameOnly = true})
  parent=frame.getParent(frame)
return p.luaMain(args[1], args.bracket, args.fulltext) or ''
  if parent then pargs = parent.args else pargs={} end
end
  local rname=args[1] or pargs[1] or ""
 
  local bracket=args.bracket or pargs.bracket
-- Returns true if the specified page is a redirect, and false otherwise.
  local bb = "";local be= "" -- store brackets if restoring to an output if bracket option is set
function p.luaIsRedirect(page)
  if rname then
local titleObj = getTitle(page)
      if mw.ustring.gsub(rname,"%s","") == "" then return "" end
if not titleObj then
      if bracket then
return false
          local strip=mw.ustring.match(rname,"%[%[(.+)%]%]")
end
          if strip then rname=strip;bb="[[";be="]]" end
if titleObj.isRedirect then
      end
return true
      else return ""
else
  end
return false
  local rpage=mw.title.new(rname)
end
  local err=""
end
  if rpage then -- avoid possibly expensive FileExists if we don't have anything
 
      if rpage.id ~= 0 then
-- Provides access to the luaIsRedirect function from wikitext, returning 'yes'
      -- if rpage.fileExists then
-- if the specified page is a redirect, and the blank string otherwise.
            if rpage.isRedirect then
function p.isRedirect(frame)
              return (bb.. tostring(mw.ustring.match(tostring(rpage.getContent(rpage)),"REDIRECT.-%[%[(.-)%]%]")..be) or [=[<span style="text-color:red;">[[Module:redirect]] error: failed to understand - [[]=] .. rname .. [=[]]</span]=])
local args = require('Module:Arguments').getArgs(frame, {frameOnly = true})
            else return rname -- not a redirect so leave the original text (for some general-purpose template use)
if p.luaIsRedirect(args[1]) then
            end
return 'yes'
      --  else err="File does not exist: "
else
      --  end
return ''
      else err="File not found (id=0): "
end
      end
  else err="File not found (mw.title.new failed)"
  end
  return [=[<span style="text-color:red;">[[Module:redirect]] error: ]=] .. err .. [=[ - [[]=] .. rname .. [=[]]</span>]=]
end
end


return p
return p
Retrieved from "https://nonbinary.wiki/wiki/Special:MobileDiff/30861...30880"