Module:Redirect/sandbox: Difference between revisions

Revision as of 03:31, 16 May 2014

Revision as of 05:58, 16 May 2014

Line 6:

-- Thus these are roughly the same:

-- [[{{#invoke:redirect|main|redirect-page-name}}]] and {{#invoke:redirect|main|redirect-page-name|bracket=yes}}

local mArguments -- lazily initialise [[Module:Arguments]]

local p = {}

local function getTitle(...)

local success, rpagetitleObj = pcall(mw.title.new, rname...)

if not success or not rpage then

return titleObj

else

return nil

end

end

function p.main(frame)

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

local args = mArguments.getArgs(frame)

local rname, bracket = args[1], args.bracket

return p._main(args[1]rname, args.bracket) or ''

end

function p._main(rname, bracket)

Line 13 ⟶ 31:

return nil

end

bracket = bracket and "[[%s]]" or "%s"

rname = rname:match("%[%[(.+)%]%]") or rname

local target = p.getTargetString(rname)

if target then

-- Get the title object, passing the function through pcall in case we are

return bracket:format(rpage.prefixedTexttarget)

-- over the expensive function count limit, etc.

else

local success, rpage = pcall(mw.title.new, rname)

if not success or not rpage then

-- mw.title.new failed, so use the passed page name.

return bracket:format(rname)

elseif not rpage.isRedirect then

-- the page is not a redirect, so use the normalized name of the page we

-- were given.

return bracket:format(rpage.prefixedText)

end

end

function p.getTarget(page)

-- Match the redirect target text from the page content.

return getTitle(p.getTargetString)

local redirect = string.match(

end

rpage:getContent() or "",

function p.getTargetString(page)

-- Get the title object. Both page names and title objects are allowed

-- as input.

local titleObj

if type(page) == 'string' then

titleObj = getTitle(page)

elseif type(page) == 'table' and type(page.getContent) == 'function' then

titleObj = page

else

local msg = 'invalid input to "getTarget":'

.. 'the first parameter must be a string or a title object'

error(msg, 2)

end

elseifif not rpagetitleObj or not titleObj.isRedirect then

return nil

end

-- MatchFind the redirect target textby using string matching fromon the page content.

local redirecttarget = string.match(

rpagetitleObj:getContent() or "",

"^%s*#[Rr][Ee][Dd][Ii][Rr][Ee][Cc][Tt]%s*:?%s*%[%[([^%[%]]-)%]%]"

)

if redirecttarget then

-- Decode html entities and percent encodings.

redirecttarget = mw.text.decode(redirecttarget, true)

redirecttarget = mw.uri.decode(redirecttarget, 'WIKI')

return bracket:format(redirect)target

else

-- The page is a redirect, but matching failed. This indicates a bug in

-- the redirect matching pattern, so throw an error.

error(local msg = 'could not parse redirect on page [[:' .. rname .. ']]')

.. titleObj.prefixedText

.. ']]'

error(msg)

end

end

function p.main(frame)

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

return p._main(args[1], args.bracket) or ''

end