Module:Redirect: Difference between revisions

Line 9:

function p.main(frame)

args=frame.args

local args, pargs = frame.args, (frame:getParent() or {}).args or {}

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

parent=frame.getParent(frame)

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if parent then pargs = parent.args else pargs={} end

if not rname or not mw.ustring.match(rname, "%S") then return "" end

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local rname=args[1] or pargs[1] or ""

~~local~~ bracket=~~args.~~bracket or ~~pargs.bracket~~

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

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rname = mw.ustring.match(rname,"%[%[(.+)%]%]") or rname

local bb = "";local be= "" -- store brackets if restoring to an output if bracket option is set

if ~~rname then~~

if mw.~~ustring~~.~~gsub~~(rname~~,"%s",""~~) ~~== "" then return "" end~~

local rpage, err = mw.title.new(rname)

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~~if bracket~~ then

-- avoid expensive operation when nothing to do

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~~local strip=~~mw.ustring.match(rname,"%[%[(.+)%]%]")

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if not rpage then

if strip then rname=strip;bb="[[";be="]]" end

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err = "File not found (mw.title.new failed)"

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end

~~else~~ ~~return ""~~

elseif rpage.id == 0 then

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err = "File not found (id=0):"

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~~end~~

~~local~~ rpage~~=mw~~.~~title.new(rname)~~

elseif not rpage.isRedirect then

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return mw.ustring.format(bracket, rname) -- not a redirect so use passed page name (for some general-purpose template use)

local err=""

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else

if rpage then -- avoid possibly expensive FileExists if we don't have anything

local redirect = mw.ustring.match( rpage:getContent() or "", "^#[Rr][Ee][Dd][Ii][Rr][Ee][Cc][Tt]%s*%[%[(.-)%]%]" )

if rpage.id ~= 0 then

-- ~~if rpage.fileExists then~~

if ~~rpage.isRedirect~~ then

if redirect then

return mw.ustring.format(bracket, redirect)

return (bb.. tostring(mw.ustring.match(tostring(rpage.getContent(rpage)),"[Rr][Ee][Dd][Ii][Rr][Ee][Cc][Tt].-%[%[(.-)%]%]")..be) or [=[[[Module:redirect]] error: failed to understand - [[]=] .. rname .. [=[]]</span]=])

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end

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~~else return~~ rname -- not a redirect so ~~leave~~ ~~the~~ ~~original~~ ~~text~~ (for some general-purpose template use)

~~end~~

-- ~~else~~ ~~err=~~"~~File does not~~ ~~exist:~~ "

err = "failed to understand"

-- end

end

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~~else~~ err="File not found (id=0):"

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return '[[Module:redirect]] error: ' .. err .. ' - [[' .. rname .. ']]'

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~~end~~

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~~else~~ err="File not found (mw.title.new failed)"

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~~end~~

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return ~~[=[~~[[Module:redirect]] error: ~~]=]~~ .. err .. ~~[=[~~ - [[~~]=]~~ .. rname .. ~~[=[~~]]~~]=]~~

end