Module:Delink

-- This module de-links most wikitext.

p =

local function delinkReversePipeTrick(s)

if mw.ustring.match(s, "^%%|.*\n") then -- Check for newlines or multiple pipes.

return s

else

return mw.ustring.match(s, "%%(.*)%%")

end

end

local function delinkPipeTrick(s)

local linkarea, display = "", ""

-- We need to deal with colons, brackets, and commas, per Help:Pipe trick.

-- First, remove the text before the first colon, if any.

if mw.ustring.match(s, ":") then

s = mw.ustring.match(s, "%%%%")

-- If there are no colons, grab all of the text apart from the square brackets and the pipe.

else

s = mw.ustring.match(s, "%%%%")

end

-- Next up, brackets and commas.

if mw.ustring.match(s, "%(.-%)$") then -- Brackets trump commas.

s = mw.ustring.match(s, "(.-) ?%(.-%)$")

elseif mw.ustring.match(s, ",") then -- If there are no brackets, display only the text before the first comma.

s = mw.ustring.match(s, "(.-),.*$")

end

return s

end

local function delinkWikilink(s)

local result = s

-- Deal with the reverse pipe trick.

if mw.ustring.match(result, "%%|") then

return delinkReversePipeTrick(result)

end

result = mw.uri.decode(result, "PATH") -- decode percent-encoded entities. Leave underscores and plus signs.

result = mw.text.decode(result, true) -- decode HTML entities.

-- Check for bad titles. To do this we need to find the

-- title area of the link, i.e. the part before any pipes.

local titlearea

if mw.ustring.match(result, "|") then -- Find if we're dealing with a piped link.

titlearea = mw.ustring.match(result, "^%%.*%%")

else

titlearea = mw.ustring.match(result, "^%%(.-)%%")

end

-- Check for bad characters.

if mw.ustring.match(titlearea, "%%%%%c\n") then

return s

end

-- Check for categories, interwikis, and files.

local colonprefix = mw.ustring.match(result, "%%(.-):.*%%") or "" -- Get the text before the first colon.

if mw.language.isKnownLanguageTag(colonprefix)

or mw.ustring.match(colonprefix, "^Ccategory$")

or mw.ustring.match(colonprefix, "^Ffile$")

or mw.ustring.match(colonprefix, "^Iimage$") then

return ""

end

-- Remove the colon if the link is using the Help:Colon trick.

if mw.ustring.match(result, "%%:") then

result = "" .. mw.ustring.match(result, "%%:(.*%%)")

end

-- Deal with links using the Help:Pipe trick.

if mw.ustring.match(result, "^%%%%") then

return delinkPipeTrick(result)

end

-- Find the display area of the wikilink

if mw.ustring.match(result, "|") then -- Find if we're dealing with a piped link.

result = mw.ustring.match(result, "^%%(.+)%%")

-- Remove new lines from the display of multiline piped links,

-- where the pipe is before the first new line.

result = mw.ustring.gsub(result, "\n", "")

else

result = mw.ustring.match(result, "^%%(.-)%%")

end

return result

end

local function delinkURL(s)

-- Assume we have already delinked internal wikilinks, and that

-- we have been passed some text between two square brackets foo.

-- If the text contains a line break it is not formatted as a URL, regardless of other content.

if mw.ustring.match(s, "\n") then

return s

end

-- Check if the text has a valid URL prefix and at least one valid URL character.

local validurlprefixes = {"//", "http://", "https://", "ftp://", "gopher://", "mailto:", "news:", "irc://"}

local url_prefix

for i,v in ipairs(validurlprefixes) do

if mw.ustring.match(s, '^%' .. v ..'^"%s.*%' ) then

url_prefix = v

break

end

end

-- Get display text

if not url_prefix then

return s

end

s = mw.ustring.match(s, "^%" .. url_prefix .. "(.*)%") -- Grab all of the text after the URL prefix and before the final square bracket.

s = mw.ustring.match(s, '^.-(" .*)') or "" -- Grab all of the text after the first URL separator character (" ).

s = mw.ustring.match(s, "^%s(%S.)$") or "" -- If the separating character was a space, trim it off.

s_decoded = mw.text.decode(s, true)

if mw.ustring.match(s_decoded, "%c") then

return s

else

return s_decoded

end

end

local function delinkLinkClass(s, pattern, delinkFunction)

if not type(s) == "string" then

error("Attempt to de-link non-string input.", 2)

end

if not ( type(pattern) == "string" and mw.ustring.sub(pattern, 1, 1) == "^" ) then

error('Invalid pattern detected. Patterns must begin with "^".', 2)

end

-- Iterate over the text string, and replace any matched text. using the

-- delink function. We need to iterate character by character rather

-- than just use gsub, otherwise nested links aren't detected properly.

local result = ""

while mw.ustring.len(s) > 0 do

-- Replace text using one iteration of gsub.

s = mw.ustring.gsub(s, pattern, delinkFunction, 1)

-- Append the left-most character to the result string.

result = result .. mw.ustring.sub(s, 1, 1)

s = mw.ustring.sub(s, 2, -1)

end

return result

end

local function _delink(args)

local text = args1 or ""

if args.refs == "yes" then

-- Remove any Help:Strip markers representing ref tags. In most situations

-- this is not a good idea - only use it if you know what you are doing!

text = mw.ustring.gsub(text, "UNIQ%w%-ref%-%d%-QINU", "")

end

if not (args.comments == "no") then

text = mw.ustring.gsub(text, "", "") -- Remove html comments.

end

if not (args.wikilinks == "no") then

text = delinkLinkClass(text, "^%%.-%%", delinkWikilink) -- De-link wikilinks.

end

if not (args.urls == "no") then

text = delinkLinkClass(text, "^%.-%", delinkURL) -- De-link URLs.

end

if not (args.whitespace == "no") then

-- Replace single new lines with a single space, but leave double new lines

-- and new lines only containing spaces or tabs before a second new line.

text = mw.ustring.gsub(text, "(^\n \t \t)\n( \t^\n \t)", "%1 %2")

text = mw.ustring.gsub(text, " \t+", " ") -- Remove extra tabs and spaces.

end

return text

end

function p.delink(frame)

local args

if frame == mw.getCurrentFrame then

-- We're being called via #invoke. If the invoking template passed any args, use

-- them. Otherwise, use the args that were passed into the template.

args = frame:getParent.args

for k, v in pairs(frame.args) do

args = frame.args

break

end

else

-- We're being called from another module or from the debug console, so assume

-- the args are passed in directly.

args = frame

end

return _delink(args)

end

return p