Module:Lockbox

local export = {}

-- XXX: OUTRAGEOUS ABUSE OF SCRIBUNTO API -- Generates a transclusion without incrementing the "expensive function" count local generate_transclusion do local mock_title = mw.title.new(mw.title.getCurrentTitle.id) local getContent = mock_title.getContent function generate_transclusion(title) local full_text = type(title) == 'table' and title.fullText or title rawset(mock_title, 'fullText', full_text) getContent(mock_title) end end

local function make_wikitext_warning(msg) return string.format(' Warning: %s. ', msg) end

function export.lock(frame) local warnings, transclusion_list = {}, {} -- Check if the transcluding page is cascade-protected. --	-- Only pages transcluded from a cascade-protected page appear in	-- CASCADINGSOURCES, so normally we would not be able to tell if the lockbox -- itself is cascade-protected. To work around this, we generate a	-- transclusion from the lockbox to itself, so that it will have an entry -- for itself in CASCADINGSOURCES. --	-- We cannot generate this transclusion using the title object for the -- parent title (the lockbox), as if the lockbox is transcluded on another -- page, we will generate a transclusion *from* the lockbox *to* that page -- as well, and the page will be cascade-protected. Instead we generate it -- with the title object for the current title. --	-- When the current title is the parent title (i.e. we are rendering the	-- lockbox page), this creates the required entry in the link table in the -- database. When the current title is the grandparent title or up (i.e. we	-- are rendering a page transcluding the lockbox), transclusions are only -- created from the page itself, not from the lockbox, and it is not -- cascade-protected. -- 	-- This creates an extaneous self-transclusion for all pages using the -- module, but we treat that as a necessary evil. --	-- XXX: there seems to be no way to check for cascading protection using a	-- Scribunto API, so we have to use frame:preprocess with the -- CASCADINGSOURCES parser function. do mw.title.getCurrentTitle:getContent -- Generate self-transclusion local parent_title = frame:getParent:getTitle if frame:preprocess() ==  then warnings[#warnings + 1] = make_wikitext_warning(string.format( 'the page "%s" is not cascade-protected', parent_title ))		end end

-- Generate transclusions to the templates, and build the output list. for i, item in ipairs(frame.args) do		item = mw.text.trim(item) local title = mw.title.new(item) if title then local ns = title.namespace local prefixed_text = title.prefixedText if ns == 0 then -- The item had no namespace text. If the item starts with a -- colon, assume it is a mainspace page. Otherwise, assume it is -- a template. if item:sub(1, 1) == ':' then generate_transclusion(title) table.insert(transclusion_list, '* ' .. prefixed_text .. '') else generate_transclusion('Template:' .. prefixed_text) table.insert(transclusion_list, '* Template:' .. prefixed_text .. '') end elseif ns == 6 or ns == 14 then -- File or Category namespace generate_transclusion(title) table.insert(transclusion_list, '* ' .. prefixed_text .. '') else generate_transclusion(title) table.insert(transclusion_list, '* ' .. prefixed_text .. '') end else warnings[#warnings + 1] = make_wikitext_warning(string.format( 'invalid title "%s" in argument #%d', item, i ))		end end

if frame.args.silent then return '' else -- If there were any warnings, show them at the top. Then show the list -- of transcluded pages. local ret = '' if #warnings > 0 then if #warnings > 1 then for i, warning in ipairs(warnings) do warnings[i] = '* ' .. warning end end ret = ret .. table.concat(warnings, '\n') .. '\n\n' end return ret .. table.concat(transclusion_list, '\n') end end

return export