Module:Lockbox/sandbox: Difference between revisions

Revision as of 01:16, 17 March 2017

Revision as of 02:33, 17 March 2017

Line 17:

local output = {}

-- checkCheck if the transcluding page is cascade-protected.

--

-- XXX: unfortunately there is no other way; title.protectionLevels does not report cascading protection status

-- Only pages transcluded from a cascade-protected page appear in

-- CASCADINGSOURCES, so normally we would not be able to tell if the lockbox

-- parent titleitself is cascade-protected. To work around this, makewe generate thea

-- 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 grandparentparent title or(i.e. up,we itare willrendering not bethe

-- 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

local parent_title = frame:getParent():getTitle()

-- Only pages transcluded from a cascade-protected page appear in

-- CASCADINGSOURCES, so normally we would not be able to tell if the

-- parent title is cascade-protected. To work around this, make the

-- current page transclude itself. If the current title is the parent

-- title, this will add an entry for it to CASCADINGSOURCES. If the

-- current title is the grandparent title or up, it will not be

-- cascade-protected itself as the page will not be parsed. (And that's

-- a good job, as parsing it would cause a template loop.)

mw.title.getCurrentTitle():getContent() -- Generate self-transclusion

generate_transclusion(local parent_title = frame:getParent():getTitle()

if frame:preprocess("{{CASCADINGSOURCES:" .. parent_title .. "}}") == "" then

output[#output + 1] = '<strong class="warning">Warning: the page "' .. parent_title .. '" is not cascade-protected.</strong>\n'