Module:Effective protection level

Documentation for this module may be created at Module:Effective protection level/doc

local p = {}

-- Returns the permission required to perform a given action on a given title.
-- If no title is specified, the title of the page being displayed is used.
function p.main(action, pagename)
	local frame = mw.getCurrentFrame()
	local title
	if type(pagename) == 'table' then
		title = pagename
		pagename = title.prefixedText
	else
		title = mw.title.new(pagename) or mw.title.getCurrentTitle()
	end
	if action ~= 'edit' and action ~= 'move' and action ~= 'create' and action ~= 'upload' then
		error( 'First parameter must be one of edit, move, create, upload', 2 )
	end
	if title.namespace == 8 then -- MediaWiki namespace
		return 'sysop'
	elseif title.namespace == 2 and ( mw.ustring.find( pagename, '/.*%.js$') or mw.ustring.find( pagename, '/.*%.css$') ) then -- user .js or .css page
		return 'sysop'
	else
		local level = frame:callParserFunction('PROTECTIONLEVEL', action, pagename)
		if level == 'sysop' then
			return 'sysop'
		elseif frame:callParserFunction('CASCADINGSOURCES', pagename) ~= '' then -- used by a cascading-protected page
			return 'sysop'
		elseif title.namespace == 6 and action == 'move' then -- Special permission is required to move files. Note this breaks the hierarchy, because both templateeditor and filemover are required to move template-protected files. This isn't a real concern currently, since template protection shouldn't be applied to files.
			return 'filemover'
		elseif level ~= '' then
			return level
		-- If we get this far, the page is unprotected. Figure out what group is needed to perform the action they're trying to do normally, and return that.
		elseif action == 'upload' or action == 'move' then
			return 'autoconfirmed'
		elseif action == 'create' and title.namespace % 2 == 0 and title.namespace ~= 118 then -- You need to be registered, but not autoconfirmed, to create non-talk pages other than drafts
			return 'user'
		else
			return '*'
		end
	end
end

-- Make this usable from wikitext rather than just other lua modules
function p.p(frame)
	local parent = frame:getParent()
	return p.main(parent.args.action or parent.args[1], parent.args.title or parent.args[2])
end

return p