Modulis: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)
		rawset(mock_title, 'fullText', title)
		getContent(mock_title)
	end
	-- I can do the same thing without rawset.
end

function export.lock(frame)
	local output = {}
	
	-- check if the current page is cascade-protected
	-- XXX: unfortunately there is no other way; title.protectionLevels does not report cascading protection status
	mw.title.getCurrentTitle():getContent() -- self-transclude; see [[mw:Extension:Scribunto/Lua reference manual#Title objects]]
	if frame:preprocess "{{CASCADINGSOURCES}}" == "" then
		output[#output + 1] = '<strong class="warning">Warning: this page (' .. mw.title.getCurrentTitle().fullText .. ') is not cascade-protected.</strong>\n'
	end
	
	local match = string.match

	for _, item in ipairs(frame.args) do
		item = mw.text.trim(item)
		
		local ns, rest = match(item, "^(.-):(.*)")
		if not ns or not mw.site.namespaces[ns] then
			generate_transclusion('Template:' .. item)
			output[#output + 1] = '* [[Template:' .. item .. ']]\n'
		elseif (ns == "File") or (ns == "Image") then
			generate_transclusion(item)
			output[#output + 1] = '* [[:' .. item .. ']]\n'
		elseif ns == "Category" then
			generate_transclusion(item)
			output[#output + 1] = '* [[:' .. item .. ']]\n'
		elseif rest ~= '' then
			generate_transclusion(item)
			output[#output + 1] = '* [[' .. item .. ']]\n'
		end
	end

	if frame.args.silent then
		return ""
	else
		return table.concat(output)
	end
end

return export