Module:Freeze

local p = {}

function p.main(frame)
	local parent = frame:getParent()
	local curTitle = mw.title.getCurrentTitle()
	local page = parent.args[1]
	local text = parent.args[2]

	page = page ~= nil and mw.text.trim(page) or ''
	if page == '' or string.sub(page, 1, 1) == '#' then
		page = curTitle.subjectPageTitle.prefixedText .. page
	end

	if text == nil then
		text = page .. ' (as of now)'
	end

	local title = mw.title.new(page)
	if mw.title.equals(title, curTitle) then
		local revTimestamp = frame:callParserFunction('REVISIONTIMESTAMP', title.prefixedText)
		if mw.isSubsting() then
			return string.format('{{#invoke:Freeze/same page link|main|%s|2=%s}}', revTimestamp, text)
		else
			local samePageLink = require('Module:Freeze/same page link')
			return samePageLink._main(title.prefixedText, revTimestamp, text)
		end
	else
		local revId = frame:callParserFunction('REVISIONID', title.prefixedText)
		if revId == '' then
			return string.format('<strong class="error">Unable to get latest revision ID for "%s".</strong>', title.prefixedText)
		end
		if mw.isSubsting() then
			return string.format('{{oldid|1=%s|2=%s|3=%s}}<!-- Template:Freeze -->', title.fullText, revId, text)
		else
			return frame:expandTemplate{title='oldid', args={title.fullText, revId, text}}
		end
	end
end

return p