Editing Module:Sandbox/Ahecht/sandbox2

local p = {}

function p.hiddenping(frame)
	local origArgs = frame:getParent().args
	local args = {}
	local maxArg = 0
	local usernames = 0
	for k, v in pairs(origArgs) do
		if type(k) == 'number' and mw.ustring.match(v,'%S') then
			if k > maxArg then maxArg = k end
			local title = mw.title.new(v)
			if title then
				args[k] = title.baseText
				usernames = usernames + 1
			elseif (frame:preprocess( "{{REVISIONID}}" ) == "") then -- Show error only in preview
				return '<div class="error"><strong>Error in [[Template:Hidden ping]]:</strong> Input contains forbidden characters.</div>'
			end
		end
	end

	if usernames < 1 then
		if (frame:preprocess( "{{REVISIONID}}" ) == "") then -- Show error only in preview
			return '<div class="error"><strong>Error in [[Template:Hidden ping]]:</strong> Username not given.</div>'
		else
			return ''
		end
	elseif usernames > (tonumber(frame.args.max) or 50) and (frame:preprocess( "{{REVISIONID}}" ) == "") then -- Show error only in preview
		return '<div class="error"><strong>Error in [[Template:Hidden ping]]:</strong> More than '..tostring(frame.args.max or 50)..' names specified.</div>'
	else
		local outStr = ''
		for i = 1, maxArg do
			if args[i] then outStr = outStr..'[[:User:'..args[i]..'|&#x200B;]]' end
		end
		return outStr
	end
end

return p