biolock door code

local authorized = {}
local authorizing
local close

local handle = io.open(".auth", "r")
if handle then
  for user in handle:lines() do
    authorized[user] = true
  end
  handle:close()
end

while true do
  event = {os.pullEvent()}
  if event[1] == "biolock" then
    if authorized[event[2]] then
      if rs.getOutput("right") then
        --accept new authorized entry
        authorizing = true
      else
        rs.setOutput("right", true)
        close = os.startTimer(20)
      end
    elseif authorizing then
      authorized[event[2]] = true
      authorizing = false
      local handle = io.open(".auth", "w")
      if handle then
        for k, v in pairs(authorized) do
          handle:write(k.."\n")
        end
        handle:close()
      end
    end
  elseif event[1] == "redstone" then
    if rs.getInput("bottom") then
      authorizing = false
      rs.setOutput("right", false)
    end
  elseif event[1] == "timer" and event[2] == close then
    authorizing = false
    rs.setOutput("right", false)
  end
end