librev example program

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if not librev then
  os.loadAPI(shell.getRunningProgram().."/../librev")
end

local function pullItemEvent()
  while true do
    local ev, token, count = os.pullEvent()
    if ev == "isort_item" then
      return token, count
    end
  end
end

while not librev.hasKey() do
  while true do
    print("The key for token reversal is not found.")
    print("To calibrate, insert a cobblestone block.")
    librev.calibrate(pullItemEvent(), 4, 0)
    print("To confirm, insert a dirt block.")
    local id, data = librev.decodeToken(pullItemEvent())
    if id ~= 3 or data ~= 0 then
      print("Calibration failed. Retrying.")
      print("")
      librev.clearKey()
    else
      print("Calibration successful.")
      break
    end
  end
end

while true do
  print("Insert an item to identify it!")
  local id, data = librev.decodeToken(pullItemEvent())
  print("ID  : "..id)
  print("Data: "..data)
end