local robot = require("robot")
local computer = require("computer")
local sides = require("sides")
local component = require("component")
local ser = require("serialization")

local c = component.crafting
local inventory = component.inventory_controller



local left = robot.turnLeft
local right = robot.turnRight
local TURN = robot.turnAround
local d = robot.detect
local dUp = robot.detectUp
local dDown = robot.detectDown

local side = sides.front

local size = ic.getInventorySize(side)
if not size then return nil end


print("inventory size: ", size)

local nRail_names = {}
nRail__names[1] = "minecraft:rail"
nRail__names[2] = "TConstruct:rail.wood"


local function isRail(stack_info)
  if stack_info == nil then
    return false
  end
  for index, known_rail_name in ipairs(nRail_names) do
    if stack_info.name == known_rail_name then
      return true
    end
  end
  return false
end

for slot=1,size do
  local stack_info = ic.getStackInSlot(side, slot)

  --- inspect the stack_info when it is not nil
  if isRail(stack_info) then
    print(stack_info.name, "found in slot", slot)
    ic.suckFromSlot(sides.front, slot)
  end
end

isRail(stack_info)