ekran.lua

local component = require "component"
local transposer = component.transposer
local sides = require "sides"
local redstone = component.redstone

local inputChest = sides.up--Chest that has the input items
local craftingChest = sides.north--Chest that has crafting items and ready to be extracted

local terrasteel = {"Manasteel Ingot", "Mana Pearl", "Mana Diamond"}

function getAmount(container, checkAmountOf)--container: side of the container ; item: label of the item
  inventory = transposer.getAllStacks(container)
  tmp = 0
  for i = 1, inventory.count() do
    if inventory[i].label == checkAmountOf then
      tmp = tmp + 1
    end
  end
return tmp
end


function amountIsValid(container, amount, item)--container: side of the inventory that we are checking the amount of ; item: label of the item

  return amount < getAmount(container, item)

end


function moveItem(source, destination, amount, item)
  sourceSlots = transposer.getAllStacks(source)

    if amountIsValid(source, amount, item) then
      return true, -1
    else
      missing = amount - getAmount(source, item)
      return false, missing
    end
end


function startCrafting()

  input = transposer.getAllStacks(inputChest)

    for i=1, 3 do
      if getAmount(input, terrasteel[i]) < 0  then
          _, missing = moveItem(inputChest, craftingChest, 1, terrasteel[i])
        print(missing .. "many "..terrasteel[i].." is missing")
        return nil
      end
    end

redstone.setOutput(sides.north, 15)
os.sleep(2)
redstone.setOutput(sides.up, 15)
print("The item is crafting...")

end

startCrafting()