bloodalter.lua

-- Designed to automatically manage a blood alter.
-- v0.1 - Not finished.
-- By: ZeekDaGeek

local component = require("component")
local sides = require("sides")
local term = require("term")

local inv = component.inventory_controller
local robot = component.robot

local bloodAlter = {}
local ingredients = {}

-- Config
bloodAlter.side = sides.bottom       -- (Required) The side with the Blood Alter
ingredients.input_side = nil         -- (Optional) Input side for mass crafting
ingredients.output_side = sides.top  -- (Optional) Output side for mass crafting
ingredients.inputItem_slot = 1       -- (Required) The internal slot containing the input item for reference.
ingredients.outputItem_slot = 2      -- (Required) The internal slot containing the output item for reference.

-- Don't change these.
bloodAlter.slot = 1

-- Validate info.
function validateConfig()

  local invSize,_ = inv.getInventorySize(bloodAlter.side)

  if (type(invSize) == "nil") then

    term.clear()
    term.write("Unable to find an inventory on the Blood Alter side.")

    return false

  end
    

end

-- Attempt to process an ingredient through the Blood Alter.
function attemptAlterPush()

  local inputItem = inv.getStackInInternalSlot(ingredients.inputItem_slot)

  -- Check if there's items in input slot comparison.
  if (inputItem == nil) then

    term.clear()
    term.write(string.format("An input item should be in slot %i, none was found.", ingredients.inputItem_slot))

    return false

  end

  inputItem.slot = ingredients.inputItem_slot

  -- Check if there's extra items in the input slot, use them if available.
  if (inputItem.size > 1) then

    robot.select(inputItem.slot)
    inv.dropIntoSlot(bloodAlter.side, bloodAlter.slot, 1)

    return true

  end

  -- Check if there are any input items anywhere in the inventory.
  for i=1,16 do

    if (i ~= ingredients.inputItem_slot and i ~= ingredients.outputItem_slot) then

      local checkItem = inv.getStackInInternalSlot(i)

      if (checkItem ~= nil) then

        checkItem.slot = i

        if (inputItem.name == checkItem.name and inputItem.damage == checkItem.damage) then

          robot.select(checkItem.slot)
          inv.dropIntoSlot(bloodAlter.side, bloodAlter.slot, 1)

          return true

        end

      end

    end

  end

  return false

end

-- Attempt to pull the output item from the Blood Alter.
function attemptAlterPull()

  local outputItem = inv.getStackInInternalSlot(ingredients.outputItem_slot)

  -- Check if there's items in input slot comparison.
  if (outputItem == nil) then

    term.clear()
    term.write(string.format("An output item should be in slot %i, none was found.", ingredients.outputItem_slot))

    return false

  end

  outputItem.slot = ingredients.outputItem_slot

  local alterItem = inv.getStackInSlot(bloodAlter.side, bloodAlter.slot)

  if (alterItem == nil) then

    return false

  end

  if (alterItem.name == outputItem.name and alterItem.damage == outputItem.damage) then

    robot.select(outputItem.slot)
    inv.suckFromSlot(bloodAlter.side, bloodAlter.slot)

    return true

  end

  return false

end

-- Pull input items from the input inventory if it exists, as well as push output items if output inventory exists.
function doInputOutput()

  -- Check if an Input Inventory exists.
  --if (ingredients.input_side ~= nil)

end


while true do

  if (validateConfig() == false) then return false end

  -- Get item in Blood Alter.
  bloodAlter.item = inv.getStackInSlot(bloodAlter.side, 1)

  -- Check if the Blood Alter is empty
  -- If the slot is empty attempt to fill it.
  if (type(bloodAlter.item) == "nil") then

    attemptAlterPush()

  else

    attemptAlterPull()

  end

  os.sleep(0.5);

end