sorter

os.loadAPI("utils")


inputs = {}
default = "sortForward"


function loadFilter(filterFile)
  local result = {}
  local file = fs.open(filterFile, "r")
  if file == nil then
    return result
  end

  local item = file.readLine()
  while item ~= nil do
    if item == "DEFAULT" then
      default = filterFile
    elseif item == "INPUT" then
      table.insert(inputs, filterFile)
      -- inputs cannot be outputs
      -- so ignore any filters
      return {}
    else
      table.insert(result, item)
    end
    item = file.readLine()
  end

  file.close()

  print("Loaded "..#result.." items from "..filterFile)

  return result
end


function dropDefault()
  if default == "sortUp" then
    turtle.dropUp()
  elseif default == "sortDown" then
    turtle.dropDown()
  else
    turtle.drop()
  end
end


function sortItems()
  for i = 1,16 do
    local item = turtle.getItemDetail(i)

    if item ~= nil then
      turtle.select(i)

      if utils.itemMatchesAny(item, up) then
        turtle.dropUp()
      elseif utils.itemMatchesAny(item, down) then
        turtle.dropDown()
      elseif utils.itemMatchesAny(item, forward) then
        turtle.drop()
      else
        dropDefault()
      end
    end
  end
end


function suckItems()
  if utils.tableContains(inputs, "sortUp") then
    turtle.suckUp()
  end
  if utils.tableContains(inputs, "sortDown") then
    turtle.suckDown()
  end
  if utils.tableContains(inputs, "sortForward") then
    turtle.suck()
  end
end


up = loadFilter("sortUp")
down = loadFilter("sortDown")
forward = loadFilter("sortForward")


while true do
  suckItems()
  sortItems()

  -- schedule an event in 5 seconds
  -- to check for items
  os.startTimer(5)
  -- wait for any event, including
  -- timer or turtle_inventory
  os.pullEvent()
end