Minecraft - Item Recharger Using Interactive Sorter

--2013 Ichabod_Clay (Ichabod2032)
--Item charger script for Minecraft.
--This script uses an Interactive Sorter to take an item (ideally from an ender chest)
-- and send it off to charge in a charging station (batbox, MFE, MFSU).
--The way I have it set up is the Sorter scans the chest every so often and, if the
-- proper item is found, takes the item and sends it to a charge station through a
-- Buildcraft pipe.
--The return trip is handled by an Autarchic AND Gate that is set to extract the item
-- from the charge station once it is full. Set 1 setting to energy pulse when an item is
-- in inventory, and the other setting set to energy pulse when charging a fully charged
-- item. Easy Peasy!

tArgs = {...};
if #tArgs ~= 1 then
  print("Usage: <name of program> <side sorter is attached to>");
  return;
end

local sorter = peripheral.wrap(tArgs[1]);

--This is the ID of the Advanced Jetpack.
--Theoretically, you could change it to whatever you need to have charged.
local jetpackID = 30481;

--03/26/13
--Found that wiki page was incorrect on east and west values. Switched them.
--Tested on SSP and SMP worlds with CraftOS 1.5, unsure of the
-- interactive sorter's mod version.
local direction =
{
  down  = 0,
  up    = 1,
  north = 2,
  south = 3,
  west  = 4,
  east  = 5
}

--Helper function to find the actual item ID and
-- meta value from a UUID.
local function getID(uuid)
  id = 0;
  meta = 0;

  if uuid > 32768 then
    id = uuid % 32768;
    meta = (uuid - id) / 32768;
  else
    id = uuid;
    meta = 0;
  end

  return id, meta;
end

--Simple helper function. Returns true and uuid of item if found,
-- false otherwise.
local function findJetpack(direction)
  local inventory = sorter.list(direction);
  for uuid, count in pairs(inventory) do
    local id, meta = getID(uuid);
    if (id == jetpackID) and (meta ~= 1) then
      return true, uuid;
    end
  end
  return false;
end

--Make sure to fill in the required parameters before using!
--The sorter's 'extract' function has the following parameters:
-- sorter.extract(from, uuid, to, amount)
--Find the 'from' and 'to' direction values from the table provided
-- at the beginning of this script.

--Main loop start! WOO!
while true do
  local jetpackFound, uuid = findJetpack("Fill Me In!");
  if jetpackFound then
    sorter.extract("Fill me in!", uuid, "Fill me in!", 1);
    print("Day: "..os.day().." Time: "..os.time());
    print("Item sent to charge");
  end
  sleep(10);
end