Liktorn's Mining Turtle Check Chest

-- Program:
--   startup
-- Original Program by Direwolf20
-- Modified by Kzorith
-- Description:
--   Controls the operation of the Uberminer
-- Hardware Requirement:
--   1 Advanced Mining Turtle
--   1 Chest

-- Initialization
--  set this to whatever side the chest is on
c = peripheral.wrap("front")

--  loop forever doing the following
while true do
   --  set a counter to indicate what slot in the chest we are looking at
   i = 2
   --  while the turtle is low on fuel
   while turtle.getFuelLevel() < 200 do
      --  look in a particular slot in the chest
      --  first time through it'll be the second slot
      --  if there is an item in that slot...
      if c.getStackInSlot(i) then
         --  pull it into the turtle
         --  "south" is the direction that the turtle is from the chest
         --  'i' is the slot in the chest to take from
         --  '64' is the maximum number to take
         --  '16' is the slot in the turtle to put the items
         c.pushItem("south",i,64,16)
         --  set the turtle to look at slot 16
         turtle.select(16)
         --  try to use what's in that slot to refuel
         turtle.refuel()
         --  if there are still items in the slot, it wasn't suitable for refueling
         if turtle.getItemCount(16) > 0 then
            --  put the item back where you got it
            --  "south" is the direction the turtle is from the chest
            --  '16' is the slot on the turtle to take from
            --  '64' is the maximum amount to take
            --  'i' is the slot in the chest in which to put the items
            c.pullItem("south",16,64,i)
         end -- if getItemCount
         --  set the turtle to look at slot 1
         turtle.select(1)
      end -- if getStackInSlot
      --  move to the next slot in the chest
      i = i + 1
      --  if we've moved beyond the last slot...
      if i > 27 then
      --  print that the turtle can't refuel
         print("No fuel available for refueling.")
         -- exit the while getFuelLevel loop
         break
      end -- if i > 27
   end -- while getFuelLevel

   --  print what we are doing
   print("Checking for item in chest")
   --  if there is an item in slot 1
   --  note we don't care about any other slot other than slot 1
   if c.getStackInSlot(1) then
      --  print what we are doing
      print("  Item Present: Mining")
      --  execute the mine program
      shell.run("mine2")
   --  otherwise
   else
      --  print what we are doing
      print("  Item Missing: Waiting")
      -- wait 5 seconds
      sleep(5)
   end -- if getStackInSlot
end -- while true