Computercraft - Turtle - BorderArea

--EN:
--This programs fills border of specified area
--with material

--CZ:
--Tenhle program vyplni okraj zadane
--oblasti materialem

print("Info: Fuel place only in the last slot")
print("      Material place anywhere except the last slot")

--
--Input ------------------------------------------
--

local tArgs = { ... }
if #tArgs ~= 2 then
    print("Usage: BorderArea <x> <y>")
end

--
--Main variables ---------------------------------
--

local nSelected = 1
local X = tonumber(tArgs[1])
local Y = tonumber(tArgs[2])

--
--Methods ----------------------------------------
--

local function CheckForAll()
  --material
  local bCheck = true
  while bCheck do
    bCheck = false
    if turtle.getItemCount(nSelected) == 0 then
      nSelected = nSelected + 1
      turtle.select(nSelected)
      bCheck = true
    end
    if nSelected == 16 then
      bCheck = false
      nSelected = 1
      turtle.select(nSelected)
      print("Out of material, fill me Im waiting...")
      while turtle.getItemCount(1) == 0 do
        os.sleep(1)
      end
      print("Thanks!")
    end
  end

  --fuel
  if turtle.getFuelLevel() == 0 then
    turtle.select(16)
    local bFirst = true
    while turtle.refuel(1) == false do
      if bFirst then
        print("Out of fuel, waiting...")
      end
      os.sleep(1)
      bFirst = false
    end
    print("Thanks!")
    turtle.select(nSelected)
  end
end

local function BuildRowX()
  local i = 1
  while i <= X do
    CheckForAll()
    turtle.placeDown()
    if i ~= X then
      shell.run("/rom/programs/turtle/go forward")
    end
    i = i + 1
  end
end

local function BuildRowY()
  local i = 1
  while i <= Y do
    CheckForAll()
    turtle.placeDown()
    if i ~= Y then
      shell.run("/rom/programs/turtle/go forward")
    end
    i = i + 1
  end
end

--
--Code -------------------------------------------
--

turtle.select(1)

BuildRowX()
shell.run("/rom/programs/turtle/go right")

BuildRowY()
shell.run("/rom/programs/turtle/go right")

BuildRowX()
shell.run("/rom/programs/turtle/go right")

BuildRowY()
shell.run("/rom/programs/turtle/go right")

print("All done!")