RubberMiner

direction="left"
home=true

function sweep()
  for i = 1, 7 do
  turtle.dig()
  turtle.up()
  end
  turtle.dig()
  for i = 1, 8 do
  turtle.down()
  end
end

function rotate()
  turtle.turnRight()
  turtle.forward()
  turtle.turnLeft()
  turtle.forward()
  turtle.turnLeft()
end

function harvest()
	for i = 1, 4 do
		sweep()
		rotate()
	end
end

function dumpItems()
	for i = 1, 16 do
		turtle.select(i)
		turtle.drop()
	end
end

function toggleDirection()
	if direction=="left" then
		print("Direction set to right")
		direction="right"
	else
		print("Direction set to left")
		direction="left"
	end
end

function turn()
	if direction=="left" then
		print("turn left")
		turtle.turnLeft()
	else
		print("turn right")
		turtle.turnRight()
	end
end

function turnBack()
	if direction == "left" then
		print("turnBack right")
		turtle.turnRight()
	else
		print("turnBack left")
		turtle.turnLeft()
	end
end

function goHome()
	turn()
	turn()
	while turtle.forward() do
	end
	if direction=="left" then
		turtle.turnLeft()
		while turtle.forward() do
		end
		turtle.turnRight()
	end
	turtle.turnRight()
	turtle.forward()
	turtle.turnLeft()
	turtle.forward()
	turtle.turnLeft()
	dumpItems()
	turtle.turnLeft()
	print("Sleeping for 5min to recharge")
	sleep(300)
end

function goEdge()
	print("Going to edge of wall")
	while turtle.forward() do
	end
end

function goDown()
	print("Going down")
	while turtle.down() do
	end
end

function resume()
	goDown()
	if turtle.detect() then
		turtle.turnRight()
	end
	goEdge()
	turtle.turnRight()
	goEdge()
	while not checkStartCorner() do
		goNextCorner()
	end
	turtle.turnRight()
	turtle.forward()
	turtle.turnLeft()
	turtle.forward()
	turtle.turnLeft()
	dumpItems()
	turtle.turnLeft()
	print("Sleeping for 5min to recharge")
	sleep(300)
end

function checkStartCorner()
	print("Checking for start corner")
	turtle.up()
	if turtle.detect() then
		turtle.down()
		return true
	end
	turtle.down()
	return false
end

function goNextCorner()
	print("Going to next corner")
	turtle.turnRight()
	goEdge()
end

function nextTree()
	print("Finding next tree")
	if home then
		print("Home now")
		turtle.forward()
		home=false
		return true
	else
		turn()
		turtle.forward()
		if not turtle.forward() then
			print("Reached end of row, finding new row")
			turnBack()
			turtle.forward()
			turtle.forward()
			if turtle.detect()then
				print("Reached last row, going home")
				goHome()
				direction="left"
				home=true
				return false
			end
			turtle.down()
			turnBack()
			turtle.forward()
			turn()
			toggleDirection()
		else
			turnBack()
		end
		return true
	end
end

if not turtle.detectUp() then
	resume()
end
while true do
	print("Starting Tapping Route...")
	while nextTree() do
		harvest()
	end
end