App

-- https://turtleappstore.com/u/alexoneill/a/farm_v1
-- Farm v1
-- alexoneill

os.loadAPI('hare')

LENGTH = 29
WIDTH = 19

FUELS = {
  ['minecraft:coal'] = 1;
  ['minecraft:charcoal'] = 1;
}

CROP_SEEDS = {
  ["farmersdelight:cabbages"] = "farmersdelight:cabbage_seeds";
  ["farmersdelight:onions"] = "farmersdelight:onion";
  ["minecraft:carrots"] = "minecraft:carrot";
  ["minecraft:potatoes"] = "minecraft:potato";
  ["minecraft:wheat"] = "minecraft:wheat_seeds";
  ["minecraft:beetroots"] = "minecraft:beetroot_seeds";
}

CROP_GROWTH = {
  ["farmersdelight:cabbages"] = 7;
  ["farmersdelight:onions"] = 7;
  ["farmersdelight:rice_panicles"] = 3;
  ["minecraft:carrots"] = 7;
  ["minecraft:potatoes"] = 7;
  ["minecraft:wheat"] = 7;
  ["minecraft:beetroots"] = 3;
}

DEPOSIT = {
  "farmersdelight:cabbage";
  "farmersdelight:cabbage_seeds";
  "farmersdelight:onion";
  "farmersdelight:rice_panicle";
  "minecraft:beetroot";
  "minecraft:beetroot_seeds";
  "minecraft:carrot";
  "minecraft:poisonous_potato";
  "minecraft:potato";
  "minecraft:wheat";
  "minecraft:wheat_seeds";
}

function move (dx, dy)
  -- Get either true (positive) or false (negative)
  local dx_dir = (dx ^ 0) > 0
  local dy_dir = (dy ^ 0) > 0

  -- First y
  if not dy_dir then
    turtle.turnRight()
    turtle.turnRight()
  end

  for i=1,math.abs(dy) do
    turtle.forward()
  end

  -- Then x (XOR dirs)
  if dx_dir == dy_dir then
    turtle.turnRight()
  else
    turtle.turnLeft()
  end

  for i=1,math.abs(dx) do
    turtle.forward()
  end
end

function refuel ()
  if turtle.getFuelLevel() >= 80 then
    return true
  end

  -- Find a supported fuel.
  for fuel, count in pairs(FUELS) do
    if hare.selectItem(fuel) then
      return turtle.refuel(count)
    end
  end

  -- No eligible fuels.
  return false
end

function dropCrops ()
  for _, item in pairs(DEPOSIT) do
    while hare.selectItem(item) do
      turtle.dropDown()
    end
  end
end

function sweepCb ()
  -- Refuel as needed.
  if not refuel() then
    print('Need fuel!')
    return
  end

  -- Inspect crop.
  local res, crop = turtle.inspectDown()
  if not res or crop == nil then
    print('ignore: failed')
    return
  end

  -- If the crop is actually a chest, take a moment to deposit everything.
  local name = crop['name']
  if name == 'quark:oak_chest' then
    print('drop: crops')
    dropCrops()
    return
  end

  -- If the crop is not recognized, skip it.
  local growth = CROP_GROWTH[name]
  if growth == nil then
    print('ignore: uknown')
    return
  end

  -- Skip if the crop is not ripe.
  if crop['state']['age'] ~= growth then
    print('ignore: not grown: age=' .. crop['state']['age'] .. ', target=' .. growth)
    return
  end

  -- Harvest!
  print('harvest: ' .. name)
  turtle.digDown()

  -- If the crop is not plantable, skip planting.
  local seeds = CROP_SEEDS[name]
  if seeds == nil then
    print('no re-plant: ' .. name)
    return
  end

  -- This should almost always work as there are seeds dropped as
  -- part of the harvest action.
  if not hare.selectItem(seeds) then
    print('no re-plant: out of: ' .. seeds)
    return
  end

  -- Plant!
  print('plant: ' .. seeds)
  turtle.placeDown()
end

function main ()
  -- Get some initial fuel, one coal should be enough.
  if not refuel() then
    print('Need fuel!')
    return
  end

  -- Drop any current crops into the chest
  dropCrops()

  -- Go to bottom right of field, look down the field.
  move(-9, -9)
  turtle.turnRight()

  -- Go over the field.
  hare.sweepField(LENGTH, WIDTH, sweepCb)

  -- Return home, drop contents.
  move(9, 9)
  dropCrops()
  turtle.turnRight()
end

-- Main loop
while true do
  main()

  -- 10m between loops.
  os.sleep(600)
end