[CC XP Melee Turtle] XP/Cow Farm

local autoCollect = true
local active = true
local noBooks = false

local function drop()
 if turtle.getItemCount(1) >= 60 then
  turtle.select(1)
  turtle.dropUp(turtle.getItemCount(1)-1)
 elseif turtle.getItemCount(2) >= 60 then
  turtle.select(2)
  turtle.dropUp(turtle.getItemCount(2)-1)
  turtle.select(1)
 elseif turtle.getItemCount(15)>0 then
  for i = 3, 15 do
   turtle.select(i)
   turtle.dropUp()
  end
  turtle.select(1)
 end
end

local function getBook()
 turtle.select(16)
 if not turtle.suckDown() then
  turtle.dropUp()
  if not turtle.suckDown() then
   noBooks = true
  else
   noBooks = false
  end
 else
  turtle.dropDown(turtle.getItemCount(16)-1)
 end
 turtle.select(1)
end

local function init()
 drop()
 xp = peripheral.wrap("right")
 xp.setAutoCollect(autoCollect)
 getBook()
end

local function enchant()
 if xp.getLevels()>=30 and not noBooks then
  turtle.select(16)
  xp.enchant(30)
  turtle.dropUp()
  getBook()
 elseif noBooks then
  getBook()
 end
end

local function output()
 term.clear()
 term.setCursorPos(1,1)
 print("Momentaner Level: ", xp.getLevels())
 if autoCollect then
  print("")
  print("XP-Autocollecting ist aktiviert,")
  print("zum Deaktivieren [A] druecken.")
 else
  print("")
  print("XP-Autocollecting ist deaktiviert,")
  print("zum Aktivieren [A] druecken.")
 end
 if active then
  print("")
  print("Wartungsmodus ist inaktiv,")
  print("zum Aktivieren [W] druecken.")
 else
  print("")
  print("Wartungsmodus ist aktiv,")
  print("zum Deaktivieren [W] druecken.")
 end
 if noBooks then
  print("")
  print("Keine Buecher mehr")
 end

end

local function wait()
 while true do
  if active then
   turtle.attack()
   drop()
   enchant()
  end
  output()
  sleep(.2)
 end
end

local function keypress()
 while true do
  local event, key = os.pullEvent("key")
  if key == 30 then
   autoCollect = not autoCollect
   xp.setAutoCollect(autoCollect)
   output()
  elseif key == 17 then
   active = not active
   output()
  end
 end
end

init()
parallel.waitForAny(wait, keypress)