[Computercraft] turtle printer

--[[ Made by columna1 Please dont claim as your own
Version 1.1
Changelog:
1.0 release
1.1 fixed bug when 3d printing files that were not square (the turtle would not go back to the start pos)
]]--
arg = {...}
plane = 0
line = {}
x = 0
selecteditem = 1
mainmenu = true
menu2d = false
menu3d = false

col = {
w = 1,
o = 2,
m = 3,
b = 4,
y = 5,
l = 6,
p = 7,
G = 8,
g = 9,
c = 10,
P = 11,
B = 12,
n = 13,
e = 14,
r = 15,
d = 16,
s = 20
}
--functions
function forward()
    forw = true
    while forw do
        if turtle.forward() then
            forw = false
        else
            turtle.dig()
            turtle.attack()
        end
    end
end

function placeDown()
    if turtle.getItemCount(selected) > 1 then
        turtle.placeDown()
    else
        nom = true
        print("Enter material")
        while nom do
            sleep(1)
            if turtle.getItemCount(selected) > 1 then
                nom = false
                print("continuing")
                turtle.placeDown()
            end
        end
    end
end

function place()
    if turtle.getItemCount(selected) > 1 then
        turtle.place()
    else
        nom = true
        print("Enter material")
        while nom do
            sleep(1)
            if turtle.getItemCount(selected) > 1 then
                nom = false
                print("continuing")
                turtle.place()
            end
        end
    end
end

function printer()
    sleep(0.1)
    up = job.readLine()
    for j = 1,tonumber(up) do
        curline = job.readLine()
        if x == 1 then
            curline = curline:reverse()
        end
        for i = 1,#curline do
            line[i] = curline:sub(i,i)
        end
        for i = 1,#line do
            if col[line[i]] == 20 then
                --no selecting
            else
                turtle.select(col[line[i]])
                selected = col[line[i]]
            end
            if plane == 0 then
                if col[line[i]] == 20 then
                    --no placing
                else
                    placeDown()
                end
                forward()
            else
                if x == 0 then
                    if col[line[i]] == 20 then
                        --no placing
                    else
                        place()
                    end
                    turtle.turnRight()
                    forward()
                    turtle.turnLeft()
                elseif x == 1 then
                    if col[line[i]] == 20 then
                        --no placing
                    else
                        place()
                    end
                    turtle.turnLeft()
                    forward()
                    turtle.turnRight()
                end
            end
        end
        if plane == 0 then
            if x == 0 then
                turtle.turnRight()
                forward()
                turtle.turnRight()
                forward()
                x = 1
            elseif x == 1 then
                turtle.turnLeft()
                forward()
                turtle.turnLeft()
                forward()
                x = 0
            end
        else
            if x == 0 then
                turtle.down()
                turtle.turnLeft()
                forward()
                turtle.turnRight()
                x = 1
            elseif x == 1 then
                turtle.down()
                turtle.turnRight()
                forward()
                turtle.turnLeft()
                x = 0
            end
        end
    end
end
function exit()
main = false
term.clear()
term.setCursorPos(1,1)
print("Thanks for using Columna1's printer")
end

function face()
plane = 1
end
function d3()
  sleep(0.1)
  selecteditem = 1
  menu3d = true
  while menu3d do
    term.clear()
    term.setCursorPos(1,1)
    printmenu(menu3)
    event,key = os.pullEvent("key")
    onkeypress(key,menu3)
  end
end
function d2()
  selecteditem = 1
  menu2d = true
  while menu2d do
    term.clear()
    term.setCursorPos(1,1)
    printmenu(menu2)
    event,key = os.pullEvent("key")
    onkeypress(key,menu2)
  end
end
function exit3d()
  selecteditem = 1
  menu3d = false
  selecteditem = 1
end
function exit2d()
  selecteditem = 1
  menu2d = false
  selecteditem = 1
end
function print3d()
    sleep(0.1)
    x = 0
    if tip then
        files = job.readLine()
        job.close()
        for k = 1,tonumber(files) do
            job = fs.open(timp.."_"..k,"r")
            printer()
            if up %2 == 0 then
                turtle.turnLeft()
                for h = 1,up do
                    forward()
                end
                turtle.turnRight()
                turtle.up()
            else
                turtle.turnRight()
                for h = 1,up do
                    forward()
                    end
                turtle.turnLeft()
                for h = 1,#curline-1 do
                    forward()
                end
                turtle.turnLeft()
                turtle.turnLeft()
                turtle.up()
            end
            job.close()
            x = 0
            tip = nil
        end
    else
        print("No file Entered")
        sleep(1)
    end
end
function print2d()
    x = 0
    if tipe then
        printer()
        tipe = nil
    else
        print("No file entered")
        sleep(1)
    end
end
function enter3d()
    print("Enter file prefix")
    timp = read()
    if fs.exists(timp) then
        job = fs.open(timp,"r")
        tip = job.readLine()
        if tip == "3d" then
            -- over with
        else
            print("Not a 3d file")
            sleep(1)
        end
    else
        print("invalid file")
        tip = nil
        sleep(1)
    end
end
function enter2d()
    print("Enter filename")
    local temp = read()
    if fs.exists(temp) then
        job = fs.open(temp,"r")
        tipe = job.readLine()
        if tipe == "2d" then
          --another comment to do nothing
        else
            print("Not a 2d file")
            sleep(1)
        end
    else
        print("invalid file")
        tipe = nil
        sleep(1)
    end
end

menu = {
[1] = {text = "2D",handler = d2},
[2] = {text = "3D",handler = d3},
[3] = {text = "Exit",handler = exit}
}
menu2 = {
[1] = {text = "Enter filename",handler = enter2d},
[2] = {text = "Print",handler = print2d},
[3] = {text = "Plane y",handler = face},
[4] = {text = "Main menu",handler = exit2d}
}
menu3 = {
[1] = {text = "Enter filename",handler = enter3d},
[2] = {text = "Print",handler = print3d},
[3] = {text = "Main menu",handler = exit3d}
}
--printmenu
function printmenu(menu)
  for i = 1,#menu do
    if i == selecteditem then
      print("[[ "..menu[i].text.." ]]")
    else
      print("   "..menu[i].text.."   ")
    end
  end
end
--handlers
function onkeypress(key,menu)
  if key == keys.enter then
    onitemselected(menu)
  elseif key == keys.up then
    if selecteditem > 1 then
      selecteditem = selecteditem - 1
    end
  elseif key == keys.down then
    if selecteditem < #menu then
      selecteditem = selecteditem + 1
    end
  end
end
function onitemselected(menu)
  menu[selecteditem].handler()
end
--main
function main()
  while main do
    term.clear()
    term.setCursorPos(1,1)
    printmenu(menu)
    event,key = os.pullEvent()
    onkeypress(key,menu)
  end
end
main()