Go Program (Turtle)

local tArgs = { ... }
local direction = tArgs[1]
local times = tonumber(tArgs[2])

if not turtle then
    error("You need a turtle!")
end

if times == nil then
  times = 1
end

local possibleDirections = {"left","right","up","down","forward","back"}
local translateDirection = {"turnLeft","turnRight","up","down","forward","back"}

if #tArgs < 1 then
  print("Usage:")
  print(shell.getRunningProgram().." <direction> (times)")
  print("Parameters:")
  print("<> = required")
  print("() = optional")
  return false
end

local function go(aDirection,aTimes,detect)
  print("Going "..direction.." for "..times.." blocks")
    if detect == nil then
        local detect = "detectUp"
        for i=1,aTimes do
            turtle[aDirection]()
        end

    elseif detect ~= nil then
        for i=1,aTimes do
            if turtle[detect]() == false then
                turtle[aDirection]()
            else
                print("Something in the way!")
                return false
            end
        end
    end
end

for i=1,#possibleDirections do
  if direction == possibleDirections[i] then
    if direction == "forward" then detectIt = "detect"
    elseif direction == "up" then detectIt = "detectUp"
    elseif direction == "down" then detectIt = "detectDown"
    else detectIt = nil
    end
    if go(translateDirection[i],times,detectIt) == true then
        return true
    else
        return false
    end
  end
end

print("Invalid Direction")
print("Possible Directions:")
for i=1,#possibleDirections do
    print(possibleDirections[i])
end
return false