2DMine

local length = 10 -- x
local width = 10 -- y
local chestName = "enderstorage:ender_storage"
--"enderstorage:ender_storage"
local slotCount = 16

--Sets the dimensions for the Mining Area from command line arguments
-- Default size is listed above
function SetDimensions(...)
    local args = {...}
    if(#args == 2) then
        length = tonumber(args[1])
        width = tonumber(args[2])
    else
        print("Malformed input given, please input using the format: 'Command' 'x' 'y' ")
        print("Defaulting to 10x10x3")
    end
end

SetDimensions(...)

--Checks fuel level and refules if fuel level is less than 10
--refuels by checking each slot for fuel
function CheckFuel()
    if(turtle.getFuelLevel() < 10) then
        for slot = 1, slotCount do
            print("Attempting to refuel on slot " .. slot)
            turtle.select(slot)
            if(turtle.refuel(1)) then
                return true
             end
        end
        return false
    end
    return true
end

--Checks each inv slot for enderchest
--returns ender chest slot number
function GetEnderIndex()
    print("Searching for chest")
    for slot = 1, slotCount do
        local item = turtle.getItemDetail(slot)
        if(item ~= nil) then
            if(item["name"] == chestName) then
                return slot
            end
        end
    end
    return nil
end

--Checks if all inventory slots are full
--if full returns true
function InvFullCheck()
    print("Checking if Inventory Full")
    local sum = 0
    for slot = 1, slotCount do
        if(turtle.getItemCount(slot) > 0) then
            sum = sum + 1
        end
    end
    if (sum == slotCount) then
        return true
    end
    return false
end

--Dumps all items but coal into an enderchest its carrying
function DumpItems()
    print("Attempting to dump items")
    turtle.select(GetEnderIndex())
    turtle.digUp()
    turtle.placeUp()
    print("Dumping Items")
    for slot = 1, slotCount do
        if(turtle.getItemDetail(slot) ~= nil) then
            local item = turtle.getItemDetail(slot)

            if(item["name"] ~= "minecraft:coal") then
                turtle.select(slot)
                turtle.dropUp()
            end
        end
    end
    turtle.digUp()
end

--For cases of gravel
function DetectAndDig()
    while(turtle.detect()) do
        turtle.dig()
    end
end

function Forward()
    DetectAndDig()
    turtle.forward()
    turtle.digUp()
    turtle.digDown()
end

function turnRight()
    turtle.turnRight()
    Forward()
    turtle.turnRight()
end

function turnLeft()
    turtle.turnLeft()
    Forward()
    turtle.turnLeft()
end

function TurnAround()
    turtle.turnRight()
    turtle.turnRight()
end

--Checks to see if has ender chest and coal
function ReadyForJourney()
    return true
end

--------------Main----------------------
function Main()
if (not ReadyForJourney()) then
print("Your turtle isnt ready to journey out!")
print("Make sure your turtle has enough fuel and an enderchest!")
return
end

    for y = 1, width do                         --starting length cuts one turn off

        for x = 1, length - 1 do                    --width cuts one length down off the next
            if(not CheckFuel()) then
                print("Your turtle is out of fuel!")
                print("Powering down....")
                return
            end

            if(InvFullCheck() == true) then
                DumpItems()
            end

            Forward()


        end

        if(width - y ~= 0) then
            if(math.fmod(y, 2) == 0) then
                turnLeft()
            else
                turnRight()
            end
        else
            TurnAround()
        end

    end
end

Main()