Quarry

local function askDimensions()
    print("length:")
    Length = tonumber(read())

    print("width:")
    Width = tonumber(read())

    print("height:")
    Height = tonumber(read())
end

local function fuel()
    turtle.select(15)

    if turtle.getItemDetail then
        local item = turtle.getItemDetail()

        while true do
            if item ~= nil and item.name == "minecraft:coal" or item.name == "minecraft:coal_block" then
                turtle.refuel()
                break
            else
                print("no coal or coal blocks in second to last slot!")
                sleep(5)
            end
        end
    else
        print("no coal or coal blocks in second to last slot!")
        sleep(5)
    end
end

local function checkFuel()
    while turtle.getFuelLevel() < Length * Height * Width * 5 do
        print("not enough fuel")
        sleep(2)
        fuel()
    end
end

local function checkForChests()
    -- checking if the turtle has a chest in the last slot
    turtle.select(16)
    while true do
        if turtle.getItemDetail() then
            local item = turtle.getItemDetail()

            while item.name ~= "minecraft:chest" or item.count < 64 do
                print("vanilla chest needed in last slot!")
                sleep(5)
            end

            break
        else
            print("vanilla chest needed in last slot!")
            sleep(5)
        end
    end
end

local function initialize()
    askDimensions()

    checkFuel()

    checkForChests()
end

local function chestDump()
    -- chest must be placed in 16th slot
    turtle.select(16)
    turtle.placeDown()


    for i = 1, 15, 1 do
        turtle.select(i)
        turtle.dropDown()
    end
end

local function checkForInventorySpace()
    local dumpNeeded = true

    for i = 1, 15, 1 do
        if dumpNeeded == false then
            break
        end

        turtle.select(i)

        if (turtle.getItemDetail()) then
            dumpNeeded = false
        end
    end

    if dumpNeeded then
        chestDump()
    end
end

local function digLayer()
    -- mine the whole area
    for z = 0, Width, 1 do
        for x = 0, Length, 1 do
            print("mining layer")
        end
    end
end

local function moveDownLayer()
    -- check block below, if not air, water or lava mine, move down
    print("going down one layer")
end

local function dig()
    for layer = 0, Height, 1 do
        digLayer()

        if layer < Height - 1 then
            moveDownLayer()
        end
    end
end

local function main()
    initialize()
    dig()

    print("done")
end

main()