stripminer

TRAVEL_DIST = 64

function EatFuel()
    for i = 1,16,1 do
        local data = turtle.getItemDetail(i)
        if data then
            if data.name == "minecraft:coal" then
                turtle.select(i)
                turtle.refuel(1)
                return true
            end
        end
    end
    return false
end

function CanGetHome(dist)
    local fuelLevel = turtle.getFuelLevel()
    if fuelLevel-1 <= dist then
        local res = EatFuel()
        return res
    end
    return true
end

function ManageInventory()
    AllowedItemsTable = {
        ["minecraft:diamond"] = true,
        ["minecraft:emerald"] = true,
        ["minecraft:redstone"] = true,
        ["minecraft:lapiz"] = true,
        ["minecraft:coal"] = true,
        ["minecraft:iron_ore"] = true,
        ["galacticraftcore:basic_item"] = true,
        ["galacticraftcore:basic_block_core"] = true,
        ["minecraft:dye"] = true
    }
    for i = 1,16,1 do
        local data = turtle.getItemDetail(i)
        if data then
            if AllowedItemsTable[data.name] == nil then
                turtle.select(i)
                turtle.drop()
            end
        end
    end

    turtle.select(1)
end


function CheckFuelAndRefuel()
    local fuelLevel = turtle.getFuelLevel()
    if fuelLevel == 0 then
        if EatFuel() == false then
            return false
        end
    end
end

function Mine()
    local distance = 0
    for i = 1,TRAVEL_DIST,1 do
        local didDig = false
        if CanGetHome(distance) then
            local success, data = turtle.inspect()
            if success then
                if data.name == "minecraft:gravel" or data.name == "minecraft:sand" then
                    while(success) do
                        didDig = turtle.dig() or didDig
                        success, data = turtle.inspect()
                    end
                else
                    didDig = turtle.dig() or didDig
                end
            end

            turtle.forward()
            distance = distance + 1
            didDig = turtle.digUp() or didDig
            if didDig then
                turtle.suck()
                ManageInventory()
            end
        else
            print("I can't get home if I continue")
            break
        end
    end

    print("Going home")
    for i = 1,distance,1 do
        turtle.back()
    end
end

function Iterate()
    local fuelLevel = turtle.getFuelLevel()
    if fuelLevel-3 <= 0 then
        local res = EatFuel()
        if res == false then
            print("Not enough fuel to mine another tunnel")
            return false
        end
    end
    turtle.turnLeft()
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    turtle.turnRight()
end

function main()
    while true do
        Mine()
        local success = Iterate()
        if success == false then
            return
        end
    end
end


main()