tool_level_enchanting/init.lua

local path = minetest.get_modpath('tool_level_enchanting')
local S = minetest.get_translator("tool_level_enchanting")
tool_level_enchanting = {}

dofile(path .. '/enchants.lua')
level_divide_by = tonumber(minetest.settings:get("tool_level_enchanting_level_divide_by")) or 50

-- function to calculate levels
function tool_level_enchanting.get_level(uses)
    --local uses_number = tonumber(uses) or 0
    if uses < 50 then
        return 1
      else
        return math.floor((25 + math.sqrt(625 + 100 * uses))/level_divide_by)
    end
end

function tool_level_enchanting.create_description(name, uses)
    local level = tool_level_enchanting.get_level(tonumber(uses) or 0)
    local newdesc = S(
        '@1\nLevel @2\nUses: @3',
        name,
        level,
        (type(uses) == "number" and uses or 0)
    )
    return newdesc
end

function tool_level_enchanting.on_use(itemstack, user, node, digparams)
    local itemmeta = itemstack:get_meta()
    local itemdef  = itemstack:get_definition()
    local itemdesc = itemdef.original_description or ""
    local dugnodes = tonumber(itemmeta:get_string("dug")) or 0
    local pname = user:get_player_name()
    -- Enchant Variables
    local unbreaking = tonumber(itemmeta:get_string("unbreaking")) or 0

    -- Make sure play exists
    if not pname then return itemstack end 

    -- 
    if digparams.wear > 0 then
        dugnodes = dugnodes + 1
        itemmeta:set_string("dug", dugnodes)
    end

    if itemstack:get_wear() > 60135 then --FIXME: Make this proc earlier?
        minetest.chat_send_player(user:get_player_name(), S("Your tool is about to break!"))
    end

    itemmeta:set_string("description", tool_level_enchanting.create_description(itemdesc, dugnodes))
    --FIXME: Add Unbreaking here? idk
    if tool_level_enchanting.unbreaking_proc(unbreaking) then
        itemstack:add_wear(digparams.wear)
    end
    return itemstack
end

function tool_level_enchanting.add_tool(name)
    print(name)
    local desc = ItemStack(name):get_definition().description
    minetest.override_item(name, {
        original_description = desc,
        description = tool_level_enchanting.create_description(desc),
        after_use = tool_level_enchanting.on_use
    })
end

tool_level_enchanting.add_tool("default:pick_wood")
tool_level_enchanting.add_tool("default:pick_diamond")