Inventory

public Inventory getGui(Player player, String id) {
        if (!Main.plugin.config.contains(id))
            return null;
        ConfigurationSection gui = Main.plugin.config.getConfigurationSection(id);
        Inventory inv = Bukkit.createInventory(null, gui.getInt("Size"), gui.getString("Title"));
        ItemStack bg = null;
        for (String res : gui.getKeys(false)) {
            if (!gui.contains(res + ".Icon"))
                continue;
            if (gui.contains(res + ".Permission") && !player.hasPermission(gui.getString(res + ".Permission"))) {
                continue;
            }
            ItemStack item = new ItemStack(Material.valueOf(gui.getString(res + ".Icon")));
            if (gui.contains(res + ".Amount"))
                item.setAmount(gui.getInt(res + ".Amount"));
            if (gui.contains(res + ".Data"))
                item.setDurability((short) gui.getInt(res + ".Data"));
            ItemMeta meta = item.getItemMeta();
            if (gui.contains(res + ".Name"))
                meta.setDisplayName(MSG.color("&r" + gui.getString(res + ".Name")));
            if (gui.contains(res + ".Lore")) {
                List<String> lore = new ArrayList<String>();
                for (String temp : gui.getStringList(res + ".Lore"))
                    lore.add(MSG.color("&r" + temp));
                meta.setLore(lore);
            }
            if (gui.contains(res + ".Enchantments")) {
                ConfigurationSection enchs = gui.getConfigurationSection(res + ".Enchantments");
                for (String enchant : enchs.getKeys(false)) {
                    int level = 1;
                    boolean visible = true;
                    if (enchs.contains(enchant + ".Level"))
                        level = enchs.getInt(enchant + ".Level");
                    if (enchs.contains(enchant + ".Visible"))
                        visible = enchs.getBoolean(enchant + ".Visible");
                    meta.addEnchant(Enchantment.getByName(enchant.toUpperCase()), level, visible);
                }
            }
            item.setItemMeta(meta);
            if (res.equals("BACKGROUND_ITEM")) {
                bg = item;
                continue;
            }
            inv.setItem(gui.getInt(res + ".Slot"), item);
        }
        if (bg != null) {
            for (int i = 0; i < inv.getSize(); i++) {
                if (inv.getItem(i) == null || inv.getItem(i).getType() == Material.AIR) {
                    inv.setItem(i, bg);
                }
            }
        }
        return inv;
    }