init.lua
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init.lua
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	-- twi_mods/username_restrictions/init.lua
	-- Ban some usernames
	-- Copyright (C) 2024 1F616EMO
	-- SPDX-License-Identifier: LGPL-2.1-or-later

	local banned_parts = {}

	for _, part in ipairs({"admin", "moderator"}) do
	banned_parts[part] = antispoof.normalize(part)
	end

	local auth
	minetest.register_on_prejoinplayer(function(name)
	if name == "singleplayer" or name == minetest.settings:get("name") then return end
	auth = auth or minetest.get_auth_handler()
	if not auth.get_auth(name) then
	if string.find(name, "L+O+L+") then
	-- As unclear as possible yet give some useful message
	return "This username is banned."
	end

	local normalized_name = antispoof.normalize(name)
	for orig_part, norm_part in pairs(banned_parts) do
	if string.find(normalized_name, norm_part) then
	return string.format(
	"Invalid username %s: Username cannt conain \"%s\"",
	name, orig_part
	)
	end
	end
	end
	end)