#  Hydrogram - Telegram MTProto API Client Library for Python
#  Copyright (C) 2017-2023 Dan 
#  Copyright (C) 2023-present Hydrogram 
#
#  This file is part of Hydrogram.
#
#  Hydrogram is free software: you can redistribute it and/or modify
#  it under the terms of the GNU Lesser General Public License as published
#  by the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#
#  Hydrogram is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU Lesser General Public License for more details.
#
#  You should have received a copy of the GNU Lesser General Public License
#  along with Hydrogram.  If not, see .

import re
from struct import unpack

# SMP = Supplementary Multilingual Plane: https://en.wikipedia.org/wiki/Plane_(Unicode)#Overview
SMP_RE = re.compile(r"[\U00010000-\U0010FFFF]")


def add_surrogates(text):
    # Replace each SMP code point with a surrogate pair
    return SMP_RE.sub(
        lambda match:  # Split SMP in two surrogates
        "".join(chr(i) for i in unpack("