#
#   Debian Changes Bot
#   Copyright (C) 2015 Sebastian Ramacher <sramacher@debian.org>
#
#   This program is free software: you can redistribute it and/or modify
#   it under the terms of the GNU Affero General Public License as
#   published by the Free Software Foundation, either version 3 of the
#   License, or (at your option) any later version.
#
#   This program 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 Affero General Public License for more details.
#
#   You should have received a copy of the GNU Affero General Public License
#   along with this program.  If not, see <http://www.gnu.org/licenses/>.


import re


def rewrite_topic(topic: str, prefix: str, value: str) -> str:
    if not len(prefix):
        return topic

    if prefix == "dinstall":
        regex = re.compile(r"dinstall: [^|]*")
    else:
        regex = re.compile(rf"^{prefix}: \d+$")

    def update(p):
        if regex.match(p) is not None:
            return f"{prefix}: {value}"
        return p

    return " | ".join(update(p) for p in topic.split(" | "))
