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Path: /opt/imunify360/venv/lib64/python3.11/site-packages/defence360agent/utils/

Viewing File: kwconfig.py

import re
from typing import Optional

from defence360agent.utils import atomic_rewrite


class KWConfig:
    """
    Basic class for working with key-value configuration files
    Subclasses must define SEARCH_PATTERN and WRITE_PATTERN
    attributes
    """

    SEARCH_PATTERN = DEFAULT_FILENAME = WRITE_PATTERN = ""
    ALLOW_EMPTY_CONFIG = True

    def __init__(self, name, filename=None):
        assert self.SEARCH_PATTERN

        self._pattern = re.compile(
            self.SEARCH_PATTERN.format(name), re.MULTILINE
        )
        self._filename = filename or self.DEFAULT_FILENAME
        self._name = name

    def set(self, value) -> Optional[str]:
        assert self.WRITE_PATTERN

        with open(self._filename) as f:
            content = f.read()

        old_value = self._parse(content)
        if old_value is None:
            # If no variable found, just add to the bottom
            content += (
                "\n" + self.WRITE_PATTERN.format(self._name, value) + "\n"
            )
        else:
            content = self._pattern.sub(
                self.WRITE_PATTERN.format(self._name, value), content
            )

        atomic_rewrite(
            self._filename,
            content,
            allow_empty_content=self.ALLOW_EMPTY_CONFIG,
        )
        return old_value

    def get(self) -> Optional[str]:
        with open(self._filename) as f:
            content = f.read()
        return self._parse(content)

    def _parse(self, content) -> Optional[str]:
        match = self._pattern.search(content)
        return match and match.group(1)


class PureFTPBaseConfig(KWConfig):
    SEARCH_PATTERN = r"^\s*?{}\s+(.*?)\s*?$"
    WRITE_PATTERN = "{} {}"
    DEFAULT_FILENAME = "/etc/pure-ftpd.conf"