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Viewing / Editing File: persistent_state.py

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import json
from logging import getLogger
from pathlib import Path
from typing import Literal

from defence360agent.contracts.config import ANTIVIRUS_MODE
from defence360agent.contracts.plugins import Scope


logger = getLogger(__name__)
BASE_DIR = Path("/var/imunify360")
PERSISTENT_STATE_DIR = BASE_DIR / ".persistent_state"
LOCK_FILES = set()


def register_lock_file(
    lock_file: str, scope: Literal[Scope.AV, Scope.IM360, Scope.AV_IM360]
) -> Path:
    """Register lock file for further usage."""
    _lock_file = PERSISTENT_STATE_DIR / f".{lock_file}.lock"
    if scope == Scope.AV_IM360:
        LOCK_FILES.add(_lock_file)
    elif scope == Scope.AV and ANTIVIRUS_MODE:
        LOCK_FILES.add(_lock_file)
    elif scope == Scope.IM360 and not ANTIVIRUS_MODE:
        LOCK_FILES.add(_lock_file)
    return _lock_file


def save_state(class_name: str, values: dict):
    """Save state to a file in .persistent_state folder."""

    folder_path = PERSISTENT_STATE_DIR
    try:
        folder_path.mkdir(parents=True, exist_ok=True)
        file_path = folder_path / f"{class_name}.state"
        json.dump(values, file_path.open("w"))
    except (AttributeError, OSError) as e:
        logger.error("Failed to save state: %s %s", class_name, e)


def load_state(class_name) -> dict:
    """Load state from a file in .persistent_state folder."""

    folder_path = PERSISTENT_STATE_DIR
    file_path = folder_path / f"{class_name}.state"

    if file_path.exists():
        try:
            return json.load(file_path.open("r"))
        except (json.JSONDecodeError, OSError, UnicodeDecodeError) as e:
            logger.error("Failed to load state: %s %s", class_name, e)
    return dict()


def remove_unused_locks():
    """Remove all unused lock files from .persistent_state folder."""
    for lock_file in PERSISTENT_STATE_DIR.glob("*.lock"):
        if lock_file not in LOCK_FILES:
            lock_file.unlink()
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