config.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
# @Version     : Python 3.11.4
# @Software    : Sublime Text 4
# @Author      : StudentCWZ
# @Email       : StudentCWZ@outlook.com
# @Date        : 2023/11/3 19:43
# @File        : config.py
# @Description :
"""


from typing import Any

from flask import Flask
from loguru import logger

from application.libs import ConfigKeyError


class ConfigHelper:
    """
    The ConfigHelper class is a utility for fetching configuration values
    from a Flask application.

    :param app: The Flask application instance from which to fetch configuration values.
    """

    def __init__(self, app: Flask):
        self.app = app

    def __getattr__(self, name: str) -> Any:
        """
        Get a config value as an attribute.

        :param name: The name of the config key.
        :return: The value for the provided key, or None if it does not exist.
        """
        try:
            return self.app.config[name]
        except KeyError:
            logger.error(f'Key {name} not found in configuration')
            raise ConfigKeyError(name)

    def __repr__(self):
        return f"<ConfigHelper with app {self.app}>"

    def __str__(self):
        return f"ConfigHelper for app {self.app}"