252 lines
7.4 KiB
Python
252 lines
7.4 KiB
Python
"""
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权限管理器模块
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该模块负责管理用户权限，支持 admin、op、user 三个权限级别。
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权限数据存储在 `permissions.json` 文件中，格式为：
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{
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"users": {
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"123456": "admin",
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"789012": "op",
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"345678": "user"
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}
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}
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"""
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import json
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import os
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from functools import total_ordering
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from typing import Dict
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from .logger import logger
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from .admin_manager import admin_manager # 导入 AdminManager
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@total_ordering
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class Permission:
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"""
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权限封装类
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封装了权限的名称和等级，并提供了比较方法。
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使用 @total_ordering 装饰器可以自动生成所有的比较运算符。
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"""
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def __init__(self, name: str, level: int):
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"""
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初始化权限对象
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Args:
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name (str): 权限名称 (e.g., "admin", "op")
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level (int): 权限等级，数字越大权限越高
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"""
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self.name = name
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self.level = level
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def __eq__(self, other):
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"""
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判断权限是否相等
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"""
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if not isinstance(other, Permission):
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return NotImplemented
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return self.level == other.level
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def __lt__(self, other):
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"""
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判断权限是否小于另一个权限
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"""
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if not isinstance(other, Permission):
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return NotImplemented
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return self.level < other.level
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def __str__(self) -> str:
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"""
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返回权限的字符串表示（即权限名称）
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"""
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return self.name
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# 定义全局权限常量
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ADMIN = Permission("admin", 3)
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OP = Permission("op", 2)
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USER = Permission("user", 1)
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# 用于从字符串名称查找权限对象的字典
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_PERMISSIONS: Dict[str, Permission] = {
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p.name: p for p in [ADMIN, OP, USER]
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}
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class PermissionManager:
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"""
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权限管理器类
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负责加载、保存和查询用户权限数据。
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使用单例模式，确保全局只有一个权限管理器实例。
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"""
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_instance = None
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def __new__(cls):
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"""
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单例模式实现
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Returns:
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PermissionManager: 全局唯一的权限管理器实例
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"""
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if cls._instance is None:
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cls._instance = super().__new__(cls)
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cls._instance._initialized = False
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return cls._instance
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def __init__(self):
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"""
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初始化权限管理器
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如果已经初始化过，则直接返回。
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"""
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if getattr(self, "_initialized", False):
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return
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# 权限数据文件路径
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self.data_file = os.path.join(
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os.path.dirname(os.path.abspath(__file__)),
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"..",
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"data",
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"permissions.json"
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)
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# 确保数据目录存在
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data_dir = os.path.dirname(self.data_file)
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os.makedirs(data_dir, exist_ok=True)
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# 权限数据存储结构：{"users": {"user_id": "level_name"}}
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self._data: Dict[str, Dict[str, str]] = {"users": {}}
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# 加载现有数据
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self.load()
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self._initialized = True
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logger.info("权限管理器初始化完成")
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def load(self) -> None:
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"""
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从文件加载权限数据
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如果文件不存在，则创建空文件并初始化默认数据结构。
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"""
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try:
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if os.path.exists(self.data_file):
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with open(self.data_file, "r", encoding="utf-8") as f:
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data = json.load(f)
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# 兼容旧格式
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if "users" in data:
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self._data["users"] = data["users"]
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else:
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self._data["users"] = {}
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logger.debug(f"权限数据已从 {self.data_file} 加载")
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else:
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# 文件不存在，创建空文件
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self.save()
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logger.debug(f"创建空的权限数据文件: {self.data_file}")
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except json.JSONDecodeError as e:
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logger.error(f"权限数据文件格式错误: {e}")
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# 文件损坏，重置为空数据
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self._data["users"] = {}
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self.save()
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except Exception as e:
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logger.error(f"加载权限数据失败: {e}")
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self._data["users"] = {}
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def save(self) -> None:
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"""
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将权限数据保存到文件
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"""
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try:
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with open(self.data_file, "w", encoding="utf-8") as f:
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json.dump(self._data, f, indent=2, ensure_ascii=False)
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logger.debug(f"权限数据已保存到 {self.data_file}")
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except Exception as e:
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logger.error(f"保存权限数据失败: {e}")
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async def get_user_permission(self, user_id: int) -> Permission:
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"""
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获取指定用户的权限对象
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Args:
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user_id (int): 用户 QQ 号
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Returns:
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Permission: 用户的权限对象，如果用户不存在则返回默认级别 USER
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"""
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# 首先，通过 AdminManager 检查是否为管理员
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if await admin_manager.is_admin(user_id):
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return ADMIN
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# 如果不是管理员，则从 permissions.json 中查找
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user_id_str = str(user_id)
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level_name = self._data["users"].get(user_id_str, USER.name)
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return _PERMISSIONS.get(level_name, USER)
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def set_user_permission(self, user_id: int, permission: Permission) -> None:
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"""
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设置指定用户的权限级别
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Args:
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user_id (int): 用户 QQ 号
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permission (Permission): 权限对象
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Raises:
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ValueError: 如果权限对象无效
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"""
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if not isinstance(permission, Permission) or permission.name not in _PERMISSIONS:
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raise ValueError(f"无效的权限对象: {permission}")
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user_id_str = str(user_id)
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self._data["users"][user_id_str] = permission.name
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self.save()
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logger.info(f"设置用户 {user_id} 的权限级别为 {permission.name}")
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def remove_user(self, user_id: int) -> None:
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"""
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移除指定用户的权限设置，恢复为默认级别
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Args:
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user_id (int): 用户 QQ 号
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"""
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user_id_str = str(user_id)
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if user_id_str in self._data["users"]:
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del self._data["users"][user_id_str]
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self.save()
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logger.info(f"移除用户 {user_id} 的权限设置")
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async def check_permission(self, user_id: int, required_permission: Permission) -> bool:
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"""
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检查用户是否具有指定权限级别
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Args:
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user_id (int): 用户 QQ 号
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required_permission (Permission): 所需的权限对象
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Returns:
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bool: 如果用户权限 >= 所需权限，返回 True，否则返回 False
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"""
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user_permission = await self.get_user_permission(user_id)
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return user_permission >= required_permission
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def get_all_users(self) -> Dict[str, str]:
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"""
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获取所有设置了权限的用户及其级别名称
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Returns:
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Dict[str, str]: 用户ID到权限级别名称的映射
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"""
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return self._data["users"].copy()
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def clear_all(self) -> None:
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"""
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清空所有权限设置
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"""
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self._data["users"].clear()
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self.save()
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logger.info("已清空所有权限设置")
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# 全局权限管理器实例
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permission_manager = PermissionManager() |