mirror of
https://github.com/nonebot/nonebot2.git
synced 2024-11-24 09:05:04 +08:00
140 lines
3.8 KiB
Python
140 lines
3.8 KiB
Python
import asyncio
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from contextlib import AsyncExitStack
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from typing import Any, Set, Tuple, Union, NoReturn, Optional, Coroutine
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from nonebot.dependencies import Dependent
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from nonebot.utils import run_coro_with_catch
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from nonebot.exception import SkippedException
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from nonebot.typing import T_DependencyCache, T_PermissionChecker
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from .adapter import Bot, Event
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from .params import BotParam, EventParam, DependParam, DefaultParam
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class Permission:
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"""{ref}`nonebot.matcher.Matcher` 权限类。
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当事件传递时，在 {ref}`nonebot.matcher.Matcher` 运行前进行检查。
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参数:
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checkers: PermissionChecker
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用法:
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```python
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Permission(async_function) | sync_function
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# 等价于
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Permission(async_function, sync_function)
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```
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"""
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__slots__ = ("checkers",)
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HANDLER_PARAM_TYPES = [
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DependParam,
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BotParam,
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EventParam,
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DefaultParam,
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]
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def __init__(self, *checkers: Union[T_PermissionChecker, Dependent[bool]]) -> None:
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self.checkers: Set[Dependent[bool]] = set(
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checker
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if isinstance(checker, Dependent)
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else Dependent[bool].parse(
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call=checker, allow_types=self.HANDLER_PARAM_TYPES
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)
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for checker in checkers
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)
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"""存储 `PermissionChecker`"""
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async def __call__(
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self,
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bot: Bot,
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event: Event,
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stack: Optional[AsyncExitStack] = None,
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dependency_cache: Optional[T_DependencyCache] = None,
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) -> bool:
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"""检查是否满足某个权限
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参数:
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bot: Bot 对象
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event: Event 对象
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stack: 异步上下文栈
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dependency_cache: 依赖缓存
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"""
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if not self.checkers:
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return True
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results = await asyncio.gather(
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*(
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run_coro_with_catch(
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checker(
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bot=bot,
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event=event,
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stack=stack,
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dependency_cache=dependency_cache,
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),
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(SkippedException,),
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False,
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)
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for checker in self.checkers
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),
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)
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return any(results)
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def __and__(self, other: object) -> NoReturn:
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raise RuntimeError("And operation between Permissions is not allowed.")
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def __or__(
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self, other: Optional[Union["Permission", T_PermissionChecker]]
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) -> "Permission":
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if other is None:
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return self
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elif isinstance(other, Permission):
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return Permission(*self.checkers, *other.checkers)
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else:
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return Permission(*self.checkers, other)
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def __ror__(
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self, other: Optional[Union["Permission", T_PermissionChecker]]
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) -> "Permission":
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if other is None:
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return self
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elif isinstance(other, Permission):
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return Permission(*other.checkers, *self.checkers)
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else:
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return Permission(other, *self.checkers)
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class User:
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"""检查当前事件是否属于指定会话
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参数:
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users: 会话 ID 元组
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perm: 需同时满足的权限
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"""
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__slots__ = ("users", "perm")
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def __init__(
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self, users: Tuple[str, ...], perm: Optional[Permission] = None
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) -> None:
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self.users = users
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self.perm = perm
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async def __call__(self, bot: Bot, event: Event) -> bool:
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return bool(
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event.get_session_id() in self.users
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and (self.perm is None or await self.perm(bot, event))
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)
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def USER(*users: str, perm: Optional[Permission] = None):
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"""匹配当前事件属于指定会话
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参数:
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user: 会话白名单
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perm: 需要同时满足的权限
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"""
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return Permission(User(users, perm))
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