mirror of
https://github.com/nonebot/nonebot2.git
synced 2024-11-30 17:15:08 +08:00
144 lines
3.9 KiB
Python
144 lines
3.9 KiB
Python
"""
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权限
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====
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每个 ``Matcher`` 拥有一个 ``Permission`` ，其中是 **异步** ``PermissionChecker`` 的集合，只要有一个 ``PermissionChecker`` 检查结果为 ``True`` 时就会继续运行。
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\:\:\:tip 提示
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``PermissionChecker`` 既可以是 async function 也可以是 sync function
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\:\:\:
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"""
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import asyncio
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from typing import Union, Optional, Callable, NoReturn, Awaitable, TYPE_CHECKING
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from nonebot.utils import run_sync
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from nonebot.typing import T_PermissionChecker
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if TYPE_CHECKING:
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from nonebot.adapters import Bot, Event
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class Permission:
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__slots__ = ("checkers",)
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def __init__(
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self, *checkers: Callable[["Bot", "Event"],
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Awaitable[bool]]) -> None:
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"""
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:参数:
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* ``*checkers: Callable[[Bot, Event], Awaitable[bool]]``: **异步** PermissionChecker
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"""
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self.checkers = set(checkers)
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"""
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:说明:
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存储 ``PermissionChecker``
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:类型:
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* ``Set[Callable[[Bot, Event], Awaitable[bool]]]``
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"""
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async def __call__(self, bot: "Bot", event: "Event") -> bool:
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"""
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:说明:
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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``: Bot 对象
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* ``event: Event``: Event 对象
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:返回:
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- ``bool``
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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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*map(lambda c: c(bot, event), self.checkers))
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return any(results)
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def __and__(self, other) -> 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",
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T_PermissionChecker]]) -> "Permission":
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checkers = self.checkers.copy()
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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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checkers |= other.checkers
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elif asyncio.iscoroutinefunction(other):
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checkers.add(other) # type: ignore
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else:
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checkers.add(run_sync(other))
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return Permission(*checkers)
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async def _message(bot: "Bot", event: "Event") -> bool:
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return event.get_type() == "message"
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async def _notice(bot: "Bot", event: "Event") -> bool:
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return event.get_type() == "notice"
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async def _request(bot: "Bot", event: "Event") -> bool:
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return event.get_type() == "request"
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async def _metaevent(bot: "Bot", event: "Event") -> bool:
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return event.get_type() == "meta_event"
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MESSAGE = Permission(_message)
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"""
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- **说明**: 匹配任意 ``message`` 类型事件，仅在需要同时捕获不同类型事件时使用。优先使用 message type 的 Matcher。
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"""
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NOTICE = Permission(_notice)
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"""
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- **说明**: 匹配任意 ``notice`` 类型事件，仅在需要同时捕获不同类型事件时使用。优先使用 notice type 的 Matcher。
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"""
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REQUEST = Permission(_request)
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"""
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- **说明**: 匹配任意 ``request`` 类型事件，仅在需要同时捕获不同类型事件时使用。优先使用 request type 的 Matcher。
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"""
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METAEVENT = Permission(_metaevent)
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"""
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- **说明**: 匹配任意 ``meta_event`` 类型事件，仅在需要同时捕获不同类型事件时使用。优先使用 meta_event type 的 Matcher。
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"""
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def USER(*user: str, perm: Permission = Permission()):
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"""
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:说明:
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在白名单内且满足 perm
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:参数:
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* ``*user: str``: 白名单
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* ``perm: Permission``: 需要同时满足的权限
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"""
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async def _user(bot: "Bot", event: "Event") -> bool:
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return event.get_session_id() in user and await perm(bot, event)
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return Permission(_user)
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async def _superuser(bot: "Bot", event: "Event") -> bool:
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return event.get_type() == "message" and event.get_user_id(
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) in bot.config.superusers
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SUPERUSER = Permission(_superuser)
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"""
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- **说明**: 匹配任意超级用户消息类型事件
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"""
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