mirror of
https://github.com/nonebot/nonebot2.git
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475 lines
13 KiB
Python
475 lines
13 KiB
Python
"""
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协议适配基类
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============
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各协议请继承以下基类，并使用 ``driver.register_adapter`` 注册适配器
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"""
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import abc
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from copy import copy
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from typing_extensions import Literal
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from functools import reduce, partial
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from dataclasses import dataclass, field
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from typing import Any, Dict, Union, TypeVar, Mapping, Optional, Callable, Iterable, Iterator, Awaitable, TYPE_CHECKING
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from pydantic import BaseModel
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from nonebot.utils import DataclassEncoder
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if TYPE_CHECKING:
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from nonebot.config import Config
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from nonebot.drivers import Driver, WebSocket
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class Bot(abc.ABC):
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"""
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Bot 基类。用于处理上报消息，并提供 API 调用接口。
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"""
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driver: "Driver"
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"""Driver 对象"""
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config: "Config"
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"""Config 配置对象"""
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@abc.abstractmethod
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def __init__(self,
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connection_type: str,
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self_id: str,
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*,
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websocket: Optional["WebSocket"] = None):
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"""
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:参数:
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* ``connection_type: str``: http 或者 websocket
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* ``self_id: str``: 机器人 ID
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* ``websocket: Optional[WebSocket]``: Websocket 连接对象
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"""
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self.connection_type = connection_type
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"""连接类型"""
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self.self_id = self_id
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"""机器人 ID"""
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self.websocket = websocket
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"""Websocket 连接对象"""
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def __getattr__(self, name: str) -> Callable[..., Awaitable[Any]]:
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return partial(self.call_api, name)
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@property
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@abc.abstractmethod
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def type(self) -> str:
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"""Adapter 类型"""
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raise NotImplementedError
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@classmethod
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def register(cls, driver: "Driver", config: "Config"):
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"""
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:说明:
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`register` 方法会在 `driver.register_adapter` 时被调用，用于初始化相关配置
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"""
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cls.driver = driver
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cls.config = config
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@classmethod
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@abc.abstractmethod
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async def check_permission(cls, driver: "Driver", connection_type: str,
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headers: dict, body: Optional[dict]) -> str:
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"""
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:说明:
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检查连接请求是否合法的函数，如果合法则返回当前连接 ``唯一标识符``，通常为机器人 ID；如果不合法则抛出 ``RequestDenied`` 异常。
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:参数:
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* ``driver: Driver``: Driver 对象
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* ``connection_type: str``: 连接类型
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* ``headers: dict``: 请求头
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* ``body: Optional[dict]``: 请求数据，WebSocket 连接该部分为空
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:返回:
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- ``str``: 连接唯一标识符
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:异常:
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- ``RequestDenied``: 请求非法
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"""
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raise NotImplementedError
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@abc.abstractmethod
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async def handle_message(self, message: dict):
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"""
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:说明:
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处理上报消息的函数，转换为 ``Event`` 事件后调用 ``nonebot.message.handle_event`` 进一步处理事件。
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:参数:
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* ``message: dict``: 收到的上报消息
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"""
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raise NotImplementedError
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@abc.abstractmethod
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async def call_api(self, api: str, **data):
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"""
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:说明:
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调用机器人 API 接口，可以通过该函数或直接通过 bot 属性进行调用
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:参数:
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* ``api: str``: API 名称
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* ``**data``: API 数据
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:示例:
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.. code-block:: python
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await bot.call_api("send_msg", message="hello world")
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await bot.send_msg(message="hello world")
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"""
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raise NotImplementedError
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@abc.abstractmethod
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async def send(self, event: "Event",
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message: Union[str, "Message", "MessageSegment"], **kwargs):
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"""
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:说明:
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调用机器人基础发送消息接口
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:参数:
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* ``event: Event``: 上报事件
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* ``message: Union[str, Message, MessageSegment]``: 要发送的消息
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* ``**kwargs``
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"""
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raise NotImplementedError
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T_Message = TypeVar("T_Message", bound="Message")
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T_MessageSegment = TypeVar("T_MessageSegment", bound="MessageSegment")
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@dataclass
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class MessageSegment(abc.ABC):
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"""消息段基类"""
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type: str
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"""
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- 类型: ``str``
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- 说明: 消息段类型
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"""
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data: Dict[str, Any] = field(default_factory=lambda: {})
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"""
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- 类型: ``Dict[str, Union[str, list]]``
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- 说明: 消息段数据
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"""
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@abc.abstractmethod
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def __str__(self: T_MessageSegment) -> str:
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"""该消息段所代表的 str，在命令匹配部分使用"""
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raise NotImplementedError
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@abc.abstractmethod
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def __add__(self: T_MessageSegment, other: Union[str, T_MessageSegment,
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T_Message]) -> T_Message:
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"""你需要在这里实现不同消息段的合并：
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比如：
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if isinstance(other, str):
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...
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elif isinstance(other, MessageSegment):
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...
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注意：需要返回一个新生成的对象
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"""
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raise NotImplementedError
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@abc.abstractmethod
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def __radd__(
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self: T_MessageSegment, other: Union[str, dict, list, T_MessageSegment,
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T_Message]) -> "T_Message":
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"""你需要在这里实现不同消息段的合并：
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比如：
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if isinstance(other, str):
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...
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elif isinstance(other, MessageSegment):
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...
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注意：需要返回一个新生成的对象
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"""
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raise NotImplementedError
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def __getitem__(self, key):
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return getattr(self, key)
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def __setitem__(self, key, value):
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return setattr(self, key, value)
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def get(self, key, default=None):
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return getattr(self, key, default)
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def copy(self: T_MessageSegment) -> T_MessageSegment:
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return copy(self)
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@abc.abstractmethod
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def is_text(self) -> bool:
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raise NotImplementedError
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class Message(list, abc.ABC):
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"""消息数组"""
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def __init__(self,
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message: Union[str, None, Mapping, Iterable[Mapping],
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T_MessageSegment, T_Message, Any] = None,
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*args,
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**kwargs):
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"""
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:参数:
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* ``message: Union[str, list, dict, MessageSegment, Message, Any]``: 消息内容
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"""
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super().__init__(*args, **kwargs)
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if message is None:
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return
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elif isinstance(message, Message):
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self.extend(message)
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elif isinstance(message, MessageSegment):
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self.append(message)
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else:
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self.extend(self._construct(message))
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def __str__(self):
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return ''.join((str(seg) for seg in self))
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@classmethod
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def __get_validators__(cls):
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yield cls._validate
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@classmethod
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def _validate(cls, value):
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return cls(value)
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@staticmethod
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@abc.abstractmethod
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def _construct(
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msg: Union[str, Mapping, Iterable[Mapping], Any]
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) -> Iterable[T_MessageSegment]:
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raise NotImplementedError
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def __add__(self: T_Message, other: Union[str, T_MessageSegment,
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T_Message]) -> T_Message:
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result = self.__class__(self)
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if isinstance(other, str):
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result.extend(self._construct(other))
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elif isinstance(other, MessageSegment):
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result.append(other)
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elif isinstance(other, Message):
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result.extend(other)
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return result
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def __radd__(self: T_Message, other: Union[str, T_MessageSegment,
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T_Message]) -> T_Message:
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result = self.__class__(other)
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return result.__add__(self)
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def __iadd__(self: T_Message, other: Union[str, T_MessageSegment,
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T_Message]) -> T_Message:
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if isinstance(other, str):
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self.extend(self._construct(other))
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elif isinstance(other, MessageSegment):
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self.append(other)
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elif isinstance(other, Message):
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self.extend(other)
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return self
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def append(self: T_Message, obj: Union[str, T_MessageSegment]) -> T_Message:
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"""
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:说明:
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添加一个消息段到消息数组末尾
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:参数:
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* ``obj: Union[str, MessageSegment]``: 要添加的消息段
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"""
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if isinstance(obj, MessageSegment):
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super().append(obj)
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elif isinstance(obj, str):
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self.extend(self._construct(obj))
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else:
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raise ValueError(f"Unexpected type: {type(obj)} {obj}")
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return self
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def extend(self: T_Message,
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obj: Union[T_Message, Iterable[T_MessageSegment]]) -> T_Message:
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"""
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:说明:
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拼接一个消息数组或多个消息段到消息数组末尾
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:参数:
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* ``obj: Union[Message, Iterable[MessageSegment]]``: 要添加的消息数组
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"""
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for segment in obj:
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self.append(segment)
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return self
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def reduce(self: T_Message) -> None:
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"""
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:说明:
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缩减消息数组，即按 MessageSegment 的实现拼接相邻消息段
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"""
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index = 0
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while index < len(self):
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if index > 0 and self[index -
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1].is_text() and self[index].is_text():
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self[index - 1] += self[index]
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del self[index]
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else:
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index += 1
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def extract_plain_text(self: T_Message) -> str:
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"""
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:说明:
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提取消息内纯文本消息
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"""
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def _concat(x: str, y: T_MessageSegment) -> str:
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return f"{x} {y}" if y.is_text() else x
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plain_text = reduce(_concat, self, "")
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return plain_text[1:] if plain_text else plain_text
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class Event(abc.ABC, BaseModel):
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"""Event 基类。提供获取关键信息的方法，其余信息可直接获取。"""
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class Config:
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extra = "allow"
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json_encoders = {Message: DataclassEncoder}
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@abc.abstractmethod
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def get_type(self) -> str:
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"""
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:说明:
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获取事件类型的方法，类型通常为 NoneBot 内置的四种类型。
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:返回:
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* ``Literal["message", "notice", "request", "meta_event"]``
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* ``str``
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"""
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raise NotImplementedError
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@abc.abstractmethod
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def get_event_name(self) -> str:
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"""
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:说明:
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获取事件名称的方法。
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:返回:
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* ``str``
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"""
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raise NotImplementedError
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@abc.abstractmethod
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def get_event_description(self) -> str:
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"""
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:说明:
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获取事件描述的方法，通常为事件具体内容。
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:返回:
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* ``str``
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"""
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raise NotImplementedError
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def __str__(self) -> str:
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return f"[{self.get_event_name()}]: {self.get_event_description()}"
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def get_log_string(self) -> str:
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"""
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:说明:
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获取事件日志信息的方法，通常你不需要修改这个方法，只有当希望 NoneBot 隐藏该事件日志时，可以抛出 ``NoLogException`` 异常。
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:返回:
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* ``str``
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:异常:
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- ``NoLogException``
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"""
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return f"[{self.get_event_name()}]: {self.get_event_description()}"
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@abc.abstractmethod
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def get_user_id(self) -> str:
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"""
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:说明:
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获取事件主体 id 的方法，通常是用户 id 。
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:返回:
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* ``str``
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"""
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raise NotImplementedError
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@abc.abstractmethod
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def get_session_id(self) -> str:
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"""
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:说明:
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获取会话 id 的方法，用于判断当前事件属于哪一个会话，通常是用户 id、群组 id 组合。
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:返回:
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* ``str``
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"""
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raise NotImplementedError
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@abc.abstractmethod
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def get_message(self) -> "Message":
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"""
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:说明:
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获取事件消息内容的方法。
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:返回:
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* ``Message``
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"""
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raise NotImplementedError
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def get_plaintext(self) -> str:
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"""
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:说明:
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获取消息纯文本的方法，通常不需要修改，默认通过 ``get_message().extract_plain_text`` 获取。
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:返回:
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* ``str``
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"""
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return self.get_message().extract_plain_text()
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@abc.abstractmethod
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def is_tome(self) -> bool:
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"""
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:说明:
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获取事件是否与机器人有关的方法。
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:返回:
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* ``bool``
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"""
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raise NotImplementedError
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