mirror of
https://github.com/nonebot/nonebot2.git
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513 lines
15 KiB
Python
513 lines
15 KiB
Python
"""本模块定义了依赖注入的各类参数。
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FrontMatter:
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sidebar_position: 4
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description: nonebot.params 模块
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"""
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import asyncio
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import inspect
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import warnings
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from typing_extensions import Literal
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from typing import Any, Dict, List, Tuple, Callable, Optional, cast
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from contextlib import AsyncExitStack, contextmanager, asynccontextmanager
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from pydantic.fields import Required, Undefined, ModelField
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from nonebot.log import logger
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from nonebot.exception import TypeMisMatch
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from nonebot.adapters import Bot, Event, Message
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from nonebot.dependencies import Param, Dependent, CustomConfig
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from nonebot.typing import T_State, T_Handler, T_DependencyCache
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from nonebot.consts import (
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CMD_KEY,
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PREFIX_KEY,
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REGEX_DICT,
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SHELL_ARGS,
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SHELL_ARGV,
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CMD_ARG_KEY,
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RAW_CMD_KEY,
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REGEX_GROUP,
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REGEX_MATCHED,
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)
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from nonebot.utils import (
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get_name,
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run_sync,
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is_gen_callable,
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run_sync_ctx_manager,
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is_async_gen_callable,
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is_coroutine_callable,
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generic_check_issubclass,
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)
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class DependsInner:
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def __init__(
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self,
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dependency: Optional[T_Handler] = None,
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*,
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use_cache: bool = True,
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) -> None:
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self.dependency = dependency
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self.use_cache = use_cache
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def __repr__(self) -> str:
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dep = get_name(self.dependency)
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cache = "" if self.use_cache else ", use_cache=False"
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return f"{self.__class__.__name__}({dep}{cache})"
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def Depends(
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dependency: Optional[T_Handler] = None,
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*,
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use_cache: bool = True,
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) -> Any:
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"""子依赖装饰器
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参数:
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dependency: 依赖函数。默认为参数的类型注释。
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use_cache: 是否使用缓存。默认为 `True`。
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用法:
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```python
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def depend_func() -> Any:
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return ...
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def depend_gen_func():
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try:
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yield ...
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finally:
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...
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async def handler(param_name: Any = Depends(depend_func), gen: Any = Depends(depend_gen_func)):
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...
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```
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"""
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return DependsInner(dependency, use_cache=use_cache)
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class DependParam(Param):
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"""子依赖参数"""
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@classmethod
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def _check_param(
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cls,
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dependent: Dependent,
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name: str,
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param: inspect.Parameter,
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) -> Optional["DependParam"]:
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if isinstance(param.default, DependsInner):
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dependency: T_Handler
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if param.default.dependency is None:
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assert param.annotation is not param.empty, "Dependency cannot be empty"
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dependency = param.annotation
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else:
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dependency = param.default.dependency
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sub_dependent = Dependent[Any].parse(
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call=dependency,
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allow_types=dependent.allow_types,
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)
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dependent.pre_checkers.extend(sub_dependent.pre_checkers)
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sub_dependent.pre_checkers.clear()
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return cls(
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Required, use_cache=param.default.use_cache, dependent=sub_dependent
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)
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@classmethod
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def _check_parameterless(
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cls, dependent: "Dependent", value: Any
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) -> Optional["Param"]:
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if isinstance(value, DependsInner):
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assert value.dependency, "Dependency cannot be empty"
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dependent = Dependent[Any].parse(
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call=value.dependency, allow_types=dependent.allow_types
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)
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return cls(Required, use_cache=value.use_cache, dependent=dependent)
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async def _solve(
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self,
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stack: Optional[AsyncExitStack] = None,
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dependency_cache: Optional[T_DependencyCache] = None,
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**kwargs: Any,
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) -> Any:
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use_cache: bool = self.extra["use_cache"]
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dependency_cache = {} if dependency_cache is None else dependency_cache
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sub_dependent: Dependent = self.extra["dependent"]
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sub_dependent.call = cast(Callable[..., Any], sub_dependent.call)
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call = sub_dependent.call
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# solve sub dependency with current cache
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sub_values = await sub_dependent.solve(
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stack=stack,
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dependency_cache=dependency_cache,
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**kwargs,
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)
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# run dependency function
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task: asyncio.Task[Any]
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if use_cache and call in dependency_cache:
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solved = await dependency_cache[call]
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elif is_gen_callable(call) or is_async_gen_callable(call):
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assert isinstance(
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stack, AsyncExitStack
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), "Generator dependency should be called in context"
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if is_gen_callable(call):
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cm = run_sync_ctx_manager(contextmanager(call)(**sub_values))
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else:
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cm = asynccontextmanager(call)(**sub_values)
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task = asyncio.create_task(stack.enter_async_context(cm))
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dependency_cache[call] = task
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solved = await task
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elif is_coroutine_callable(call):
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task = asyncio.create_task(call(**sub_values))
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dependency_cache[call] = task
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solved = await task
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else:
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task = asyncio.create_task(run_sync(call)(**sub_values))
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dependency_cache[call] = task
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solved = await task
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return solved
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class _BotChecker(Param):
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async def _solve(self, bot: Bot, **kwargs: Any) -> Any:
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field: ModelField = self.extra["field"]
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_, errs_ = field.validate(bot, {}, loc=("bot",))
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if errs_:
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logger.debug(
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f"Bot type {type(bot)} not match "
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f"annotation {field._type_display()}, ignored"
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)
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raise TypeMisMatch(field, bot)
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class BotParam(Param):
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"""{ref}`nonebot.adapters._bot.Bot` 参数"""
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@classmethod
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def _check_param(
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cls, dependent: Dependent, name: str, param: inspect.Parameter
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) -> Optional["BotParam"]:
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if param.default == param.empty:
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if generic_check_issubclass(param.annotation, Bot):
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if param.annotation is not Bot:
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dependent.pre_checkers.append(
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_BotChecker(
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Required,
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field=ModelField(
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name=name,
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type_=param.annotation,
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class_validators=None,
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model_config=CustomConfig,
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default=None,
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required=True,
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),
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)
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)
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return cls(Required)
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elif param.annotation == param.empty and name == "bot":
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return cls(Required)
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async def _solve(self, bot: Bot, **kwargs: Any) -> Any:
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return bot
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class _EventChecker(Param):
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async def _solve(self, event: Event, **kwargs: Any) -> Any:
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field: ModelField = self.extra["field"]
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_, errs_ = field.validate(event, {}, loc=("event",))
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if errs_:
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logger.debug(
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f"Event type {type(event)} not match "
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f"annotation {field._type_display()}, ignored"
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)
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raise TypeMisMatch(field, event)
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class EventParam(Param):
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"""{ref}`nonebot.adapters._event.Event` 参数"""
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@classmethod
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def _check_param(
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cls, dependent: Dependent, name: str, param: inspect.Parameter
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) -> Optional["EventParam"]:
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if param.default == param.empty:
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if generic_check_issubclass(param.annotation, Event):
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if param.annotation is not Event:
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dependent.pre_checkers.append(
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_EventChecker(
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Required,
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field=ModelField(
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name=name,
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type_=param.annotation,
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class_validators=None,
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model_config=CustomConfig,
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default=None,
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required=True,
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),
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)
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)
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return cls(Required)
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elif param.annotation == param.empty and name == "event":
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return cls(Required)
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async def _solve(self, event: Event, **kwargs: Any) -> Any:
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return event
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async def _event_type(event: Event) -> str:
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return event.get_type()
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def EventType() -> str:
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"""{ref}`nonebot.adapters._event.Event` 类型参数"""
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return Depends(_event_type)
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async def _event_message(event: Event) -> Message:
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return event.get_message()
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def EventMessage() -> Any:
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"""{ref}`nonebot.adapters._event.Event` 消息参数"""
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return Depends(_event_message)
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async def _event_plain_text(event: Event) -> str:
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return event.get_plaintext()
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def EventPlainText() -> str:
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"""{ref}`nonebot.adapters._event.Event` 纯文本消息参数"""
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return Depends(_event_plain_text)
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async def _event_to_me(event: Event) -> bool:
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return event.is_tome()
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def EventToMe() -> bool:
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"""{ref}`nonebot.adapters._event.Event` `to_me` 参数"""
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return Depends(_event_to_me)
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class StateInner(T_State):
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...
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def State() -> T_State:
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"""**Deprecated**: 事件处理状态参数，请直接使用 {ref}`nonebot.typing.T_State`"""
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warnings.warn("State() is deprecated, use `T_State` instead", DeprecationWarning)
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return StateInner()
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class StateParam(Param):
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"""事件处理状态参数"""
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@classmethod
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def _check_param(
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cls, dependent: Dependent, name: str, param: inspect.Parameter
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) -> Optional["StateParam"]:
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if isinstance(param.default, StateInner):
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return cls(Required)
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elif param.default == param.empty:
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if param.annotation is T_State:
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return cls(Required)
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elif param.annotation == param.empty and name == "state":
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return cls(Required)
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async def _solve(self, state: T_State, **kwargs: Any) -> Any:
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return state
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def _command(state: T_State) -> Message:
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return state[PREFIX_KEY][CMD_KEY]
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def Command() -> Tuple[str, ...]:
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"""消息命令元组"""
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return Depends(_command)
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def _raw_command(state: T_State) -> Message:
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return state[PREFIX_KEY][RAW_CMD_KEY]
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def RawCommand() -> str:
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"""消息命令文本"""
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return Depends(_raw_command)
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def _command_arg(state: T_State) -> Message:
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return state[PREFIX_KEY][CMD_ARG_KEY]
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def CommandArg() -> Any:
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"""消息命令参数"""
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return Depends(_command_arg)
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def _shell_command_args(state: T_State) -> Any:
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return state[SHELL_ARGS]
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def ShellCommandArgs():
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"""shell 命令解析后的参数字典"""
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return Depends(_shell_command_args, use_cache=False)
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def _shell_command_argv(state: T_State) -> List[str]:
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return state[SHELL_ARGV]
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def ShellCommandArgv() -> Any:
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"""shell 命令原始参数列表"""
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return Depends(_shell_command_argv, use_cache=False)
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def _regex_matched(state: T_State) -> str:
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return state[REGEX_MATCHED]
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def RegexMatched() -> str:
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"""正则匹配结果"""
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return Depends(_regex_matched, use_cache=False)
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def _regex_group(state: T_State):
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return state[REGEX_GROUP]
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def RegexGroup() -> Tuple[Any, ...]:
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"""正则匹配结果 group 元组"""
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return Depends(_regex_group, use_cache=False)
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def _regex_dict(state: T_State):
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return state[REGEX_DICT]
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def RegexDict() -> Dict[str, Any]:
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"""正则匹配结果 group 字典"""
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return Depends(_regex_dict, use_cache=False)
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class MatcherParam(Param):
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"""事件响应器实例参数"""
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@classmethod
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def _check_param(
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cls, dependent: Dependent, name: str, param: inspect.Parameter
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) -> Optional["MatcherParam"]:
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if generic_check_issubclass(param.annotation, Matcher) or (
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param.annotation == param.empty and name == "matcher"
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):
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return cls(Required)
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async def _solve(self, matcher: "Matcher", **kwargs: Any) -> Any:
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return matcher
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def Received(id: Optional[str] = None, default: Any = None) -> Any:
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"""`receive` 事件参数"""
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def _received(matcher: "Matcher"):
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return matcher.get_receive(id or "", default)
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return Depends(_received, use_cache=False)
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def LastReceived(default: Any = None) -> Any:
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"""`last_receive` 事件参数"""
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def _last_received(matcher: "Matcher") -> Any:
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return matcher.get_last_receive(default)
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return Depends(_last_received, use_cache=False)
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class ArgInner:
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def __init__(
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self, key: Optional[str], type: Literal["message", "str", "plaintext"]
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) -> None:
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self.key = key
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self.type = type
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def Arg(key: Optional[str] = None) -> Any:
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"""`got` 的 Arg 参数消息"""
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return ArgInner(key, "message")
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def ArgStr(key: Optional[str] = None) -> str:
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"""`got` 的 Arg 参数消息文本"""
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return ArgInner(key, "str") # type: ignore
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def ArgPlainText(key: Optional[str] = None) -> str:
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"""`got` 的 Arg 参数消息纯文本"""
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return ArgInner(key, "plaintext") # type: ignore
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class ArgParam(Param):
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"""`got` 的 Arg 参数"""
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@classmethod
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def _check_param(
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cls, dependent: Dependent, name: str, param: inspect.Parameter
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) -> Optional["ArgParam"]:
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if isinstance(param.default, ArgInner):
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return cls(Required, key=param.default.key or name, type=param.default.type)
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async def _solve(self, matcher: "Matcher", **kwargs: Any) -> Any:
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message = matcher.get_arg(self.extra["key"])
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if message is None:
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return message
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if self.extra["type"] == "message":
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return message
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elif self.extra["type"] == "str":
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return str(message)
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else:
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return message.extract_plain_text()
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class ExceptionParam(Param):
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"""`run_postprocessor` 的异常参数"""
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@classmethod
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def _check_param(
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cls, dependent: Dependent, name: str, param: inspect.Parameter
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) -> Optional["ExceptionParam"]:
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if generic_check_issubclass(param.annotation, Exception) or (
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param.annotation == param.empty and name == "exception"
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):
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return cls(Required)
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async def _solve(self, exception: Optional[Exception] = None, **kwargs: Any) -> Any:
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return exception
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class DefaultParam(Param):
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"""默认值参数"""
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@classmethod
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def _check_param(
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cls, dependent: Dependent, name: str, param: inspect.Parameter
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) -> Optional["DefaultParam"]:
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if param.default != param.empty:
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return cls(param.default)
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async def _solve(self, **kwargs: Any) -> Any:
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return Undefined
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from nonebot.matcher import Matcher
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__autodoc__ = {
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"DependsInner": False,
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"StateInner": False,
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"ArgInner": False,
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}
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