mirror of
https://github.com/nonebot/nonebot2.git
synced 2024-11-24 09:05:04 +08:00
126 lines
4.0 KiB
Python
126 lines
4.0 KiB
Python
"""
|
|
事件处理函数
|
|
============
|
|
|
|
该模块实现事件处理函数的封装，以实现动态参数等功能。
|
|
"""
|
|
|
|
from contextlib import AsyncExitStack
|
|
from typing import Any, Dict, List, Type, Callable, Optional
|
|
|
|
from nonebot.utils import get_name, run_sync, is_coroutine_callable
|
|
from nonebot.dependencies import (
|
|
Param,
|
|
Dependent,
|
|
DependsWrapper,
|
|
get_dependent,
|
|
solve_dependencies,
|
|
get_parameterless_sub_dependant,
|
|
)
|
|
|
|
|
|
class Handler:
|
|
"""事件处理器类。支持依赖注入。"""
|
|
|
|
def __init__(
|
|
self,
|
|
call: Callable[..., Any],
|
|
*,
|
|
name: Optional[str] = None,
|
|
dependencies: Optional[List[DependsWrapper]] = None,
|
|
allow_types: Optional[List[Type[Param]]] = None,
|
|
):
|
|
"""
|
|
:说明:
|
|
|
|
装饰一个函数为事件处理器。
|
|
|
|
:参数:
|
|
|
|
* ``call: Callable[..., Any]``: 事件处理函数。
|
|
* ``name: Optional[str]``: 事件处理器名称。默认为函数名。
|
|
* ``dependencies: Optional[List[DependsWrapper]]``: 额外的非参数依赖注入。
|
|
* ``allow_types: Optional[List[Type[Param]]]``: 允许的参数类型。
|
|
"""
|
|
self.call = call
|
|
"""
|
|
:类型: ``Callable[..., Any]``
|
|
:说明: 事件处理函数
|
|
"""
|
|
self.name = get_name(call) if name is None else name
|
|
"""
|
|
:类型: ``str``
|
|
:说明: 事件处理函数名
|
|
"""
|
|
self.allow_types = allow_types or []
|
|
"""
|
|
:类型: ``List[Type[Param]]``
|
|
:说明: 事件处理器允许的参数类型
|
|
"""
|
|
|
|
self.dependencies = dependencies or []
|
|
"""
|
|
:类型: ``List[DependsWrapper]``
|
|
:说明: 事件处理器的额外依赖
|
|
"""
|
|
self.sub_dependents: Dict[Callable[..., Any], Dependent] = {}
|
|
if dependencies:
|
|
for depends in dependencies:
|
|
self.cache_dependent(depends)
|
|
self.dependent = get_dependent(call=call, allow_types=self.allow_types)
|
|
|
|
def __repr__(self) -> str:
|
|
return f"<Handler {self.name}({', '.join(map(str, self.dependent.params))})>"
|
|
|
|
def __str__(self) -> str:
|
|
return repr(self)
|
|
|
|
async def __call__(
|
|
self,
|
|
*,
|
|
_stack: Optional[AsyncExitStack] = None,
|
|
_dependency_cache: Optional[Dict[Callable[..., Any], Any]] = None,
|
|
**params,
|
|
) -> Any:
|
|
values, _ = await solve_dependencies(
|
|
_dependent=self.dependent,
|
|
_stack=_stack,
|
|
_sub_dependents=[
|
|
self.sub_dependents[dependency.dependency] # type: ignore
|
|
for dependency in self.dependencies
|
|
],
|
|
_dependency_cache=_dependency_cache,
|
|
**params,
|
|
)
|
|
|
|
if is_coroutine_callable(self.call):
|
|
return await self.call(**values)
|
|
else:
|
|
return await run_sync(self.call)(**values)
|
|
|
|
def cache_dependent(self, dependency: DependsWrapper):
|
|
if not dependency.dependency:
|
|
raise ValueError(f"{dependency} has no dependency")
|
|
if dependency.dependency in self.sub_dependents:
|
|
raise ValueError(f"{dependency} is already in dependencies")
|
|
sub_dependant = get_parameterless_sub_dependant(
|
|
depends=dependency, allow_types=self.allow_types
|
|
)
|
|
self.sub_dependents[dependency.dependency] = sub_dependant
|
|
|
|
def prepend_dependency(self, dependency: DependsWrapper):
|
|
self.cache_dependent(dependency)
|
|
self.dependencies.insert(0, dependency)
|
|
|
|
def append_dependency(self, dependency: DependsWrapper):
|
|
self.cache_dependent(dependency)
|
|
self.dependencies.append(dependency)
|
|
|
|
def remove_dependency(self, dependency: DependsWrapper):
|
|
if not dependency.dependency:
|
|
raise ValueError(f"{dependency} has no dependency")
|
|
if dependency.dependency in self.sub_dependents:
|
|
del self.sub_dependents[dependency.dependency]
|
|
if dependency in self.dependencies:
|
|
self.dependencies.remove(dependency)
|