nonebot2/nonebot/plugin.py

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"""
插件
====
NoneBot 插件开发提供便携的定义函数
"""
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import re
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import sys
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import pkgutil
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import importlib
from dataclasses import dataclass
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from importlib._bootstrap import _load
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from contextvars import Context, ContextVar, copy_context
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from nonebot.log import logger
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from nonebot.matcher import Matcher
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from nonebot.permission import Permission
from nonebot.typing import Handler, RuleChecker
from nonebot.rule import Rule, startswith, endswith, keyword, command, regex
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from nonebot.typing import Any, Set, List, Dict, Type, Tuple, Union, Optional, ModuleType
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plugins: Dict[str, "Plugin"] = {}
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"""
:类型: ``Dict[str, Plugin]``
:说明: 已加载的插件
"""
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_tmp_matchers: ContextVar[Set[Type[Matcher]]] = ContextVar("_tmp_matchers")
_export: ContextVar["Export"] = ContextVar("_export")
class Export(dict):
"""
:说明:
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插件导出内容以使得其他插件可以获得
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:示例:
.. code-block:: python
nonebot.export().default = "bar"
@nonebot.export()
def some_function():
pass
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# this doesn't work before python 3.9
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# use
# export = nonebot.export(); @export.sub
# instead
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# See also PEP-614: https://www.python.org/dev/peps/pep-0614/
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@nonebot.export().sub
def something_else():
pass
"""
def __call__(self, func, **kwargs):
self[func.__name__] = func
self.update(kwargs)
return func
def __setitem__(self, key, value):
super().__setitem__(key,
Export(value) if isinstance(value, dict) else value)
def __setattr__(self, name, value):
self[name] = Export(value) if isinstance(value, dict) else value
def __getattr__(self, name):
if name not in self:
self[name] = Export()
return self[name]
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@dataclass(eq=False)
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class Plugin(object):
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"""存储插件信息"""
name: str
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"""
- **类型**: ``str``
- **说明**: 插件名称使用 文件/文件夹 名称作为插件名
"""
module: ModuleType
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"""
- **类型**: ``ModuleType``
- **说明**: 插件模块对象
"""
matcher: Set[Type[Matcher]]
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"""
- **类型**: ``Set[Type[Matcher]]``
- **说明**: 插件内定义的 ``Matcher``
"""
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export: Export
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"""
- **类型**: ``Export``
- **说明**: 插件内定义的导出内容
"""
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def on(type: str = "",
rule: Optional[Union[Rule, RuleChecker]] = None,
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permission: Optional[Permission] = None,
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*,
handlers: Optional[List[Handler]] = None,
temp: bool = False,
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priority: int = 1,
block: bool = False,
state: Optional[dict] = None) -> Type[Matcher]:
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"""
:说明:
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注册一个基础事件响应器可自定义类型
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:参数:
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* ``type: str``: 事件响应器类型
* ``rule: Optional[Union[Rule, RuleChecker]]``: 事件响应规则
* ``permission: Optional[Permission]``: 事件响应权限
* ``handlers: Optional[List[Handler]]``: 事件处理函数列表
* ``temp: bool``: 是否为临时事件响应器仅执行一次
* ``priority: int``: 事件响应器优先级
* ``block: bool``: 是否阻止事件向更低优先级传递
* ``state: Optional[dict]``: 默认的 state
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:返回:
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- ``Type[Matcher]``
"""
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matcher = Matcher.new(type,
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Rule() & rule,
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permission or Permission(),
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temp=temp,
priority=priority,
block=block,
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handlers=handlers,
default_state=state)
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_tmp_matchers.get().add(matcher)
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return matcher
def on_metaevent(rule: Optional[Union[Rule, RuleChecker]] = None,
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*,
handlers: Optional[List[Handler]] = None,
temp: bool = False,
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priority: int = 1,
block: bool = False,
state: Optional[dict] = None) -> Type[Matcher]:
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"""
:说明:
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注册一个元事件响应器
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:参数:
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* ``rule: Optional[Union[Rule, RuleChecker]]``: 事件响应规则
* ``handlers: Optional[List[Handler]]``: 事件处理函数列表
* ``temp: bool``: 是否为临时事件响应器仅执行一次
* ``priority: int``: 事件响应器优先级
* ``block: bool``: 是否阻止事件向更低优先级传递
* ``state: Optional[dict]``: 默认的 state
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:返回:
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- ``Type[Matcher]``
"""
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matcher = Matcher.new("meta_event",
Rule() & rule,
Permission(),
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temp=temp,
priority=priority,
block=block,
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handlers=handlers,
default_state=state)
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_tmp_matchers.get().add(matcher)
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return matcher
def on_message(rule: Optional[Union[Rule, RuleChecker]] = None,
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permission: Optional[Permission] = None,
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*,
handlers: Optional[List[Handler]] = None,
temp: bool = False,
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priority: int = 1,
block: bool = True,
state: Optional[dict] = None) -> Type[Matcher]:
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"""
:说明:
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注册一个消息事件响应器
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:参数:
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* ``rule: Optional[Union[Rule, RuleChecker]]``: 事件响应规则
* ``permission: Optional[Permission]``: 事件响应权限
* ``handlers: Optional[List[Handler]]``: 事件处理函数列表
* ``temp: bool``: 是否为临时事件响应器仅执行一次
* ``priority: int``: 事件响应器优先级
* ``block: bool``: 是否阻止事件向更低优先级传递
* ``state: Optional[dict]``: 默认的 state
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:返回:
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- ``Type[Matcher]``
"""
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matcher = Matcher.new("message",
Rule() & rule,
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permission or Permission(),
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temp=temp,
priority=priority,
block=block,
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handlers=handlers,
default_state=state)
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_tmp_matchers.get().add(matcher)
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return matcher
def on_notice(rule: Optional[Union[Rule, RuleChecker]] = None,
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*,
handlers: Optional[List[Handler]] = None,
temp: bool = False,
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priority: int = 1,
block: bool = False,
state: Optional[dict] = None) -> Type[Matcher]:
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"""
:说明:
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注册一个通知事件响应器
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:参数:
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* ``rule: Optional[Union[Rule, RuleChecker]]``: 事件响应规则
* ``handlers: Optional[List[Handler]]``: 事件处理函数列表
* ``temp: bool``: 是否为临时事件响应器仅执行一次
* ``priority: int``: 事件响应器优先级
* ``block: bool``: 是否阻止事件向更低优先级传递
* ``state: Optional[dict]``: 默认的 state
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:返回:
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- ``Type[Matcher]``
"""
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matcher = Matcher.new("notice",
Rule() & rule,
Permission(),
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temp=temp,
priority=priority,
block=block,
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handlers=handlers,
default_state=state)
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_tmp_matchers.get().add(matcher)
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return matcher
def on_request(rule: Optional[Union[Rule, RuleChecker]] = None,
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*,
handlers: Optional[List[Handler]] = None,
temp: bool = False,
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priority: int = 1,
block: bool = False,
state: Optional[dict] = None) -> Type[Matcher]:
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"""
:说明:
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注册一个请求事件响应器
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:参数:
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* ``rule: Optional[Union[Rule, RuleChecker]]``: 事件响应规则
* ``handlers: Optional[List[Handler]]``: 事件处理函数列表
* ``temp: bool``: 是否为临时事件响应器仅执行一次
* ``priority: int``: 事件响应器优先级
* ``block: bool``: 是否阻止事件向更低优先级传递
* ``state: Optional[dict]``: 默认的 state
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:返回:
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- ``Type[Matcher]``
"""
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matcher = Matcher.new("request",
Rule() & rule,
Permission(),
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temp=temp,
priority=priority,
block=block,
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handlers=handlers,
default_state=state)
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_tmp_matchers.get().add(matcher)
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return matcher
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def on_startswith(msg: str,
rule: Optional[Optional[Union[Rule, RuleChecker]]] = None,
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**kwargs) -> Type[Matcher]:
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"""
:说明:
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注册一个消息事件响应器并且当消息的**文本部分**以指定内容开头时响应
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:参数:
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* ``msg: str``: 指定消息开头内容
* ``rule: Optional[Union[Rule, RuleChecker]]``: 事件响应规则
* ``permission: Optional[Permission]``: 事件响应权限
* ``handlers: Optional[List[Handler]]``: 事件处理函数列表
* ``temp: bool``: 是否为临时事件响应器仅执行一次
* ``priority: int``: 事件响应器优先级
* ``block: bool``: 是否阻止事件向更低优先级传递
* ``state: Optional[dict]``: 默认的 state
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:返回:
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- ``Type[Matcher]``
"""
return on_message(startswith(msg) & rule, **kwargs)
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def on_endswith(msg: str,
rule: Optional[Optional[Union[Rule, RuleChecker]]] = None,
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**kwargs) -> Type[Matcher]:
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"""
:说明:
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注册一个消息事件响应器并且当消息的**文本部分**以指定内容结尾时响应
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:参数:
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* ``msg: str``: 指定消息结尾内容
* ``rule: Optional[Union[Rule, RuleChecker]]``: 事件响应规则
* ``permission: Optional[Permission]``: 事件响应权限
* ``handlers: Optional[List[Handler]]``: 事件处理函数列表
* ``temp: bool``: 是否为临时事件响应器仅执行一次
* ``priority: int``: 事件响应器优先级
* ``block: bool``: 是否阻止事件向更低优先级传递
* ``state: Optional[dict]``: 默认的 state
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:返回:
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- ``Type[Matcher]``
"""
return on_message(endswith(msg) & rule, **kwargs)
def on_keyword(keywords: Set[str],
rule: Optional[Union[Rule, RuleChecker]] = None,
**kwargs) -> Type[Matcher]:
"""
:说明:
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注册一个消息事件响应器并且当消息纯文本部分包含关键词时响应
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:参数:
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* ``keywords: Set[str]``: 关键词列表
* ``rule: Optional[Union[Rule, RuleChecker]]``: 事件响应规则
* ``permission: Optional[Permission]``: 事件响应权限
* ``handlers: Optional[List[Handler]]``: 事件处理函数列表
* ``temp: bool``: 是否为临时事件响应器仅执行一次
* ``priority: int``: 事件响应器优先级
* ``block: bool``: 是否阻止事件向更低优先级传递
* ``state: Optional[dict]``: 默认的 state
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:返回:
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- ``Type[Matcher]``
"""
return on_message(keyword(*keywords) & rule, **kwargs)
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def on_command(cmd: Union[str, Tuple[str, ...]],
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rule: Optional[Union[Rule, RuleChecker]] = None,
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aliases: Optional[Set[Union[str, Tuple[str, ...]]]] = None,
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**kwargs) -> Type[Matcher]:
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"""
:说明:
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注册一个消息事件响应器并且当消息以指定命令开头时响应
命令匹配规则参考: `命令形式匹配 <rule.html#command-command>`_
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:参数:
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* ``cmd: Union[str, Tuple[str, ...]]``: 指定命令内容
* ``rule: Optional[Union[Rule, RuleChecker]]``: 事件响应规则
* ``aliases: Optional[Set[Union[str, Tuple[str, ...]]]]``: 命令别名
* ``permission: Optional[Permission]``: 事件响应权限
* ``handlers: Optional[List[Handler]]``: 事件处理函数列表
* ``temp: bool``: 是否为临时事件响应器仅执行一次
* ``priority: int``: 事件响应器优先级
* ``block: bool``: 是否阻止事件向更低优先级传递
* ``state: Optional[dict]``: 默认的 state
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:返回:
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- ``Type[Matcher]``
"""
async def _strip_cmd(bot, event, state: dict):
message = event.message
event.message = message.__class__(
str(message)[len(state["_prefix"]["raw_command"]):].strip())
handlers = kwargs.pop("handlers", [])
handlers.insert(0, _strip_cmd)
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commands = set([cmd]) | (aliases or set())
return on_message(command(*commands) & rule, handlers=handlers, **kwargs)
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def on_regex(pattern: str,
flags: Union[int, re.RegexFlag] = 0,
rule: Optional[Rule] = None,
**kwargs) -> Type[Matcher]:
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"""
:说明:
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注册一个消息事件响应器并且当消息匹配正则表达式时响应
命令匹配规则参考: `正则匹配 <rule.html#regex-regex-flags-0>`_
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:参数:
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* ``pattern: str``: 正则表达式
* ``flags: Union[int, re.RegexFlag]``: 正则匹配标志
* ``rule: Optional[Union[Rule, RuleChecker]]``: 事件响应规则
* ``permission: Optional[Permission]``: 事件响应权限
* ``handlers: Optional[List[Handler]]``: 事件处理函数列表
* ``temp: bool``: 是否为临时事件响应器仅执行一次
* ``priority: int``: 事件响应器优先级
* ``block: bool``: 是否阻止事件向更低优先级传递
* ``state: Optional[dict]``: 默认的 state
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:返回:
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- ``Type[Matcher]``
"""
return on_message(regex(pattern, flags) & rule, **kwargs)
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class CommandGroup:
"""命令组,用于声明一组有相同名称前缀的命令。"""
def __init__(self, cmd: Union[str, Tuple[str, ...]], **kwargs):
"""
:参数:
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* ``cmd: Union[str, Tuple[str, ...]]``: 命令前缀
* ``**kwargs``: 其他传递给 ``on_command`` 的参数默认值参考 `on_command <#on-command-cmd-rule-none-aliases-none-kwargs>`_
"""
self.basecmd: Tuple[str, ...] = (cmd,) if isinstance(cmd, str) else cmd
"""
- **类型**: ``Tuple[str, ...]``
- **说明**: 命令前缀
"""
if "aliases" in kwargs:
del kwargs["aliases"]
self.base_kwargs: Dict[str, Any] = kwargs
"""
- **类型**: ``Dict[str, Any]``
- **说明**: 其他传递给 ``on_command`` 的参数默认值
"""
def command(self, cmd: Union[str, Tuple[str, ...]],
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**kwargs) -> Type[Matcher]:
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"""
:说明:
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注册一个新的命令
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:参数:
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* ``cmd: Union[str, Tuple[str, ...]]``: 命令前缀
* ``**kwargs``: 其他传递给 ``on_command`` 的参数将会覆盖命令组默认值
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:返回:
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- ``Type[Matcher]``
"""
sub_cmd = (cmd,) if isinstance(cmd, str) else cmd
cmd = self.basecmd + sub_cmd
final_kwargs = self.base_kwargs.copy()
final_kwargs.update(kwargs)
return on_command(cmd, **final_kwargs)
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def load_plugin(module_path: str) -> Optional[Plugin]:
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"""
:说明:
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使用 ``importlib`` 加载单个插件可以是本地插件或是通过 ``pip`` 安装的插件
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:参数:
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* ``module_path: str``: 插件名称 ``path.to.your.plugin``
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:返回:
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- ``Optional[Plugin]``
"""
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def _load_plugin(module_path: str) -> Optional[Plugin]:
try:
_tmp_matchers.set(set())
_export.set(Export())
if module_path in plugins:
return plugins[module_path]
elif module_path in sys.modules:
logger.warning(
f"Module {module_path} has been loaded by other plugins! Ignored"
)
return
module = importlib.import_module(module_path)
for m in _tmp_matchers.get():
m.module = module_path
plugin = Plugin(module_path, module, _tmp_matchers.get(),
_export.get())
plugins[module_path] = plugin
logger.opt(
colors=True).info(f'Succeeded to import "<y>{module_path}</y>"')
return plugin
except Exception as e:
logger.opt(colors=True, exception=e).error(
f'<r><bg #f8bbd0>Failed to import "{module_path}"</bg #f8bbd0></r>'
)
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return None
context: Context = copy_context()
return context.run(_load_plugin, module_path)
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def load_plugins(*plugin_dir: str) -> Set[Plugin]:
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"""
:说明:
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导入目录下多个插件 ``_`` 开头的插件不会被导入
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:参数:
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- ``*plugin_dir: str``: 插件路径
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:返回:
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- ``Set[Plugin]``
"""
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def _load_plugin(module_info) -> Optional[Plugin]:
_tmp_matchers.set(set())
_export.set(Export())
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name = module_info.name
if name.startswith("_"):
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return
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spec = module_info.module_finder.find_spec(name, None)
if spec.name in plugins:
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return
elif spec.name in sys.modules:
logger.warning(
f"Module {spec.name} has been loaded by other plugin! Ignored")
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return
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try:
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module = _load(spec)
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for m in _tmp_matchers.get():
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m.module = name
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plugin = Plugin(name, module, _tmp_matchers.get(), _export.get())
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plugins[name] = plugin
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logger.opt(colors=True).info(f'Succeeded to import "<y>{name}</y>"')
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return plugin
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except Exception as e:
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logger.opt(colors=True, exception=e).error(
f'<r><bg #f8bbd0>Failed to import "{name}"</bg #f8bbd0></r>')
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return None
loaded_plugins = set()
for module_info in pkgutil.iter_modules(plugin_dir):
context: Context = copy_context()
result = context.run(_load_plugin, module_info)
if result:
loaded_plugins.add(result)
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return loaded_plugins
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def load_builtin_plugins() -> Optional[Plugin]:
"""
:说明:
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导入 NoneBot 内置插件
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:返回:
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- ``Plugin``
"""
return load_plugin("nonebot.plugins.base")
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def get_plugin(name: str) -> Optional[Plugin]:
"""
:说明:
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获取当前导入的某个插件
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:参数:
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* ``name: str``: 插件名 ``load_plugin`` 参数一致如果为 ``load_plugins`` 导入的插件则为文件()
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:返回:
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- ``Optional[Plugin]``
"""
return plugins.get(name)
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def get_loaded_plugins() -> Set[Plugin]:
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"""
:说明:
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获取当前已导入的所有插件
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:返回:
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- ``Set[Plugin]``
"""
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return set(plugins.values())
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def export() -> Export:
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"""
:说明:
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获取插件的导出内容对象
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:返回:
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- ``Export``
"""
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return _export.get()
def require(name: str) -> Optional[Export]:
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"""
:说明:
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获取一个插件的导出内容
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:参数:
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* ``name: str``: 插件名 ``load_plugin`` 参数一致如果为 ``load_plugins`` 导入的插件则为文件()
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:返回:
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- ``Optional[Export]``
"""
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plugin = get_plugin(name)
return plugin.export if plugin else None