mirror of
https://github.com/nonebot/nonebot2.git
synced 2024-11-24 00:55:07 +08:00
505 lines
14 KiB
Python
505 lines
14 KiB
Python
r"""
|
||
规则
|
||
====
|
||
|
||
每个事件响应器 ``Matcher`` 拥有一个匹配规则 ``Rule`` ，其中是 ``RuleChecker`` 的集合，只有当所有 ``RuleChecker`` 检查结果为 ``True`` 时继续运行。
|
||
|
||
\:\:\:tip 提示
|
||
``RuleChecker`` 既可以是 async function 也可以是 sync function
|
||
\:\:\:
|
||
"""
|
||
|
||
import re
|
||
import shlex
|
||
import asyncio
|
||
from itertools import product
|
||
from argparse import Namespace
|
||
from contextlib import AsyncExitStack
|
||
from typing_extensions import TypedDict
|
||
from argparse import ArgumentParser as ArgParser
|
||
from typing import Any, Set, List, Tuple, Union, NoReturn, Optional, Sequence
|
||
|
||
from pygtrie import CharTrie
|
||
|
||
from nonebot.log import logger
|
||
from nonebot import params, get_driver
|
||
from nonebot.dependencies import Dependent
|
||
from nonebot.exception import ParserExit, SkippedException
|
||
from nonebot.adapters import Bot, Event, Message, MessageSegment
|
||
from nonebot.typing import T_State, T_Handler, T_RuleChecker, T_DependencyCache
|
||
from nonebot.consts import (
|
||
CMD_KEY,
|
||
PREFIX_KEY,
|
||
REGEX_DICT,
|
||
SHELL_ARGS,
|
||
SHELL_ARGV,
|
||
CMD_ARG_KEY,
|
||
RAW_CMD_KEY,
|
||
REGEX_GROUP,
|
||
REGEX_MATCHED,
|
||
)
|
||
|
||
CMD_RESULT = TypedDict(
|
||
"CMD_RESULT",
|
||
{
|
||
"command": Optional[Tuple[str, ...]],
|
||
"raw_command": Optional[str],
|
||
"command_arg": Optional[Message[MessageSegment]],
|
||
},
|
||
)
|
||
|
||
|
||
class Rule:
|
||
"""
|
||
:说明:
|
||
|
||
``Matcher`` 规则类，当事件传递时，在 ``Matcher`` 运行前进行检查。
|
||
|
||
:示例:
|
||
|
||
.. code-block:: python
|
||
|
||
Rule(async_function) & sync_function
|
||
# 等价于
|
||
from nonebot.utils import run_sync
|
||
Rule(async_function, run_sync(sync_function))
|
||
"""
|
||
|
||
__slots__ = ("checkers",)
|
||
|
||
HANDLER_PARAM_TYPES = [
|
||
params.DependParam,
|
||
params.BotParam,
|
||
params.EventParam,
|
||
params.StateParam,
|
||
params.DefaultParam,
|
||
]
|
||
|
||
def __init__(self, *checkers: Union[T_RuleChecker, Dependent[bool]]) -> None:
|
||
"""
|
||
:参数:
|
||
|
||
* ``*checkers: Union[T_RuleChecker, Dependent[bool]]``: RuleChecker
|
||
|
||
"""
|
||
self.checkers: Set[Dependent[bool]] = set(
|
||
checker
|
||
if isinstance(checker, Dependent)
|
||
else Dependent[bool](call=checker, allow_types=self.HANDLER_PARAM_TYPES)
|
||
for checker in checkers
|
||
)
|
||
"""
|
||
:说明:
|
||
|
||
存储 ``RuleChecker``
|
||
|
||
:类型:
|
||
|
||
* ``Set[Dependent[bool]]``
|
||
"""
|
||
|
||
async def __call__(
|
||
self,
|
||
bot: Bot,
|
||
event: Event,
|
||
state: T_State,
|
||
stack: Optional[AsyncExitStack] = None,
|
||
dependency_cache: Optional[T_DependencyCache] = None,
|
||
) -> bool:
|
||
"""
|
||
:说明:
|
||
|
||
检查是否符合所有规则
|
||
|
||
:参数:
|
||
|
||
* ``bot: Bot``: Bot 对象
|
||
* ``event: Event``: Event 对象
|
||
* ``state: T_State``: 当前 State
|
||
* ``stack: Optional[AsyncExitStack]``: 异步上下文栈
|
||
* ``dependency_cache: Optional[CacheDict[T_Handler, Any]]``: 依赖缓存
|
||
|
||
:返回:
|
||
|
||
- ``bool``
|
||
"""
|
||
if not self.checkers:
|
||
return True
|
||
try:
|
||
results = await asyncio.gather(
|
||
*(
|
||
checker(
|
||
bot=bot,
|
||
event=event,
|
||
state=state,
|
||
stack=stack,
|
||
dependency_cache=dependency_cache,
|
||
)
|
||
for checker in self.checkers
|
||
)
|
||
)
|
||
except SkippedException:
|
||
return False
|
||
return all(results)
|
||
|
||
def __and__(self, other: Optional[Union["Rule", T_RuleChecker]]) -> "Rule":
|
||
if other is None:
|
||
return self
|
||
elif isinstance(other, Rule):
|
||
return Rule(*self.checkers, *other.checkers)
|
||
else:
|
||
return Rule(*self.checkers, other)
|
||
|
||
def __or__(self, other) -> NoReturn:
|
||
raise RuntimeError("Or operation between rules is not allowed.")
|
||
|
||
|
||
class TrieRule:
|
||
prefix: CharTrie = CharTrie()
|
||
|
||
@classmethod
|
||
def add_prefix(cls, prefix: str, value: Any):
|
||
if prefix in cls.prefix:
|
||
logger.warning(f'Duplicated prefix rule "{prefix}"')
|
||
return
|
||
cls.prefix[prefix] = value
|
||
|
||
@classmethod
|
||
def get_value(cls, bot: Bot, event: Event, state: T_State) -> CMD_RESULT:
|
||
prefix = CMD_RESULT(command=None, raw_command=None, command_arg=None)
|
||
state[PREFIX_KEY] = prefix
|
||
if event.get_type() != "message":
|
||
return prefix
|
||
|
||
message = event.get_message()
|
||
message_seg: MessageSegment = message[0]
|
||
if message_seg.is_text():
|
||
segment_text = str(message_seg).lstrip()
|
||
pf = cls.prefix.longest_prefix(segment_text)
|
||
prefix[RAW_CMD_KEY] = pf.key
|
||
prefix[CMD_KEY] = pf.value
|
||
if pf.key:
|
||
msg = message.copy()
|
||
msg.pop(0)
|
||
new_message = msg.__class__(segment_text[len(pf.key) :].lstrip())
|
||
for new_segment in reversed(new_message):
|
||
msg.insert(0, new_segment)
|
||
prefix[CMD_ARG_KEY] = msg
|
||
|
||
return prefix
|
||
|
||
|
||
class Startswith:
|
||
def __init__(self, msg: Tuple[str, ...], ignorecase: bool = False):
|
||
self.msg = msg
|
||
self.ignorecase = ignorecase
|
||
|
||
async def __call__(self, event: Event) -> Any:
|
||
if event.get_type() != "message":
|
||
return False
|
||
text = event.get_plaintext()
|
||
return bool(
|
||
re.match(
|
||
f"^(?:{'|'.join(re.escape(prefix) for prefix in self.msg)})",
|
||
text,
|
||
re.IGNORECASE if self.ignorecase else 0,
|
||
)
|
||
)
|
||
|
||
|
||
def startswith(msg: Union[str, Tuple[str, ...]], ignorecase: bool = False) -> Rule:
|
||
"""
|
||
:说明:
|
||
|
||
匹配消息开头
|
||
|
||
:参数:
|
||
|
||
* ``msg: str``: 消息开头字符串
|
||
"""
|
||
if isinstance(msg, str):
|
||
msg = (msg,)
|
||
|
||
return Rule(Startswith(msg, ignorecase))
|
||
|
||
|
||
class Endswith:
|
||
def __init__(self, msg: Tuple[str, ...], ignorecase: bool = False):
|
||
self.msg = msg
|
||
self.ignorecase = ignorecase
|
||
|
||
async def __call__(self, event: Event) -> Any:
|
||
if event.get_type() != "message":
|
||
return False
|
||
text = event.get_plaintext()
|
||
return bool(
|
||
re.search(
|
||
f"(?:{'|'.join(re.escape(prefix) for prefix in self.msg)})$",
|
||
text,
|
||
re.IGNORECASE if self.ignorecase else 0,
|
||
)
|
||
)
|
||
|
||
|
||
def endswith(msg: Union[str, Tuple[str, ...]], ignorecase: bool = False) -> Rule:
|
||
"""
|
||
:说明:
|
||
|
||
匹配消息结尾
|
||
|
||
:参数:
|
||
|
||
* ``msg: str``: 消息结尾字符串
|
||
"""
|
||
if isinstance(msg, str):
|
||
msg = (msg,)
|
||
|
||
return Rule(Endswith(msg, ignorecase))
|
||
|
||
|
||
class Keywords:
|
||
def __init__(self, *keywords: str):
|
||
self.keywords = keywords
|
||
|
||
async def __call__(self, bot: Bot, event: Event, state: T_State) -> bool:
|
||
if event.get_type() != "message":
|
||
return False
|
||
text = event.get_plaintext()
|
||
return bool(text and any(keyword in text for keyword in self.keywords))
|
||
|
||
|
||
def keyword(*keywords: str) -> Rule:
|
||
"""
|
||
:说明:
|
||
|
||
匹配消息关键词
|
||
|
||
:参数:
|
||
|
||
* ``*keywords: str``: 关键词
|
||
"""
|
||
|
||
return Rule(Keywords(*keywords))
|
||
|
||
|
||
class Command:
|
||
def __init__(self, cmds: List[Tuple[str, ...]]):
|
||
self.cmds = cmds
|
||
|
||
async def __call__(self, state: T_State) -> bool:
|
||
return state[PREFIX_KEY][CMD_KEY] in self.cmds
|
||
|
||
def __repr__(self):
|
||
return f"<Command {self.cmds}>"
|
||
|
||
|
||
def command(*cmds: Union[str, Tuple[str, ...]]) -> Rule:
|
||
r"""
|
||
:说明:
|
||
|
||
命令形式匹配，根据配置里提供的 ``command_start``, ``command_sep`` 判断消息是否为命令。
|
||
|
||
可以通过 ``state["_prefix"]["command"]`` 获取匹配成功的命令（例：``("test",)``），通过 ``state["_prefix"]["raw_command"]`` 获取匹配成功的原始命令文本（例：``"/test"``）。
|
||
|
||
:参数:
|
||
|
||
* ``*cmds: Union[str, Tuple[str, ...]]``: 命令内容
|
||
|
||
:示例:
|
||
|
||
使用默认 ``command_start``, ``command_sep`` 配置
|
||
|
||
命令 ``("test",)`` 可以匹配：``/test`` 开头的消息
|
||
命令 ``("test", "sub")`` 可以匹配”``/test.sub`` 开头的消息
|
||
|
||
\:\:\:tip 提示
|
||
命令内容与后续消息间无需空格！
|
||
\:\:\:
|
||
"""
|
||
|
||
config = get_driver().config
|
||
command_start = config.command_start
|
||
command_sep = config.command_sep
|
||
commands: List[Tuple[str, ...]] = []
|
||
for command in cmds:
|
||
if isinstance(command, str):
|
||
command = (command,)
|
||
|
||
commands.append(command)
|
||
|
||
if len(command) == 1:
|
||
for start in command_start:
|
||
TrieRule.add_prefix(f"{start}{command[0]}", command)
|
||
else:
|
||
for start, sep in product(command_start, command_sep):
|
||
TrieRule.add_prefix(f"{start}{sep.join(command)}", command)
|
||
|
||
return Rule(Command(commands))
|
||
|
||
|
||
class ArgumentParser(ArgParser):
|
||
"""
|
||
:说明:
|
||
|
||
``shell_like`` 命令参数解析器，解析出错时不会退出程序。
|
||
"""
|
||
|
||
def _print_message(self, message, file=None):
|
||
old_message: str = getattr(self, "message", "")
|
||
if old_message:
|
||
old_message += "\n"
|
||
old_message += message
|
||
setattr(self, "message", old_message)
|
||
|
||
def exit(self, status: int = 0, message: Optional[str] = None):
|
||
raise ParserExit(
|
||
status=status, message=message or getattr(self, "message", None)
|
||
)
|
||
|
||
def parse_args(
|
||
self,
|
||
args: Optional[Sequence[str]] = None,
|
||
namespace: Optional[Namespace] = None,
|
||
) -> Namespace:
|
||
setattr(self, "message", "")
|
||
return super().parse_args(args=args, namespace=namespace) # type: ignore
|
||
|
||
|
||
class ShellCommand:
|
||
def __init__(self, cmds: List[Tuple[str, ...]], parser: Optional[ArgumentParser]):
|
||
self.cmds = cmds
|
||
self.parser = parser
|
||
|
||
async def __call__(self, event: Event, state: T_State) -> bool:
|
||
if state[PREFIX_KEY][CMD_KEY] in self.cmds:
|
||
message = str(event.get_message())
|
||
strip_message = message[len(state[PREFIX_KEY][RAW_CMD_KEY]) :].lstrip()
|
||
state[SHELL_ARGV] = shlex.split(strip_message)
|
||
if self.parser:
|
||
try:
|
||
args = self.parser.parse_args(state[SHELL_ARGV])
|
||
state[SHELL_ARGS] = args
|
||
except ParserExit as e:
|
||
state[SHELL_ARGS] = e
|
||
return True
|
||
else:
|
||
return False
|
||
|
||
|
||
def shell_command(
|
||
*cmds: Union[str, Tuple[str, ...]], parser: Optional[ArgumentParser] = None
|
||
) -> Rule:
|
||
r"""
|
||
:说明:
|
||
|
||
支持 ``shell_like`` 解析参数的命令形式匹配，根据配置里提供的 ``command_start``, ``command_sep`` 判断消息是否为命令。
|
||
|
||
可以通过 ``state["_prefix"]["command"]`` 获取匹配成功的命令（例：``("test",)``），通过 ``state["_prefix"]["raw_command"]`` 获取匹配成功的原始命令文本（例：``"/test"``）。
|
||
|
||
可以通过 ``state["argv"]`` 获取用户输入的原始参数列表
|
||
|
||
添加 ``parser`` 参数后, 可以自动处理消息并将结果保存在 ``state["args"]`` 中。
|
||
|
||
:参数:
|
||
|
||
* ``*cmds: Union[str, Tuple[str, ...]]``: 命令内容
|
||
* ``parser: Optional[ArgumentParser]``: ``nonebot.rule.ArgumentParser`` 对象
|
||
|
||
:示例:
|
||
|
||
使用默认 ``command_start``, ``command_sep`` 配置，更多示例参考 ``argparse`` 标准库文档。
|
||
|
||
.. code-block:: python
|
||
|
||
from nonebot.rule import ArgumentParser
|
||
|
||
parser = ArgumentParser()
|
||
parser.add_argument("-a", action="store_true")
|
||
|
||
rule = shell_command("ls", parser=parser)
|
||
|
||
\:\:\:tip 提示
|
||
命令内容与后续消息间无需空格！
|
||
\:\:\:
|
||
"""
|
||
if parser is not None and not isinstance(parser, ArgumentParser):
|
||
raise TypeError("`parser` must be an instance of nonebot.rule.ArgumentParser")
|
||
|
||
config = get_driver().config
|
||
command_start = config.command_start
|
||
command_sep = config.command_sep
|
||
commands: List[Tuple[str, ...]] = []
|
||
for command in cmds:
|
||
if isinstance(command, str):
|
||
command = (command,)
|
||
|
||
commands.append(command)
|
||
|
||
if len(command) == 1:
|
||
for start in command_start:
|
||
TrieRule.add_prefix(f"{start}{command[0]}", command)
|
||
else:
|
||
for start, sep in product(command_start, command_sep):
|
||
TrieRule.add_prefix(f"{start}{sep.join(command)}", command)
|
||
|
||
return Rule(ShellCommand(commands, parser))
|
||
|
||
|
||
class Regex:
|
||
def __init__(self, regex: str, flags: int = 0):
|
||
self.regex = regex
|
||
self.flags = flags
|
||
|
||
async def __call__(self, event: Event, state: T_State) -> bool:
|
||
if event.get_type() != "message":
|
||
return False
|
||
matched = re.search(self.regex, str(event.get_message()), self.flags)
|
||
if matched:
|
||
state[REGEX_MATCHED] = matched.group()
|
||
state[REGEX_GROUP] = matched.groups()
|
||
state[REGEX_DICT] = matched.groupdict()
|
||
return True
|
||
else:
|
||
return False
|
||
|
||
|
||
def regex(regex: str, flags: Union[int, re.RegexFlag] = 0) -> Rule:
|
||
r"""
|
||
:说明:
|
||
|
||
根据正则表达式进行匹配。
|
||
|
||
可以通过 ``state["_matched"]`` ``state["_matched_groups"]`` ``state["_matched_dict"]``
|
||
获取正则表达式匹配成功的文本。
|
||
|
||
:参数:
|
||
|
||
* ``regex: str``: 正则表达式
|
||
* ``flags: Union[int, re.RegexFlag]``: 正则标志
|
||
|
||
\:\:\:tip 提示
|
||
正则表达式匹配使用 search 而非 match，如需从头匹配请使用 ``r"^xxx"`` 来确保匹配开头
|
||
\:\:\:
|
||
"""
|
||
|
||
return Rule(Regex(regex, flags))
|
||
|
||
|
||
class ToMe:
|
||
async def __call__(self, event: Event) -> bool:
|
||
return event.is_tome()
|
||
|
||
|
||
def to_me() -> Rule:
|
||
"""
|
||
:说明:
|
||
|
||
通过 ``event.is_tome()`` 判断事件是否与机器人有关
|
||
|
||
:参数:
|
||
|
||
* 无
|
||
"""
|
||
|
||
return Rule(ToMe())
|