mirror of
https://github.com/nonebot/nonebot2.git
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136 lines
3.9 KiB
Python
136 lines
3.9 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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import re
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import asyncio
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from itertools import product
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from pygtrie import CharTrie
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from nonebot import get_driver
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from nonebot.log import logger
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from nonebot.utils import run_sync
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from nonebot.typing import Bot, Any, Dict, Event, Union, Tuple, NoReturn, RuleChecker
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class Rule:
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__slots__ = ("checkers",)
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def __init__(self, *checkers: RuleChecker) -> None:
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self.checkers = list(checkers)
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async def __call__(self, bot: Bot, event: Event, state: dict) -> bool:
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results = await asyncio.gather(
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*map(lambda c: c(bot, event, state), self.checkers))
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return all(results)
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def __and__(self, other: Union["Rule", RuleChecker]) -> "Rule":
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checkers = [*self.checkers]
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if isinstance(other, Rule):
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checkers.extend(other.checkers)
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elif asyncio.iscoroutinefunction(other):
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checkers.append(other)
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else:
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checkers.append(run_sync(other))
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return Rule(*checkers)
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def __or__(self, other) -> NoReturn:
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raise RuntimeError("Or operation between rules is not allowed.")
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class TrieRule:
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prefix: CharTrie = CharTrie()
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suffix: CharTrie = CharTrie()
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@classmethod
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def add_prefix(cls, prefix: str, value: Any):
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if prefix in cls.prefix:
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logger.warning(f'Duplicated prefix rule "{prefix}"')
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return
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cls.prefix[prefix] = value
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@classmethod
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def add_suffix(cls, suffix: str, value: Any):
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if suffix[::-1] in cls.suffix:
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logger.warning(f'Duplicated suffix rule "{suffix}"')
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return
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cls.suffix[suffix[::-1]] = value
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@classmethod
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def get_value(cls, bot: Bot, event: Event,
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state: dict) -> Tuple[Dict[str, Any], Dict[str, Any]]:
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prefix = None
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suffix = None
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message = event.message[0]
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if message.type == "text":
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prefix = cls.prefix.longest_prefix(message.data["text"].lstrip())
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message_r = event.message[-1]
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if message_r.type == "text":
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suffix = cls.suffix.longest_prefix(
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message_r.data["text"].rstrip()[::-1])
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state["_prefix"] = {prefix.key: prefix.value} if prefix else {}
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state["_suffix"] = {suffix.key: suffix.value} if suffix else {}
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return ({
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prefix.key: prefix.value
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} if prefix else {}, {
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suffix.key: suffix.value
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} if suffix else {})
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def startswith(msg: str) -> Rule:
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TrieRule.add_prefix(msg, (msg,))
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async def _startswith(bot: Bot, event: Event, state: dict) -> bool:
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return msg in state["_prefix"]
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return Rule(_startswith)
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def endswith(msg: str) -> Rule:
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TrieRule.add_suffix(msg, (msg,))
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async def _endswith(bot: Bot, event: Event, state: dict) -> bool:
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return msg in state["_suffix"]
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return Rule(_endswith)
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def keyword(msg: str) -> Rule:
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async def _keyword(bot: Bot, event: Event, state: dict) -> bool:
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return bool(event.plain_text and msg in event.plain_text)
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return Rule(_keyword)
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def command(command: Tuple[str, ...]) -> Rule:
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config = get_driver().config
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command_start = config.command_start
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command_sep = config.command_sep
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for start, sep in product(command_start, command_sep):
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TrieRule.add_prefix(f"{start}{sep.join(command)}", command)
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async def _command(bot: Bot, event: Event, state: dict) -> bool:
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return command in state["_prefix"].values()
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return Rule(_command)
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def regex(regex: str, flags: Union[int, re.RegexFlag] = 0) -> Rule:
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pattern = re.compile(regex, flags)
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async def _regex(bot: Bot, event: Event, state: dict) -> bool:
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return bool(pattern.search(str(event.message)))
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return Rule(_regex)
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def to_me() -> Rule:
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async def _to_me(bot: Bot, event: Event, state: dict) -> bool:
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return bool(event.to_me)
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return Rule(_to_me)
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