mirror of
https://github.com/nonebot/nonebot2.git
synced 2024-12-05 03:24:53 +08:00
780 lines
28 KiB
Python
780 lines
28 KiB
Python
import re
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import shlex
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import asyncio
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import warnings
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from datetime import datetime
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from functools import partial, update_wrapper
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from typing import (Tuple, Union, Callable, Iterable, Any, Optional, List, Dict,
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Awaitable)
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from aiocqhttp import Event as CQEvent
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from nonebot import NoneBot, permission as perm
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from nonebot.command.argfilter import ValidateError
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from nonebot.helpers import context_id, send, render_expression
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from nonebot.log import logger
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from nonebot.message import Message
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from nonebot.session import BaseSession
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from nonebot.typing import (CommandName_T, CommandArgs_T, CommandHandler_T,
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Message_T, State_T, Filter_T)
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# key: context id
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# value: CommandSession object
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_sessions = {} # type: Dict[str, "CommandSession"]
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class Command:
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__slots__ = ('name', 'func', 'permission', 'only_to_me', 'privileged',
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'args_parser_func')
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def __init__(self, *, name: CommandName_T, func: CommandHandler_T,
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permission: int, only_to_me: bool, privileged: bool):
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self.name = name
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self.func = func
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self.permission = permission
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self.only_to_me = only_to_me
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self.privileged = privileged
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self.args_parser_func: Optional[CommandHandler_T] = None
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async def run(self, session, *, check_perm: bool = True,
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dry: bool = False) -> bool:
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"""
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Run the command in a given session.
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:param session: CommandSession object
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:param check_perm: should check permission before running
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:param dry: just check any prerequisite, without actually running
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:return: the command is finished (or can be run, given dry == True)
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"""
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has_perm = await self._check_perm(session) if check_perm else True
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if self.func and has_perm:
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if dry:
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return True
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if session.current_arg_filters is not None and \
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session.current_key is not None:
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# argument-level filters are given, use them
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arg = session.current_arg
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config = session.bot.config
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for f in session.current_arg_filters:
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try:
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res = f(arg)
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if isinstance(res, Awaitable):
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res = await res
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arg = res
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except ValidateError as e:
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# validation failed
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if config.MAX_VALIDATION_FAILURES > 0:
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# should check number of validation failures
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session.state['__validation_failure_num'] = \
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session.state.get(
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'__validation_failure_num', 0) + 1
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if session.state['__validation_failure_num'] >= \
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config.MAX_VALIDATION_FAILURES:
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# noinspection PyProtectedMember
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session.finish(
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render_expression(
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config.
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TOO_MANY_VALIDATION_FAILURES_EXPRESSION
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), **session._current_send_kwargs)
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failure_message = e.message
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if failure_message is None:
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failure_message = render_expression(
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config.DEFAULT_VALIDATION_FAILURE_EXPRESSION)
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# noinspection PyProtectedMember
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session.pause(failure_message,
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**session._current_send_kwargs)
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# passed all filters
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session.state[session.current_key] = arg
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else:
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# fallback to command-level args_parser_func
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if self.args_parser_func:
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await self.args_parser_func(session)
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if session.current_key is not None and \
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session.current_key not in session.state:
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# args_parser_func didn't set state, here we set it
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session.state[session.current_key] = session.current_arg
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await self.func(session)
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return True
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return False
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async def _check_perm(self, session) -> bool:
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"""
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Check if the session has sufficient permission to
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call the command.
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:param session: CommandSession object
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:return: the session has the permission
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"""
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return await perm.check_permission(session.bot, session.event,
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self.permission)
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def args_parser(self, parser_func: CommandHandler_T) -> CommandHandler_T:
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"""
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Decorator to register a function as the arguments parser of
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the corresponding command.
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"""
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self.args_parser_func = parser_func
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return parser_func
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def __repr__(self):
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return f'<Command, name={self.name.__repr__()}>'
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def __str__(self):
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return self.__repr__()
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class CommandManager:
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"""Global Command Manager"""
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_commands = {} # type: Dict[CommandName_T, Command]
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_aliases = {} # type: Dict[str, Command]
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_switches = {} # type: Dict[CommandName_T, bool]
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def __init__(self):
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self.commands = CommandManager._commands.copy()
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self.aliases = CommandManager._aliases.copy()
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self.switches = CommandManager._switches.copy()
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@classmethod
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def add_command(cls, cmd_name: CommandName_T, cmd: Command) -> None:
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"""Register a command
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Args:
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cmd_name (CommandName_T): Command name
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cmd (Command): Command object
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"""
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if cmd_name in cls._commands:
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warnings.warn(f"Command {cmd_name} already exists")
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return
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cls._switches[cmd_name] = True
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cls._commands[cmd_name] = cmd
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@classmethod
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def reload_command(cls, cmd_name: CommandName_T, cmd: Command) -> None:
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"""Reload a command
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**Warning! Dangerous function**
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Args:
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cmd_name (CommandName_T): Command name
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cmd (Command): Command object
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"""
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if cmd_name not in cls._commands:
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warnings.warn(
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f"Command {cmd_name} does not exist. Please use add_command instead"
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)
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return
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cls._commands[cmd_name] = cmd
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@classmethod
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def remove_command(cls, cmd_name: CommandName_T) -> bool:
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"""Remove a command
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**Warning! Dangerous function**
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Args:
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cmd_name (CommandName_T): Command name to remove
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Returns:
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bool: Success or not
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"""
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if cmd_name in cls._commands:
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del cls._commands[cmd_name]
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if cmd_name in cls._switches:
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del cls._switches[cmd_name]
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return True
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return False
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@classmethod
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def switch_command_global(cls,
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cmd_name: CommandName_T,
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state: Optional[bool] = None):
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"""Change command state globally or simply switch it if `state` is None
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Args:
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cmd_name (CommandName_T): Command name
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state (Optional[bool]): State to change to. Defaults to None.
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"""
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cls._switches[cmd_name] = not cls._switches[
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cmd_name] if state is None else bool(state)
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@classmethod
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def add_aliases(cls, aliases: Union[Iterable[str], str], cmd: Command):
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"""Register command alias(es)
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Args:
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aliases (Union[Iterable[str], str]): Command aliases
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cmd_name (Command): Command
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"""
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if isinstance(aliases, str):
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aliases = (aliases,)
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for alias in aliases:
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if not isinstance(alias, str):
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warnings.warn(f"Alias {alias} is not a string! Ignored")
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return
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elif alias in cls._aliases:
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warnings.warn(f"Alias {alias} already exists")
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return
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cls._aliases[alias] = cmd
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def _add_command_to_tree(self, cmd_name: CommandName_T, cmd: Command,
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tree: Dict[str, Union[Dict, Command]]) -> None:
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"""Add command to the target command tree.
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Args:
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cmd_name (CommandName_T): Name of the command
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cmd (Command): Command object
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tree (Dict[str, Union[Dict, Command]): Target command tree
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"""
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current_parent = tree
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for parent_key in cmd_name[:-1]:
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current_parent[parent_key] = current_parent.get(parent_key) or {}
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current_parent = current_parent[parent_key]
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# TODO: 支持test test.sub子命令
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if not isinstance(current_parent, dict):
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warnings.warn(f"{current_parent} is not a registry dict")
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return
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if cmd_name[-1] in current_parent:
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warnings.warn(f"There is already a command named {cmd_name}")
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return
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current_parent[cmd_name[-1]] = cmd
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def _generate_command_tree(self, commands: Dict[CommandName_T, Command]
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) -> Dict[str, Union[Dict, Command]]:
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"""Generate command tree from commands dictionary.
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Args:
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commands (Dict[CommandName_T, Command]): Dictionary of commands
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Returns:
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Dict[str, Union[Dict, "Command"]]: Command tree
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"""
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cmd_tree = {} #type: Dict[str, Union[Dict, "Command"]]
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for cmd_name, cmd in commands.items():
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self._add_command_to_tree(cmd_name, cmd, cmd_tree)
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return cmd_tree
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def _find_command(self,
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name: Union[str, CommandName_T]) -> Optional[Command]:
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cmd_name = (name,) if isinstance(name, str) else name
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if not cmd_name:
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return None
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cmd_tree = self._generate_command_tree({
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name: cmd
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for name, cmd in self.commands.items()
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if self.switches.get(name, True)
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})
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for part in cmd_name[:-1]:
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if part not in cmd_tree or not isinstance(
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cmd_tree[part], #type: ignore
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dict):
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return None
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cmd_tree = cmd_tree[part] # type: ignore
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cmd = cmd_tree.get(cmd_name[-1]) # type: ignore
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return cmd if isinstance(cmd, Command) else None
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def parse_command(self, bot: NoneBot, cmd_string: str
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) -> Tuple[Optional[Command], Optional[str]]:
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logger.debug(f'Parsing command: {repr(cmd_string)}')
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matched_start = None
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for start in bot.config.COMMAND_START:
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# loop through COMMAND_START to find the longest matched start
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curr_matched_start = None
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if isinstance(start, type(re.compile(''))):
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m = start.search(cmd_string)
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if m and m.start(0) == 0:
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curr_matched_start = m.group(0)
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elif isinstance(start, str):
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if cmd_string.startswith(start):
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curr_matched_start = start
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if curr_matched_start is not None and \
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(matched_start is None or
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len(curr_matched_start) > len(matched_start)):
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# a longer start, use it
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matched_start = curr_matched_start
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if matched_start is None:
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# it's not a command
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logger.debug('It\'s not a command')
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return None, None
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logger.debug(f'Matched command start: '
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f'{matched_start}{"(empty)" if not matched_start else ""}')
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full_command = cmd_string[len(matched_start):].lstrip()
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if not full_command:
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# command is empty
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return None, None
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cmd_name_text, *cmd_remained = full_command.split(maxsplit=1)
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cmd_name = None
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for sep in bot.config.COMMAND_SEP:
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# loop through COMMAND_SEP to find the most optimized split
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curr_cmd_name = None
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if isinstance(sep, type(re.compile(''))):
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curr_cmd_name = tuple(sep.split(cmd_name_text))
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elif isinstance(sep, str):
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curr_cmd_name = tuple(cmd_name_text.split(sep))
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if curr_cmd_name is not None and \
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(not cmd_name or len(curr_cmd_name) > len(cmd_name)):
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# a more optimized split, use it
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cmd_name = curr_cmd_name
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if not cmd_name:
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cmd_name = (cmd_name_text,)
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logger.debug(f'Split command name: {cmd_name}')
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cmd = self._find_command(cmd_name) # type: ignore
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if not cmd:
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logger.debug(f'Command {cmd_name} not found. Try to match aliases')
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cmd = self.aliases.get(cmd_name_text)
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if not cmd:
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return None, None
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logger.debug(f'Command {cmd.name} found, function: {cmd.func}')
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return cmd, ''.join(cmd_remained)
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def switch_command(self,
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cmd_name: CommandName_T,
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state: Optional[bool] = None):
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"""Change command state or simply switch it if `state` is None
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Args:
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cmd_name (CommandName_T): Command name
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state (Optional[bool]): State to change to. Defaults to None.
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"""
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self.switches[cmd_name] = not self.switches[
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cmd_name] if state is None else bool(state)
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class _PauseException(Exception):
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"""
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Raised by session.pause() indicating that the command session
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should be paused to ask the user for some arguments.
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"""
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pass
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class _FinishException(Exception):
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"""
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Raised by session.finish() indicating that the command session
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should be stopped and removed.
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"""
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def __init__(self, result: bool = True):
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"""
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:param result: succeeded to call the command
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"""
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self.result = result
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class SwitchException(Exception):
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"""
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Raised by session.switch() indicating that the command session
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should be stopped and replaced with a new one (going through
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handle_message() again).
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Since the new message will go through handle_message() again,
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the later function should be notified. So this exception is
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intended to be propagated to handle_message().
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"""
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def __init__(self, new_message: Message):
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"""
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:param new_message: new message which should be placed in event
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"""
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self.new_message = new_message
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class CommandSession(BaseSession):
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__slots__ = ('cmd', 'current_key', 'current_arg_filters',
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'_current_send_kwargs', 'current_arg', '_current_arg_text',
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'_current_arg_images', '_state', '_last_interaction',
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'_running', '_run_future')
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def __init__(self,
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bot: NoneBot,
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event: CQEvent,
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cmd: Command,
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*,
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current_arg: Optional[str] = '',
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args: Optional[CommandArgs_T] = None):
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super().__init__(bot, event)
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self.cmd = cmd # Command object
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# unique key of the argument that is currently requesting (asking)
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self.current_key: Optional[str] = None
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# initialize current argument filters
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self.current_arg_filters: Optional[List[Filter_T]] = None
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self._current_send_kwargs: Dict[str, Any] = {}
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# initialize current argument
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self.current_arg: Optional[str] = '' # with potential CQ codes
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self._current_arg_text = None
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self._current_arg_images = None
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self.refresh(event, current_arg=current_arg) # fill the above
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self._run_future = partial(asyncio.run_coroutine_threadsafe,
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loop=bot.loop)
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self._state: State_T = {}
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if args:
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self._state.update(args)
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self._last_interaction = None # last interaction time of this session
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self._running = False
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@property
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def state(self) -> State_T:
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"""
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State of the session.
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This contains all named arguments and
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other session scope temporary values.
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"""
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return self._state
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@property
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def args(self) -> CommandArgs_T:
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"""Deprecated. Use `session.state` instead."""
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return self.state
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@property
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def running(self) -> bool:
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return self._running
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@running.setter
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def running(self, value) -> None:
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if self._running is True and value is False:
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# change status from running to not running, record the time
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self._last_interaction = datetime.now()
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self._running = value
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@property
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def is_valid(self) -> bool:
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"""Check if the session is expired or not."""
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if self.bot.config.SESSION_EXPIRE_TIMEOUT and \
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self._last_interaction and \
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datetime.now() - self._last_interaction > \
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self.bot.config.SESSION_EXPIRE_TIMEOUT:
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return False
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return True
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@property
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def is_first_run(self) -> bool:
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return self._last_interaction is None
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@property
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def current_arg_text(self) -> str:
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"""
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Plain text part in the current argument, without any CQ codes.
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"""
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if self._current_arg_text is None:
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self._current_arg_text = Message(
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self.current_arg).extract_plain_text()
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return self._current_arg_text
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@property
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def current_arg_images(self) -> List[str]:
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"""
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Images (as list of urls) in the current argument.
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"""
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if self._current_arg_images is None:
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self._current_arg_images = [
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s.data['url']
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for s in Message(self.current_arg)
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if s.type == 'image' and 'url' in s.data
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]
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return self._current_arg_images
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@property
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def argv(self) -> List[str]:
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"""
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Shell-like argument list, similar to sys.argv.
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Only available while shell_like is True in on_command decorator.
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"""
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return self.state.get('argv', [])
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def refresh(self, event: CQEvent, *,
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current_arg: Optional[str] = '') -> None:
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"""
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Refill the session with a new message event.
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:param event: new message event
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:param current_arg: new command argument as a string
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"""
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self.event = event
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self.current_arg = current_arg
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self._current_arg_text = None
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self._current_arg_images = None
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def get(self,
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key: str,
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*,
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prompt: Optional[Message_T] = None,
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arg_filters: Optional[List[Filter_T]] = None,
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**kwargs) -> Any:
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"""
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Get an argument with a given key.
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If the argument does not exist in the current session,
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a pause exception will be raised, and the caller of
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the command will know it should keep the session for
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further interaction with the user.
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:param key: argument key
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|
:param prompt: prompt to ask the user
|
|
:param arg_filters: argument filters for the next user input
|
|
:return: the argument value
|
|
"""
|
|
if key in self.state:
|
|
return self.state[key]
|
|
|
|
self.current_key = key
|
|
self.current_arg_filters = arg_filters
|
|
self._current_send_kwargs = kwargs
|
|
self.pause(prompt, **kwargs)
|
|
|
|
def get_optional(self, key: str,
|
|
default: Optional[Any] = None) -> Optional[Any]:
|
|
"""
|
|
Simply get a argument with given key.
|
|
|
|
Deprecated. Use `session.state.get()` instead.
|
|
"""
|
|
return self.state.get(key, default)
|
|
|
|
def pause(self, message: Optional[Message_T] = None, **kwargs) -> None:
|
|
"""Pause the session for further interaction."""
|
|
if message:
|
|
self._run_future(self.send(message, **kwargs))
|
|
raise _PauseException
|
|
|
|
def finish(self, message: Optional[Message_T] = None, **kwargs) -> None:
|
|
"""Finish the session."""
|
|
if message:
|
|
self._run_future(self.send(message, **kwargs))
|
|
raise _FinishException
|
|
|
|
def switch(self, new_message: Message_T) -> None:
|
|
"""
|
|
Finish the session and switch to a new (fake) message event.
|
|
|
|
The user may send another command (or another intention as natural
|
|
language) when interacting with the current session. In this case,
|
|
the session may not understand what the user is saying, so it
|
|
should call this method and pass in that message, then NoneBot will
|
|
handle the situation properly.
|
|
"""
|
|
if self.is_first_run:
|
|
# if calling this method during first run,
|
|
# we think the command is not handled
|
|
raise _FinishException(result=False)
|
|
|
|
if not isinstance(new_message, Message):
|
|
new_message = Message(new_message)
|
|
raise SwitchException(new_message)
|
|
|
|
|
|
async def handle_command(bot: NoneBot, event: CQEvent,
|
|
manager: CommandManager) -> Optional[bool]:
|
|
"""
|
|
Handle a message as a command.
|
|
|
|
This function is typically called by "handle_message".
|
|
|
|
:param bot: NoneBot instance
|
|
:param event: message event
|
|
:param manager: command manager
|
|
:return: the message is handled as a command
|
|
"""
|
|
cmd, current_arg = manager.parse_command(bot, str(event.message).lstrip())
|
|
is_privileged_cmd = cmd and cmd.privileged
|
|
if is_privileged_cmd and cmd.only_to_me and not event['to_me']:
|
|
is_privileged_cmd = False
|
|
disable_interaction = bool(is_privileged_cmd)
|
|
|
|
if is_privileged_cmd:
|
|
logger.debug(f'Command {cmd.name} is a privileged command')
|
|
|
|
ctx_id = context_id(event)
|
|
|
|
if not is_privileged_cmd:
|
|
# wait for 1.5 seconds (at most) if the current session is running
|
|
retry = 5
|
|
while retry > 0 and \
|
|
_sessions.get(ctx_id) and _sessions[ctx_id].running:
|
|
retry -= 1
|
|
await asyncio.sleep(0.3)
|
|
|
|
check_perm = True
|
|
session = _sessions.get(ctx_id) if not is_privileged_cmd else None
|
|
if session:
|
|
if session.running:
|
|
logger.warning(f'There is a session of command '
|
|
f'{session.cmd.name} running, notify the user')
|
|
asyncio.ensure_future(
|
|
send(bot, event,
|
|
render_expression(bot.config.SESSION_RUNNING_EXPRESSION)))
|
|
# pretend we are successful, so that NLP won't handle it
|
|
return True
|
|
|
|
if session.is_valid:
|
|
logger.debug(f'Session of command {session.cmd.name} exists')
|
|
# since it's in a session, the user must be talking to me
|
|
event['to_me'] = True
|
|
session.refresh(event, current_arg=str(event['message']))
|
|
# there is no need to check permission for existing session
|
|
check_perm = False
|
|
else:
|
|
# the session is expired, remove it
|
|
logger.debug(f'Session of command {session.cmd.name} is expired')
|
|
if ctx_id in _sessions:
|
|
del _sessions[ctx_id]
|
|
session = None
|
|
|
|
if not session:
|
|
if not cmd:
|
|
logger.debug('Not a known command, ignored')
|
|
return False
|
|
if cmd.only_to_me and not event['to_me']:
|
|
logger.debug('Not to me, ignored')
|
|
return False
|
|
session = CommandSession(bot, event, cmd, current_arg=current_arg)
|
|
logger.debug(f'New session of command {session.cmd.name} created')
|
|
|
|
return await _real_run_command(session,
|
|
ctx_id,
|
|
check_perm=check_perm,
|
|
disable_interaction=disable_interaction)
|
|
|
|
|
|
async def call_command(bot: NoneBot,
|
|
event: CQEvent,
|
|
name: Union[str, CommandName_T],
|
|
*,
|
|
current_arg: str = '',
|
|
args: Optional[CommandArgs_T] = None,
|
|
check_perm: bool = True,
|
|
disable_interaction: bool = False) -> Optional[bool]:
|
|
"""
|
|
Call a command internally.
|
|
|
|
This function is typically called by some other commands
|
|
or "handle_natural_language" when handling NLPResult object.
|
|
|
|
Note: If disable_interaction is not True, after calling this function,
|
|
any previous command session will be overridden, even if the command
|
|
being called here does not need further interaction (a.k.a asking
|
|
the user for more info).
|
|
|
|
:param bot: NoneBot instance
|
|
:param event: message event
|
|
:param name: command name
|
|
:param current_arg: command current argument string
|
|
:param args: command args
|
|
:param check_perm: should check permission before running command
|
|
:param disable_interaction: disable the command's further interaction
|
|
:return: the command is successfully called
|
|
"""
|
|
cmd = CommandManager()._find_command(name)
|
|
if not cmd:
|
|
return False
|
|
session = CommandSession(bot,
|
|
event,
|
|
cmd,
|
|
current_arg=current_arg,
|
|
args=args)
|
|
return await _real_run_command(session,
|
|
context_id(session.event),
|
|
check_perm=check_perm,
|
|
disable_interaction=disable_interaction)
|
|
|
|
|
|
async def _real_run_command(session: CommandSession,
|
|
ctx_id: str,
|
|
disable_interaction: bool = False,
|
|
**kwargs) -> Optional[bool]:
|
|
if not disable_interaction:
|
|
# override session only when interaction is not disabled
|
|
_sessions[ctx_id] = session
|
|
try:
|
|
logger.debug(f'Running command {session.cmd.name}')
|
|
session.running = True
|
|
future = asyncio.ensure_future(session.cmd.run(session, **kwargs))
|
|
timeout = None
|
|
if session.bot.config.SESSION_RUN_TIMEOUT:
|
|
timeout = session.bot.config.SESSION_RUN_TIMEOUT.total_seconds()
|
|
|
|
try:
|
|
await asyncio.wait_for(future, timeout)
|
|
handled = future.result()
|
|
except asyncio.TimeoutError:
|
|
handled = True
|
|
except (_PauseException, _FinishException, SwitchException) as e:
|
|
raise e
|
|
except Exception as e:
|
|
logger.error(f'An exception occurred while '
|
|
f'running command {session.cmd.name}:')
|
|
logger.exception(e)
|
|
handled = True
|
|
raise _FinishException(handled)
|
|
except _PauseException:
|
|
session.running = False
|
|
if disable_interaction:
|
|
# if the command needs further interaction, we view it as failed
|
|
return False
|
|
logger.debug(f'Further interaction needed for '
|
|
f'command {session.cmd.name}')
|
|
# return True because this step of the session is successful
|
|
return True
|
|
except (_FinishException, SwitchException) as e:
|
|
session.running = False
|
|
logger.debug(f'Session of command {session.cmd.name} finished')
|
|
if not disable_interaction and ctx_id in _sessions:
|
|
# the command is finished, remove the session,
|
|
# but if interaction is disabled during this command call,
|
|
# we leave the _sessions untouched.
|
|
del _sessions[ctx_id]
|
|
|
|
if isinstance(e, _FinishException):
|
|
return e.result
|
|
elif isinstance(e, SwitchException):
|
|
# we are guaranteed that the session is not first run here,
|
|
# which means interaction is definitely enabled,
|
|
# so we can safely touch _sessions here.
|
|
if ctx_id in _sessions:
|
|
# make sure there is no session waiting
|
|
del _sessions[ctx_id]
|
|
logger.debug(f'Session of command {session.cmd.name} switching, '
|
|
f'new message: {e.new_message}')
|
|
raise e # this is intended to be propagated to handle_message()
|
|
|
|
|
|
def kill_current_session(event: CQEvent) -> None:
|
|
"""
|
|
Force kill current session of the given event context,
|
|
despite whether it is running or not.
|
|
|
|
:param event: message event
|
|
"""
|
|
ctx_id = context_id(event)
|
|
if ctx_id in _sessions:
|
|
del _sessions[ctx_id]
|
|
|
|
|
|
from nonebot.command.group import CommandGroup
|