314 lines
14 KiB
Python
314 lines
14 KiB
Python
import asyncio
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import contextlib
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from typing import List, Dict, Optional, Type, Tuple, Any, TYPE_CHECKING
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from src.chat.message_receive.message import MessageRecv
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from src.chat.message_receive.chat_stream import get_chat_manager
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from src.common.logger import get_logger
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from src.plugin_system.base.component_types import EventType, EventHandlerInfo, MaiMessages
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from src.plugin_system.base.base_events_handler import BaseEventHandler
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from .global_announcement_manager import global_announcement_manager
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if TYPE_CHECKING:
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from src.common.data_models.llm_data_model import LLMGenerationDataModel
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logger = get_logger("events_manager")
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class EventsManager:
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def __init__(self):
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# 有权重的 events 订阅者注册表
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self._events_subscribers: Dict[EventType, List[BaseEventHandler]] = {event: [] for event in EventType}
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self._handler_mapping: Dict[str, Type[BaseEventHandler]] = {} # 事件处理器映射表
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self._handler_tasks: Dict[str, List[asyncio.Task]] = {} # 事件处理器正在处理的任务
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def register_event_subscriber(self, handler_info: EventHandlerInfo, handler_class: Type[BaseEventHandler]) -> bool:
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"""注册事件处理器
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Args:
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handler_info (EventHandlerInfo): 事件处理器信息
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handler_class (Type[BaseEventHandler]): 事件处理器类
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Returns:
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bool: 是否注册成功
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"""
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handler_name = handler_info.name
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if handler_name in self._handler_mapping:
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logger.warning(f"事件处理器 {handler_name} 已存在，跳过注册")
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return False
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if not issubclass(handler_class, BaseEventHandler):
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logger.error(f"类 {handler_class.__name__} 不是 BaseEventHandler 的子类")
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return False
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self._handler_mapping[handler_name] = handler_class
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return self._insert_event_handler(handler_class, handler_info)
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def _prepare_message(
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self,
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event_type: EventType,
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message: Optional[MessageRecv] = None,
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llm_prompt: Optional[str] = None,
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llm_response: Optional["LLMGenerationDataModel"] = None,
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stream_id: Optional[str] = None,
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action_usage: Optional[List[str]] = None,
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) -> Optional[MaiMessages]:
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"""根据事件类型和输入，准备和转换消息对象。"""
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if message:
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return self._transform_event_message(message, llm_prompt, llm_response)
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if event_type not in [EventType.ON_START, EventType.ON_STOP]:
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assert stream_id, "如果没有消息，必须为非启动/关闭事件提供流ID"
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if event_type in [EventType.ON_MESSAGE, EventType.ON_PLAN, EventType.POST_LLM, EventType.AFTER_LLM]:
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return self._build_message_from_stream(stream_id, llm_prompt, llm_response)
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else:
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return self._transform_event_without_message(stream_id, llm_prompt, llm_response, action_usage)
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return None # ON_START, ON_STOP事件没有消息体
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def _dispatch_handler_task(self, handler: BaseEventHandler, message: Optional[MaiMessages]):
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"""分发一个非阻塞（异步）的事件处理任务。"""
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try:
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task = asyncio.create_task(handler.execute(message))
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task_name = f"{handler.plugin_name}-{handler.handler_name}"
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task.set_name(task_name)
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task.add_done_callback(self._task_done_callback)
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self._handler_tasks.setdefault(handler.handler_name, []).append(task)
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except Exception as e:
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logger.error(f"创建事件处理器任务 {handler.handler_name} 时发生异常: {e}", exc_info=True)
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async def _dispatch_intercepting_handler(self, handler: BaseEventHandler, message: Optional[MaiMessages]) -> bool:
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"""分发并等待一个阻塞（同步）的事件处理器，返回是否应继续处理。"""
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try:
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success, continue_processing, result = await handler.execute(message)
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if not success:
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logger.error(f"EventHandler {handler.handler_name} 执行失败: {result}")
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else:
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logger.debug(f"EventHandler {handler.handler_name} 执行成功: {result}")
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return continue_processing
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except Exception as e:
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logger.error(f"EventHandler {handler.handler_name} 发生异常: {e}", exc_info=True)
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return True # 发生异常时默认不中断其他处理
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async def handle_mai_events(
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self,
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event_type: EventType,
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message: Optional[MessageRecv] = None,
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llm_prompt: Optional[str] = None,
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llm_response: Optional["LLMGenerationDataModel"] = None,
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stream_id: Optional[str] = None,
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action_usage: Optional[List[str]] = None,
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) -> bool:
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"""
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处理所有事件，根据事件类型分发给订阅的处理器。
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"""
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from src.plugin_system.core import component_registry
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continue_flag = True
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# 1. 准备消息
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transformed_message = self._prepare_message(
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event_type, message, llm_prompt, llm_response, stream_id, action_usage
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)
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# 2. 获取并遍历处理器
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handlers = self._events_subscribers.get(event_type, [])
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if not handlers:
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return True
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current_stream_id = transformed_message.stream_id if transformed_message else None
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for handler in handlers:
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# 3. 前置检查和配置加载
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if (
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current_stream_id
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and handler.handler_name
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in global_announcement_manager.get_disabled_chat_event_handlers(current_stream_id)
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):
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continue
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# 统一加载插件配置
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plugin_config = component_registry.get_plugin_config(handler.plugin_name) or {}
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handler.set_plugin_config(plugin_config)
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# 4. 根据类型分发任务
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if handler.intercept_message:
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# 阻塞执行，并更新 continue_flag
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should_continue = await self._dispatch_intercepting_handler(handler, transformed_message)
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continue_flag = continue_flag and should_continue
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else:
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# 异步执行，不阻塞
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self._dispatch_handler_task(handler, transformed_message)
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return continue_flag
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def _insert_event_handler(self, handler_class: Type[BaseEventHandler], handler_info: EventHandlerInfo) -> bool:
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"""插入事件处理器到对应的事件类型列表中并设置其插件配置"""
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if handler_class.event_type == EventType.UNKNOWN:
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logger.error(f"事件处理器 {handler_class.__name__} 的事件类型未知，无法注册")
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return False
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handler_instance = handler_class()
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handler_instance.set_plugin_name(handler_info.plugin_name or "unknown")
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self._events_subscribers[handler_class.event_type].append(handler_instance)
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self._events_subscribers[handler_class.event_type].sort(key=lambda x: x.weight, reverse=True)
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return True
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def _remove_event_handler_instance(self, handler_class: Type[BaseEventHandler]) -> bool:
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"""从事件类型列表中移除事件处理器"""
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display_handler_name = handler_class.handler_name or handler_class.__name__
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if handler_class.event_type == EventType.UNKNOWN:
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logger.warning(f"事件处理器 {display_handler_name} 的事件类型未知，不存在于处理器列表中")
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return False
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handlers = self._events_subscribers[handler_class.event_type]
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for i, handler in enumerate(handlers):
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if isinstance(handler, handler_class):
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del handlers[i]
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logger.debug(f"事件处理器 {display_handler_name} 已移除")
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return True
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logger.warning(f"未找到事件处理器 {display_handler_name}，无法移除")
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return False
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def _transform_event_message(
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self, message: MessageRecv, llm_prompt: Optional[str] = None, llm_response: Optional["LLMGenerationDataModel"] = None
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) -> MaiMessages:
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"""转换事件消息格式"""
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# 直接赋值部分内容
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transformed_message = MaiMessages(
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llm_prompt=llm_prompt,
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llm_response_content=llm_response.content if llm_response else None,
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llm_response_reasoning=llm_response.reasoning if llm_response else None,
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llm_response_model=llm_response.model if llm_response else None,
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llm_response_tool_call=llm_response.tool_calls if llm_response else None,
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raw_message=message.raw_message,
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additional_data=message.message_info.additional_config or {},
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)
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# 消息段处理
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if message.message_segment.type == "seglist":
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transformed_message.message_segments = list(message.message_segment.data) # type: ignore
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else:
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transformed_message.message_segments = [message.message_segment]
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# stream_id 处理
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if hasattr(message, "chat_stream") and message.chat_stream:
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transformed_message.stream_id = message.chat_stream.stream_id
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# 处理后文本
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transformed_message.plain_text = message.processed_plain_text
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# 基本信息
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if hasattr(message, "message_info") and message.message_info:
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if message.message_info.platform:
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transformed_message.message_base_info["platform"] = message.message_info.platform
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if message.message_info.group_info:
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transformed_message.is_group_message = True
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transformed_message.message_base_info.update(
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{
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"group_id": message.message_info.group_info.group_id,
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"group_name": message.message_info.group_info.group_name,
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}
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)
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if message.message_info.user_info:
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if not transformed_message.is_group_message:
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transformed_message.is_private_message = True
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transformed_message.message_base_info.update(
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{
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"user_id": message.message_info.user_info.user_id,
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"user_cardname": message.message_info.user_info.user_cardname, # 用户群昵称
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"user_nickname": message.message_info.user_info.user_nickname, # 用户昵称（用户名）
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}
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)
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return transformed_message
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def _build_message_from_stream(
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self, stream_id: str, llm_prompt: Optional[str] = None, llm_response: Optional["LLMGenerationDataModel"] = None
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) -> MaiMessages:
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"""从流ID构建消息"""
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chat_stream = get_chat_manager().get_stream(stream_id)
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assert chat_stream, f"未找到流ID为 {stream_id} 的聊天流"
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message = chat_stream.context.get_last_message()
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return self._transform_event_message(message, llm_prompt, llm_response)
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def _transform_event_without_message(
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self,
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stream_id: str,
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llm_prompt: Optional[str] = None,
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llm_response: Optional["LLMGenerationDataModel"] = None,
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action_usage: Optional[List[str]] = None,
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) -> MaiMessages:
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"""没有message对象时进行转换"""
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chat_stream = get_chat_manager().get_stream(stream_id)
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assert chat_stream, f"未找到流ID为 {stream_id} 的聊天流"
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return MaiMessages(
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stream_id=stream_id,
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llm_prompt=llm_prompt,
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llm_response_content=(llm_response.content if llm_response else None),
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llm_response_reasoning=(llm_response.reasoning if llm_response else None),
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llm_response_model=(llm_response.model if llm_response else None),
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llm_response_tool_call=(llm_response.tool_calls if llm_response else None),
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is_group_message=(not (not chat_stream.group_info)),
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is_private_message=(not chat_stream.group_info),
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action_usage=action_usage,
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additional_data={"response_is_processed": True},
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)
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def _task_done_callback(self, task: asyncio.Task[Tuple[bool, bool, str | None]]):
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"""任务完成回调"""
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task_name = task.get_name() or "Unknown Task"
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try:
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success, _, result = task.result() # 忽略是否继续的标志，因为消息本身未被拦截
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if success:
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logger.debug(f"事件处理任务 {task_name} 已成功完成: {result}")
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else:
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logger.error(f"事件处理任务 {task_name} 执行失败: {result}")
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except asyncio.CancelledError:
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pass
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except Exception as e:
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logger.error(f"事件处理任务 {task_name} 发生异常: {e}")
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finally:
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with contextlib.suppress(ValueError, KeyError):
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self._handler_tasks[task_name].remove(task)
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async def cancel_handler_tasks(self, handler_name: str) -> None:
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tasks_to_be_cancelled = self._handler_tasks.get(handler_name, [])
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if remaining_tasks := [task for task in tasks_to_be_cancelled if not task.done()]:
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for task in remaining_tasks:
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task.cancel()
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try:
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await asyncio.wait_for(asyncio.gather(*remaining_tasks, return_exceptions=True), timeout=5)
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logger.info(f"已取消事件处理器 {handler_name} 的所有任务")
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except asyncio.TimeoutError:
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logger.warning(f"取消事件处理器 {handler_name} 的任务超时，开始强制取消")
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except Exception as e:
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logger.error(f"取消事件处理器 {handler_name} 的任务时发生异常: {e}")
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if handler_name in self._handler_tasks:
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del self._handler_tasks[handler_name]
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async def unregister_event_subscriber(self, handler_name: str) -> bool:
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"""取消注册事件处理器"""
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if handler_name not in self._handler_mapping:
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logger.warning(f"事件处理器 {handler_name} 不存在，无法取消注册")
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return False
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await self.cancel_handler_tasks(handler_name)
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handler_class = self._handler_mapping.pop(handler_name)
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if not self._remove_event_handler_instance(handler_class):
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return False
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logger.info(f"事件处理器 {handler_name} 已成功取消注册")
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return True
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events_manager = EventsManager()
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