import asyncio import contextlib from typing import List, Dict, Optional, Type, Tuple, Any, Coroutine from src.chat.message_receive.message import MessageRecv from src.chat.message_receive.chat_stream import get_chat_manager from src.common.logger import get_logger from src.plugin_system.base.component_types import EventType, EventHandlerInfo, MaiMessages from src.plugin_system.base.base_events_handler import BaseEventHandler from .global_announcement_manager import global_announcement_manager logger = get_logger("events_manager") class EventsManager: def __init__(self): # 有权重的 events 订阅者注册表 self._events_subscribers: Dict[EventType, List[BaseEventHandler]] = {event: [] for event in EventType} self._handler_mapping: Dict[str, Type[BaseEventHandler]] = {} # 事件处理器映射表 self._handler_tasks: Dict[str, List[asyncio.Task]] = {} # 事件处理器正在处理的任务 def register_event_subscriber(self, handler_info: EventHandlerInfo, handler_class: Type[BaseEventHandler]) -> bool: """注册事件处理器 Args: handler_info (EventHandlerInfo): 事件处理器信息 handler_class (Type[BaseEventHandler]): 事件处理器类 Returns: bool: 是否注册成功 """ handler_name = handler_info.name if handler_name in self._handler_mapping: logger.warning(f"事件处理器 {handler_name} 已存在，跳过注册") return False if not issubclass(handler_class, BaseEventHandler): logger.error(f"类 {handler_class.__name__} 不是 BaseEventHandler 的子类") return False self._handler_mapping[handler_name] = handler_class return self._insert_event_handler(handler_class, handler_info) def _task_done_callback(self, task: asyncio.Task): """统一处理异步任务完成后的回调，例如记录异常。""" try: task.result() except asyncio.CancelledError: logger.warning(f"任务 {task.get_name()} 被取消。") except Exception as e: logger.error(f"异步事件处理器任务 {task.get_name()} 发生未捕获异常: {e}", exc_info=True) def _prepare_message( self, event_type: EventType, message: Optional[MessageRecv] = None, llm_prompt: Optional[str] = None, llm_response: Optional[Dict[str, Any]] = None, stream_id: Optional[str] = None, action_usage: Optional[List[str]] = None, ) -> Optional[MaiMessages]: """根据事件类型和输入，准备和转换消息对象。""" if message: return self._transform_event_message(message, llm_prompt, llm_response) if event_type not in [EventType.ON_START, EventType.ON_STOP]: assert stream_id, "如果没有消息，必须为非启动/关闭事件提供流ID" if event_type in [EventType.ON_MESSAGE, EventType.ON_PLAN, EventType.POST_LLM, EventType.AFTER_LLM]: return self._build_message_from_stream(stream_id, llm_prompt, llm_response) else: return self._transform_event_without_message(stream_id, llm_prompt, llm_response, action_usage) return None # ON_START, ON_STOP事件没有消息体 def _execute_handler( self, handler: BaseEventHandler, message: Optional[MaiMessages] ) -> Coroutine[Any, Any, tuple[bool, bool, Any]]: """封装了调用 handler.execute 的逻辑。""" if message: return handler.execute(message) return handler.execute() # 适用于 ON_START, ON_STOP def _dispatch_handler_task(self, handler: BaseEventHandler, message: Optional[MaiMessages]): """分发一个非阻塞（异步）的事件处理任务。""" try: # 无论是否有 message，都统一调用 coro = self._execute_handler(handler, message) task = asyncio.create_task(coro) task_name = f"{handler.plugin_name}-{handler.handler_name}" task.set_name(task_name) task.add_done_callback(self._task_done_callback) self._handler_tasks.setdefault(handler.handler_name, []).append(task) except Exception as e: logger.error(f"创建事件处理器任务 {handler.handler_name} 时发生异常: {e}", exc_info=True) async def _dispatch_intercepting_handler( self, handler: BaseEventHandler, message: Optional[MaiMessages] ) -> bool: """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。""" try: # 统一调用 success, continue_processing, result = await self._execute_handler(handler, message) if not success: logger.error(f"EventHandler {handler.handler_name} 执行失败: {result}") else: logger.debug(f"EventHandler {handler.handler_name} 执行成功: {result}") return continue_processing except Exception as e: logger.error(f"EventHandler {handler.handler_name} 发生异常: {e}", exc_info=True) return True # 发生异常时默认不中断其他处理 async def handle_mai_events( self, event_type: EventType, message: Optional[MessageRecv] = None, llm_prompt: Optional[str] = None, llm_response: Optional[Dict[str, Any]] = None, stream_id: Optional[str] = None, action_usage: Optional[List[str]] = None, ) -> bool: """ 处理所有事件，根据事件类型分发给订阅的处理器。 """ from src.plugin_system.core import component_registry continue_flag = True # 1. 准备消息 transformed_message = self._prepare_message( event_type, message, llm_prompt, llm_response, stream_id, action_usage ) # 2. 获取并遍历处理器 handlers = self._events_subscribers.get(event_type, []) if not handlers: return True current_stream_id = transformed_message.stream_id if transformed_message else None for handler in handlers: # 3. 前置检查和配置加载 if current_stream_id and handler.handler_name in global_announcement_manager.get_disabled_chat_event_handlers(current_stream_id): continue # 统一加载插件配置 plugin_config = component_registry.get_plugin_config(handler.plugin_name) or {} handler.set_plugin_config(plugin_config) # 4. 根据类型分发任务 if handler.intercept_message: # 阻塞执行，并更新 continue_flag should_continue = await self._dispatch_intercepting_handler(handler, transformed_message) continue_flag = continue_flag and should_continue else: # 异步执行，不阻塞 self._dispatch_handler_task(handler, transformed_message) return continue_flag def _insert_event_handler(self, handler_class: Type[BaseEventHandler], handler_info: EventHandlerInfo) -> bool: """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""" if handler_class.event_type == EventType.UNKNOWN: logger.error(f"事件处理器 {handler_class.__name__} 的事件类型未知，无法注册") return False handler_instance = handler_class() handler_instance.set_plugin_name(handler_info.plugin_name or "unknown") self._events_subscribers[handler_class.event_type].append(handler_instance) self._events_subscribers[handler_class.event_type].sort(key=lambda x: x.weight, reverse=True) return True def _remove_event_handler_instance(self, handler_class: Type[BaseEventHandler]) -> bool: """从事件类型列表中移除事件处理器""" display_handler_name = handler_class.handler_name or handler_class.__name__ if handler_class.event_type == EventType.UNKNOWN: 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") return False handlers = self._events_subscribers[handler_class.event_type] for i, handler in enumerate(handlers): if isinstance(handler, handler_class): del handlers[i] logger.debug(f"事件处理器 {display_handler_name} 已移除") return True logger.warning(f"未找到事件处理器 {display_handler_name}，无法移除") return False def _transform_event_message( self, message: MessageRecv, llm_prompt: Optional[str] = None, llm_response: Optional[Dict[str, Any]] = None ) -> MaiMessages: """转换事件消息格式""" # 直接赋值部分内容 transformed_message = MaiMessages( llm_prompt=llm_prompt, llm_response_content=llm_response.get("content") if llm_response else None, llm_response_reasoning=llm_response.get("reasoning") if llm_response else None, llm_response_model=llm_response.get("model") if llm_response else None, llm_response_tool_call=llm_response.get("tool_calls") if llm_response else None, raw_message=message.raw_message, additional_data=message.message_info.additional_config or {}, ) # 消息段处理 if message.message_segment.type == "seglist": transformed_message.message_segments = list(message.message_segment.data) # type: ignore else: transformed_message.message_segments = [message.message_segment] # stream_id 处理 if hasattr(message, "chat_stream") and message.chat_stream: transformed_message.stream_id = message.chat_stream.stream_id # 处理后文本 transformed_message.plain_text = message.processed_plain_text # 基本信息 if hasattr(message, "message_info") and message.message_info: if message.message_info.platform: transformed_message.message_base_info["platform"] = message.message_info.platform if message.message_info.group_info: transformed_message.is_group_message = True transformed_message.message_base_info.update( { "group_id": message.message_info.group_info.group_id, "group_name": message.message_info.group_info.group_name, } ) if message.message_info.user_info: if not transformed_message.is_group_message: transformed_message.is_private_message = True transformed_message.message_base_info.update( { "user_id": message.message_info.user_info.user_id, "user_cardname": message.message_info.user_info.user_cardname, # 用户群昵称 "user_nickname": message.message_info.user_info.user_nickname, # 用户昵称（用户名） } ) return transformed_message def _build_message_from_stream( self, stream_id: str, llm_prompt: Optional[str] = None, llm_response: Optional[Dict[str, Any]] = None ) -> MaiMessages: """从流ID构建消息""" chat_stream = get_chat_manager().get_stream(stream_id) assert chat_stream, f"未找到流ID为 {stream_id} 的聊天流" message = chat_stream.context.get_last_message() return self._transform_event_message(message, llm_prompt, llm_response) def _transform_event_without_message( self, stream_id: str, llm_prompt: Optional[str] = None, llm_response: Optional[Dict[str, Any]] = None, action_usage: Optional[List[str]] = None, ) -> MaiMessages: """没有message对象时进行转换""" chat_stream = get_chat_manager().get_stream(stream_id) assert chat_stream, f"未找到流ID为 {stream_id} 的聊天流" return MaiMessages( stream_id=stream_id, llm_prompt=llm_prompt, llm_response_content=(llm_response.get("content") if llm_response else None), llm_response_reasoning=(llm_response.get("reasoning") if llm_response else None), llm_response_model=llm_response.get("model") if llm_response else None, llm_response_tool_call=(llm_response.get("tool_calls") if llm_response else None), is_group_message=(not (not chat_stream.group_info)), is_private_message=(not chat_stream.group_info), action_usage=action_usage, additional_data={"response_is_processed": True}, ) def _task_done_callback(self, task: asyncio.Task[Tuple[bool, bool, str | None]]): """任务完成回调""" task_name = task.get_name() or "Unknown Task" try: success, _, result = task.result() # 忽略是否继续的标志，因为消息本身未被拦截 if success: logger.debug(f"事件处理任务 {task_name} 已成功完成: {result}") else: logger.error(f"事件处理任务 {task_name} 执行失败: {result}") except asyncio.CancelledError: pass except Exception as e: logger.error(f"事件处理任务 {task_name} 发生异常: {e}") finally: with contextlib.suppress(ValueError, KeyError): self._handler_tasks[task_name].remove(task) async def cancel_handler_tasks(self, handler_name: str) -> None: tasks_to_be_cancelled = self._handler_tasks.get(handler_name, []) if remaining_tasks := [task for task in tasks_to_be_cancelled if not task.done()]: for task in remaining_tasks: task.cancel() try: await asyncio.wait_for(asyncio.gather(*remaining_tasks, return_exceptions=True), timeout=5) logger.info(f"已取消事件处理器 {handler_name} 的所有任务") except asyncio.TimeoutError: logger.warning(f"取消事件处理器 {handler_name} 的任务超时，开始强制取消") except Exception as e: logger.error(f"取消事件处理器 {handler_name} 的任务时发生异常: {e}") if handler_name in self._handler_tasks: del self._handler_tasks[handler_name] async def unregister_event_subscriber(self, handler_name: str) -> bool: """取消注册事件处理器""" if handler_name not in self._handler_mapping: logger.warning(f"事件处理器 {handler_name} 不存在，无法取消注册") return False await self.cancel_handler_tasks(handler_name) handler_class = self._handler_mapping.pop(handler_name) if not self._remove_event_handler_instance(handler_class): return False logger.info(f"事件处理器 {handler_name} 已成功取消注册") return True events_manager = EventsManager()