调整目录结构，将框架内容放到base里面

base/plugin_common/event_system.py

@@ -0,0 +1,85 @@
+from enum import Enum, auto
+from typing import Dict, Any, Callable, List
+import threading
+
+
+class EventType(Enum):
+    """事件类型枚举"""
+    SYSTEM_STARTUP = auto()
+    SYSTEM_SHUTDOWN = auto()
+    PLUGIN_LOADED = auto()
+    PLUGIN_UNLOADED = auto()
+    MESSAGE_RECEIVED = auto()
+    MESSAGE_PROCESSED = auto()
+    CUSTOM_EVENT = auto()
+
+
+class EventSystem:
+    """事件系统，用于插件间通信"""
+    _instance = None
+    _lock = threading.Lock()
+    
+    def __new__(cls):
+        with cls._lock:
+            if cls._instance is None:
+                cls._instance = super(EventSystem, cls).__new__(cls)
+                cls._instance._subscribers = {}
+                cls._instance._initialized = False
+            return cls._instance
+    
+    def __init__(self):
+        if not self._initialized:
+            self._subscribers = {}
+            self._initialized = True
+    
+    def subscribe(self, event_type: EventType, callback: Callable[[Dict[str, Any]], None]) -> None:
+        """
+        订阅事件
+        
+        Args:
+            event_type: 事件类型
+            callback: 回调函数，接收事件数据
+        """
+        if event_type not in self._subscribers:
+            self._subscribers[event_type] = []
+        
+        if callback not in self._subscribers[event_type]:
+            self._subscribers[event_type].append(callback)
+    
+    def unsubscribe(self, event_type: EventType, callback: Callable[[Dict[str, Any]], None]) -> None:
+        """
+        取消订阅事件
+        
+        Args:
+            event_type: 事件类型
+            callback: 回调函数
+        """
+        if event_type in self._subscribers and callback in self._subscribers[event_type]:
+            self._subscribers[event_type].remove(callback)
+    
+    def publish(self, event_type: EventType, data: Dict[str, Any]) -> None:
+        """
+        发布事件
+        
+        Args:
+            event_type: 事件类型
+            data: 事件数据
+        """
+        if event_type in self._subscribers:
+            for callback in self._subscribers[event_type]:
+                try:
+                    callback(data)
+                except Exception as e:
+                    print(f"事件处理错误: {e}")
+    
+    def get_subscribers(self, event_type: EventType) -> List[Callable]:
+        """
+        获取事件订阅者
+        
+        Args:
+            event_type: 事件类型
+            
+        Returns:
+            订阅者列表
+        """
+        return self._subscribers.get(event_type, [])