重构代码，统一config配置

backend/app/nodes/summarize.py

@@ -0,0 +1,87 @@
+"""
+记忆存储节点模块
+负责将对话历史提交给 Mem0 进行事实提取和存储
+"""
+
+from typing import Any, Dict
+
+# 本地模块
+from ..graph.state import MessagesState
+from ..memory.mem0_client import Mem0Client
+from ..utils.logging import log_state_change
+from ..logger import debug, info, error, warning
+
+def create_summarize_node(mem0_client: Mem0Client):
+    """
+    工厂函数：创建记忆存储节点
+    
+    Args:
+        mem0_client: Mem0 客户端实例
+        
+    Returns:
+        异步节点函数
+    """
+    
+    from langchain_core.runnables.config import RunnableConfig
+    
+    async def summarize_conversation(state: MessagesState, config: RunnableConfig) -> Dict[str, Any]:
+        """
+        记忆存储节点 - 使用 Mem0
+        
+        Args:
+            state: 当前对话状态
+            config: 运行时配置
+            
+        Returns:
+            重置计数器的状态更新
+        """
+        log_state_change("summarize", state, "进入")
+
+        messages = state["messages"]
+        if len(messages) < 4:
+            debug("📝 [记忆添加] 对话过短，跳过")
+            return {"turns_since_last_summary": 0}
+
+        # 从 metadata 中获取 user_id
+        user_id = config.get("metadata", {}).get("user_id", "default_user")
+
+        # 确保 Mem0 已初始化（懒加载）
+        if not mem0_client._initialized:
+            await mem0_client.initialize()
+
+        # 将整个对话历史转换为 Mem0 需要的消息格式
+        mem0_messages = []
+        for msg in messages:
+            # 兼容 dict 和对象两种格式
+            if isinstance(msg, dict):
+                msg_type = msg.get("type", "")
+                msg_content = msg.get("content", "")
+            else:
+                msg_type = getattr(msg, 'type', '')
+                msg_content = getattr(msg, 'content', '')
+            
+            if msg_type == "human":
+                mem0_messages.append({"role": "user", "content": msg_content})
+            elif msg_type == "ai":
+                mem0_messages.append({"role": "assistant", "content": msg_content})
+            elif msg_type == "tool":
+                mem0_messages.append({"role": "system", "content": f"[工具返回] {msg_content}"})
+
+        if mem0_client.mem0:
+            try:
+                # 异步调用 Mem0 自动提取并存储事实
+                success = await mem0_client.add_memories(
+                    mem0_messages,
+                    user_id=user_id
+                )
+                if success:
+                    info(f"📝 [记忆添加] 已提交给 Mem0 进行事实提取")
+            except Exception as e:
+                error(f"❌ Mem0 记忆添加失败: {e}")
+        else:
+            warning("⚠️ Mem0 未初始化，跳过记忆添加")
+
+        log_state_change("summarize", state, "离开")
+        return {"turns_since_last_summary": 0}
+    
+    return summarize_conversation