添加mem0的实现

backend/open_webui/memory/mem0.py

@@ -1,4 +1,12 @@
 
+from mem0 import MemoryClient
+import os
+from logging import getLogger
+log = getLogger(__name__)
+
+mem0_api_key = os.getenv("MEM0_API_KEY")
+memory_client = MemoryClient(api_key=mem0_api_key)
+
 async def mem0_search(user_id: str, chat_id: str, last_message: str) -> list[str]:
     """
     预留的 Mem0 检索接口：当前为占位实现。
@@ -7,11 +15,14 @@ async def mem0_search(user_id: str, chat_id: str, last_message: str) -> list[str
     """
     try:
         # TODO: 接入真实 Mem0 检索
-        print("mem0_search")
-        print("user_id:", user_id)
-        print("chat_id:", chat_id)
-        print("last_message:", last_message)
-        return []
+        log.info(f"mem0_search called with user_id: {user_id}, chat_id: {chat_id}, last_message: {last_message}")
+        serach_rst = memory_client.search(
+        query=last_message, 
+       filters={"user_id": user_id}
+    )
+        memories=serach_rst["results"] if "results" in serach_rst else serach_rst
+        log.info(f"mem0_search found {len(memories)} memories")
+        return [mem["text"] for mem in memories]
     except Exception as e:
         log.debug(f"Mem0 search failed: {e}")
         return []
@@ -24,9 +35,10 @@ async def mem0_delete(user_id: str, chat_id: str) -> bool:
     """
     try:
         # TODO: 接入真实删除逻辑（如按 chat_id 过滤）
-        print("mem0_delete")
-        print("user_id:", user_id)
-        print("chat_id:", chat_id)
+        log.info(f"mem0_delete called with user_id: {user_id}, chat_id: {chat_id}")
+        memory_client.delete(
+            filters={"user_id": user_id}
+        )
         return True
     except Exception as e:
         log.debug(f"Mem0 delete failed: {e}")