enh: get_last_user_message_item

backend/utils/misc.py

@@ -8,9 +8,17 @@ import uuid
 import time
 
 
-def get_last_user_message(messages: List[dict]) -> str:
+def get_last_user_message_item(messages: List[dict]) -> str:
     for message in reversed(messages):
         if message["role"] == "user":
+            return message
+    return None
+
+
+def get_last_user_message(messages: List[dict]) -> str:
+    message = get_last_user_message_item(messages)
+
+    if message is not None:
         if isinstance(message["content"], list):
             for item in message["content"]:
                 if item["type"] == "text":