learn progress

Html/apps/services/course_services/learning_progess_process.py

@@ -100,7 +100,7 @@ def get_multiagents_dialog_list(user_id: str) -> List[Dict]:
         current_app.logger.error(f"获取MultiAgents对话列表异常: {str(e)}")
         return []
 
-def load_learning_progress(user_id: str, material_id: str, chapter_name: str, lesson_name: str) -> Optional[Dict]:
+def load_learning_progress(user_id: str, material_id: str, chapter_name: str, lesson_name: str) -> Dict:
     """
     加载用户学习进度
     
@@ -111,7 +111,10 @@ def load_learning_progress(user_id: str, material_id: str, chapter_name: str, le
     - lesson_name: 课时名
     
     返回：
-    - Optional[Dict]: 学习进度数据，如果不存在则返回None
+    - Dict: 学习进度数据，包含以下字段：
+      - exists: bool，表示学习记录是否存在
+      - data: Dict，学习进度详细数据，包含chat_historys、scores、chapter_chain_now等字段
+      - message: str，操作结果描述
     """
     try:
         mongo = current_app.extensions["mongo"]
@@ -126,11 +129,44 @@ def load_learning_progress(user_id: str, material_id: str, chapter_name: str, le
             # 转换ObjectId为字符串
             if "_id" in progress:
                 progress["_id"] = str(progress["_id"])
-            return progress
-        return None
+            return {
+                "exists": True,
+                "data": progress,
+                "message": "学习记录加载成功"
+            }
+        # 返回默认值，确保即使没有学习记录也有完整的结构
+        return {
+            "exists": False,
+            "data": {
+                "user_id": user_id,
+                "material_id": material_id,
+                "chapter_name": chapter_name,
+                "lesson_name": lesson_name,
+                "chat_historys": [],
+                "scores": [],
+                "chapter_chain_now": None,
+                "updated_at": datetime.now().isoformat()
+            },
+            "message": "未找到学习记录，返回默认值"
+        }
     except Exception as e:
-        current_app.logger.error(f"加载学习进度失败: {str(e)}")
-        return None
+        error_msg = f"加载学习进度失败: {str(e)}"
+        current_app.logger.error(error_msg)
+        # 发生错误时返回默认结构，确保系统稳定性
+        return {
+            "exists": False,
+            "data": {
+                "user_id": user_id,
+                "material_id": material_id,
+                "chapter_name": chapter_name,
+                "lesson_name": lesson_name,
+                "chat_historys": [],
+                "scores": [],
+                "chapter_chain_now": None,
+                "updated_at": datetime.now().isoformat()
+            },
+            "message": error_msg
+        }
 
 
 def upload_learning_progress_to_cloud(progress: Dict) -> Dict: