Revert "Refa: Chats /chat API to RESTFul (#13871)" (#13877)

### What problem does this PR solve?

This reverts commit 1a608ac411.

### Type of change

- [x] Other (please describe):

admin/client/ragflow_client.py

@@ -977,13 +977,76 @@ class RAGFlowClient:
     def create_user_chat(self, command):
         if self.server_type != "user":
             print("This command is only allowed in USER mode")
+        '''
+        description
+        : 
+        ""
+        icon
+        : 
+        ""
+        language
+        : 
+        "English"
+        llm_id
+        : 
+        "glm-4-flash@ZHIPU-AI"
+        llm_setting
+        : 
+        {}
+        name
+        : 
+        "xx"
+        prompt_config
+        : 
+        {empty_response: "", prologue: "Hi! I'm your assistant. What can I do for you?", quote: true,…}
+        empty_response
+        : 
+        ""
+        keyword
+        : 
+        false
+        parameters
+        : 
+        [{key: "knowledge", optional: false}]
+        prologue
+        : 
+        "Hi! I'm your assistant. What can I do for you?"
+        quote
+        : 
+        true
+        reasoning
+        : 
+        false
+        refine_multiturn
+        : 
+        false
+        system
+        : 
+        "You are an intelligent assistant. Your primary function is to answer questions based strictly on the provided knowledge base.\n\n      **Essential Rules:**\n        - Your answer must be derived **solely** from this knowledge base: `{knowledge}`.\n        - **When information is available**: Summarize the content to give a detailed answer.\n        - **When information is unavailable**: Your response must contain this exact sentence: \"The answer you are looking for is not found in the knowledge base!\"\n        - **Always consider** the entire conversation history."
+        toc_enhance
+        : 
+        false
+        tts
+        : 
+        false
+        use_kg
+        : 
+        false
+        similarity_threshold
+        : 
+        0.2
+        top_n
+        : 
+        8
+        vector_similarity_weight
+        : 
+        0.3
+        '''
         chat_name = command["chat_name"]
-        default_models = self._get_default_models() or {}
         payload = {
-            "name": chat_name,
             "description": "",
             "icon": "",
-            "dataset_ids": [],
+            "language": "English",
             "llm_setting": {},
             "prompt_config": {
                 "empty_response": "",
@@ -1001,24 +1064,16 @@ class RAGFlowClient:
                         "optional": False
                     }
                 ],
-                "toc_enhance": False,
+                "toc_enhance": False
             },
             "similarity_threshold": 0.2,
             "top_n": 8,
-            "top_k": 1024,
-            "vector_similarity_weight": 0.3,
-            "rerank_id": default_models.get("rerank_id", ""),
+            "vector_similarity_weight": 0.3
         }
-        if default_models.get("llm_id"):
-            payload["llm_id"] = default_models["llm_id"]
 
-        response = self.http_client.request(
-            "POST",
-            "/chats",
-            json_body=payload,
-            use_api_base=True,
-            auth_kind="web",
-        )
+        payload.update({"name": chat_name})
+        response = self.http_client.request("POST", "/dialog/set", json_body=payload, use_api_base=False,
+                                            auth_kind="web")
         res_json = response.json()
         if response.status_code == 200 and res_json["code"] == 0:
             print(f"Success to create chat: {chat_name}")
@@ -1103,14 +1158,9 @@ class RAGFlowClient:
         for elem in res_json:
             if elem["name"] == chat_name:
                 to_drop_chat_ids.append(elem["id"])
-        payload = {"ids": to_drop_chat_ids}
-        response = self.http_client.request(
-            "DELETE",
-            "/chats",
-            json_body=payload,
-            use_api_base=True,
-            auth_kind="web",
-        )
+        payload = {"dialog_ids": to_drop_chat_ids}
+        response = self.http_client.request("POST", "/dialog/rm", json_body=payload, use_api_base=False,
+                                            auth_kind="web")
         res_json = response.json()
         if response.status_code == 200 and res_json["code"] == 0:
             print(f"Success to drop chat: {chat_name}")
@@ -1572,27 +1622,17 @@ class RAGFlowClient:
     def _list_chats(self, command):
         iterations = command.get("iterations", 1)
         if iterations > 1:
-            response = self.http_client.request(
-                "GET",
-                "/chats",
-                use_api_base=True,
-                auth_kind="web",
-                iterations=iterations,
-            )
+            response = self.http_client.request("POST", "/dialog/next", use_api_base=False, auth_kind="web",
+                                                iterations=iterations)
             return response
         else:
-            response = self.http_client.request(
-                "GET",
-                "/chats",
-                use_api_base=True,
-                auth_kind="web",
-                iterations=iterations,
-            )
+            response = self.http_client.request("POST", "/dialog/next", use_api_base=False, auth_kind="web",
+                                                iterations=iterations)
             res_json = response.json()
             if response.status_code == 200 and res_json["code"] == 0:
-                return res_json["data"]["chats"]
+                return res_json["data"]["dialogs"]
             else:
-                print(f"Fail to list chats, code: {res_json['code']}, message: {res_json['message']}")
+                print(f"Fail to list datasets, code: {res_json['code']}, message: {res_json['message']}")
                 return None
 
     def _get_default_models(self):