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

### What problem does this PR solve?

Chats /chat API to RESTFul.

### Type of change

- [x] Refactoring

Author: yongtenglei

admin/client/ragflow_client.py

@@ -977,76 +977,13 @@ def list_user_chats(self, command):
     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": "",
-            "language": "English",
+            "dataset_ids": [],
             "llm_setting": {},
             "prompt_config": {
                 "empty_response": "",
@@ -1064,16 +1001,24 @@ def create_user_chat(self, command):
                         "optional": False
                     }
                 ],
-                "toc_enhance": False
+                "toc_enhance": False,
             },
             "similarity_threshold": 0.2,
             "top_n": 8,
-            "vector_similarity_weight": 0.3
+            "top_k": 1024,
+            "vector_similarity_weight": 0.3,
+            "rerank_id": default_models.get("rerank_id", ""),
         }
-
-        payload.update({"name": chat_name})
-        response = self.http_client.request("POST", "/dialog/set", json_body=payload, use_api_base=False,
-                                            auth_kind="web")
+        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",
+        )
         res_json = response.json()
         if response.status_code == 200 and res_json["code"] == 0:
             print(f"Success to create chat: {chat_name}")
@@ -1158,9 +1103,14 @@ def drop_user_chat(self, command):
         for elem in res_json:
             if elem["name"] == chat_name:
                 to_drop_chat_ids.append(elem["id"])
-        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")
+        payload = {"ids": to_drop_chat_ids}
+        response = self.http_client.request(
+            "DELETE",
+            "/chats",
+            json_body=payload,
+            use_api_base=True,
+            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}")
@@ -1622,17 +1572,27 @@ def _get_dataset_id(self, dataset_name: str):
     def _list_chats(self, command):
         iterations = command.get("iterations", 1)
         if iterations > 1:
-            response = self.http_client.request("POST", "/dialog/next", use_api_base=False, auth_kind="web",
-                                                iterations=iterations)
+            response = self.http_client.request(
+                "GET",
+                "/chats",
+                use_api_base=True,
+                auth_kind="web",
+                iterations=iterations,
+            )
             return response
         else:
-            response = self.http_client.request("POST", "/dialog/next", use_api_base=False, auth_kind="web",
-                                                iterations=iterations)
+            response = self.http_client.request(
+                "GET",
+                "/chats",
+                use_api_base=True,
+                auth_kind="web",
+                iterations=iterations,
+            )
             res_json = response.json()
             if response.status_code == 200 and res_json["code"] == 0:
-                return res_json["data"]["dialogs"]
+                return res_json["data"]["chats"]
             else:
-                print(f"Fail to list datasets, code: {res_json['code']}, message: {res_json['message']}")
+                print(f"Fail to list chats, code: {res_json['code']}, message: {res_json['message']}")
                 return None
 
     def _get_default_models(self):