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):

test/testcases/test_web_api/common.py

@@ -30,6 +30,7 @@ KB_APP_URL = f"/{VERSION}/kb"
 DATASETS_URL = f"/api/{VERSION}/datasets"
 DOCUMENT_APP_URL = f"/{VERSION}/document"
 CHUNK_API_URL = f"/{VERSION}/chunk"
+DIALOG_APP_URL = f"/{VERSION}/dialog"
 # SESSION_WITH_CHAT_ASSISTANT_API_URL = "/api/v1/chats/{chat_id}/sessions"
 # SESSION_WITH_AGENT_API_URL = "/api/v1/agents/{agent_id}/sessions"
 MEMORY_API_URL = f"/api/{VERSION}/memories"
@@ -468,6 +469,103 @@ def batch_add_chunks(auth, doc_id, num):
     return chunk_ids
 
 
+# DIALOG APP
+def create_dialog(auth, payload=None, *, headers=HEADERS, data=None):
+    if payload is None:
+        payload = {}
+    url = f"{HOST_ADDRESS}{DIALOG_APP_URL}/set"
+    req_id = str(uuid.uuid4())
+    req_headers = dict(headers)
+    req_headers["X-Request-ID"] = req_id
+    start = time.monotonic()
+    res = requests.post(url=url, headers=req_headers, auth=auth, json=payload, data=data)
+    elapsed_ms = (time.monotonic() - start) * 1000
+    resp_json = None
+    json_error = None
+    try:
+        resp_json = res.json()
+    except ValueError as exc:
+        json_error = exc
+    _log_http_debug("POST", url, req_id, payload, res.status_code, res.text, resp_json, elapsed_ms)
+    if _http_debug_enabled():
+        if not res.ok or (resp_json is not None and resp_json.get("code") != 0):
+            payload_summary = _redact_payload(payload)
+            raise AssertionError(
+                "HTTP helper failure: "
+                f"req_id={req_id} url={url} status={res.status_code} "
+                f"payload={payload_summary} response={res.text}"
+            )
+    if json_error:
+        raise json_error
+    return resp_json
+
+
+def update_dialog(auth, payload=None, *, headers=HEADERS, data=None):
+    res = requests.post(url=f"{HOST_ADDRESS}{DIALOG_APP_URL}/set", headers=headers, auth=auth, json=payload, data=data)
+    return res.json()
+
+
+def get_dialog(auth, params=None, *, headers=HEADERS):
+    res = requests.get(url=f"{HOST_ADDRESS}{DIALOG_APP_URL}/get", headers=headers, auth=auth, params=params)
+    return res.json()
+
+
+def list_dialogs(auth, *, headers=HEADERS):
+    res = requests.get(url=f"{HOST_ADDRESS}{DIALOG_APP_URL}/list", headers=headers, auth=auth)
+    return res.json()
+
+
+def delete_dialog(auth, payload=None, *, headers=HEADERS, data=None):
+    res = requests.post(url=f"{HOST_ADDRESS}{DIALOG_APP_URL}/rm", headers=headers, auth=auth, json=payload, data=data)
+    return res.json()
+
+
+def batch_create_dialogs(auth, num, kb_ids=None):
+    if kb_ids is None:
+        kb_ids = []
+
+    dialog_ids = []
+    for i in range(num):
+        if kb_ids:
+            prompt_config = {
+                "system": "You are a helpful assistant. Use the following knowledge to answer questions: {knowledge}",
+                "parameters": [{"key": "knowledge", "optional": False}],
+            }
+        else:
+            prompt_config = {
+                "system": "You are a helpful assistant.",
+                "parameters": [],
+            }
+        payload = {
+            "name": f"dialog_{i}",
+            "description": f"Test dialog {i}",
+            "kb_ids": kb_ids,
+            "prompt_config": prompt_config,
+            "top_n": 6,
+            "top_k": 1024,
+            "similarity_threshold": 0.1,
+            "vector_similarity_weight": 0.3,
+            "llm_setting": {"model": "gpt-3.5-turbo", "temperature": 0.7},
+        }
+        res = create_dialog(auth, payload)
+        if res is None or res.get("code") != 0:
+            uses_knowledge = "{knowledge}" in payload["prompt_config"]["system"]
+            raise AssertionError(
+                "batch_create_dialogs failed: "
+                f"res={res} kb_ids_len={len(kb_ids)} uses_knowledge={uses_knowledge}"
+            )
+        if res["code"] == 0:
+            dialog_ids.append(res["data"]["id"])
+    return dialog_ids
+
+
+def delete_dialogs(auth):
+    res = list_dialogs(auth)
+    if res["code"] == 0 and res["data"]:
+        dialog_ids = [dialog["id"] for dialog in res["data"]]
+        if dialog_ids:
+            delete_dialog(auth, {"dialog_ids": dialog_ids})
+
 # MEMORY APP
 def create_memory(auth, payload=None):
     url = f"{HOST_ADDRESS}{MEMORY_API_URL}"