fix: replace API call with build_cls_from_json_with_retry function (#548)

* refactor: Replace API call with build_cls_from_json_with_retry function

* fix lint error

* fix lint errors

* lint

* trigger

rdagent/utils/agent/__init__.py

@@ -0,0 +1,3 @@
+from .workflow import build_cls_from_json_with_retry
+
+__all__ = ["build_cls_from_json_with_retry"]

rdagent/utils/agent/workflow.py

@@ -0,0 +1,44 @@
+import json
+from typing import Type, TypeVar
+
+from rdagent.core.exception import FormatError
+from rdagent.log import rdagent_logger as logger
+from rdagent.oai.llm_utils import APIBackend
+
+T = TypeVar("T")
+
+
+def build_cls_from_json_with_retry(
+    cls: Type[T], system_prompt: str, user_prompt: str, retry_n: int = 5, **kwargs: dict
+) -> T:
+    """
+    Parameters
+    ----------
+    cls : Type[T]
+        The class type to be instantiated with the response data.
+    system_prompt : str
+        The initial prompt provided to the system for context.
+    user_prompt : str
+        The prompt given by the user to guide the response generation.
+    retry_n : int
+        The number of attempts to retry in case of failure.
+    **kwargs
+        Additional keyword arguments passed to the API call.
+
+    Returns
+    -------
+    T
+        An instance of the specified class type created from the response data.
+    """
+    for i in range(retry_n):
+        # currently, it only handle exception caused by initial class
+        resp = APIBackend().build_messages_and_create_chat_completion(
+            user_prompt=user_prompt, system_prompt=system_prompt, json_mode=True, **kwargs  # type: ignore[arg-type]
+        )
+        try:
+            return cls(**json.loads(resp))
+        except Exception as e:
+            logger.warning(f"Attempt {i + 1}: The previous attempt didn't work due to: {e}")
+            user_prompt = user_prompt + f"\n\nAttempt {i + 1}: The previous attempt didn't work due to: {e}"
+    else:
+        raise FormatError("Unable to produce a JSON response that meets the specified requirements.")